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: 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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Patent number: 9405066Abstract: In an example, a coupled system includes a first waveguide, at least one second waveguide, and an interposer. The first waveguide has a first refractive index n1 and a tapered end. The at least one second waveguide each has 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 coupled system is configured to adiabatically couple light between the first waveguide and the at least one second waveguide and between the at least one second waveguide and the third waveguide.Type: GrantFiled: November 11, 2015Date of Patent: August 2, 2016Assignee: FINISAR CORPORATIONInventors: Daniel Mahgerefteh, Bryan Park, Jianxiao Chen, Xiaojie Xu, Gilles P. Denoyer, Bernd Huebner
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Patent number: 9350454Abstract: Multi-laser transmitter optical subassembly (TOSA). In one example embodiment, a method of fabricating a multi-laser TOSA includes various acts. First, first and second optical signals are transmitted from first and second lasers, respectively. Next, the angle of a first collimating lens is actively adjusted to cause the second optical signal to be aligned with the first optical signal as the first optical signal passes through a first filter and as the second optical signal is reflected by the first filter such that the first and second optical signals are aligned and combined.Type: GrantFiled: January 21, 2011Date of Patent: May 24, 2016Assignee: FINISAR CORPORATIONInventors: Xiaojie Xu, Bernd Huebner
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Publication number: 20160131837Abstract: In an example, a coupled system includes a first waveguide, at least one second waveguide, and an interposer. The first waveguide has a first refractive index n1 and a tapered end. The at least one second waveguide each has 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 coupled system is configured to adiabatically couple light between the first waveguide and the at least one second waveguide and between the at least one second waveguide and the third waveguide.Type: ApplicationFiled: November 11, 2015Publication date: May 12, 2016Inventors: Daniel Mahgerefteh, Bryan Park, Jianxiao Chen, Xiaojie Xu, Gilles P. Denoyer, Bernd Huebner
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Publication number: 20160131842Abstract: 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: November 11, 2015Publication date: May 12, 2016Inventors: Daniel Mahgerefteh, Bryan Park, Jianxiao Chen, Xiaojie Xu, Gilles P. Denoyer, Bernd Huebner
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Publication number: 20150256256Abstract: 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: ApplicationFiled: March 10, 2015Publication date: September 10, 2015Inventors: Samir Sheth, Jonathan P. King, T.H. Ola Sjolund, Xiaojie Xu, Tengda Du, Steffen Koehler
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Publication number: 20150218091Abstract: 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: September 5, 2013Publication date: August 6, 2015Applicant: Zhejiang Hisun Pharmaceutical Co., Ltd.Inventors: Hongyuan Wei, Chongjun Liu, Xuyang Zhao, Xiaojie Xu, Hua Bai, Yuncai Zhang
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Patent number: 8623855Abstract: Preparation of azetidinone compounds and medical use thereof are provided by the present invention. More particularly, azetidionne compounds, shown as formula (I), wherein R1, R2, R3, R4, R5 and R6 are defined in description, and preparation methods thereof are provided by the present invention. The compounds of the present invention can reduce the levels of total cholesterol (TC) and low density lipoprotein cholesterol (LDL-C) in plasma, and can be used as medicaments for reducing cholesterol in blood. Therefore the compounds of the present invention can be used to treat or prevent diseases of atherosclerosis, cacergasia of blood vessel, cardiac failure, coronary artery disease, angiocardiopathy, myocardial, angina, hyperlipoidemia and hypercholesteremia and the like. Preparation method of compounds of formula (I) and intermediate compounds are also provided by the present invention.Type: GrantFiled: August 9, 2010Date of Patent: January 7, 2014Assignee: Zhejiang Hisun Pharmaceutical Co., Ltd.Inventors: Hua Bai, Xuyang Zhao, Xiaojie Xu, Xiaoyu Liu, Yuncai Zhang, Ying Chen, Xiaohe Zheng, Maojian Gu, Qifeng Zhu, Yong Zhang, Hairong Luo
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Publication number: 20120208994Abstract: Preparation of azetidinone compounds and medical use thereof are provided by the present invention. More particularly, azetidionne compounds, shown as formula (I), wherein R1, R2, R3, R4, R5 and R6 are defined in description, and preparation methods thereof are provided by the present invention. The compounds of the present invention can reduce the levels of total cholesterol (TC) and low density lipoprotein cholesterol (LDL-C) in plasma, and can be used as medicaments for reducing cholesterol in blood. Therefore the compounds of the present invention can be used to treat or prevent diseases of atherosclerosis, cacergasia of blood vessel, cardiac failure, coronary artery disease, angiocardiopathy, myocardial, angina, hyperlipoidemia and hypercholesteremia and the like. Preparation method of compounds of formula (I) and intermediate compounds are also provided by the present invention.Type: ApplicationFiled: August 9, 2010Publication date: August 16, 2012Applicant: ZHEJIANG HISUN PHARMACEUTICAL CO., LTD.Inventors: Hua Bai, Xuyang Zhao, Xiaojie Xu, Xiaoyu Liu, Yuncai Zhang, Ying Chen, Xiaohe Zheng, Maojian Gu, Qifeng Zhu, Yong Zhang, Hairong Luo
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Publication number: 20120189314Abstract: Multi-laser transmitter optical subassembly (TOSA). In one example embodiment, a method of fabricating a multi-laser TOSA includes various acts. First, first and second optical signals are transmitted from first and second lasers, respectively. Next, the angle of a first collimating lens is actively adjusted to cause the second optical signal to be aligned with the first optical signal as the first optical signal passes through a first filter and as the second optical signal is reflected by the first filter such that the first and second optical signals are aligned and combined.Type: ApplicationFiled: January 21, 2011Publication date: July 26, 2012Applicant: FINISAR CORPORATIONInventors: Xiaojie Xu, Bernd Huebner
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Publication number: 20120189323Abstract: Multi-laser transmitter optical subassembly (TOSAs) for an optoelectronic module. In one example embodiment, a method of fabricating a multi-laser TOSA includes various acts. First, first and second optical signals are transmitted from first and second lasers, respectively. Next, the angle of a first minor actively adjusted to reflect the first optical signal toward a first filter that reflects the first optical signal and transmits the second optical signal such that the first and second optical signals are aligned and combined.Type: ApplicationFiled: January 21, 2011Publication date: July 26, 2012Applicant: FINISAR CORPORATIONInventors: Xiaojie Xu, Bernd Huebner
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Patent number: 7801442Abstract: Embodiments introduce redundant optical channels to significantly extend the lifetime of parallel optical transceivers. A plurality of transmitters, N, transmit on a plurality of optical channels, where N is an integer number of optical channels greater than 1. One or more redundant channels, M, are also provided. N+M multiple input shift registers provide multiple paths for signals from each of the transmitters to connect to N+M laser diodes. In the event up to M of the N+M laser diodes fail, the multiple input shift registers connect the N transmitters to functioning ones of the N+M laser diodes thus extending the life of the device. A corresponding scheme is also described for the receiver side.Type: GrantFiled: December 28, 2006Date of Patent: September 21, 2010Assignee: Intel CorporationInventors: Frank Wang, Darren Crews, Lee Xu, Graham Flower, Miaobin Gao, Chien-Chang Liu, Jesse Chin, Brian Kim, William Wang, Guobin Liu, Xiaojie Xu, Thiri Lwin, Yousheng Wu, Simon Lee, II
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Publication number: 20080273880Abstract: Embodiments introduce redundant optical channels to significantly extend the lifetime of parallel optical transceivers. A plurality of transmitters, N, transmit on a plurality of optical channels, where N is an integer number of optical channels greater than 1. One or more redundant channels, M, are also provided. N+M multiple input shift registers provide multiple paths for signals from each of the transmitters to connect to N+M laser diodes. In the event up to M of the N+M laser diodes fail, the multiple input shift registers connect the N transmitters to functioning ones of the N+M laser diodes thus extending the life of the device. A corresponding scheme is also described for the receiver side.Type: ApplicationFiled: December 28, 2006Publication date: November 6, 2008Inventors: Frank Wang, Darren Crews, Lee Xu, Graham Flower, Miaobin Gao, Chien-Chang Liu, Jesse Chin, Brian Kim, William Wang, Guobin Liu, Xiaojie Xu, Thiri Lwin, Yousheng Wu, Simon Lee
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Patent number: 6891994Abstract: A device includes a first fiber collimator, a second fiber collimator, a third fiber collimator, a first beam splitting prism, a second beam splitting prism, a spacer, a resonator cube, and a dielectric beam splitting coating. The dielectric beam splitting coating separates the second beam splitting prism from the resonator cube. The spacer and the first fiber collimator straddle the first beam splitting prism. The first beam splitting prism and the second beam splitting prism straddle the spacer. The second fiber collimator and the spacer straddle the second beam splitting prism. The third fiber collimator and the spacer straddle the second beam splitting prism.Type: GrantFiled: October 21, 2002Date of Patent: May 10, 2005Assignee: Stratos International, Inc.Inventors: Xiaojie Xu, Kenneth A. Fesler, Kaine Mildenberger
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Patent number: 6871022Abstract: Methods and apparatus for multiplexing and demultiplexing optical signals. An interleaver having a modified Mach-Zehnder interferometer as a first stage is used as a wavelength division multiplexer. This first stage is combined with one or more cascaded stages, each having a beam splitter and an optical delay element. A light beam including a number of signals at different wavelengths is received. The beam is split such that approximately half of each signal is contained in one of two sub-beams. One of the two sub-beams passes through a delay element, which provides a phase shift. The two sub-beams are recombined and split again. Each wavelength adds constructively or destructively in the new sub-beams such that the signals are separated—some wavelengths are in one of the new sub-beams, some are in the other. One of these sub-beams is delayed, and the two are combined and split again, improving the separation.Type: GrantFiled: September 14, 2001Date of Patent: March 22, 2005Assignee: Stratos International, Inc.Inventor: Xiaojie Xu
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Publication number: 20040076370Abstract: A device includes a first fiber collimator, a second fiber collimator, a third fiber collimator, a first beam splitting prism, a second beam splitting prism, a spacer, a resonator cube, and a dielectric beam splitting coating. The dielectric beam splitting coating separates the second beam splitting prism from the resonator cube. The spacer and the first fiber collimator straddle the first beam splitting prism. The first beam splitting prism and the second beam splitting prism straddle the spacer. The second fiber collimator and the spacer straddle the second beam splitting prism. The third fiber collimator and the spacer straddle the second beam splitting prism.Type: ApplicationFiled: October 21, 2002Publication date: April 22, 2004Inventors: Xiaojie Xu, Kenneth A. Fesler, Kaine Mildenberger
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Publication number: 20030053167Abstract: Methods and apparatus for multiplexing and demultiplexing optical signals. An interleaver having a modified Mach-Zehnder interferometer as a first stage is used as a wavelength division multiplexer. This first stage is combined with one or more cascaded stages, each having a beam splitter and an optical delay element. A light beam including a number of signals at different wavelengths is received. The beam is split such that approximately half of each signal is contained in one of two sub-beams. One of the two sub-beams passes through a delay element, which provides a phase shift. The two sub-beams are recombined and split again. Each wavelength adds constructively or destructively in the new sub-beams such that the signals are separated—some wavelengths are in one of the new sub-beams, some are in the other. One of these sub-beams is delayed, and the two are combined and split again, improving the separation.Type: ApplicationFiled: September 14, 2001Publication date: March 20, 2003Inventor: Xiaojie Xu
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Patent number: 6399525Abstract: Glass fibers prepared by flame attenuation display excellent chemical resistance to both acids and moisture while being highly biosoluble at the same time. The glass compositions are characterized by ratios of components which are reflective of acid resistance, biosolubility, and moisture resistance. Preferred glass fibers exhibit a biodissolution greater than about 350 ng/cm/2hr.Type: GrantFiled: July 12, 2001Date of Patent: June 4, 2002Assignee: Johns Manville International, Inc.Inventors: Foster Laverne Harding, Jon Frederick Bauer, Harry Hand Russell, III, Xiaojie Xu
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Publication number: 20020006856Abstract: Glass fibers prepared by flame attenuation display excellent chemical resistance to both acids and moisture while being highly biosoluble at the same time. The glass compositions are characterized by ratios of components which are reflective of acid resistance, biosolubility, and moisture resistance. Preferred glass fibers exhibit a biodissolution greater than about 350 ng/cm/2hr.Type: ApplicationFiled: July 12, 2001Publication date: January 17, 2002Inventors: Foster Laverne Harding, Jon Frederick Bauer, Harry Hand Russell, Xiaojie Xu
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Patent number: 6294491Abstract: An insulation product especially suited for use as an aircraft insulation includes a blanket of randomly oriented entangled glass fibers bonded together by a thermosetting binder and having a mean diameter of about 1+/−0.25 microns. The blanket has a density between about 0.25 and about 1.5 pounds per cubic foot and a thickness between about 0.35 inches and about 2.0 inches. The blanket, exclusive of anything else, has an average machine direction tensile strength of at least 0.6 pounds/inch of blanket width and an average cross machine direction tensile strength of at least 0.3 pounds/inch of blanket length; a transverse airflow resistance between about 300 Rayls and about 1800 Rayls; and a thermal conductivity equal to or less than about 0.32 BTU-in/hr-ft2-° F. The glass fibers of the blanket have a biodissolution rate in excess of 150 ng/cm2/hr.Type: GrantFiled: May 13, 1999Date of Patent: September 25, 2001Assignee: Johns Manville International, Inc.Inventors: Ralph Michael Fay, Jeffrey Canon Townsend, Foster Laverne Harding, Jon Frederick Bauer, Harry Hand Russell, III, Xiaojie Xu