Patents by Inventor Tengda Du
Tengda Du 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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Publication number: 20230130007Abstract: A system is proposed for continuously monitoring the integrity of a transmission fiber coupled to a laser source and immediately shutting down the laser source upon recognition of any type of cut, break or disconnect along the transmission fiber. A pair of monitoring photodiodes is included with the laser source and used to look at the ratio of reflected light to transmitted light, shutting down the laser if the ratio exceeds a given threshold. If a break is present, the power of the reflected light will be higher than normal, where a defined threshold is used to determine of the calculated intensity is indicative of a break. By using measurements performed in terms of decibels, the monitoring system needs only to take the difference in intensities to generate the reflection/transmission ratio output.Type: ApplicationFiled: October 27, 2021Publication date: April 27, 2023Applicant: II-VI Delaware, Inc.Inventors: Tengda Du, Xiaojie Xu, Tsurugi Sudo, Martin Kwakernaak
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Patent number: 10845553Abstract: Multichannel RF Feedthroughs. In some examples, a multichannel RF feedthrough includes an internal portion and an external portion. The internal portion includes a top surface on which first and second sets of traces are formed. Each set of traces is configured as an electrical communication channel to carry electrical data signals. The external portion includes a bottom surface on which the first set of traces is formed and a top surface on which the second set of traces is formed. A set of vias connects the first set of traces between the top surface of the internal portion and the bottom surface of the external portion.Type: GrantFiled: December 29, 2016Date of Patent: November 24, 2020Assignee: II-VI Delaware Inc.Inventors: Yan yang Zhao, Bernd Huebner, Tengda Du, Yuheng Lee
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Patent number: 10795170Abstract: In an example embodiment, a method includes receiving a first combined optical signal at an edge filter. The method further includes redirecting, at the edge filter, a second combined optical signal toward a first zigzag demultiplexer; and passing a third combined optical signal through the edge filter toward a light redirector based on wavelength. The method further includes redirecting the third combined optical signal toward a second zigzag demultiplexer. The method may further includes separating, at the first zigzag demultiplexer, the second combined optical signal into a first optical signal on a first optical path and a second optical signal on a second optical path based on wavelength. The method further includes separating, at the second zigzag demultiplexer, the third combined optical signal into a third optical signal on a third optical path and a fourth optical signal on a fourth optical path based on wavelengths.Type: GrantFiled: November 16, 2018Date of Patent: October 6, 2020Assignee: II-VI Delaware Inc.Inventors: Tengda Du, Xiaojie Xu
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Publication number: 20200159034Abstract: In an example embodiment, a method includes receiving a first combined optical signal at an edge filter. The method further includes redirecting, at the edge filter, a second combined optical signal toward a first zigzag demultiplexer; and passing a third combined optical signal through the edge filter toward a light redirector based on wavelength. The method further includes redirecting the third combined optical signal toward a second zigzag demultiplexer. The method may further includes separating, at the first zigzag demultiplexer, the second combined optical signal into a first optical signal on a first optical path and a second optical signal on a second optical path based on wavelength. The method further includes separating, at the second zigzag demultiplexer, the third combined optical signal into a third optical signal on a third optical path and a fourth optical signal on a fourth optical path based on wavelengths.Type: ApplicationFiled: November 16, 2018Publication date: May 21, 2020Inventors: Tengda Du, Xiaojie Xu
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Patent number: 10459169Abstract: An optical assembly includes a first grating device configured to: receive a light beam that includes an optical signal with a particular wavelength from a fiber; and change a propagation direction of the optical signal according to the particular wavelength of the optical signal. The optical assembly also includes a second grating device configured to: receive the optical signal outputted from the first grating device; change the propagation direction of the optical signal according to the particular wavelength of the optical signal; and direct the optical signal onto a grating coupler. The first grating device and the second grating device are configured to satisfy a plurality of configuration constraints.Type: GrantFiled: March 26, 2019Date of Patent: October 29, 2019Assignee: Finisar CorporationInventors: Xiaojie Xu, Thomas W. Mossberg, Tengda Du, Christoph M. Greiner, Dmitri Iazikov
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Publication number: 20190219769Abstract: An optical assembly includes a first grating device configured to: receive a light beam that includes an optical signal with a particular wavelength from a fiber; and change a propagation direction of the optical signal according to the particular wavelength of the optical signal. The optical assembly also includes a second grating device configured to: receive the optical signal outputted from the first grating device; change the propagation direction of the optical signal according to the particular wavelength of the optical signal; and direct the optical signal onto a grating coupler. The first grating device and the second grating device are configured to satisfy a plurality of configuration constraints.Type: ApplicationFiled: March 26, 2019Publication date: July 18, 2019Inventors: Xiaojie XU, Thomas W. MOSSBERG, Tengda DU, Christoph M. GREINER, Dmitri IAZIKOV
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Patent number: 10241274Abstract: An optical assembly includes a first grating device configured to: receive a light beam that includes an optical signal with a particular wavelength from a fiber; and change a propagation direction of the optical signal according to the particular wavelength of the optical signal. The optical assembly also includes a second grating device configured to: receive the optical signal outputted from the first grating device; change the propagation direction of the optical signal according to the particular wavelength of the optical signal; and direct the optical signal onto a grating coupler. The first grating device and the second grating device are configured to satisfy a plurality of configuration constraints.Type: GrantFiled: March 9, 2017Date of Patent: March 26, 2019Assignee: FINISAR CORPORATIONInventors: Xiaojie Xu, Thomas W. Mossberg, Tengda Du, Christoph M. Greiner, Dmitri Iazikov
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Patent number: 9991964Abstract: Embodiments described herein include a multichannel transmitter optical subassembly that includes a plurality of lasers and a signal combiner. The plurality of lasers may be configured to emit light each with a different one of a plurality of light signals, each of the plurality of light signals having a wavelength within one of a plurality of wavelength bands. The signal combiner may be disposed relative to the plurality of lasers to receive the plurality of light signals. The signal combiner may include at least one surface having an optical coating that reflects at least one of the light signals of the plurality of light signals and transmits at least one of the light signals of the plurality of light signals.Type: GrantFiled: March 10, 2016Date of Patent: June 5, 2018Assignee: FINISAR CORPORATIONInventors: Tengda Du, Xiaojie Xu
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Patent number: 9912437Abstract: An optical transmitter may include a transmit laser assembly configured to emit multiple light beams. The optical transmitter may additionally include an isolator configured to rotate a corresponding polarization state of each of the multiple light beams. The optical transmitter may additionally include a power multiplexing combiner configured to receive the multiple light beams from the isolator and combine the multiple light beams into a combined light beam. The optical transmitter may additionally include a lens configured to focus the combined light beam onto an optical fiber for transmission.Type: GrantFiled: February 17, 2016Date of Patent: March 6, 2018Assignee: Finisar CorporationInventors: Tao Wu, Hongyu Deng, Maziar Amirkiai, Shanshan Zeng, Tengda Du, Yunpeng Song
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Patent number: 9897758Abstract: An optical circulator integrated into a transceiver for bi-directional communication may include a core configured to pass a transmission signal in a transmit direction and a received signal in a receive direction. The optical circulator may include an input port optically coupled to the core. The input port may be configured to deliver the transmission signal to the core. The optical circulator may include an output port optically coupled to the core. The output port may be configured to receive the received signal from the core. The optical circulator may additionally include a network port optically coupled to the core. The network port may be configured to receive the transmission signal from the core and deliver the transmission signal to a fiber optic cable. The network port may be configured to receive the received signal from the fiber optic cable and deliver the received signal to the core.Type: GrantFiled: April 18, 2017Date of Patent: February 20, 2018Assignee: FINISAR CORPORATIONInventors: Tengda Du, Jack Xu
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Patent number: 9885815Abstract: A wavelength locker for use with tunable optical devices may include an etalon, a polarization beam splitter, and a first and second detector. The etalon may be positioned to receive a first beam and may include a first birefringent crystal having a first optical axis and a second birefringent crystal having a second optical axis. The first birefringent crystal may be coupled to the second birefringent crystal such that the first optical axis and the second optical axis are orthogonal to one another.Type: GrantFiled: October 27, 2014Date of Patent: February 6, 2018Assignee: Finisar CorporationInventor: Tengda Du
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Publication number: 20170276876Abstract: An optical circulator integrated into a transceiver for bi-directional communication may include a core configured to pass a transmission signal in a transmit direction and a received signal in a receive direction. The optical circulator may include an input port optically coupled to the core. The input port may be configured to deliver the transmission signal to the core. The optical circulator may include an output port optically coupled to the core. The output port may be configured to receive the received signal from the core. The optical circulator may additionally include a network port optically coupled to the core. The network port may be configured to receive the transmission signal from the core and deliver the transmission signal to a fiber optic cable. The network port may be configured to receive the received signal from the fiber optic cable and deliver the received signal to the core.Type: ApplicationFiled: April 18, 2017Publication date: September 28, 2017Inventors: Tengda Du, Jack Xu
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Publication number: 20170261694Abstract: An optical assembly includes a first grating device configured to: receive a light beam that includes an optical signal with a particular wavelength from a fiber; and change a propagation direction of the optical signal according to the particular wavelength of the optical signal. The optical assembly also includes a second grating device configured to: receive the optical signal outputted from the first grating device; change the propagation direction of the optical signal according to the particular wavelength of the optical signal; and direct the optical signal onto a grating coupler. The first grating device and the second grating device are configured to satisfy a plurality of configuration constraints.Type: ApplicationFiled: March 9, 2017Publication date: September 14, 2017Inventors: Xiaojie Xu, Thomas W. Mossberg, Tengda Du, Christoph M. Greiner, Dmitri Iazikov
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Publication number: 20170176700Abstract: Multichannel RF Feedthroughs. In some examples, a multichannel RF feedthrough includes an internal portion and an external portion. The internal portion includes a top surface on which first and second sets of traces are formed. Each set of traces is configured as an electrical communication channel to carry electrical data signals. The external portion includes a bottom surface on which the first set of traces is formed and a top surface on which the second set of traces is formed. A set of vias connects the first set of traces between the top surface of the internal portion and the bottom surface of the external portion.Type: ApplicationFiled: December 29, 2016Publication date: June 22, 2017Inventors: Yan yang Zhao, Bernd Huebner, Tengda Du, Yuheng Lee
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Patent number: 9625650Abstract: An optical circulator integrated into a transceiver for bi-directional communication may include a core configured to pass a transmission signal in a transmit direction and a received signal in a receive direction. The optical circulator may include an input port optically coupled to the core. The input port may be configured to deliver the transmission signal to the core. The optical circulator may include an output port optically coupled to the core. The output port may be configured to receive the received signal from the core. The optical circulator may additionally include a network port optically coupled to the core. The network port may be configured to receive the transmission signal from the core and deliver the transmission signal to a fiber optic cable. The network port may be configured to receive the received signal from the fiber optic cable and deliver the received signal to the core.Type: GrantFiled: August 13, 2014Date of Patent: April 18, 2017Assignee: FINISAR CORPORATIONInventors: Tengda Du, Jack Xu
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Patent number: 9538637Abstract: Multichannel RF Feedthroughs. In some examples, a multichannel RF feedthrough includes an internal portion and an external portion. The internal portion includes a top surface on which first and second sets of traces are formed. Each set of traces is configured as an electrical communication channel to carry electrical data signals. The external portion includes a bottom surface on which the first set of traces is formed and a top surface on which the second set of traces is formed. A set of vias connects the first set of traces between the top surface of the internal portion and the bottom surface of the external portion.Type: GrantFiled: June 26, 2012Date of Patent: January 3, 2017Assignee: FINISAR CORPORATIONInventors: Yan yang Zhao, Bernd Huebner, Tengda Du, Yuheng Lee
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Patent number: 9520943Abstract: An example embodiment includes a system for communicating an optical signal. The system includes an optical transmitter and an optical receiver. The optical transmitter includes one or more lasers configured to produce a light signal and a transmitter optical sub assembly (TOSA) receptacle. The TOSA receptacle optically couples the lasers to an optical fiber and launches a quasi-multimode optical signal (quasi-MM signal) that includes at least one lower order mode optical signal and at least one higher order mode optical signal onto the optical fiber. The optical receiver is connected to the optical fiber via a receiver optical sub assembly (ROSA) receptacle. The optical receiver is configured to receive the quasi-MM signal and to substantially block the at least one higher order mode optical signal.Type: GrantFiled: March 10, 2015Date of Patent: December 13, 2016Assignee: FINISAR CORPORATIONInventors: Samir Sheth, Jonathan P. King, T.H. Ola Sjolund, Xiaojie Xu, Tengda Du, Steffen Koehler
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Publication number: 20160277140Abstract: An optical transmitter may include a transmit laser assembly configured to emit multiple light beams. The optical transmitter may additionally include an isolator configured to rotate a corresponding polarization state of each of the multiple light beams. The optical transmitter may additionally include a power multiplexing combiner configured to receive the multiple light beams from the isolator and combine the multiple light beams into a combined light beam. The optical transmitter may additionally include a lens configured to focus the combined light beam onto an optical fiber for transmission.Type: ApplicationFiled: February 17, 2016Publication date: September 22, 2016Inventors: Tao Wu, Hongyu Deng, Maziar Amirkiai, Shanshan Zeng, Tengda Du, Yunpeng Song
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Publication number: 20160269808Abstract: Embodiments described herein include a multichannel transmitter optical subassembly that includes a plurality of lasers and a signal combiner. The plurality of lasers may be configured to emit light each with a different one of a plurality of light signals, each of the plurality of light signals having a wavelength within one of a plurality of wavelength bands. The signal combiner may be disposed relative to the plurality of lasers to receive the plurality of light signals. The signal combiner may include at least one surface having an optical coating that reflects at least one of the light signals of the plurality of light signals and transmits at least one of the light signals of the plurality of light signals.Type: ApplicationFiled: March 10, 2016Publication date: September 15, 2016Inventors: Tengda Du, Xiaojie Xu
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Publication number: 20160116655Abstract: A wavelength locker for use with tunable optical devices may include an etalon, a polarization beam splitter, and a first and second detector. The etalon may be positioned to receive a first beam and may include a first birefringent crystal having a first optical axis and a second birefringent crystal having a second optical axis. The first birefringent crystal may be coupled to the second birefringent crystal such that the first optical axis and the second optical axis are orthogonal to one another.Type: ApplicationFiled: October 27, 2014Publication date: April 28, 2016Inventor: Tengda Du