Patents by Inventor Jinxi Shen
Jinxi Shen 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: 20090009752Abstract: A method and an apparatus for calibrating a MEMS actuator of a hybrid MEMS-PLC optical switch or router is described. Two calibrating waveguides, embedded monolithically adjacent to the waveguides that provide the PLC output functions, are used for referencing a MEMS mirror tilt angle by maximizing optical coupling of light, reflected off the MEMS mirror, into one or each of the two calibrating waveguides. The input light is provided by either a waveguide carrying a live optical signal, or by a special input waveguide, coupled to an LED, for providing a calibrating light. Two emitting waveguides, embedded monolithically adjacent to the waveguides that provide the PLC input functions, can be used.Type: ApplicationFiled: June 30, 2008Publication date: January 8, 2009Applicant: JDS Uniphase CorporationInventors: Philip Duggan, Jinxi Shen, Douglas E. Crafts
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Patent number: 7405829Abstract: The coherent interference effect between two beam is used with one light beam delayed by a controllably variable time delay with respect to another analogous beam to obtain a convolutional profile of the oscillatory component of the interference amplitude as a function of the time delay, having a peak value representing the performance clearance between a zero-bit and a one-bit. The convolutional profile is represented by a diamond diagram (DD) of the interference amplitude, within the coherence length. The peak value and the size of DD openings are used for characterizing pulsed optical signals by determining at least one of a predefined set of signal parameters, including signal degradation, optical chromatic dispersion, signal coherence length, type of signal modulation, and signal-to-noise ratio. The two-beam interference effect is optionally provided by a free-space Mach Zehnder interferometer, an integrated Mach Zehnder interferometer, a Michelson interferometer, or combinations thereof.Type: GrantFiled: November 30, 2005Date of Patent: July 29, 2008Assignee: JDS Uniphase CorporationInventor: Jinxi Shen
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Publication number: 20060285117Abstract: The coherent interference effect between two beam is used with one light beam delayed by a controllably variable time delay with respect to another analogous beam to obtain a convolutional profile of the oscillatory component of the interference amplitude as a function of the time delay, having a peak value representing the performance clearance between a zero-bit and a one-bit. The convolutional profile is represented by a diamond diagram (DD) of the interference amplitude, within the coherence length. The peak value and the size of DD openings are used for characterizing pulsed optical signals by determining at least one of a predefined set of signal parameters, including signal degradation, optical chromatic dispersion, signal coherence length, type of signal modulation, and signal-to-noise ratio. The two-beam interference effect is optionally provided by a free-space Mach Zehnder interferometer, an integrated Mach Zehnder interferometer, a Michelson interferometer, or combinations thereof.Type: ApplicationFiled: November 30, 2005Publication date: December 21, 2006Applicant: JDS Uniphase CorporationInventor: Jinxi Shen
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Patent number: 7130505Abstract: An optical performance monitor for accurate monitoring of the OSNR of a WDM optical signal is provided wherein a demultiplexing arrayed waveguide grating (AWG) having a plurality of Vernier input ports is disposed between an optical switch and a photodiode array coupled to the output ports of the AWG. In operation, the optical switch sequentially provides the input optical signal into each of the Vernier ports, and signals detected by photodiodes are stored in a memory unit. The apparatus is capable of monitoring the OSNR of the WDM signal with a frequency step which is M times smaller than a frequency spacing between the AWG transmission bands, while enabling the OSNR monitoring in an enhanced dynamic range by providing accurate noise sampling.Type: GrantFiled: March 13, 2006Date of Patent: October 31, 2006Assignee: JDS Uniphase CorporationInventor: Jinxi Shen
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Patent number: 7106930Abstract: A demultiplexer/multiplexer is disclosed wherein an arrayed waveguide grating having a reflector at an end includes selectable signal path blockers. The arrayed waveguide device has a common input/output port for launching radiation in the form of an input signal having n wavelengths therein and for receiving back via the reflector at the input/output port a selected channel of the input signal. In operation a multiplexed signal have n channels is launched therein and a selected channel is output for analysis or further processing.Type: GrantFiled: June 28, 2004Date of Patent: September 12, 2006Assignee: JDS Uniphase CorporationInventors: Jinxi Shen, Anca L. Sala, David J. Dougherty, David Funk, Douglas E. Crafts, Barthelemy Fondeur, Pang-Chen Sun
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Publication number: 20060153498Abstract: An optical performance monitor for accurate monitoring of the OSNR of a WDM optical signal is provided wherein a demultiplexing arrayed waveguide grating (AWG) having a plurality of Vernier input ports is disposed between an optical switch and a photodiode array coupled to the output ports of the AWG. In operation, the optical switch sequentially provides the input optical signal into each of the Vernier ports, and signals detected by photodiodes are stored in a memory unit. The apparatus is capable of monitoring the OSNR of the WDM signal with a frequency step which is M times smaller than a frequency spacing between the AWG transmission bands, while enabling the OSNR monitoring in an enhanced dynamic range by providing accurate noise sampling.Type: ApplicationFiled: March 13, 2006Publication date: July 13, 2006Applicant: JDS Uniphase CorporationInventor: Jinxi Shen
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Patent number: 7035505Abstract: An apparatus for monitoring an input optical signal at a plurality of distinct optical frequencies is disclosed wherein a demultiplexing arrayed waveguide grating (AWG) having a plurality of M>1 Vernier input ports is disposed between an optical switch and a photodiode array coupled to the output ports of the AWG. In operation, the optical switch sequentially provides the input optical signal into each of the Vernier ports, and signals detected by photodiodes are stored in a memory unit. The apparatus is capable of monitoring the input optical signal with a frequency step which is M times smaller than a frequency spacing between the AWG transmission bands, and obtain M frequency-resolved readings from each photodiode.Type: GrantFiled: July 22, 2004Date of Patent: April 25, 2006Assignee: JDS Uniphase CorporationInventors: Jinxi Shen, Robert R. McLeod, Douglas E. Crafts, Barthelemy Fondeur, Yong Ding, Pang-Chen Sun
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Patent number: 6898348Abstract: A method and apparatus is described for controlling the attenuation of multiple wavelengths signals propagating in an optical fiber, that may have a time-dependent power in each signal, to provide an output signal having a desired attenuated power in each of the multiple signals. An equalizer may be used that has various optical elements to focus and disperse light, such as a concave diffraction grating and a modulator array having modulators disposed on a concave surface. The equalizer may also be coupled to various components such as a circulator or thermally expanded core fibers.Type: GrantFiled: March 28, 2001Date of Patent: May 24, 2005Assignee: JDS Uniphase CorporationInventors: Valentine N. Morozov, Yevgeniy Churin, Jinxi Shen
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Publication number: 20050031259Abstract: An apparatus for monitoring an input optical signal at a plurality of distinct optical frequencies is disclosed wherein a demultiplexing arrayed waveguide grating (AWG) having a plurality of M>1 Vernier input ports is disposed between an optical switch and a photodiode array coupled to the output ports of the AWG. In operation, the optical switch sequentially provides the input optical signal into each of the Vernier ports, and signals detected by photodiodes are stored in a memory unit. The apparatus is capable of monitoring the input optical signal with a frequency step which is M times smaller than a frequency spacing between the AWG transmission bands, and obtain M frequency-resolved readings from each photodiode.Type: ApplicationFiled: July 22, 2004Publication date: February 10, 2005Applicant: JDS Uniphase CorporationInventors: Jinxi Shen, Robert McLeod, Douglas Crafts, Barthelemy Fondeur, Yong Ding, Pang-Chen Sun
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Publication number: 20050018965Abstract: A demultiplexer/multiplexer is disclosed wherein an arrayed waveguide grating having a reflector at an end includes selectable signal path blockers. The arrayed waveguide device has a common input/output port for launching radiation in the form of an input signal having n wavelengths therein and for receiving back via the reflector at the input/output port a selected channel of the input signal. In operation a multiplexed signal have n channels is launched therein and a selected channel is output for analysis or further processing.Type: ApplicationFiled: June 28, 2004Publication date: January 27, 2005Applicant: JDS Uniphase CorporationInventors: Jinxi Shen, Anca Sala, David Dougherty, David Funk, Douglas Crafts, Barthelemy Fondeur, Pang-Chen Sun
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Patent number: 6678445Abstract: A dynamic gain flattening filter is provided that offers a smooth spectral response. The filter includes an input/output port for launching a beam of light, a dispersive element for dispersing the beam of light into a plurality of monochromatic sub-beams of light, and discrete array of controllable elements for receiving the plurality of sub-beams of light. The filter is designed such that each sub-beam of light is incident on more than one element of the discrete array for selective attenuation before being recombined by the dispersive element and redirected back to the input/output port. In another embodiment, a beam-folding mirror is provided to direct the attenuated beam to a separate output port.Type: GrantFiled: December 4, 2000Date of Patent: January 13, 2004Assignee: JDS Uniphase CorporationInventors: W. John Tomlinson, Valentine N. Morozov, Yevgeniy Churin, Brian Lee Heffner, Long Yang, Jinxi Shen
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Publication number: 20020067888Abstract: A method and apparatus is described for controlling the attenuation of multiple wavelengths signals propagating in an optical fiber, that may have a time-dependent power in each signal, to provide an output signal having a desired attenuated power in each of the multiple signals. An equalizer may be used that has various optical elements to focus and disperse light, such as a concave diffraction grating and a modulator array having modulators disposed on a concave surface. The equalizer may also be coupled to various components such as a circulator or thermally expanded core fibers.Type: ApplicationFiled: March 28, 2001Publication date: June 6, 2002Inventors: Valentine N. Morozov, Yevgeniy Churin, Jinxi Shen
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Publication number: 20020067887Abstract: A dynamic gain flattening filter is provided that offers a smooth spectral response. The filter includes an input/output port for launching a beam of light, a dispersive element for dispersing the beam of light into a plurality of monochromatic sub-beams of light, and discrete array of controllable elements for receiving the plurality of sub-beams of light. The filter is designed such that each sub-beam of light is incident on more than one element of the discrete array for selective attenuation before being recombined by the dispersive element and redirected back to the input/output port. In another embodiment, a beam-folding mirror is provided to direct the attenuated beam to a separate output port.Type: ApplicationFiled: December 4, 2000Publication date: June 6, 2002Inventors: W. John Tomlinson, Valentine N. Morozov, Yevgeniy Churin, Brian Lee Heffner, Long Yang, Jinxi Shen