Patents by Inventor Shyh-Chung Lin
Shyh-Chung Lin 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: 11719965Abstract: An optical isolator device with minimized polarization mode dispersion includes a first polarization splitter/combiner, a non-reciprocal polarization rotator and a second polarization splitter/combiner. Only forward propagation of light is allowed to propagate in the device, with backward optical signal blocked due to non-reciprocal polarization rotation. The optical paths of o-ray and e-ray are arranged to achieve equal optical path lengths, which makes polarization mode dispersion minimal to nonexistent. When symmetrically configured, both polarization mode dispersion (PMD) and polarization dependent loss (PDL) become zero in principle.Type: GrantFiled: December 16, 2020Date of Patent: August 8, 2023Assignee: Lightel Technologies, Inc.Inventors: Shyh-Chung Lin, Hongyu Hu
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Patent number: 11700062Abstract: A simple, compact and low-cost passive optical transceiver device with four terminals may be used in an optical transmission system with polarization-diversity coherent detection scheme. The transceiver is composed of a first polarization splitter/combiner, a non-reciprocal polarization rotator and a second polarization splitter/combiner. The device simultaneously operates as a transmitter and a receiver with optical signals propagating along opposite directions wherein non-reciprocal polarization rotation leads to distinct effects. The received optical signal is thus split into two orthogonal polarization components directed towards two separate ports.Type: GrantFiled: December 12, 2021Date of Patent: July 11, 2023Assignee: Lightel Technologies, Inc.Inventors: Shyh-Chung Lin, Hongyu Hu
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Publication number: 20230188215Abstract: A simple, compact and low-cost passive optical transceiver device with four terminals may be used in an optical transmission system with polarization-diversity coherent detection scheme. The transceiver is composed of a first polarization splitter/combiner, a non-reciprocal polarization rotator and a second polarization splitter/combiner. The device simultaneously operates as a transmitter and a receiver with optical signals propagating along opposite directions wherein non-reciprocal polarization rotation leads to distinct effects. The received optical signal is thus split into two orthogonal polarization components directed towards two separate ports.Type: ApplicationFiled: December 12, 2021Publication date: June 15, 2023Inventors: Shyh-Chung Lin, Hongyu Hu
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Publication number: 20220187639Abstract: An optical isolator device with minimized polarization mode dispersion includes a first polarization splitter/combiner, a non-reciprocal polarization rotator and a second polarization splitter/combiner. Only forward propagation of light is allowed to propagate in the device, with backward optical signal blocked due to non-reciprocal polarization rotation. The optical paths of o-ray and e-ray are arranged to achieve equal optical path lengths, which makes polarization mode dispersion minimal to nonexistent. When symmetrically configured, both polarization mode dispersion (PMD) and polarization dependent loss (PDL) become zero in principle.Type: ApplicationFiled: December 16, 2020Publication date: June 16, 2022Inventors: Shyh-Chung Lin, Hongyu Hu
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Patent number: 9910222Abstract: A compact configuration of a multiport fiber array and a multi-surface optical lens constitutes a low modal noise multimode fiber optical power splitter. In a digital optical system, modal noise manifests itself in modal dependent intensity noise and modal dependent timing jitter. A compact two-part end coupling design improves both properties and is more cost effective, making it a suitable solution for future high bit rate optical system applications.Type: GrantFiled: May 16, 2017Date of Patent: March 6, 2018Assignee: LIGHTEL TECHNOLOGIES, INC.Inventors: Shyh-Chung Lin, Kelvin Deray Lin
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Patent number: 9823500Abstract: An optical assembly maintains 90° polarization rotation. In one aspect, an optical assembly includes a polarization beam splitter a rotational element and a path exchange mirror. The temperature, wavelength and manufacturing dependencies of polarization rotation of this optical assembly are minimal to nonexistent compared to conventional Faraday rotation assemblies as the optical fiber accepts only the desired rotation. As such these optical assemblies have no temperature and wavelength dependencies of the polarization rotation angle over broad temperature and wavelength ranges with minimal additional losses. In another aspect, the polarization dependence of reflection from the path exchange mirror is managed so as to minimize the polarization effect associated with oblique incidence.Type: GrantFiled: September 26, 2014Date of Patent: November 21, 2017Assignee: LIGHTEL TECHNOLOGIES, INC.Inventors: Shyh-Chung Lin, Hsin-Jung Lee
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Patent number: 9551888Abstract: Embodiments of a magneto-optic crystal assembly for use in polarization rotation applications are disclosed. In one aspect, a magneto-optic crystal assembly includes two or more magneto-optic crystals. The temperature and wavelength dependencies of Faraday rotation of these crystals are compensated so that the crystal assembly has both reduced temperature and wavelength dependencies of the polarization rotation angle over broad temperature and wavelength ranges.Type: GrantFiled: January 3, 2014Date of Patent: January 24, 2017Assignee: LIGHTEL TECHNOLOGIES, INC.Inventors: Shyh-Chung Lin, Erin M. Casey
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Patent number: 9541776Abstract: An optical assembly maintains 90° polarization rotation. In one aspect, an optical assembly includes a polarization beam splitter a rotational element and a path exchange mirror. The temperature, wavelength and manufacturing dependencies of polarization rotation of this optical assembly are minimal to nonexistent compared to conventional Faraday rotation assemblies as the optical fiber accepts only the desired rotation. As such these optical assemblies have no temperature and wavelength dependencies of the polarization rotation angle over broad temperature and wavelength ranges with minimal additional losses.Type: GrantFiled: June 23, 2014Date of Patent: January 10, 2017Assignee: LIGHTEL TECHNOLOGIES, INC.Inventors: Shyh-Chung Lin, Hsin-Jung Lee
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Publication number: 20150370096Abstract: Embodiments of an optical assembly for use in polarization rotation applications are disclosed. In one aspect, an optical assembly includes a polarization beam splitter a rotational element and a path exchange mirror. The temperature, wavelength and manufacturing dependencies of polarization rotation of this optical assembly are minimal to nonexistent compared to conventional Faraday rotation assemblies as the optical fiber accepts only the desired rotation. As such these optical assemblies have no temperature and wavelength dependencies of the polarization rotation angle over broad temperature and wavelength ranges with minimal additional losses.Type: ApplicationFiled: June 23, 2014Publication date: December 24, 2015Inventors: Shyh-Chung Lin, Erin M. Casey, Hsin-Jung Lee
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Publication number: 20150370097Abstract: Embodiments of an optical assembly for use in polarization rotation applications are disclosed. In one aspect, an optical assembly includes a polarization beam splitter a rotational element and a path exchange mirror. The temperature, wavelength and manufacturing dependencies of polarization rotation of this optical assembly are minimal to nonexistent compared to conventional Faraday rotation assemblies as the optical fiber accepts only the desired rotation. As such these optical assemblies have no temperature and wavelength dependencies of the polarization rotation angle over broad temperature and wavelength ranges with minimal additional losses. In another aspect, the polarization dependence of reflection from the path exchange mirror is managed so as to minimize the polarization effect associated with oblique incidence.Type: ApplicationFiled: September 26, 2014Publication date: December 24, 2015Applicant: Lightel Technologies, Inc.Inventors: Shyh-Chung Lin, Erin M. Casey, Hsin-Jung Lee
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Publication number: 20150192804Abstract: Embodiments of a magneto-optic crystal assembly for use in polarization rotation applications are disclosed. In one aspect, a magneto-optic crystal assembly includes two or more magneto-optic crystals. The temperature and wavelength dependencies of Faraday rotation of these crystals are compensated so that the crystal assembly has both reduced temperature and wavelength dependencies of the polarization rotation angle over broad temperature and wavelength ranges.Type: ApplicationFiled: January 3, 2014Publication date: July 9, 2015Applicant: Lightel Technologies, Inc.Inventors: Shyh-Chung Lin, Erin M. Casey