Patents by Inventor Leslie Brandon Shaw
Leslie Brandon Shaw has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9213215Abstract: A method of generating a supercontinuum in chalcogenide fiber with a pump light comprising a short pulse fiber laser or diode laser operating with a wavelength of 1.0 ?m or greater that is wavelength shifted through a nonlinear fiber one or more times and amplified one or more times and launched into a chalcogenide fiber whereby the spectrum is broadened in the chalcogenide fiber through various nonlinear processes to generate a supercontinuum within the mid-IR from 1.5 to greater than 5 ?m.Type: GrantFiled: January 16, 2013Date of Patent: December 15, 2015Assignee: The United States of America, as represented by the Secretary of the NavyInventors: Leslie Brandon Shaw, Rafael R. Gattass, Jasbinder S. Sanghera, Ishwar D. Aggarwal
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Patent number: 9207398Abstract: An optical fiber comprising non-silica, specialty glass that has multiple fiber cores arranged in a square registered array. The fiber cores are “registered” meaning that the array location of any fiber core is constant throughout the entire length of the fiber, including both ends. Optical fiber bundles are fabricated by combining multiple multi-core IR fibers with square-registration. Also disclosed is the related method for making the optical fiber.Type: GrantFiled: June 27, 2013Date of Patent: December 8, 2015Assignee: The United States of America, as represented by the Secretary of the NavyInventors: Daniel J. Gibson, Jasbinder S. Sanghera, Leslie Brandon Shaw, Ishwar D. Aggarwal
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Publication number: 20150340831Abstract: Fiber optic amplification in a spectrum of infrared electromagnetic radiation is achieved by creating a chalcogenide photonic crystal fiber (PCF) structure having a radially varying pitch. A chalcogenide PCF system can be tuned during fabrication of the chalcogenide PCF structure, by controlling, the size of the core, the size of the cladding, and the hole size to pitch ratio of the chalcogenide PCF structure and tuned during exercising of the chalcogenide PCF system with pump laser and signal waves, by changing the wavelength of either the pump laser wave or the signal wave, maximization of nonlinear conversion of the chalcogenide PCF, efficient parametric conversion with low peak power pulses of continuous wave laser sources, and minimization of power penalties and minimization of the need for amplification and regeneration of pulse transmissions over the length of the fiber, based on a dispersion factor.Type: ApplicationFiled: July 31, 2015Publication date: November 26, 2015Applicant: The Government of the US, as represented by the Secretary of the NavyInventors: Leslie Brandon Shaw, Jasbinder S. Sanghera, Ishwar D. Aggarwal, Daniel J. Gibson, Frederic H. Kung
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Patent number: 9099835Abstract: Fiber optic amplification in a spectrum of infrared electromagnetic radiation is achieved by creating a chalcogenide photonic crystal fiber (PCF) structure having a radially varying pitch. A chalcogenide PCF system can be tuned during fabrication of the chalcogenide PCF structure, by controlling, the size of the core, the size of the cladding, and the hole size to pitch ratio of the chalcogenide PCF structure and tuned during exercising of the chalcogenide PCF system with pump laser and signal waves, by changing the wavelength of either the pump laser wave or the signal wave, maximization of nonlinear conversion of the chalcogenide PCF, efficient parametric conversion with low peak power pulses of continuous wave laser sources, and minimization of power penalties and minimization of the need for amplification and regeneration of pulse transmissions over the length of the fiber, based on a dispersion factor.Type: GrantFiled: July 19, 2009Date of Patent: August 4, 2015Assignee: The United States of America, as represented by the Secretary of the NavyInventors: Leslie Brandon Shaw, Ishwar Dayal Aggarwal, Jasbinder Singh Sanghera, Daniel Joseph Gibson, Frederic Hau Kung
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Patent number: 8929695Abstract: An N port fiber optical switch includes a movable housing having a perimeter and N corners; a plurality N of optical fibers positioned within the housing and inside the perimeter; and a plurality N of actuators, wherein each actuator is positioned on a corresponding corner such that when selectively activated one or more of the actuators urges the movable housing and the plurality of optical fibers to a selected switch position. The switch provides short switching times and high power handling while allowing for a large number of ports and provides the capability of interfacing with and switching between a variable number of ports.Type: GrantFiled: November 8, 2012Date of Patent: January 6, 2015Assignee: The United States of America, as represented by the Secretary of the NavyInventors: Rafael Gattass, Frederic H. Kung, Leslie Brandon Shaw, Ishwar D. Aggarwal, Jasbinder S. Sanghera, Lynda E Busse
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Patent number: 8710470Abstract: An infrared laser source system that combines laser emitters through an optical waveguide. Each emitter is coupled to a port of the optical waveguide and the waveguided signal is combined to provide a spatially combined laser source with a single common exit aperture. The materials used for waveguiding allow the propagation of wavelengths in the infrared. The system can be used for combining multiple laser emitters to increase the total output power and/or for combination of multiple emitters with different wavelength for increased spectral coverage out of the laser system.Type: GrantFiled: July 11, 2013Date of Patent: April 29, 2014Assignee: The United States of America, as represented by the Secretary of the NavyInventors: Rafael R. Gattass, Leslie Brandon Shaw, Jasbinder S. Sanghera, Ishwar D. Aggarwal, Lynda E Busse
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Publication number: 20140098411Abstract: A method for making a rare earth doped polycrystalline ceramic laser gain medium by hot pressing a rare earth doped polycrystalline powder where the doping concentration is greater than 2% and up to 10% and where the grain size of the final ceramic is greater than 2 ?m. The polycrystalline powder can be Lu2O3, Y2O3, or Sc2O3, and the rare earth dopant can be Yb3+, Er3+, Tm3+, or Ho3+. Also disclosed is the related rare earth doped polycrystalline ceramic laser gain medium prepared by this method.Type: ApplicationFiled: September 28, 2012Publication date: April 10, 2014Inventors: Woohong Kim, Guillermo R. Villalobos, Colin C. Baker, Jesse A. Frantz, Leslie Brandon Shaw, Bryan Sadowski, Jasbinder S. Sanghera, Ishwar D. Aggarwal
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Patent number: 8665915Abstract: A laser apparatus uses a dysprosium doped chalcogenide glass fiber. The glass fiber has a laser pump operatively connected to it. The chalcogenide glass fiber is located in a laser cavity including one or more reflective elements such as a Bragg grating, a Bragg minor, a grating, and a non-doped fiber end face. The apparatus provides laser light output at a wavelength of about 4.3 ?m to about 5.0 ?m at a useful power level using laser light input at a wavelength of from about 1.7 ?m to about 1.8 ?m. Also disclosed is a method for providing laser light output at a wavelength of about 4.3 ?m to about 5.0 ?m using the apparatus of the invention.Type: GrantFiled: September 30, 2011Date of Patent: March 4, 2014Assignee: The United States of America, as represented by the Secretary of the NavyInventors: Leslie Brandon Shaw, Jasbinder S. Sanghera, Shyam S. Bayya, Ishwar D. Aggarwal
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Publication number: 20140014858Abstract: An infrared laser source system that combines laser emitters through an optical waveguide. Each emitter is coupled to a port of the optical waveguide and the waveguided signal is combined to provide a spatially combined laser source with a single common exit aperture. The materials used for waveguiding allow the propagation of wavelengths in the infrared. The system can be used for combining multiple laser emitters to increase the total output power and/or for combination of multiple emitters with different wavelength for increased spectral coverage out of the laser system.Type: ApplicationFiled: July 11, 2013Publication date: January 16, 2014Inventors: Rafael R. Gattass, Leslie Brandon Shaw, Jasbinder S. Sanghera, Ishwar D. Aggarwal, Lynda E. Busse
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Publication number: 20140003776Abstract: An optical fiber comprising non-silica, specialty glass that has multiple fiber cores arranged in a square registered array. The fiber cores are “registered” meaning that the array location of any fiber core is constant throughout the entire length of the fiber, including both ends. Optical fiber bundles are fabricated by combining multiple multi-core IR fibers with square-registration. Also disclosed is the related method for making the optical fiber.Type: ApplicationFiled: June 27, 2013Publication date: January 2, 2014Inventors: Daniel J. Gibson, Jasbinder S. Sanghera, Leslie Brandon Shaw, Ishwar D. Aggarwal
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Patent number: 8571371Abstract: A method and apparatus for making a substantially void-free preform for a microstructured optical fiber using a one-step process is provided. A preform is prepared from specialty glasses using a direct extrusion method. A die for use with the direct extrusion method is also provided, and a method for drawing the preform into a HC-PBG fiber for use in transmitting infra-red wavelength light is also provided. The preform comprises an outer jacket made of solid glass, a cladding having a plurality of air holes arranged in a desired pattern within the jacket, and a core which is hollow.Type: GrantFiled: June 15, 2011Date of Patent: October 29, 2013Assignee: The United States of America as represented by the Secretary of the NavyInventors: Daniel J. Gibson, Jasbinder S. Sanghera, Frederic H. Kung, Pablo C Pureza, Robert E Miklos, Guillermo R. Villalobos, Leslie Brandon Shaw, Ishwar D. Aggarwal
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Publication number: 20130188660Abstract: A method of generating ultrashort pulses with wavelengths greater than 2 ?m comprising a short pulse diode laser or fiber laser operating at a wavelength of 1 ?m or greater with a pulse width of 10 ps or greater, one or more amplification stages to increase the peak power of the pulsed source, a nonlinear fiber stage whereby the dispersion of the nonlinear fiber is anomalous at the pulsed source wavelength such that the fiber breaks up the pulse into a series of sub-ps pulse train through modulation instability which may be seeded by spontaneous noise which are then wavelength shifted in one or more stages by soliton self frequency shift in anomalous dispersion fiber or Raman in normal dispersion fiber and amplified in one or more stages to generate a high peak power ultrashort pulse (<1 ps) source at a wavelength of 2.4 ?m or greater.Type: ApplicationFiled: January 16, 2013Publication date: July 25, 2013Inventors: Leslie Brandon Shaw, Rafael R. Gattass, Jasbinder S. Sanghera, Ishwar D. Aggarwal
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Publication number: 20130188240Abstract: A method of generating a supercontinuum in chalcogenide fiber with a pump light comprising a short pulse fiber laser or diode laser operating with a wavelength of 1.0 ?m or greater that is wavelength shifted through a nonlinear fiber one or more times and amplified one or more times and launched into a chalcogenide fiber whereby the spectrum is broadened in the chalcogenide fiber through various nonlinear processes to generate a supercontinuum within the mid-IR from 1.5 to greater than 5 ?m.Type: ApplicationFiled: January 16, 2013Publication date: July 25, 2013Inventors: Leslie Brandon Shaw, Rafael R. Gattass, Jasbinder S. Sanghera, Ishwar D. Aggarwal
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Publication number: 20130083402Abstract: An optical system having two or more different optical elements with a corresponding interface between the optical elements. At least one of the optical elements has an anti-reflective structure that is transferred to the interface between two optical elements, typically by embossing. Also disclosed is the related method for making the optical system.Type: ApplicationFiled: September 28, 2012Publication date: April 4, 2013Inventors: Jasbinder S. Sanghera, Catalin M. Florea, Leslie Brandon Shaw, Lynda E. Busse, Ishwar D. Aggarwal, Steven R. Bowman
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Publication number: 20130083812Abstract: A laser apparatus uses a dysprosium doped chalcogenide glass fiber. The glass fiber has a laser pump operatively connected to it. The chalcogenide glass fiber is located in a laser cavity including one or more reflective elements such as a Bragg grating, a Bragg minor, a grating, and a non-doped fiber end face. The apparatus provides laser light output at a wavelength of about 4.3 ?m to about 5.0 ?m at a useful power level using laser light input at a wavelength of from about 1.7 ?m to about 1.8 ?m. Also disclosed is a method for providing laser light output at a wavelength of about 4.3 ?m to about 5.0 ?m using the apparatus of the invention.Type: ApplicationFiled: September 30, 2011Publication date: April 4, 2013Inventors: Leslie Brandon Shaw, Jasbinder S. Sanghera, Shyam S. Bayya, Ishwar D. Aggarwal
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Publication number: 20120321263Abstract: A method and apparatus for making a substantially void-free preform for a microstructured optical fiber using a one-step process is provided. A preform is prepared from specialty glasses using a direct extrusion method. A die for use with the direct extrusion method is also provided, and a method for drawing the preform into a HC-PBG fiber for use in transmitting infra-red wavelength light is also provided. The preform comprises an outer jacket made of solid glass, a cladding having a plurality of air holes arranged in a desired pattern within the jacket, and a core which is hollow.Type: ApplicationFiled: June 15, 2011Publication date: December 20, 2012Inventors: DANIEL J. GIBSON, Jasbinder S. Sanghera, Frederic H. Kung, Pablo C. Pureza, Robert E. Miklos, Guillermo R. Villalobos, Leslie Brandon Shaw, Ishwar D. Aggarwal
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Publication number: 20120119146Abstract: A transparent polycrystalline ceramic having scattering and absorption loss less than 0.2/cm over a region comprising more than 95% of the originally densified shape and a process for fabricating the same by hot pressing. The ceramic can be any suitable ceramic such as yttria (Y2O3) or scandia (Sc2O3) and can have a doping level of from 0 to 20% and a grain size of greater than 30 ?m, although the grains can also be smaller than 30 ?m. Ceramic nanoparticles can be coated with a sintering aid to minimize direct contact of adjacent ceramic powder particles and then baked at high temperatures to remove impurities from the coated particles. The thus-coated particles can then be densified by hot pressing into the final ceramic product. The invention further provides a transparent polycrystalline ceramic solid-state laser material and a laser using the hot pressed polycrystalline ceramic.Type: ApplicationFiled: January 13, 2012Publication date: May 17, 2012Applicant: The Government of the United States of America, as represented by the Secretary of the NavyInventors: Jasbinder S. Sanghera, Guillermo R. Villalobos, Woohong Kim, Shyam S. Bayya, Bryan Sadowski, Jesse A. Frantz, Leslie Brandon Shaw, Ishwar D. Aggarwal
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Publication number: 20120119147Abstract: A transparent polycrystalline ceramic having scattering and absorption loss less than 0.2/cm over a region comprising more than 95% of the originally densified shape and a process for fabricating the same by hot pressing. The ceramic can be any suitable ceramic such as yttria (Y2O3) or scandia (Sc2O3) and can have a doping level of from 0 to 20% and a grain size of greater than 30 although the grains can also be smaller than 30 ?m. Ceramic nanoparticles can be coated with a sintering aid to minimize direct contact of adjacent ceramic powder particles and then baked at high temperatures to remove impurities from the coated particles. The thus-coated particles can then be densified by hot pressing into the final ceramic product. The invention further provides a transparent polycrystalline ceramic solid-state laser material and a laser using the hot pressed polycrystalline ceramic.Type: ApplicationFiled: January 13, 2012Publication date: May 17, 2012Applicant: The Government of the United States of America, as represented by the Secretary of the NavyInventors: Jasbinder S. Sanghera, Guillermo R. Villalobos, Woohong Kim, Shyam S. Bayya, Bryan Sadowski, Jesse A. Frantz, Leslie Brandon Shaw, Ishwar D. Aggarwal
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Patent number: 8144392Abstract: A waveguide amplifier, disposed on a substrate, composed of sputtered film of chalcogenide glass doped with Erbium is disclosed. The amplifier includes a substrate, a thick film of chalcogenide glass disposed on the substrate, a pumping device, and an optical combining device, wherein the waveguide is operable to amplify the optically combined signal. This type of amplifier has been shown to be compact and cost-effective, in addition to being transparent in the mid-IR range as a result of the low phonon energy of chalcogenide glass.Type: GrantFiled: February 12, 2007Date of Patent: March 27, 2012Assignee: The United States of America as represented by the Secretary of the NavyInventors: Jasbinder S Sanghera, Ishwar D Aggarwal, Jesse A. Frantz, Leslie Brandon Shaw
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Patent number: 7978738Abstract: A wavelength converter comprising an arsenic sulfide (As—S) chalcogenide glass fiber coupled to an optical parametric oscillator (OPO) crystal and a laser system using an OPO crystal coupled to an As—S fiber are provided. The OPO receives pump laser radiation from a pump laser and emits laser radiation at a wavelength that is longer than the pump laser radiation. The laser radiation that is emitted from the OPO is input into the As—S fiber, which in turn converts the input wavelength from the OPO to a desired wavelength, for example, a wavelength beyond about 4.4 ?m. In an exemplary embodiment, the OPO comprises a periodically poled lithium niobate (PPLN) crystal. The As—S fiber can include any suitable type of optical fiber, such as a conventional core clad fiber, a photonic crystal fiber, or a microstructured fiber.Type: GrantFiled: June 3, 2010Date of Patent: July 12, 2011Assignee: The United States of America as represented by the Secretary of the NavyInventors: Leslie Brandon Shaw, Jasbinder S. Sanghera, Ishwar D. Aggarwal