Patents by Inventor Sze-Keung Kwong
Sze-Keung Kwong 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: 9865993Abstract: A beam control structure for semiconductor lasers that allows modification of the shape of a beam allowing, for example, higher coupling into an optical fiber. The structure may comprise one or more of a tilted patio, a staircase, a reflective roof, and a reflective sidewall.Type: GrantFiled: May 20, 2016Date of Patent: January 9, 2018Assignee: MACOM TECHNOLOGY SOLUTIONS HOLDINGS, INC.Inventors: Cristian Stagarescu, Alex A. Behfar, Norman Sze-keung Kwong
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Patent number: 9859687Abstract: A beam control structure for semiconductor lasers that allows modification of the shape of a beam allowing, for example, higher coupling into an optical fiber. The structure may comprise one or more of a tilted patio, a staircase, a reflective roof, and a reflective sidewall.Type: GrantFiled: May 20, 2016Date of Patent: January 2, 2018Assignee: MACOM TECHNOLOGY SOLUTIONS HOLDINGS, INC.Inventors: Cristian Stagarescu, Alex A. Behfar, Norman Sze-keung Kwong
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Patent number: 9692202Abstract: A reflective surface is disclosed in conjunction with a semiconductor laser to shape a laser beam and modify a direction of the laser beam. The reflective surface may be formed on a structure disposed adjacent to a laser structure to allow high coupling of laser light to, for example, a silicon photonics chip or an optical fiber.Type: GrantFiled: November 7, 2014Date of Patent: June 27, 2017Assignee: MACOM TECHNOLOGY SOLUTIONS HOLDINGS, INC.Inventors: Alex A. Behfar, Cristian Stagarescu, Norman Sze-keung Kwong
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Publication number: 20160285239Abstract: A beam control structure for semiconductor lasers that allows modification of the shape of a beam allowing, for example, higher coupling into an optical fiber. The structure may comprise one or more of a tilted patio, a staircase, a reflective roof, and a reflective sidewall.Type: ApplicationFiled: May 20, 2016Publication date: September 29, 2016Applicant: M/A-COM Technology Solutions Holdings, Inc.Inventors: Cristian STAGARESCU, Alex A. BEHFAR, Norman Sze-keung KWONG
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Publication number: 20160268769Abstract: A beam control structure for semiconductor lasers that allows modification of the shape of a beam allowing, for example, higher coupling into an optical fiber. The structure may comprise one or more of a tilted patio, a staircase, a reflective roof, and a reflective sidewall.Type: ApplicationFiled: May 20, 2016Publication date: September 15, 2016Applicant: M/A-COM Technology Solutions Holdings, Inc.Inventors: Cristian STAGARESCU, Alex A. BEHFAR, Norman Sze-keung KWONG
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Patent number: 9401582Abstract: A beam control structure for semiconductor lasers that allows modification of the shape of a beam allowing, for example, higher coupling into an optical fiber. The structure may comprise one or more of a tilted patio, a staircase, a reflective roof, and a reflective sidewall.Type: GrantFiled: May 7, 2013Date of Patent: July 26, 2016Assignee: M/A-COM TECHNOLOGY SOLUTIONS HOLDINGS, INC.Inventors: Cristian Stagarescu, Alex A. Behfar, Norman Sze-keung Kwong
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Publication number: 20150124846Abstract: A reflective surface is disclosed in conjunction with a semiconductor laser to shape a laser beam and modify a direction of the laser beam. The reflective surface may be formed on a structure disposed adjacent to a laser structure to allow high coupling of laser light to, for example, a silicon photonics chip or an optical fiber.Type: ApplicationFiled: November 7, 2014Publication date: May 7, 2015Applicant: BinOptics CorporationInventors: Alex A. BEHFAR, Cristian STAGARESCU, Norman Sze-keung KWONG
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Publication number: 20130301666Abstract: A beam control structure for semiconductor lasers that allows modification of the shape of a beam allowing, for example, higher coupling into an optical fiber. The structure may comprise one or more of a tilted patio, a staircase, a reflective roof, and a reflective sidewall.Type: ApplicationFiled: May 7, 2013Publication date: November 14, 2013Applicant: BINOPTICS CORPORATIONInventors: Cristian STAGARESCU, Alex A. BEHFAR, Norman Sze-keung KWONG
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Patent number: 5127072Abstract: A small module for converting an electrical signal to a modulated light signal on an optical fiber comprises a housing, a laser mounted on a laser substrate within the housing, a GRIN lens and an optical isolator downstream from the laser, and a precision capillary for holding an optical fiber downstream from the optical isolator. The relative positions of the laser, lens, optical isolator and fiber are adjusted to maximize light output through the fiber. The optical fiber is sealed to the housing at one point and is free to move axially in the capillary for minimizing mechanical stress on the fiber.Type: GrantFiled: March 8, 1990Date of Patent: June 30, 1992Assignee: Ortel CorporationInventors: Henry A. Blauvelt, Sze-Keung Kwong, Ching-Jong Lii, Ronald S. Moeller, Israel Ury
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Patent number: 4843611Abstract: A buried heterostructure window device has an elongated layer of gain medium surrounded by a lower index of refraction medium for guiding light along the length of the gain medium. A window and an antireflective layer are deposited on the output end of the gain layer to minimize reflections. A portion of the gain medium nearer the output end of the device is electrically pumped, leaving an unpumped end of the gain medium remote from the output end. The unpumped portion of the gain medium absorbs light travelling along the length of the gain medium. This inhibits reflection from the end of the gain medium remote from the output end. When the device is pumped with a moderate power level, strong superluminescent output is obtained. When the device is pumped well above the lasing threshold by reason of "burning through" the unpumped absorbing portion of the gain medium, a single mode laser is obtained with side band power at least 20 db below the power of the principal oscillation mode.Type: GrantFiled: August 12, 1988Date of Patent: June 27, 1989Assignee: Ortel CorporationInventors: Sze-Keung Kwong, Kam Y. Lau, Nadav Bar-Chaim, Israel Ury
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Patent number: 4803429Abstract: The tensorial nature of the nonlinear constant or the electro-optic coefficient of the phase conjugate material makes it impossible to perform true phase conjugation of fields with arbitrary polarization states, i.e., to recover the polarization state of the incident light of arbitrary polarization after the phase conjugation. It is demonstrated here that an optical wave propagating through a polarization and mode scrambling medium can regain its original polarization state after phase conjugation followed by reverse propagation through the polarization and mode scrambling medium. Such polarization recovery is achieved even while a magnetic field is applied to the medium, but with power loss proportional to the magnitude of the magnetic field.Type: GrantFiled: September 15, 1986Date of Patent: February 7, 1989Assignee: California Institute of TechnologyInventors: Kazuo Kyuma, Sze-Keung Kwong, Amnon Yariv
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Patent number: 4764934Abstract: A buried heterostructure window device has an elongated layer of gain medium surrounded by a lower index of refraction medium of guiding light along the length of the gain medium. A window and an antireflective layer are deposited on the output end of the gain layer to minimize reflections. A portion of the gain medium nearer the output end of the device is electrically pumped, leaving an unpumped end of the gain medium remote from the output end. The unpumped portion of the gain medium absorbs light travelling along the length of the gain medium. This inhibits reflection from the end of the gain medium remote from the output end. When the device is pumped with a moderate power level, strong superluminescent output is obtained. When the device is pumped well above the lasing threshold by reason of "burning through" the unpumped absorbing portion of the gain medium, a single mode laser is obtained with side band power at least 20 db below the power of the principal oscillation mode.Type: GrantFiled: July 27, 1987Date of Patent: August 16, 1988Assignee: Ortel CorporationInventors: Sze-Keung Kwong, Kam Y. Lau, Nadav Bar-Chaim, Israel Ury
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Patent number: 4762394Abstract: Real time "exclusive or" operation, image subtraction, intensity inversion, and first- and second-order differentiation is achieved by an interferometer with a phase conjugate mirror for retroreflection of two or more beams derived from a single beam by a beam splitter and recombined interferometrically by the beam splitter.Type: GrantFiled: June 16, 1986Date of Patent: August 9, 1988Assignee: California Institute of TechnologyInventors: Sze-Keung Kwong, George A. Rakuljic, Victor Leyva, Amnon Yariv