Dye Patents (Class 372/53)
  • Patent number: 10450441
    Abstract: The invention provides a solid state dye laser and methods for preparing the solid state dye laser. The solid state dye laser includes a porous copolymer membrane of poly(vinylidenefloride-cohexafluoroproplyne (PVDF-HFP) and a laser dye. The laser dye is incorporated in pores of the copolymer membrane. The solid state dye laser is prepared using one of a phase inversion technique, a phase separation technique, and a breath figure technique.
    Type: Grant
    Filed: October 1, 2015
    Date of Patent: October 22, 2019
    Assignee: The King Abdulaziz City for Science and Technology (KACST)
    Inventors: Nezar Hassan Khdary, Mamdouh E Abdelsalam
  • Patent number: 9316531
    Abstract: A signs-of-deterioration detector for a semiconductor laser includes a first light receiving section that acquires first information relating to an optical output of the semiconductor laser and a second light receiving section that acquires second information relating to an intensity distribution of the emission pattern below the lasing threshold of the semiconductor laser. The detector also includes a holding section that holds the first information and the second information at a predetermined time point T1. The detector further includes a deciding section that decides the presence or absence of signs of rapid decrease of the optical output of the semiconductor laser by comparing the first information and the second information at at least one time point Tn (T1<Tn), with those at the time point T1.
    Type: Grant
    Filed: August 29, 2012
    Date of Patent: April 19, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Takako Suga, Takeshi Uchida
  • Patent number: 9062038
    Abstract: This invention provides compounds of formula IA or IB: wherein HY, R1, R2, G1, W, n, and A are as described in the specification. The compounds are inhibitors of PI3K and/or mTor and are thus useful for treating proliferative, inflammatory, or cardiovascular disorders.
    Type: Grant
    Filed: August 10, 2011
    Date of Patent: June 23, 2015
    Assignee: Millennium Pharmaceuticals, Inc.
    Inventors: Masaaki Hirose, Yongbo Hu, Zhigen Hu, Hong Myung Lee, Zhan Shi, Stepan Vyskocil, Tianlin Xu
  • Publication number: 20140371106
    Abstract: The invention provides light-emitting compositions, including lasing and fluorescent compositions. The invention particularly relates to programmable biological substrates, which fluoresce and/or lase, and which have a wide variety of different applications. The invention extends to use of the fluorescent compositions and lasing compositions comprising programmable biological substrates in fabricating lasers, and in various biological imaging applications, such as in assays.
    Type: Application
    Filed: December 21, 2012
    Publication date: December 18, 2014
    Applicant: UCL BUSINESS PLC
    Inventors: John Edward Hales, John Ward, Gabriel Aeppli, Tim Dafforn
  • Publication number: 20140306869
    Abstract: The transition metal complex is represented by Formula (1) [where M represents a transition metal element; K and L each represent a monodentate or bidentate ligand; m and o each represent an integer from 0 to 5; n represents an integer from 1 to 3; X, Y, R1, R2, and R4 each represent a hydrogen atom, alkyl, cycloalkyl, heterocycloalkyl, aryl, heteroaryl, aralkyl, alkenyl, alkynyl, or alkoxy; R3 represents a hydrogen atom, alkyl, cycloalkyl, heterocycloalkyl, aryl, aralkyl, heteroaryl, alkenyl, alkynyl, aryloxy, or alkoxy having two or more carbon atoms; and A represents alkyl, cycloalkyl, heterocycloalkyl, aryl, heteroaryl, aralkyl, alkenyl, alkynyl, or alkoxy].
    Type: Application
    Filed: September 14, 2012
    Publication date: October 16, 2014
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Yoshimasa Fujita, Masahito Ohe, Makoto Yamada, Tetsuji Itoh, Ayataka Endo
  • Publication number: 20140294032
    Abstract: The challenge of providing a long-life solid-state dye laser medium is tackled. This challenge is solved by a solid-state dye laser medium comprising a polydimethylsiloxane, and a dye dissolved in the polydimethylsiloxane. The dye is preferably a pyrromethene dye.
    Type: Application
    Filed: March 29, 2012
    Publication date: October 2, 2014
    Applicant: KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION
    Inventors: Hiroaki Yoshioka, Yuji Oki, Yu Yang
  • Publication number: 20140269806
    Abstract: A plasmonic laser device has resonant nanocavities filled with a gain medium containing an organic dye. The resonant plasmon frequencies of the nanocavities are tuned to align with both the absorption and emission spectra of the dye.
    Type: Application
    Filed: February 21, 2014
    Publication date: September 18, 2014
    Inventors: Mihail BORA, Tiziana C. BOND
  • Patent number: 8837550
    Abstract: An organic dye laser produces a continuous-wave (cw) output without any moving parts (e.g., without using flowing dye streams or spinning discs of solid-state dye media to prevent photobleaching) and with a pump beam that is stationary with respect to the organic dye medium. The laser's resonant cavity, organic dye medium, and pump beam are configured to excite a lasing transition over a time scale longer than the associated decay lifetimes in the organic dye medium without photobleaching the organic dye medium. Because the organic dye medium does not photobleach when operating in this manner, it may be pumped continuously so as to emit a cw output beam. In some examples, operation in this manner lowers the lasing threshold (e.g., to only a few Watts per square centimeter), thereby facilitating electrical pumping for cw operation.
    Type: Grant
    Filed: March 6, 2013
    Date of Patent: September 16, 2014
    Assignee: Massachusetts Institute of Technology
    Inventors: Ofer Shapira, Song-Liang Chua, Bo Zhen, Jeongwon Lee, Marin Soljacic
  • Patent number: 8811449
    Abstract: The invention relates to a light source, comprising an optical resonator (1) and an optical medium (2) arranged therein that can be excited so as to emit light, wherein the optical medium (2) comprises at least one two-level system, in particular a two-level system that is not population-inverted, having an at least metastable lower state, and the optical length of the resonator (1) comprising at least one curved mirror (1) is selected such that the free spectral bandwidth of the resonator is equal to or greater than the absorption bandwidth and/or fluorescence bandwidth of the optical medium (2) and only a single longitudinal mode and a plurality of transversal modes of the resonator (1) are arranged within the fluorescence bandwidth.
    Type: Grant
    Filed: September 21, 2010
    Date of Patent: August 19, 2014
    Assignee: Rheinische Friedrich-Willhelms Universitaet Bonn
    Inventors: Frank Vewinger, Martin Weitz, Jan Klaers
  • Publication number: 20140152637
    Abstract: Disclosed is a transition metal complex represented by the following formula (1): (wherein M represents a transition metal element; K represents an uncharged monodentate or bidentate ligand; L represents a monodentate or bidentate monoanionic or dianionic ligand; m and o represent an integer from 0 to 5; n represents an integer from 1 to 3; p represents an integer from 0 to 4; W— represents a counterion; and Y1 to Y4, R1, and R2 each independently represent a hydrogen atom, an alkyl group, a cycloalkyl group, a heterocycloalkyl group, an aryl group, an aralkyl group, a heteroaryl group, an alkenyl group, an alkynyl group, or an alkoxy group).
    Type: Application
    Filed: May 15, 2012
    Publication date: June 5, 2014
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Yoshimasa Fujita, Masahito Ohe, Tetsuji Itoh
  • Publication number: 20130303776
    Abstract: A luminescent material includes transition metal complex comprising a ligand in which an electron density of a p orbital of a highest occupied molecular orbital level is higher than 0.239 and lower than 0.711 when the electron density is calculated according to quantum chemical calculation (Gaussian09/DFT/RB3LYP/6-31G), the p orbital being in the outermost shell of an element coordinated to the metal.
    Type: Application
    Filed: October 4, 2011
    Publication date: November 14, 2013
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Ken Okamoto, Masahito Ohe, Yoshimasa Fujita, Katsumi Kondoh
  • Patent number: 8509279
    Abstract: The present invention relates to a solid dye resonator, and to a solid dye laser hand piece comprising same. The solid dye resonator comprises: solid dye; a high-reflection mirror; an output coupler; a first mounting plate on which the high-reflection mirror is mounted; a second mounting plate which is spaced apart from the first mounting plate and which has a surface on which the output coupler is mounted; a driving motor mounted on the first mounting plate, such that a motor shaft is directed toward the second mounting plate; and a rotary shaft interposed between the first mounting plate and the second mounting plate, and connected to the motor shaft of the driving motor such that the rotary shaft interlockingly rotates with the rotation of the driving motor.
    Type: Grant
    Filed: July 27, 2010
    Date of Patent: August 13, 2013
    Assignee: Lutronic Corporation
    Inventor: Hee Chul Lee
  • Patent number: 8442078
    Abstract: The laser includes an optical fiber including a cavity containing a microfluidic gain medium bounded by a composite structure of alternating layers of high and low index materials forming an axially invariant, rotationally symmetric photonic bandgap cavity. The optical fiber also includes at least one microfluidic channel containing liquid crystal modulators in the fiber cladding extending in an axial direction and further includes a pair of electrodes flanking the microfluidic channel. An electrical potential across the pair of electrodes will rotate the liquid crystal molecules to rotate the linearly polarized state of light emitted from the cavity. An external linear polarizer is disposed around the fiber to modulate azimuthal laser intensity distribution.
    Type: Grant
    Filed: December 12, 2011
    Date of Patent: May 14, 2013
    Assignee: Massachusetts Institute of Technology
    Inventors: Alexander Stolyarov, Lei Wei, Ofer Shapira, Fabien Sorin, Yoel Fink, John D. Joannopoulos
  • Patent number: 8315288
    Abstract: To reduce the laser threshold by efficiently exciting a light-emitting body in a solid-state dye laser with light having high density, thereby facilitating emission of laser beams, and to miniaturize a solid-state dye laser including an excitation light source. A solid-state dye laser capable of emitting laser beams by efficiently introducing light from an excitation light source to a light-emitting body incorporated in an optical resonator structure and exciting the light-emitting body with light with high density, is realized.
    Type: Grant
    Filed: August 28, 2009
    Date of Patent: November 20, 2012
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Mikio Yukawa, Tetsuo Tsutsui
  • Patent number: 8197722
    Abstract: Compositions capable of simultaneous two-photon absorption and higher order absorptivities are provided. Compounds having a donor-pi-donor or acceptor-pi-acceptor structure are of particular interest, where the donor is an electron donating group, acceptor is an electron accepting group, and pi is a pi bridge linking the donor and/or acceptor groups. The pi bridge may additionally be substituted with electron donating or withdrawing groups to alter the absorptive wavelength of the structure. Also disclosed are methods of generating an excited state of such compounds through optical stimulation with light using simultaneous absorption of photons of energies individually insufficient to achieve an excited state of the compound, but capable of doing so upon simultaneous absorption of two or more such photons. Applications employing such methods are also provided, including controlled polymerization achieved through focusing of the light source(s) used.
    Type: Grant
    Filed: July 30, 2001
    Date of Patent: June 12, 2012
    Assignee: The California Institute of Technology
    Inventors: Seth Marder, Joseph Perry
  • Publication number: 20120120979
    Abstract: The present invention relates to a solid dye resonator, and to a solid dye laser hand piece comprising same. The solid dye resonator comprises: solid dye; a high-reflection mirror; an output coupler; a first mounting plate on which the high-reflection mirror is mounted; a second mounting plate which is spaced apart from the first mounting plate and which has a surface on which the output coupler is mounted; a driving motor mounted on the first mounting plate, such that a motor shaft is directed toward the second mounting plate; and a rotary shaft interposed between the first mounting plate and the second mounting plate, and connected to the motor shaft of the driving motor such that the rotary shaft interlockingly rotates with the rotation of the driving motor.
    Type: Application
    Filed: July 27, 2010
    Publication date: May 17, 2012
    Applicant: LUTRONIC CORPORATION
    Inventor: Hee Chul Lee
  • Patent number: 7912108
    Abstract: A solid-state laser emitting material for use in conjunction with a light source includes a polymer matrix functioning as host materials, containing laser dye of rhodamine 590 or rhodamine 610 as gain materials and nano-submicron particles as scatters therein. The lowest lasing threshold of the laser emitting material is approximately 5 mJ/cm2 for 585 nm emission and 2 mJ/cm2 for 630 nm emission.
    Type: Grant
    Filed: January 11, 2008
    Date of Patent: March 22, 2011
    Assignee: The Hong Kong Polytechnic University
    Inventors: Xiaoming Tao, Xiaohong Sun, Jianguo Deng, Kai-Cheong Kwan
  • Patent number: 7889774
    Abstract: The present invention relates to organic lasers. More specifically, the present invention is directed to an organic laser that provides a self-stimulated source of coherent radiation originating from organic microcavity polaritons. The organic polariton laser of the present invention comprises a substrate, a resonant microcavity comprising an organic polariton emission layer; and an optical pump. In preferred embodiments the optical pump is a microcavity OLED allowing for the fabrication of a self-contained or integrated device.
    Type: Grant
    Filed: June 25, 2004
    Date of Patent: February 15, 2011
    Assignee: The Trustees of Princeton University
    Inventors: Stephen R. Forrest, Russell Holmes
  • Patent number: 7848375
    Abstract: Embodiments disclosed herein relate to a laser die. The laser die includes a base epitaxial portion, a mesa portion, and first and second facets, wherein at least one of the first and second facets is flared such that an area of the facet is increased. Embodiments disclosed herein also relate to a high-speed laser. The high-speed laser includes a substrate, an active region positioned above the substrate, a mesa positioned above the active region, and one or more facets, wherein at least one of the one or more facets includes a flared portion configured to increase an area of the facet.
    Type: Grant
    Filed: May 30, 2008
    Date of Patent: December 7, 2010
    Assignee: Finisar Corporation
    Inventor: Sumesh Mani K. Thiyagarajan
  • Publication number: 20100303119
    Abstract: The present invention generally relates to lasers comprising fluidic channels, such as microfluidic channels. In some instances, the channel contains two or more fluids. The fluids may remain non-mixed within the channel, for example, due to immiscibility and/or laminar flow within the channel. The fluids may be arranged in the channel such that light propagating in a first fluid is prevented by the second fluid from exiting the first fluid, for example, due to differences in the indexes of refraction (e.g., causing internal reflection of the fluid to occur). Thus, in one embodiment, a first fluid may be at least partially surrounded by a second fluid having a second index of refraction lower than the index of refraction of the first fluid. In some embodiments, the fluidic channel is used as a laser, for instance, a dye laser, i.e., a laser created by directing light at a dye to produce coherent light. The dye may be present in one or more fluids within the fluidic channel.
    Type: Application
    Filed: February 8, 2006
    Publication date: December 2, 2010
    Applicants: President and Fellows of Harvard College, Massachusetts Institute of Technology
    Inventors: Brian T. Mayers, Richard S. Conroy, Dmitri V. Vezenov, Preston Snee, Yinthai Chan, Moungi G. Bawendi, George M. Whitesides
  • Patent number: 7826510
    Abstract: A laser oscillation element 1 according to the invention comprises a cholesteric liquid crystal layer 2 containing cholesteric liquid crystals, a cholesteric liquid crystal layer 3 containing cholesteric liquid crystals facing the cholesteric liquid crystal layer 2, and a defect layer 4 containing a dye 5 which emits fluorescence upon optical excitation disposed between the cholesteric liquid crystal layers 2, 3. A selective reflection wavelength band in the cholesteric liquid crystals overlaps with the emission band of the fluorescence emitted by the dye 5, the helical winding directions of the cholesteric liquid crystals contained in the cholesteric liquid crystal layers 2, 3 are identical, and the transition moments of the dye 5 are aligned parallel to the surfaces of the cholesteric liquid crystal layers 2, 3. According to the laser oscillation element 1, a laser oscillation can be generated with high efficiency. Moreover, continuous wave lasing can be generated.
    Type: Grant
    Filed: October 8, 2004
    Date of Patent: November 2, 2010
    Assignee: Nippon Oil Corporation
    Inventors: Hideo Takezoe, Junji Watanabe, Myoung Hoon Song, Byoungchoo Park, Ki-Chul Shin, Takehiro Toyooka, Suzushi Nishimura
  • Patent number: 7817698
    Abstract: The invention relates to a microfluidic dye laser including a pump light source configured to provide light having a pump light wavelength. The microfluidic dye laser also includes an elastomer substantially optically transparent at the pump light wavelength and at a microfluidic dye laser wavelength. A microfluidic channel configured to accept a fluidic dye is defined in the elastomer. An optical grating is formed in a single mode 3D waveguide in the microfluidic channel in order to provide a single mode microfluidic dye laser light as output in response to illumination with light from the pump light source. In another aspect, the invention features a method of tuning a wavelength of a microfluidic dye laser light by mechanically deforming the elastomeric laser chip to change the grating period in the optical cavity.
    Type: Grant
    Filed: August 9, 2007
    Date of Patent: October 19, 2010
    Assignee: California Institute of Technology
    Inventors: Zhenyu Li, Demetri Psaltis, Axel Scherer, Zhaoyu Zhang
  • Patent number: 7817697
    Abstract: A method for generating a laser output signal includes the steps of: generating an optical pump signal that is a sequence optical pulses each having a duration of about n?f, where ?f represents a flourescence lifetime of a laser dye and 3?n?25; directing the optical pump signal into an optical resonant cavity having a laser dye gain element that contains the laser dye for transforming the optical pump signal into an excited optical signal; resonating the excited optical signal in the optical resonant cavity; and emitting a portion of the excited optical signal from the optical resonant cavity.
    Type: Grant
    Filed: July 28, 2003
    Date of Patent: October 19, 2010
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Richard Scheps
  • Patent number: 7792175
    Abstract: There are disclosed compounds for assisting triplet absorption in a laser, such as a pulsed-dye laser, the compounds comprising at least one molecule chosen from nitroxides and nitrones. In one embodiment, the disclosed compounds may be mixed with the dye of a dye laser in an amount sufficient to assist in triplet absorption. In one embodiment, the nitroxide compound comprises tempol[4-hydroxy-2,2,6,6-tetramethyl-piperidinyloxy, free radical]. Also disclosed are methods of using the disclosed compounds to control the triplet absorption of a dye laser or improve the performance or life span of a gaseous or solid laser.
    Type: Grant
    Filed: March 27, 2008
    Date of Patent: September 7, 2010
    Inventor: Eric F. Bernstein
  • Patent number: 7684112
    Abstract: The present invention relates to a method and system of generating backward stimulated Rayleigh-Bragg scattering by focusing activating radiation through a multi-photon absorbing dye solution, thereby producing coherent output radiation with no measured frequency shift and measured pump threshold values independent of the spectral line width of the input activating radiation.
    Type: Grant
    Filed: June 13, 2008
    Date of Patent: March 23, 2010
    Assignee: The Research Foundation of State University of New York
    Inventors: Guang S. He, Paras N. Prasad
  • Publication number: 20100054294
    Abstract: To reduce the laser threshold by efficiently exciting a light-emitting body in a solid-state dye laser with light having high density, thereby facilitating emission of laser beams, and to miniaturize a solid-state dye laser including an excitation light source. A solid-state dye laser capable of emitting laser beams by efficiently introducing light from an excitation light source to a light-emitting body incorporated in an optical resonator structure and exciting the light-emitting body with light with high density, is realized.
    Type: Application
    Filed: August 28, 2009
    Publication date: March 4, 2010
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Mikio YUKAWA, Tetsuo TSUTSUI
  • Publication number: 20090161699
    Abstract: A solid-state laser emitting material for use in conjunction with a light source includes a polymer matrix functioning as host materials, containing laser dye of rhodamine 590 or rhodamine 610 as gain materials and nano-submicron particles as scatters therein. The lowest lasing threshold of the laser emitting material is approximately 5 mJ/cm2 for 585 nm emission and 2 mJ/cm2 for 630 nm emission.
    Type: Application
    Filed: January 11, 2008
    Publication date: June 25, 2009
    Inventors: Xiaoming Tao, Xiaohong Sun, Jianguo Deng, Kai-Cheong Kwan
  • Publication number: 20080298422
    Abstract: Although having been used for conventional dye laser solvents, organic solvents have a disadvantage of volatility and inflammability, which makes a dye laser device large and cumbersome. In the present invention, which has been developed to solve this problem, an ionic liquid is used as the dye laser solvent. An organic dye stably dissolves in an ionic liquid and the light-emitting property is almost comparable to the case where an organic solvent is used. Since ionic liquids do not have volatility and inflammability, the dye laser medium according to the present invention is extremely easy to handle. In addition, it also has a property that the photobleach is extremely low compared to conventional dye laser mediums using an organic solvent as the solvent thereof. It is easy to obtain a laser sensor for detecting a predetermined specimen with high sensitivity using the dye laser medium according to the present invention.
    Type: Application
    Filed: January 26, 2007
    Publication date: December 4, 2008
    Applicant: NATIONAL UNIVERSITY CORPORATION NARA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Tsuyoshi Kawai, Takuya Nakashima
  • Publication number: 20080298421
    Abstract: There are disclosed compounds for assisting triplet absorption in a laser, such as a pulsed-dye laser, the compounds comprising at least one molecule chosen from nitroxides and nitrones. In one embodiment, the disclosed compounds may be mixed with the dye of a dye laser in an amount sufficient to assist in triplet absorption. In one embodiment, the nitroxide compound comprises tempol [4-hydroxy-2,2,6,6-tetramethyl-piperidinyloxy, free radical]. Also disclosed are methods of using the disclosed compounds to control the triplet absorption of a dye laser or improve the performance or life span of a gaseous or solid laser.
    Type: Application
    Filed: March 27, 2008
    Publication date: December 4, 2008
    Inventor: Eric F. Bernstein
  • Patent number: 7443900
    Abstract: The present invention relates to a laser gain medium comprising at least one active species adapted to be stimulated to emit laser light within a predetermined wavelength range and optical feedback means defining a resonator for said laser light. The feedback means comprise at least one substantially solid cholesteric layer having a substantially planar texture exhibiting selective reflection of light defined by a reflection band tuned to said predetermined wavelength range.
    Type: Grant
    Filed: August 29, 2002
    Date of Patent: October 28, 2008
    Assignee: BASF Aktiengesellschaft
    Inventors: Reinhold J. Leyrer, Holger Schoepke, Christoph Hamers
  • Publication number: 20080165820
    Abstract: To provide a DFB solid-state dye laser including a grating having Moire interference fringes. A DFB solid-state dye laser element includes: a laser medium containing an organic dye; and a distribution feedback type resonance unit having a third grating including a Moire fringe corresponding to an overlap between a first grating and a second grating formed in different directions. The third grating including a Moire fringe is formed by irradiating a photoresist with a laser for two-beam interference exposure, and then rotating a substrate by a predetermined angle and re-irradiating the substrate with the laser.
    Type: Application
    Filed: December 6, 2007
    Publication date: July 10, 2008
    Applicant: MINEBEA CO., LTD.
    Inventor: Makoto Fukuda
  • Publication number: 20080159351
    Abstract: The invention relates to a microfluidic dye laser including a pump light source configured to provide light having a pump light wavelength. The microfluidic dye laser also includes an elastomer substantially optically transparent at the pump light wavelength and at a microfluidic dye laser wavelength. A microfluidic channel configured to accept a fluidic dye is defined in the elastomer. An optical grating is formed in a single mode 3D waveguide in the microfluidic channel in order to provide a single mode microfluidic dye laser light as output in response to illumination with light from the pump light source. In another aspect, the invention features a method of tuning a wavelength of a microfluidic dye laser light by mechanically deforming the elastomeric laser chip to change the grating period in the optical cavity.
    Type: Application
    Filed: August 9, 2007
    Publication date: July 3, 2008
    Applicant: California Institute of Technology
    Inventors: Zhenyu Li, Demetri Psaltis, Axel Scherer, Zhaoyu Zhang
  • Patent number: 7342951
    Abstract: A semiconductor laser diode that internally converts one or more short wavelength “pump” beams to an output beam at a longer wavelength using nonlinear optical frequency conversion in the semiconductor. Modal phase matching of the pump and output beams in a semiconductor waveguide allows the conversion process to proceed with high efficiency.
    Type: Grant
    Filed: January 18, 2005
    Date of Patent: March 11, 2008
    Assignee: Quintessence Photonics Corporation
    Inventors: Robert M. Lammert, Jeffrey E. Ungar
  • Patent number: 7253871
    Abstract: An efficient technique for producing deterministically polarized single photons uses liquid-crystal hosts of either monomeric or oligomeric/polymeric form to preferentially align the single emitters for maximum excitation efficiency. Deterministic molecular alignment also provides deterministically polarized output photons; using planar-aligned cholesteric liquid crystal hosts as 1-D photonic-band-gap microcavities tunable to the emitter fluorescence band to increase source efficiency, using liquid crystal technology to prevent emitter bleaching. Emitters comprise soluble dyes, inorganic nanocrystals or trivalent rare-earth chelates.
    Type: Grant
    Filed: January 9, 2004
    Date of Patent: August 7, 2007
    Assignee: University of Rochester
    Inventors: Svetlana G. Lukishova, Robert W. Boyd, Carlos R. Stroud
  • Patent number: 7239656
    Abstract: A method of minimizing contamination of optical components of a laser resonator is disclosed. The resonator components are located in an enclosure, which may contain contaminants including water vapor and organic favor released by the optical components, mounts of the optical components, or the enclosure itself. The enclosure may also contain suspended particulate matter. In order to reduce the level of these contaminants, a purging system extracts gas from the enclosure and passes the gas through a desiccant, an organic vapor trapping material, and a particulate matter filter then returns the extracted gas to the enclosure. The purging system is particularly useful for ultrafast lasers and ultraviolet lasers where the power of the laser radiation increases the probability of destabilizing reactions between laser radiation and contaminants.
    Type: Grant
    Filed: August 12, 2004
    Date of Patent: July 3, 2007
    Assignee: Coherent, Inc.
    Inventors: Yang Pang, Matthew Perry Philpott
  • Patent number: 7190706
    Abstract: A laser package includes a submount, a laser die mounted on the submount, a lid mounted on the submount over the laser die, and a soft metal disposed between the laser die and the lid, wherein the soft metal conducts heat between the laser die and the lid. The soft metal is able to creep or cold flow under pressure to accommodate for varying manufacturing tolerances and varying thermal expansion rates of the elements in the laser package.
    Type: Grant
    Filed: December 10, 2003
    Date of Patent: March 13, 2007
    Assignee: Avago Technologies Fiber IP (Singapore) Ptd. Ltd.
    Inventor: Laurence Ray McColloch
  • Patent number: 7113533
    Abstract: The present invention relates to an amplifying medium for solid-state dye lasers and to a solid-state dye laser provided with an amplifying medium of this type. The amplifying medium according to the invention comprises an essentially solid active medium which contains at least one type of activatable particle which can be excited to emit laser light in a certain wavelength range, and optical feedback means which define a resonator for the laser light, where the feedback means comprise an essentially solid feedback medium which has a periodic structure. The feedback medium in the amplifying medium is a polymeric dispersion film having a crystalline structure which comprises, in particular, core/shell particles which can be formed into a film.
    Type: Grant
    Filed: November 20, 2002
    Date of Patent: September 26, 2006
    Assignee: BASF Aktiengesellschaft
    Inventors: Reinhold J. Leyrer, Christoph Hamers, Holger Schoepke
  • Patent number: 7088757
    Abstract: Use of spiro compounds of formula (I), where K1 and K2 are, independently of one another, conjugated systems, as a laser dye.
    Type: Grant
    Filed: January 23, 1999
    Date of Patent: August 8, 2006
    Assignee: Semiconductors GmbH
    Inventors: Nu Yu, Josef Salbeck, Willi Kreuder
  • Patent number: 7065115
    Abstract: A thin-film organic laser, that includes: a substrate; a bottom mirror provided on the substrate; at least one active region deposited on the bottom mirror, wherein the at least one active region includes organic gain material; an external mirror provided at a predetermined distance from the at least one active region such that the bottom mirror combined with the external mirror forms a laser resonator; and an optical pumping means for exciting the organic gain material to produce a laser beam with a wavelength ? and at least one lateral laser mode in the laser resonator and an output of laser light.
    Type: Grant
    Filed: January 29, 2004
    Date of Patent: June 20, 2006
    Assignee: Eastman Kodak Company
    Inventors: Brian E. Kruschwitz, Francisco J. Duarte, Andrew F. Kurtz, John P. Spoonhower
  • Patent number: 6963594
    Abstract: An organic laser cavity device, that includes: a first dielectric stack for receiving and transmitting pumped beam light and being reflective to laser light over a predetermined range of wavelengths and having a substantially low threshold for optical excitation; an organic active region for receiving the transmitted pumped beam light and laser light from the first dielectric stack, and emits the laser light; a second dielectric stack for reflecting the transmitted pumped beam light and the laser light from the organic active region back into the organic active region, wherein a combination of the first and second dielectric stacks and the organic active region outputs the laser light; and an external self-contained photon source of the pumped beam light cooperating with the organic laser cavity for optical excitation at the substantially low threshold.
    Type: Grant
    Filed: October 16, 2002
    Date of Patent: November 8, 2005
    Assignee: Eastman Kodak Company
    Inventors: Joseph A. Manico, John P. Spoonhower, David L. Patton, Edward Covannon
  • Patent number: 6876684
    Abstract: An organic vertical cavity laser light producing device includes a bottom dielectric stack reflective to light over a predetermined range of wavelengths; an organic active region for producing laser light, and having an organic active region including emissive material; and a top dielectric stack spaced from the bottom dielectric stack and reflective to light over a predetermined range of wavelengths. Pump-beam light is transmitted and introduced into the organic active region through at least one of the dielectric stacks. The organic active region includes one or more periodic gain region(s) and organic spacer layers disposed on either side of the periodic gain region(s) and arranged so that the periodic gain region(s) is aligned with the antinodes of the device's standing wave electromagnetic field, and wherein the spacer layers are substantially transparent to the laser light.
    Type: Grant
    Filed: October 11, 2002
    Date of Patent: April 5, 2005
    Assignee: Eastman Kodak Company
    Inventors: Keith B. Kahen, J. Ramon Vargas, Denis Y. Kondakov, Christopher T. Brown, Lelia Cosimbescu, Viktor Jarikov
  • Patent number: 6845114
    Abstract: A vertical cavity organic laser device, that includes: an organic laser cavity including: a bottom dielectric stack for receiving and transmitting pump beam light and being reflective to laser light over a predetermined range of wavelengths; an organic active region for receiving transmitted pump beam light from the bottom dielectric stack and for emitting the laser light; a top dielectric stack for reflecting transmitted pump beam light and laser light from the organic active region back into the organic active region, wherein a combination of the bottom and the top dielectric stacks and the organic active region produces the laser light; the device further including an external pump beam light source for optically pumping light to the organic laser cavity; and a positioner for locating the organic laser cavity in a spaced relationship to the external pump beam light source.
    Type: Grant
    Filed: October 16, 2002
    Date of Patent: January 18, 2005
    Assignee: Eastman Kodak Company
    Inventors: David L. Patton, Joseph A. Manico, Edward Covannon, John P. Spoonhower
  • Patent number: 6839368
    Abstract: High-efficiency laser-like emission at low thresholds in dipolar organic materials upon pulsed optical excitation, without using any external mirrors. Unusually high conversion efficiencies and low thresholds in laser-like emission have been observed in the solutions of organic molecular salts having large dipole moments and specific dye molecules having high photoluminescence efficiencies. Pumped with frequency-doubled pulses from a Nd:YAG laser, conversion efficiencies in the range of 15-40% were achieved without incorporation of external mirrors. The threshold pump energies for such emission have been observed to be low (<8 ?J). The spectrally narrowed output beam was found to have low divergence, high degree of polarization, and pulse-width less than that of the excitation pulses (50 picoseconds).
    Type: Grant
    Filed: March 16, 2001
    Date of Patent: January 4, 2005
    Inventor: Mrinal Thakur
  • Publication number: 20040218649
    Abstract: A controllable single-photon source having a single illuminated molecule in a condensed phase host is provided. The single molecule is illuminated with a pulse of radiation having a wavelength such that the molecule is excited to a vibrational state higher in energy than an associated excited electronic state. The molecule rapidly, incoherently and irreversibly decays, with a lifetime Tvib, from the vibrational state to the excited electronic state by transferring the corresponding vibrational energy to the host. The excited electronic state has a lifetime T, and with high probability the single molecule makes a radiative transition from this state to emit a single photon. The pump pulse duration Tp satisfies the condition Tvib<Tp<T. Room temperature operation and spectral separation of pump and single-photon radiation are thereby provided. A semiconductor nanocrystal can be used instead of a molecule.
    Type: Application
    Filed: March 4, 2004
    Publication date: November 4, 2004
    Inventors: William E. Moerner, Brahim Lounis
  • Patent number: 6798813
    Abstract: A method of minimizing contamination of optical components of a laser resonator is disclosed. The resonator components are located in an enclosure, which may contain contaminants including water vapor and organic favor released by the optical components, mounts of the optical components, or the enclosure itself. The enclosure may also contain suspended particulate matter. In order to reduce the level of these contaminants, a purging system extracts gas from the enclosure and passes the gas through a desiccant, an organic vapor trapping material, and a particulate matter filter then returns the extracted gas to the enclosure. The purging system is particularly useful for ultrafast lasers and ultraviolet lasers where the power of the laser radiation increases the probability of destabilizing reactions between laser radiation and contaminants.
    Type: Grant
    Filed: July 9, 2001
    Date of Patent: September 28, 2004
    Assignee: Coherent, Inc.
    Inventors: Yang Pang, Matthew Perry Philpott
  • Patent number: 6795464
    Abstract: A random laser system includes Critical Solution Temperature (CST) material, either a Lower CST (LCST) or an Upper CST (UCST) material, in combination with an optical gain medium, such as a laser dye. A laser-like emission is observed in response to optical pumping only when the CST material is in a scattering state. The random laser is suitable for being microencapsulated, and can be used for, as examples, remote temperature sending applications as well as for visual display applications.
    Type: Grant
    Filed: October 1, 2002
    Date of Patent: September 21, 2004
    Assignee: Spectra Systems Corporation
    Inventor: Nabil M. Lawandy
  • Publication number: 20030227953
    Abstract: A method for generating a long effective pulse duration output beam of laser radiation using a flashlamp-excited dye laser is described. A spaced series of excitation pulses is electronically generated using a pulse forming module. The series of excitation pulses are provided to a flashlamp-excited dye laser, which generates an output beam of laser radiation. The output beam is comprised of a series of spaced micropulses of laser radiation which, in combination, provide a long effective pulse duration.
    Type: Application
    Filed: December 20, 2002
    Publication date: December 11, 2003
    Applicant: Candela Corporation
    Inventors: James C. Hsia, Anthony D. Quaglia, Charles Johnson, Mike Clancy
  • Patent number: 6631147
    Abstract: An organic semiconductor laser device is composed of a positive electrode layer, an electron hole-transporting layer, a light-emitting layer containing an organic dye and having an open end, an electron-transporting layer, and a negative electrode layer in order. The electron hole-transporting layer and the electron-transporting layer satisfy the conditions of 1<n1/n2 and 1<n1/n3 (n1 is a refractive index of the light-emitting layer determined at a wavelength of the light emitted in the light-emitting layer, n2 is that of the electron hole-transporting layer, and n3 is that of the electron-transporting layer) and further satisfy the conditions; 0.
    Type: Grant
    Filed: September 14, 1999
    Date of Patent: October 7, 2003
    Assignee: Optc Co., Ltd.
    Inventors: Yoshio Taniguchi, Chihaya Adachi, Toshiki Koyama, Michifumi Nagawa
  • Publication number: 20030165174
    Abstract: A random laser system includes Critical Solution Temperature (CST) material, either a Lower CST (LCST) or an Upper CST (UCST) material, in combination with an optical gain medium, such as a laser dye. A laser-like emission is observed in response to optical pumping only when the CST material is in a scattering state. The random laser is suitable for being microencapsulated, and can be used for, as examples, remote temperature sending applications as well as for visual display applications.
    Type: Application
    Filed: October 1, 2002
    Publication date: September 4, 2003
    Applicant: Spectra Systems Corporation
    Inventor: Nabil M. Lawandy
  • Patent number: 6600766
    Abstract: A laser includes an optical cavity. A diode laser pumping device is located within the optical cavity. An aprotic lasing liquid containing neodymium rare earth ions fills the optical cavity. A circulation system that provides a closed loop for circulating the aprotic lasing liquid into and out of the optical cavity includes a pump and a heat exchanger.
    Type: Grant
    Filed: August 31, 2000
    Date of Patent: July 29, 2003
    Assignee: The Regents of the University of California
    Inventors: Earl R. Ault, Brian J. Comaskey, Thomas C. Kuklo