Patents by Inventor Xiaojie Xu
Xiaojie Xu 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: 20180317349Abstract: The present invention provides a heat dissipation system for use with a liquid crystal television and a liquid crystal television. The heat dissipation system for use with a liquid crystal television is structured such that a heat spreader (4) having high thermal conductivity is adhesively mounted to a shaped heat-dissipating member (1) and is operated in combination with heat-dissipating fins (5) and fans (6), wherein the heat spreader (4) functions as a core heat transfer medium in the entire heat dissipation system to help greatly reduce a temperature gradient and to remove heat from an LED light bar (2) in a quick, massive, and efficient manner so as to prevent the LED light bar (2) from burning down or shortening of service life due to excessive high temperature. Further, due to the arrangement of the heat spreader (4), the size of the shaped heat-dissipating member (1) can be reduced thereby helping thinning of the liquid crystal television.Type: ApplicationFiled: June 14, 2017Publication date: November 1, 2018Inventor: Xiaojie Xu
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Patent number: 10067303Abstract: A transceiver system may include a laser and a silicon optical grating. The laser may be configured to emit a laser beam at an output of the laser. The laser beam may have a non-circular elliptical mode profile. The silicon grating may be configured to exhibit a mode profile having a shape corresponding to the non-circular elliptical mode profile of the laser beam.Type: GrantFiled: January 17, 2017Date of Patent: September 4, 2018Assignee: FINISAR CORPORATIONInventors: Jianxiao Chen, Xiaojie Xu, Bernd Huebner
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Patent number: 9995892Abstract: An optical assembly may include a platform disposed within a housing that has a limited space. The platform may be tilted by a first angle to fit a fiber array into the limited space of the housing. The optical assembly may also include a silicon photonics device mounted on the tilted platform. The silicon photonics device may include a grating coupler. The optical assembly may also include the fiber array directly coupled to the grating coupler on the silicon photonics device at a coupling position that deviates from a vertical coupling position by a second angle.Type: GrantFiled: June 1, 2017Date of Patent: June 12, 2018Assignee: Finisar CorporationInventor: Xiaojie Xu
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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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Publication number: 20180099930Abstract: Disclosed is a new method for preparing an azetidinone compound represented by formula (I). The carboxylic ketoester represented by formula (II) serves as the raw material and is subjected to Grignard addition, stereoselective dehydration, ester group reduction, hydroxyl group protection, addition with imine after condensation with a chiral auxiliary, cyclization and deprotection to obtain the compound represented by formula (I). The present invention has advantages of easily available raw material, a few synthetic steps, simple operation, high yield, good stereoselectivity and low cost, and can be used for industrial production.Type: ApplicationFiled: December 8, 2017Publication date: April 12, 2018Applicant: Zhejiang Hisun Pharmaceutical Co., Ltd.Inventors: Hua Bai, Xuyang Zhao, Yuncai Zhang, Xufei Li, Yong Zhang, Dezhou Xu, Li Zhang, Xiaojie Xu, Qifeng Zhu, Xiaoming Wang, Zhiqing Yang, Zehua Zhong, Jian Zhang
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Patent number: 9926268Abstract: Disclosed is a new method for preparing an azetidinone compound represented by formula (I). The carboxylic ketoester represented by formula (II) serves as the raw material and is subjected to Grignard addition, stereoselective dehydration, ester group reduction, hydroxyl group protection, addition with imine after condensation with a chiral auxiliary, cyclization and deprotection to obtain the compound represented by formula (I). The present invention has advantages of easily available raw material, a few synthetic steps, simple operation, high yield, good stereoselectivity and low cost, and can be used for industrial production.Type: GrantFiled: June 5, 2015Date of Patent: March 27, 2018Assignee: Zhejiang Hisun Pharmaceutical Co., Ltd.Inventors: Hua Bai, Xuyang Zhao, Yuncai Zhang, Xufei Li, Yong Zhang, Dezhou Xu, Li Zhang, Xiaojie Xu, Qifeng Zhu, Xiaoming Wang, Zhiqing Yang, Zehua Zhong, Jian Zhang
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Patent number: 9874691Abstract: In an example, a coupled system includes a first waveguide, at least one second waveguide, and an interposer. The first waveguide has a silicon (Si) core having first refractive index n1 and a tapered end. The at least one second waveguide each has a silicon nitride (SiN) core having a second refractive index n2. The interposer includes a third waveguide having a third refractive index n3 and a coupler portion, where n1>n2>n3. The tapered end of the first waveguide is adiabatically coupled to a coupler portion of one of the at least one second waveguide. A tapered end of one of the at least one second waveguide is adiabatically coupled to the coupler portion of the third waveguide of the interposer. The third waveguide of the interposer has an optical mode size that is similar to the mode size of a standard single mode optical fiber.Type: GrantFiled: July 12, 2016Date of Patent: January 23, 2018Assignee: Finisar CorporationInventors: Daniel Mahgerefteh, Bryan Park, Jianxiao Chen, Xiaojie Xu, Gilles P. Denoyer, Bernd Huebner
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Publication number: 20170363808Abstract: In an example, a photonic system includes a Si PIC with a Si substrate, a SiO2 box formed on the Si substrate, a first layer, and a second layer. The first layer is formed above the SiO2 box and includes a SiN waveguide with a coupler portion at a first end and a tapered end opposite the first end. The second layer is formed above the SiO2 box and vertically displaced above or below the first layer. The second layer includes a Si waveguide with a tapered end aligned in two orthogonal directions with the coupler portion of the SiN waveguide such that the tapered end of the Si waveguide overlaps in the two orthogonal directions and is parallel to the coupler portion of the SiN waveguide. The tapered end of the SiN waveguide is configured to be adiabatically coupled to a coupler portion of an interposer waveguide.Type: ApplicationFiled: August 31, 2017Publication date: December 21, 2017Inventors: Daniel Mahgerefteh, Bryan Park, Jianxiao Chen, Xiaojie Xu, Gilles P. Denoyer, Bernd Huebner
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Patent number: 9847840Abstract: A laser module can include: a laser chip having a plurality of laser diodes; a focusing lens optically coupled to each of the plurality of distinct laser diodes; and a photonic integrated circuit (PIC) having a plurality of optical inlet ports optically coupled to the plurality of laser diodes through the focusing lens. The laser module can include an optical isolator optically coupled to the focusing lens and PIC and positioned between the focusing lens and PIC. The laser chip can include a fine pitch laser array. The laser module can include a plurality of optical fibers optically coupled to an optical outlet port of the PIC. The laser module can include a hermetic package containing the laser chip and having a single focusing lens positioned for the plurality of laser diodes to emit laser beams there through.Type: GrantFiled: March 17, 2014Date of Patent: December 19, 2017Assignee: FINISAR CORPORATIONInventors: Xiaojie Xu, Mark Donovan
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Publication number: 20170351044Abstract: An optical assembly may include a platform disposed within a housing that has a limited space. The platform may be tilted by a first angle to fit a fiber array into the limited space of the housing. The optical assembly may also include a silicon photonics device mounted on the tilted platform. The silicon photonics device may include a grating coupler. The optical assembly may also include the fiber array directly coupled to the grating coupler on the silicon photonics device at a coupling position that deviates from a vertical coupling position by a second angle.Type: ApplicationFiled: June 1, 2017Publication date: December 7, 2017Inventor: Xiaojie Xu
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Patent number: 9802891Abstract: The present invention provides crystal forms of the compound of (3R,4S)-4-(4-hydroxyphenyl)-3-[3-(4-fluorophenyl)-4-hydroxybut-2(Z)-enyl]-1-(4-fluorophenyl)-2-azetidinone (formula A). The crystal forms can be characterized by X-ray powder diffraction (XRPD) spectra, differential scanning calorimetry (DSC) spectra, infrared absorption spectra and so on. Meanwhile, the present invention also provides methods for preparing the crystal forms of the compound of formula A, pharmaceutical compositions and uses thereof.Type: GrantFiled: December 21, 2016Date of Patent: October 31, 2017Assignee: Zhejiang Hisun Pharmaceutical Co., Ltd.Inventors: Hongyuan Wei, Chongjun Liu, Xuyang Zhao, Xiaojie Xu, Hua Bai, Yuncai Zhang
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Patent number: 9776959Abstract: The present invention provides crystal forms of the compound of (3R,4S)-4-(4-hydroxyphenyl)-3-[3-(4-fluorophenyl)-4-hydroxybut-2(Z)-enyl]-1-(4-fluorophenyl)-2-azetidinone (formula A). The crystal forms can be characterized by X-ray powder diffraction (XRPD) spectra, differential scanning calorimetry (DSC) spectra, infrared absorption spectra and so on. Meanwhile, the present invention also provides methods for preparing the crystal forms of the compound of formula A, pharmaceutical compositions and uses thereof.Type: GrantFiled: December 21, 2016Date of Patent: October 3, 2017Assignee: Zhejiang Hisun Pharmaceutical Co., Ltd.Inventors: Hongyuan Wei, Chongjun Liu, Xuyang Zhao, Xiaojie Xu, Hua Bai, Yuncai Zhang
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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: 20170179680Abstract: A system includes a surface coupled edge emitting laser that includes a core waveguide, a fan out region optically coupled to the core waveguide in a same layer of the surface coupled edge emitting laser as the core waveguide; and a first surface grating formed in the fan out region; and a photonic integrated circuit (PIC) that includes an optical waveguide and a second surface grating formed in an upper layer of the PIC, wherein the second surface grating is in optical alignment with the first surface grating.Type: ApplicationFiled: December 19, 2016Publication date: June 22, 2017Inventors: Daniel Mahgerefteh, Jianxiao Chen, Bernd Huebner, Xiaojie Xu, Yasuhiro Matsui, David Adams, The' Linh Nguyen
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Publication number: 20170121281Abstract: Disclosed is a new method for preparing an azetidinone compound represented by formula (I). The carboxylic ketoester represented by formula (II) serves as the raw material and is subjected to Grignard addition, stereoselective dehydration, ester group reduction, hydroxyl group protection, addition with imine after condensation with a chiral auxiliary, cyclization and deprotection to obtain the compound represented by formula (I). The present invention has advantages of easily available raw material, a few synthetic steps, simple operation, high yield, good stereoselectivity and low cost, and can be used for industrial production.Type: ApplicationFiled: June 5, 2015Publication date: May 4, 2017Applicant: Zhejiang Hisun Pharmaceutical Co., Ltd.Inventors: Hua BAI, Xuyang ZHAO, Yuncai ZHANG, Xufei LI, Yong ZHANG, Dezhou XU, Li ZHANG, Xiaojie XU, Qifeng ZHU, Xiaoming WANG, Zhiqing YANG, Zehua ZHONG, Jian ZHANG
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Publication number: 20170114015Abstract: The present invention provides crystal forms of the compound of (3R,4S)-4-(4-hydroxyphenyl)-3-[3-(4-fluorophenyl)-4-hydroxybut-2(Z)-enyl]-1-(4-fluorophenyl)-2-azetidinone (formula A). The crystal forms can be characterized by X-ray powder diffraction (XRPD) spectra, differential scanning calorimetry (DSC) spectra, infrared absorption spectra and so on. Meanwhile, the present invention also provides methods for preparing the crystal forms of the compound of formula A, pharmaceutical compositions and uses thereof.Type: ApplicationFiled: December 21, 2016Publication date: April 27, 2017Applicant: Zhejiang Hisun Pharmaceutical Co., Ltd.Inventors: Hongyuan Wei, Chongjun Liu, Xuyang Zhao, Xiaojie Xu, Hua Bai, Yuncai Zhang
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Publication number: 20170114016Abstract: The present invention provides crystal forms of the compound of (3R,4S)-4-(4-hydroxyphenyl)-3-[3-(4-fluorophenyl)-4-hydroxybut-2(Z)-enyl]-1-(4-fluorophenyl)-2-azetidinone (formula A). The crystal forms can be characterized by X-ray powder diffraction (XRPD) spectra, differential scanning calorimetry (DSC) spectra, infrared absorption spectra and so on. Meanwhile, the present invention also provides methods for preparing the crystal forms of the compound of formula A, pharmaceutical compositions and uses thereof.Type: ApplicationFiled: December 21, 2016Publication date: April 27, 2017Applicant: Zhejiang Hisun Pharmaceutical Co., Ltd.Inventors: Hongyuan Wei, Chongjun Liu, Xuyang Zhao, Xiaojie Xu, Hua Bai, Yuncai Zhang
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Publication number: 20170052317Abstract: In an example, a coupled system includes a first waveguide, at least one second waveguide, and an interposer. The first waveguide has a silicon (Si) core having first refractive index n1 and a tapered end. The at least one second waveguide each has a silicon nitride (SiN) core having a second refractive index n2. The interposer includes a third waveguide having a third refractive index n3 and a coupler portion, where n1>n2>n3. The tapered end of the first waveguide is adiabatically coupled to a coupler portion of one of the at least one second waveguide. A tapered end of one of the at least one second waveguide is adiabatically coupled to the coupler portion of the third waveguide of the interposer. The third waveguide of the interposer has an optical mode size that is similar to the mode size of a standard single mode optical fiber.Type: ApplicationFiled: July 12, 2016Publication date: February 23, 2017Inventors: Daniel Mahgerefteh, Bryan Park, Jianxiao Chen, Xiaojie Xu, Gilles P. Denoyer, Bernd Huebner
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Patent number: 9567298Abstract: The present invention provides crystal forms of the compound of (3R,4S)-4-(4-hydroxyphenyl)-3-[3-(4-fluorophenyl)-4-hydroxybut-2(Z)-enyl]-1-(4-fluorophenyl)-2-azetidinone (formula A). The crystal forms can be characterized by X-ray powder diffraction (XRPD) spectra, differential scanning calorimetry (DSC) spectra, infrared absorption spectra and so on. Meanwhile, the present invention also provides methods for preparing the crystal forms of the compound of formula A, pharmaceutical compositions and uses thereof.Type: GrantFiled: September 5, 2013Date of Patent: February 14, 2017Assignee: Zhejiang Hisun Pharmaceutical Co., Ltd.Inventors: Hongyuan Wei, Chongjun Liu, Xuyang Zhao, Xiaojie Xu, Hua Bai, Yuncai Zhang
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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