Patents Assigned to Lightwaves 2020, Inc.
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Patent number: 9244266Abstract: A tunable optical filter is formed in the structure of an etalon. A thin electro-optic ceramic substrate is fixed between two end substrates. Each end substrate has an inner parallel surface toward said electro-optic ceramic substrate covered by an electrode layer and a reflecting layer. An adhesive which attaches the electro-optic ceramic substrate to each first and second end substrates has a consistency so as to avoid stress on the electro-optic ceramic substrate. A voltage imposed on the electro-optic ceramic substrate by the electrode layers on the inner parallel surfaces of the first and second end substrates effectively controls an optical distance between the reflective coating layers on the inner parallel surfaces of the first and second end substrates of the etalon structure. The electro-optic ceramic substrate is preferably PMN-PT ((1?x)Pb (Mg? Nb?) O3-x—Pb Ti O3) and no more than 160 ?m thick.Type: GrantFiled: December 3, 2014Date of Patent: January 26, 2016Assignee: Lightwaves 2020, Inc.Inventor: Jing-Jong Pan
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Patent number: 8934164Abstract: A tunable optical filter is formed in the structure of an etalon. A thin electro-optic ceramic substrate is fixed between two end substrates. Each end substrate has an inner parallel surface toward said electro-optic ceramic substrate covered by an electrode layer and a reflecting layer. An adhesive which attaches the electro-optic ceramic substrate to each first and second end substrates has a consistency so as to avoid stress on the electro-optic ceramic substrate. A voltage imposed on the electro-optic ceramic substrate by the electrode layers on the inner parallel surfaces of the first and second end substrates effectively controls an optical distance between the reflective coating layers on the inner parallel surfaces of the first and second end substrates of the etalon structure. The electro-optic ceramic substrate is preferably PMN-PT ((1-x)Pb(Mg?Nb?)O3-x—PbTiO3) and no more than 160 ?m thick.Type: GrantFiled: August 14, 2013Date of Patent: January 13, 2015Assignee: Lightwaves 2020, Inc.Inventor: Jing-Jong Pan
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Publication number: 20140204443Abstract: A tunable optical filter is formed in the structure of an etalon. A thin electro-optic ceramic substrate is fixed between two end substrates. Each end substrate has an inner parallel surface toward said electro-optic ceramic substrate covered by an electrode layer and a reflecting layer. An adhesive which attaches the electro-optic ceramic substrate to each first and second end substrates has a consistency so as to avoid stress on the electro-optic ceramic substrate. A voltage imposed on the electro-optic ceramic substrate by the electrode layers on the inner parallel surfaces of the first and second end substrates effectively controls an optical distance between the reflective coating layers on the inner parallel surfaces of the first and second end substrates of the etalon structure. The electro-optic ceramic substrate is preferably PMN-PT ((1-x)Pb(Mg?Nb?)O3-x—PbTiO3) and no more than 160 ?m thick.Type: ApplicationFiled: August 14, 2013Publication date: July 24, 2014Applicant: Lightwaves 2020, Inc.Inventor: Jing-Jong Pan
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Patent number: 8559090Abstract: A tunable optical filter is formed in the structure of an etalon. A thin electro-optic ceramic substrate is fixed between two end substrates. Each end substrate has an inner parallel surface toward said electro-optic ceramic substrate covered by an electrode layer and a reflecting layer. An adhesive which attaches the electro-optic ceramic substrate to each first and second end substrates has a consistency so as to avoid stress on the electro-optic ceramic substrate. A voltage imposed on the electro-optic ceramic substrate by the electrode layers on the inner parallel surfaces of the first and second end substrates effectively controls an optical distance between the reflective coating layers on the inner parallel surfaces of the first and second end substrates of the etalon structure. The electro-optic ceramic substrate is preferably PMN-PT ((1-x)Pb(Mg?Nb?)O3-x—PbTiO3) and no more than 160 ?m thick.Type: GrantFiled: July 31, 2008Date of Patent: October 15, 2013Assignee: Lightwaves 2020, Inc.Inventor: Jing Jong Pan
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Patent number: 8049894Abstract: A device and method of operation for analyzing signal features over multiple optical wavelengths is presented. A plurality of rotating thin film filters is arranged with respect to a collimated beam of light so that each thin film filter transmits light of a particular wavelength to a detector unit responsive to an angle of incidence of light upon the thin film filter when the thin film filter optically interposes the collimated light beam. Each of the plurality of thin film filters is optically interposed periodically and rotated so that the angle of incidence of light from the first input unit upon the thin film filter varies when the thin film filter is optically interposed to scan the light by wavelength within a selected wavelength band into a detector unit for measurement.Type: GrantFiled: October 5, 2007Date of Patent: November 1, 2011Assignee: Lightwaves 2020, Inc.Inventors: Jing Jong Pan, Zhengda Pang, Yonghong Guo
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Patent number: 8036506Abstract: A tunable optical filter is formed by the longitudinal alignment of two opposing end sections of single-mode optical fibers. On at least one of the end sections is a collimator fiber section which is formed from a section of a graded-index, multimode optical fiber which is an odd number of quarter pitches long. The collimator fiber section has an angled end surface which joined to the reciprocally angled end surface of the at least one single-mode optical fiber end section. Piezoelectric material controls the separation between the first and second single-mode optical fiber end sections and sets the wavelengths of optical signals carried through the first and second single-mode optical fiber end sections.Type: GrantFiled: March 27, 2009Date of Patent: October 11, 2011Assignee: Lightwaves 2020, Inc.Inventor: Jing Jong Pan
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Publication number: 20100245974Abstract: A tunable optical filter is formed by the longitudinal alignment of two opposing end sections of single-mode optical fibers. On at least one of the end sections is a collimator fiber section which is formed from a section of a graded-index, multimode optical fiber which is an odd number of quarter pitches long. The collimator fiber section has an angled end surface which joined to the reciprocally angled end surface of the at least one single-mode optical fiber end section. Piezoelectric material controls the separation between the first and second single-mode optical fiber end sections and sets the wavelengths of optical signals carried through the first and second single-mode optical fiber end sections.Type: ApplicationFiled: March 27, 2009Publication date: September 30, 2010Applicant: LIGHTWAVES 2020, INC.Inventor: Jing Jong Pan
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Publication number: 20090091759Abstract: A device and method of operation for analyzing signal features over multiple optical wavelengths is presented. A plurality of rotating thin film filters is arranged with respect to a collimated beam of light so that each thin film filter transmits light of a particular wavelength to a detector unit responsive to an angle of incidence of light upon the thin film filter when the thin film filter optically interposes the collimated light beam. Each of the plurality of thin film filters is optically interposed periodically and rotated so that the angle of incidence of light from the first input unit upon the thin film filter varies when the thin film filter is optically interposed to scan the light by wavelength within a selected wavelength band into a detector unit for measurement.Type: ApplicationFiled: October 5, 2007Publication date: April 9, 2009Applicant: LIGHTWAVES 2020, INC.Inventors: Jing Jong Pan, Zhengda Pang, Yonghong Guo
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Patent number: 7362504Abstract: Miniature optical devices, including circulator array devices, are fabricated using thin film coating technology. A typical optical device includes two refraction elements arranged opposite each other along a propagation axis and coupled on opposite ends to first and second polarization orientation elements with first and second PBS elements are coupled to the first and second polarization orientation elements, respectively. The refraction elements include complementary Wollaston Prism elements or Rochon Prism elements. Each polarization orientation element includes a Faraday rotator element, and in some embodiments, a half-wave plate formed using thin film coating techniques. The Faraday rotator elements are periodically poled in some embodiments using selective poling techniques to create oppositely oriented magnetic domains so that polarization rotations of 45 degrees in both clockwise and counter-clockwise directions can be simultaneously achieved on the same magnetic garnet.Type: GrantFiled: December 13, 2005Date of Patent: April 22, 2008Assignee: Lightwave 2020, Inc.Inventors: Jing-Jong Pan, Ming Zhou, Hong-Xi Zhang, Feng-Qing Zhou
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Patent number: 7130121Abstract: An EDFA with integrated input and output modules is presented. The integrated input module has a packaged pump laser diode mounted to the metal EDFA package to provide a heat sink for the pump laser diode which sends the pump laser light over a optical fiber section connected to the amplifying erbium-doped optical fiber section. The fiber section is formed from an optical fiber which better matches the transmission modes in the erbium-doped optical fiber section and has an end subsection of the single mode fiber for a larger numerical aperture. Collimating lenses also increase the coupling efficiency of the laser diode to the erbium-doped fiber section. The integrated output module has a photodiode with a tap filter to monitor the output power of the EDFA, an optical isolator to prevent interference in the erbium-doped optical fiber section. With a twin optical isolator, the integrated input and output modules can be arranged in different ways and combinations with the erbium-doped optical fiber section.Type: GrantFiled: March 20, 2006Date of Patent: October 31, 2006Assignee: Lightwaves 2020, Inc.Inventors: Jing-Jong Pan, Xiangdong Qiu, Kejian Guan, Mingjie Zhang
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Publication number: 20060158718Abstract: An EDFA with integrated input and output modules is presented. The integrated input module has a packaged pump laser diode mounted to the metal EDFA package to provide a heat sink for the pump laser diode which sends the pump laser light over a optical fiber section connected to the amplifying erbium-doped optical fiber section. The fiber section is formed from an optical fiber which better matches the transmission modes in the erbium-doped optical fiber section and has an end subsection of the single mode fiber for a larger numerical aperture. Collimating lenses also increase the coupling efficiency of the laser diode to the erbium-doped fiber section. The integrated output module has a photodiode with a tap filter to monitor the output power of the EDFA, an optical isolator to prevent interference in the erbium-doped optical fiber section. With a twin optical isolator, the integrated input and output modules can be arranged in different ways and combinations with the erbium-doped optical fiber section.Type: ApplicationFiled: March 20, 2006Publication date: July 20, 2006Applicant: Lightwaves 2020, Inc.Inventors: Jing-Jong Pan, Xiangdong Qiu, Kejian Guan, Mingjie Zhang
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Patent number: 7058257Abstract: A miniature WDM add/drop multiplexer and its manufacture is described. The device has a plurality of wavelength-dependent filters in the form of thin-film filters mounted to a core frame with the end sections of the input/output optical fiber and other optical fibers associated with each of the filters. The stresses associated with the filters are accounted for. The core frame is sealed, together with the overall package assembly, to provide for long-term reliability of the device. The described device and method of manufacture is also generally applicable to WDM multiplexers and demultiplexers.Type: GrantFiled: March 30, 2004Date of Patent: June 6, 2006Assignee: Lightwaves 2020, Inc.Inventors: Jing-Jong Pan, Yousheng (Eugene) Wu
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Patent number: 7044660Abstract: An EDFA with integrated input and output modules is presented. The integrated input module has a packaged pump laser diode mounted to the metal EDFA package to provide a heat sink for the pump laser diode which sends the pump laser light over a optical fiber section connected to the amplifying erbium-doped optical fiber section. The fiber section is formed from an optical fiber which better matches the transmission modes in the erbium-doped optical fiber section and has an end subsection of the single mode fiber for a larger numerical aperture. Collimating lenses also increase the coupling efficiency of the laser diode to the erbium-doped fiber section. The integrated output module has a photodiode with a tap filter to monitor the output power of the EDFA, an optical isolator to prevent interference in the erbium-doped optical fiber section. With a twin optical isolator, the integrated input and output modules can be arranged in different ways and combinations with the erbium-doped optical fiber section.Type: GrantFiled: July 21, 2005Date of Patent: May 16, 2006Assignee: Lightwaves 2020, Inc.Inventors: Jing-Jong Pan, Xiangdong Qiu, Kejian Guan, Mingjie Zhang
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Patent number: 7035501Abstract: Cholesteric liquid crystal cell units are used for reflecting or transmitting incident light responsive to control signals. A cholesteric liquid crystal cell unit has a first cholesteric liquid crystal cell and a second cholesteric liquid crystal cell. The second cholesteric liquid crystal cell respectively reflects or transmit lights from the first cholesteric liquid crystal cell responsive to a control signal when the first cholesteric liquid crystal cell reflects circularly polarized light of one state or transmits the incident light. In one embodiment of the cell unit, a ?-phase waveplate element is located between the first and second cholesteric liquid crystal cells. With the cholesteric liquid crystal cell units, devices such as optical switches, and WDM add/drop multiplexers, and optical switch systems with arrays of input and output optical fibers between a switching matrix formed by the cholesteric liquid crystal cell units, may be constructed.Type: GrantFiled: March 25, 2004Date of Patent: April 25, 2006Assignee: Lightwaves 2020, Inc.Inventors: Jing-Jong Pan, Hai-Ming Wu
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Patent number: 6987611Abstract: Miniature optical devices, including circulator array devices, are fabricated using thin film coating technology. A typical optical device includes two refraction elements arranged opposite each other along a propagation axis and coupled on opposite ends to first and second polarization orientation elements with first and second PBS elements are coupled to the first and second polarization orientation elements, respectively. The refraction elements include complementary Wollaston Prism elements or Rochon Prism elements. Each polarization orientation element includes a Faraday rotator element, and in some embodiments, a half-wave plate formed using thin film coating techniques. The Faraday rotator elements are periodically poled in some embodiments using selective poling techniques to create oppositely oriented magnetic domains so that polarization rotations of 45° in both clockwise and counter-clockwise directions can be simultaneously achieved on the same magnetic garnet.Type: GrantFiled: May 28, 2004Date of Patent: January 17, 2006Assignee: Lightwaves 2020, Inc.Inventors: Jing-Jong Pan, Ming Zhou, Hong-Xi Zhang, Feng-Qing Zhou
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Patent number: 6922281Abstract: An EDFA with integrated input and output modules is presented. The integrated input module has a packaged pump laser diode mounted to the metal EDFA package to provide a heat sink for the pump laser diode which sends the pump laser light over a optical fiber section connected to the amplifying erbium-doped optical fiber section. The fiber section is formed from an optical fiber which better matches the transmission modes in the erbium-doped optical fiber section and has an end subsection of the single mode fiber for a larger numerical aperture. Collimating lenses also increase the coupling efficiency of the laser diode to the erbium-doped fiber section. The integrated output module has a photodiode with a tap filter to monitor the output power of the EDFA, an optical isolator to prevent interference in the erbium-doped optical fiber section. With a twin optical isolator, the integrated input and output modules can be arranged in different ways and combinations with the erbium-doped optical fiber section.Type: GrantFiled: May 3, 2002Date of Patent: July 26, 2005Assignee: Lightwaves 2020, Inc.Inventors: Jing-Jong Pan, Xiangdong Qiu, Kejian Guan, Mingjie Zhang
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Publication number: 20050141815Abstract: A miniature WDM add/drop multiplexer and its manufacture is described. The device has a plurality of wavelength-dependent filters in the form of thin-film filters mounted to a core frame with the end sections of the input/output optical fiber and other optical fibers associated with each of the filters. The stresses associated with the filters are accounted for. The core frame is sealed, together with the overall package assembly, to provide for long-term reliability of the device. The described device and method of manufacture is also generally applicable to WDM multiplexers and demultiplexers.Type: ApplicationFiled: March 30, 2004Publication date: June 30, 2005Applicant: LIGHTWAVES 2020, INC.Inventors: Jing-Jong Pan, Yousheng Wu
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Publication number: 20050111073Abstract: A polarization element and a polarization-sensitive optical isolator are integrated to form an integrated VOA. A preferred embodiment uses a liquid crystal cell as the polarization element to which is attached an optical isolator core of a first polarizer, Faraday rotator, and second polarizer. Voltage on the liquid crystal cell electrodes controls the amount of polarized light from the liquid crystal cell passing through the first polarizer and light in the opposite direction is blocked. The integrated VOA can be mounted within a laser device package so that the power of the source laser diode on the output fiber can be controlled and yet the laser diode is protected from light undesirably entering laser device package through the output fiber.Type: ApplicationFiled: November 20, 2003Publication date: May 26, 2005Applicant: LIGHTWAVES 2020, INC., Corporation of CaliforniaInventors: Jing-Jong Pan, Xiangong Qiu, Feng Zhou, Henry He, Changhong Jiang, Hai-Ming Wu
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Publication number: 20040263972Abstract: Miniature optical devices, including circulator array devices, are fabricated using thin film coating technology. A typical optical device includes two refraction elements arranged opposite each other along a propagation axis and coupled on opposite ends to first and second polarization orientation elements with first and second PBS elements are coupled to the first and second polarization orientation elements, respectively. The refraction elements include complementary Wollaston Prism elements or Rochon Prism elements. Each polarization orientation element includes a Faraday rotator element, and in some embodiments, a half-wave plate formed using thin film coating techniques. The Faraday rotator elements are periodically poled in some embodiments using selective poling techniques to create oppositely oriented magnetic domains so that polarization rotations of 45° in both clockwise and counter-clockwise directions can be simultaneously achieved on the same magnetic garnet.Type: ApplicationFiled: May 28, 2004Publication date: December 30, 2004Applicant: Lightwaves 2020, Inc.Inventors: Jing-Jong Pan, Ming Zhou, Hong-Xi Zhang, Feng-Qing Zhou
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Patent number: 6834137Abstract: Cholesteric liquid crystal cell units are used for reflecting or transmitting incident light responsive to control signals. A cholesteric liquid crystal cell unit has a first cholesteric liquid crystal cell and a second cholesteric liquid crystal cell. The second cholesteric liquid crystal cell respectively reflects or transmit lights from the first cholesteric liquid crystal cell responsive to a control signal when the first cholesteric liquid crystal cell reflects circularly polarized light of one state or transmits the incident light. In one embodiment of the cell unit, a &pgr;-phase waveplate element is located between the first and second cholesteric liquid crystal cells. With the cholesteric liquid crystal cell units, devices such as optical switches, and WDM add/drop multiplexers, and optical switch systems with arrays of input and output optical fibers between a switching matrix formed by the cholesteric liquid crystal cell units, may be constructed.Type: GrantFiled: December 5, 2001Date of Patent: December 21, 2004Assignee: Lightwaves 2020, Inc.Inventors: Jing-Jong Pan, Hai-Ming Wu