Patents by Inventor Kuochou Tai
Kuochou Tai 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: 10490719Abstract: Light emitting die (300) comprising a plurality of light emitting elements (310A, 310B), each having a pair of bond pads (N1,P1 and N2,P2), wherein at least two diagonally opposite bond pads of adjacent light emitting elements on a die have their facing corners truncated (330) to enable a direct diagonal coupling of a complementary pair of diagonally opposite bond pads when the die is monted on a substrate on which an interconnection pattern is formed. By enabling diagonal as well as lateral coupling of the bond pads of multiple light emitting elements of a die, the multiple light emitting elements may be arranged in a variety of series and/or parallel configurations, thereby facilitating the use of the same die at different nominal operating voltages with a single interconnect layer on the substrate upon which the die is mounted.Type: GrantFiled: October 19, 2016Date of Patent: November 26, 2019Assignee: Lumileds Holding B.V.Inventors: Wen Yu, Oleg B. Shchekin, Franklin Wall, Kuochou Tai, Mohiuddin Mala, Robert Zona, Jeffrey Kmetec, Alexander Nickel
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Publication number: 20180337315Abstract: Light emitting die (300) comprising a plurality of light emitting elements (310A, 310B), each having a pair of bond pads (N1,P1 and N2,P2), wherein at least two diagonally opposite bond pads of adjacent light emitting elements on a die have their facing corners truncated (330) to enable a direct diagonal coupling of a complementary pair of diagonally opposite bond pads when the die is monted on a substrate on which an interconnection pattern is formed. By enabling diagonal as well as lateral coupling of the bond pads of multiple light emitting elements of a die, the multiple light emitting elements may be arranged in a variety of series and/or parallel configurations, thereby facilitating the use of the same die at different nominal operating voltages with a single inter-connect layer on the substrate upon which the die is mounted.Type: ApplicationFiled: October 19, 2016Publication date: November 22, 2018Applicant: Lumileds Holding B.V.Inventors: Wen YU, Oleg B. SHCHEKIN, Franklin WALL, Kuochou TAI, Mohiuddin MALA, Robert ZONA, Jeffrey KMETEC, Alexander NICKEL
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Patent number: 9976707Abstract: A mixing optic combines a variety of features to enhance the brightness and uniformity of the light emitted from a combination of different color light emitting sources. The mixing optic may include a parabolic reflector that redirects low-angle emissions, a reflective waveguide that mixes the light spatially, and a diffuser plate that mixes the light angularly. In an embodiment, the output of the mixing optic exhibits a substantially Lambertian output pattern of a substantially uniform mix of colors, exhibiting, for example, the light output pattern of a single white light source.Type: GrantFiled: December 19, 2014Date of Patent: May 22, 2018Assignee: PHILIPS LIGHTING HOLDING B.V.Inventors: Kuochou Tai, Jeffrey Dellert Kmetec, Gregory Guth
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Patent number: 9714754Abstract: Lighting arrangement (1, 1?) comprising a light source (2) for generating light; a spreading element (3) realized to laterally spread the generated light in a spreading plane (S), defined by an optical axis (AO) of the light source (2) and a longitudinal axis (L) of the spreading element (3), to give an essentially uniform quantity of light per unit area at an emission face (41, 51) orthogonal to the spreading plane (S) and parallel to the longitudinal axis (L) of the spreading element (3) and a light redirecting element (4, 5) arranged to collect the spread light, which comprises a longitudinal planar emission face (41, 51), and is realized to collect the laterally spread light and to emit the collected light essentially uniformly from the emission face (41, 51).Type: GrantFiled: April 23, 2013Date of Patent: July 25, 2017Assignee: PHILIPS LIGHTING HOLDING B.V.Inventors: Benno Spinger, Paul Scott Martin, Pascal Jean Henri Bloemen, Kuochou Tai
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Publication number: 20160320002Abstract: A mixing optic combines a variety of features to enhance the brightness and uniformity of the light emitted from a combination of different color light emitting sources. The mixing optic may include a parabolic reflector that redirects low-angle emissions, a reflective waveguide that mixes the light spatially, and a diffuser plate that mixes the light angularly. In an embodiment, the output of the mixing optic exhibits a substantially Lambertian output pattern of a substantially uniform mix of colors, exhibiting, for example, the light output pattern of a single white light source.Type: ApplicationFiled: December 19, 2014Publication date: November 3, 2016Inventors: Kuochou TAI, Jeffrey Dellert KMETEC, Gregory GUTH
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Publication number: 20150085513Abstract: Lighting arrangement (1, 1?) comprising a light source (2) for generating light; a spreading element (3) realised to laterally spread the generated light in a spreading plane (S), defined by an optical axis (AO) of the light source (2) and a longitudinal axis (L) of the spreading element (3), to give an essentially uniform quantity of light per unit area at an emission face (41, 51) orthogonal to the spreading plane (S) and parallel to the longitudinal axis (L) of the spreading element (3) and a light redirecting element (4, 5) arranged to collect the spread light, which comprises a longitudinal planar emission face (41, 51), and is realised to collect the laterally spread light and to emit the collected light essentially uniformly from the emission face (41, 51).Type: ApplicationFiled: April 23, 2013Publication date: March 26, 2015Inventors: Benno Spinger, Paul Scott Martin, Pascal Jean Henri Bloemen, Kuochou Tai
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Patent number: 8588039Abstract: A method and system for providing a waveguide for an energy assisted magnetic recording (EAMR) transducer is described. The EAMR transducer has an air-bearing surface (ABS) that resides in proximity to a media during use and is coupled with a laser that provides energy. The EAMR transducer includes a write pole that writes to a region of the media and coil(s) that energize the write pole. The waveguide includes first and second cladding layers, a core, and assistant cores. The core is configured to direct the energy from the laser toward the ABS and has a core length. The core resides between the first and second cladding layers. A first portion of the assistant cores resides in the first cladding layer. A second portion of the assistant cores is in the second cladding layer. Each assistant core has an assistant core length less than the core length.Type: GrantFiled: March 2, 2011Date of Patent: November 19, 2013Assignee: Western Digital (Fremont), LLCInventors: Zhong Shi, Kuochou Tai, Shing Lee
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Publication number: 20080144997Abstract: A thermally stable small optical package is disclosed housing optically aligned elements forming an optical component. The elements are all directly soldered to a base member or directly soldered to a supporting member soldered to a common base member. The sealed container has a supporting base member of stainless steel and a first optical fiber mount is directly soldered to the supporting base. A first optical fiber is directly soldered to the upper end of the first optical fiber mount. A similar arrangement is provided wherein a second optical fiber mount is directly soldered to the base and a second optical fiber is directly soldered to the upper end of the second optical fiber mount. A frequency doubling crystal is directly soldered to the stainless steel base member after being aligned with the two optical fibers. This design is inexpensive to manufacture and provides a thermally stable component.Type: ApplicationFiled: December 10, 2007Publication date: June 19, 2008Applicant: JDS Uniphase CorporationInventors: Kuochou Tai, Andre Wong
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Publication number: 20070223552Abstract: The invention relates to high power semiconductor lasers based on a laser diode array waveguide grating (DAWG) in which the wavelength is stabilized using an array waveguide grating (AWG) in an external cavity configuration. Another aspect of the present invention relates to techniques for efficiently coupling optical gain element arrays to an AWG. Another feature provides for the efficient and brightness-conserving combination of multiple high power DAWG lasers into a single output.Type: ApplicationFiled: November 17, 2006Publication date: September 27, 2007Applicant: JDS Uniphase CorporationInventors: Martin Muendel, David Dougherty, Matthew Peters, Victor Rossin, Robert Sargent, Len Marabella, Kuochou Tai, Bruno Acklin, Yongan Wu, Kenneth Dzurko
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Patent number: 7058304Abstract: Wavelength interleaving cross-connects pass a first optical signal including a first set of optical frequencies in a first direction and a second optical signal including a second set of optical frequencies in a second direction. In one embodiment, the first optical signal, when input to a first input/output (I/O) port, is routed from the first I/O port to a third I/O port. The first optical signal, when input to a fourth I/O port, is routed from the fourth port to a second I/O port. The second optical signal, when input to the second I/O port, is routed from the second I/O port to the third I/O port. The second optical signal, when input to the fourth I/O port, is routed from the fourth I/O port to the first I/O port. Thus, by coupling an optical device (e.g., amplifier, filter) between the third port and the fourth port, the optical device can be used for bi-directional communications thereby reducing the number of devices required for a bi-directional optical network architecture.Type: GrantFiled: August 20, 2001Date of Patent: June 6, 2006Assignee: JDS Uniphase CorporationInventors: Kuochou Tai, Kok-Wai Chang, Jyehong Chen
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Patent number: 6969205Abstract: A fiber tail assembly (FTA) with a micro-lens formed in the fiber tip is used to couple the laser light out of the package and along the fiber. The FTA is soldered at two points where metallized bands are deposited on the fiber pigtail, one at a fiber mount near the diode where it can be soldered into alignment with the laser diode, and two at the snout which forms a feed through the housing and seal for the package. Typically, the FTA is metallized along its entire length within the package. In this invention the two-metallized bands are separated by a region that is unmetallized.Type: GrantFiled: December 4, 2003Date of Patent: November 29, 2005Assignee: JDS Uniphase CorporationInventors: Richard L. Duesterberg, Edmund L. Wolak, Marc K. Von Gunten, Nina Morozova, Donald C. Hargreaves, Prasad Yalamanchili, Hilary Clarke, Jay A. Skidmore, Lei Xu, Christopher L. Hart, William Bardy, Jeffrey Zack, Kuochou Tai
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Patent number: 6932520Abstract: The invention relates to optical modules for use in larger electro-optic components, such as erbium doped fiber amplifiers. One aspect of the invention relates to the optical module including input and/or output fiber tube ferrules surrounded by glass mounting sleeves secured to a metal housing using a suitable adhesive. Preferably, the optical module includes one or more optical elements, such as isolators, WDM filters and beam splitters, for effecting light traveling therethrough before entering or exiting a main housing of the electro-optic component. Another aspect of the invention relates to the electro-optic component including the main housing with gaps in the outer wall thereof for receiving the optical modules. Preferably, the optical component includes an electro-optical system including lasers, erbium doped fiber, an integrated circuit board and controller hardware.Type: GrantFiled: February 3, 2003Date of Patent: August 23, 2005Assignee: JDS Uniphase CorporationInventors: Kuochou Tai, Warren Hale Lewis, Long Yang
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Publication number: 20050074217Abstract: A fiber tail assembly (FTA) with a micro-lens formed in the fiber tip is used to couple the laser light out of the package and along the fiber. The FTA is soldered at two points where metallized bands are deposited on the fiber pigtail, one at a fiber mount near the diode where it can be soldered into alignment with the laser diode, and two at the snout which forms a feed through the housing and seal for the package. Typically, the FTA is metallized along its entire length within the package. In this invention the two-metallized bands are separated by a region that is unmetallized.Type: ApplicationFiled: December 4, 2003Publication date: April 7, 2005Applicant: JDS Uniphase CorporationInventors: Richard Duesterberg, Edmund Wolak, Marc Gunten, Nina Morozova, Donald Hargreaves, Prasad Yalamanchili, Hilary Clarke, Jay Skidmore, Lei Xu, Christopher Hart, William Bardy, Jeffrey Zack, Kuochou Tai
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Patent number: 6804467Abstract: A method and device is disclosed for dispersion compensation of an optical signal having periodic dispersion within a multi-channels system. For example interleaved optical channels often exhibit dispersion having a characteristic that is repeated in adjacent channels. By providing a periodic device that allows for polarization dependent routing of an interleaved signal to allow for multiple passes of said signal through a multi-cavity GT etalon, having a free-spectral range that corresponds to the channel spacing, the dispersion in the interleaved signal can be lessened and practically obviated or balanced to a desired level. This invention provides a device and method to achieve that end.Type: GrantFiled: April 3, 2001Date of Patent: October 12, 2004Assignees: JDS Uniphase Inc., JDS Uniphase CorporationInventors: Paul Colbourne, Kuochou Tai, Jyehong Chen, Kok Wai Chang
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Publication number: 20040184148Abstract: A multimode laser beam depolarization and combining architecture integrates a combiner for polarized multimode light beams with a multimode beam depolarizer, that produces a composite depolarized output beam optimized for application to a Raman optical amplifier. A high-order depolarizing 45° waveplate is used to effectively depolarize multimode laser beams produced by a Fabry-Perot (FP) laser. The high-order 45° waveplate has a length that achieves multi mode dispersion-dependent depolarization of the beam over its travel path through the crystal, and may comprise a birefringent material such as YVO4 having a large difference between its extraordinary and ordinary indices of refraction.Type: ApplicationFiled: February 25, 2004Publication date: September 23, 2004Applicants: JDS UNIPHASE CORPORATION, JDS UNIPHASE INC.Inventors: Kok-Wai Chang, Jyehong Chen, Kuochou Tai, Gonzalo Wills
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Publication number: 20040151444Abstract: The invention relates to optical modules for use in larger electro-optic components, such as erbium doped fiber amplifiers. One aspect of the invention relates to the optical module including input and/or output fiber tube ferrules surrounded by glass mounting sleeves secured to a metal housing using a suitable adhesive. Preferably, the optical module includes one or more optical elements, such as isolators, WDM filters and beam splitters, for effecting light traveling therethrough before entering or exiting a main housing of the electro-optic component. Another aspect of the invention relates to the electro-optic component including the main housing with gaps in the outer wall thereof for receiving the optical modules. Preferably, the optical component includes an electro-optical system including lasers, erbium doped fiber, an integrated circuit board and controller hardware.Type: ApplicationFiled: February 3, 2003Publication date: August 5, 2004Applicant: JDS Uniphase CorporationInventors: Kuochou Tai, Warren Hale Lewis, Long Yang
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Patent number: 6765679Abstract: Interleavers, based on a Michelson interferometer with a Gires-Tournois (GT) etalon in each arm, are becoming popular in the filtering of light in the fiber optics telecommunications industry. As the channel spacing becomes closer together, e.g. 50 GHz or 25 GHz, dispersion compensation becomes an important factor in the choice and design of a system. The present invention solves the problem of increased chromatic dispersion by utilizing multi-cavity Gires-Tournois (MCGT) etalons, wherein the dispersion from one MCGT is used to compensate or cancel the dispersion from the other MCGT. In an optimum design for a dual cavity GT etalon, the dispersion profile of the first MCGT will have a similar amplitude and frequency as the dispersion profile of the second MCGT, only shifted by half the period so that the positive slopes of one profile are aligned with the negative slopes of the other profile.Type: GrantFiled: May 20, 2002Date of Patent: July 20, 2004Assignee: JDS Uniphase CorporationInventors: Thomas Ducellier, Kuochou Tai, Marie-Josee Picard
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Patent number: 6757451Abstract: An optical circulator with a first, second, third, and fourth port. The second and third port are disposed to receive polarized light entering the circulator as unpolarized light from the first port. The fourth port is disposed to receive unpolarized light entering the circulator as polarized light from the second and third port. The circulator comprises a beam-splitting and -combining element for separating and combining mutually orthogonal polarizations and a non-reciprocal polarization rotator. The circulator can be used to furnish light of a desired predetermined polarization for polarization-dependent devices.Type: GrantFiled: February 25, 2002Date of Patent: June 29, 2004Assignee: JDS Uniphase CorporationInventors: Kok-Wai Chang, Kuochou Tai, Jyehong Chen, Qingdong Quo
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Patent number: 6697198Abstract: Interleaver/deinterleaver apparatuses for combining/separating optical channels are described. When operating as a deinterleaver, the interleaver/deinterleaver separates an optical signal (e.g. WDM signal) into subsets of optical signals (e.g. channels). In one embodiment, deinterleaving optical signals separates an optical signal into even and odd International Telecommunications Union (ITU) channels. The interleaver/deinterleavers may include isolator components to route optical signals to and from input/output ports. A variety of reflective elements, e.g. quarter wave mirrors, reflective prisms, etalons, can be used for double passing the signals through a birefringent crystal assembly.Type: GrantFiled: October 23, 2001Date of Patent: February 24, 2004Assignee: JDS Uniphase CorporationInventors: Kuochou Tai, Kok-Wai Chang, Jyehong Chen, Hongwei Mao
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Patent number: 6690513Abstract: Interleavers are a useful tool in wavelength division multiplexing (WDM) to separate a signal with closely spaced channels into two signals, e.g. odd and even ITU channels, each with twice the channel spacing. Alternatively, two signals with a large channel spacing can be combined into a single beam with half the channel spacing. The invention relates to an optical interferometer using rhomb prisms as resonant cavities, which, when properly designed, provide the necessary phase shifts for interleaving or de-interleaving sets of optical wavelength channels. The present invention utilizes the differential phase shift between orthogonally polarized components induced by total internal reflection (TIR) off the surfaces of the rhomb prisms. Dispersion reducing techniques are also disclosed, including multiple rhomb interleavers and multi-pass rhomb interleavers.Type: GrantFiled: June 27, 2002Date of Patent: February 10, 2004Assignee: JDS Uniphase CorporationInventors: Charles Andrew Hulse, Michael R. Greenberg, Kuochou Tai