Patents by Inventor Peiching Ling
Peiching Ling 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: 6973231Abstract: A wavelength selective switch. The switch comprises an input waveguide for carrying an optical signal having a wavelength ?i. Also included is an output waveguide having a Bragg grating adapted for coupling the wavelength ?i into the output waveguide in a coupling zone. Finally, provided is a heater element that can selectively provide thermal energy to the coupling zone such that the Bragg grating does not couple the wavelength ?i.Type: GrantFiled: January 15, 2004Date of Patent: December 6, 2005Assignee: International Optics Communications CorporationInventors: Jianjun Zhang, Peiching Ling, Jinliang Chen, Ming Xu
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Publication number: 20050265720Abstract: An optical add/drop multiplexer (OADM) having reduced crosstalk is disclosed. The OADM uses an optical interleaver to separate channels of a wavelength division multiplexed signal into a plurality of branches. The branches then separately act on the widely spaced channels to add or drop channels. After the add/drop function is completed, the channels on the branches are recombined.Type: ApplicationFiled: May 28, 2004Publication date: December 1, 2005Inventors: Peiching Ling, Jianjun Zhang, Wayne Lui, Jinliang Chen, Ming Xu
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Patent number: 6931169Abstract: The present invention discloses an optical switching element that uses reversible electroplating mirrors includes a trench with transparent sidewalls located at the intersection of two waveguides A and B. The trench has two electrodes; one, which is transparent, is placed on the trench sidewall and the other is placed on the trench floor. The trench is filled with an index-matching electrolytic solution containing ions of a metal that can electro-deposit on these two electrodes. To actuate the switching element, a negative electrical potential is applied to the sidewall electrode. Actuation causes metal deposits to form on the sidewall electrode, creating a mirror that reflects light from waveguide A to waveguide B. To deactivate the switching element, a positive electrical potential is applied to the sidewall electrode. Deactivation causes metal deposits move off the sidewall and form on the trench floor.Type: GrantFiled: February 5, 2002Date of Patent: August 16, 2005Inventors: Jiangjun Zhang, Peiching Ling, Jinliang Chen, Ming Xu
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Patent number: 6891989Abstract: The present invention discloses methods and apparatus for constructing optical switch systems, in which any input optical signals can be routed to any output ports. The methods and apparatus provide advantages of configuration flexibility, modular construction, constant signal loss, and minimal numbers of switch units required. The switch systems comprise M×N switch modules. The switch module in turn comprises a two-dimensional waveguide array and a number of waveguide grating-based wavelength selective switches. With the capability of wavelength-selective routing provided by the switch modules, the optical switch systems requires a relatively small amount of switch units to extend into a very-large-scale switch system.Type: GrantFiled: October 15, 2002Date of Patent: May 10, 2005Assignee: Integrated Optics Communications CorporationInventors: Jianjun Zhang, Peiching Ling, Jinliang Chen, Ming Xu
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Patent number: 6879754Abstract: The present invention discloses a drop-before-add optical routing and switching system. The drop-before-add optical routing and switching system includes an input waveguide for carrying a multiplexed optical signal comprising optical signals transmitted over a plurality of wavelength channels represented by ?1, ?2, ?3, . . . , ?N?1 and ?N, where N is a positive integer wherein the input waveguide extending over a first direction. The drop-before-add optical routing and switching system further includes a plurality of second direction waveguides extending over a second direction and intersecting at N intersections with the input waveguide. The drop-before-add optical routing and switching system further includes a plurality of wavelength selective grating switches each disposed on one of the N intersections for selectively transmitting an optical signal of a selected wavelength into an associated one of the second direction waveguide.Type: GrantFiled: July 3, 2002Date of Patent: April 12, 2005Assignee: Integrated Optics Communications CorporationInventors: Jianjun Zhang, Peiching Ling, Jinliang Chen, Ming Xu
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Patent number: 6876793Abstract: The present invention is a wavelength-selective optical transmission system that includes a first waveguide for transmitting a multiplexed optical signal therethrough. The system further includes a second waveguide coupled to the first waveguide wherein a least one of the first and second waveguides have a set of wavelength-selective Bragg gratings disposed near a coupling section between the first and second waveguides to reflect a reflecting optical signal back to the first waveguide and for transmitting a contra-directional optical signal and a co-directional optical signal having respectively a contra-directional selected wavelength and a co-directional selected wavelength corresponding to the Bragg gratings. One of the contra-directional and co-directional wavelengths is chosen as a designated wavelength, and the reflecting optical signal and one of the contra-directional or co-directional optical signals are outside of a predefined range surrounding the designated wavelength.Type: GrantFiled: December 9, 2003Date of Patent: April 5, 2005Assignee: Integrated Optics Communications Corp.Inventors: Peiching Ling, Wayne Lui, Jinliang Chen, Jianjun Zhang, Ming Xu, Yu Chen
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Patent number: 6842563Abstract: The present invention is a wavelength-selective optical switching system. The switching system includes an input waveguide designated as waveguide WG(0) for receiving a multiplexed optical signal comprising optical signals transmitted over a plurality of wavelength channels represented by ?1, ?2, ?3, , ?N, where N is a positive integer wherein the input waveguide extending over a first direction. The switching system further includes a two dimensional waveguide array comprising a plurality of first direction waveguides WG(i), i=1, 2, 3, , M extending over the first direction substantially parallel to the input waveguide WG(0) where M is a positive integer and a plurality of second direction waveguides WG?(j), j=1, 2, 3, N, extending over a second direction substantially perpendicular to the first direction and intersecting with the input waveguide and each of the first direction waveguide WG(i), i=0, 1, 2, 3, ,M, thus forming (M+1)×N intersections.Type: GrantFiled: June 19, 2002Date of Patent: January 11, 2005Assignee: Oplux, Inc.Inventors: Jiangjun Zhang, Peiching Ling, Jinliang Chen, Ming Xu
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Publication number: 20040228574Abstract: A switchable dispersion compensator comprises an input waveguide for carrying an optical signal having dispersion. Further, a wavelength-selective switch is provided that has a chirped Bragg grating disposed proximate to the input waveguide. The wavelength-selective switch when in an “on” position couples the optical signal into an output waveguide. When the wavelength-selective switch is in an “off” position, the optical signal continues propagating in the input waveguide.Type: ApplicationFiled: May 14, 2003Publication date: November 18, 2004Inventors: Yu Chen, Jianjun Zhang, Peiching Ling, Jinliang Chen, Ming Xu
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Patent number: 6801690Abstract: This invention discloses an optical device that includes a wavelength-selective optical transmission system. The wavelength-selective optical transmission system further includes a first waveguide for transmitting a multiplexed optical signal therethrough. The wavelength-selective optical transmission system further includes a second waveguide coupled to the first waveguide wherein a least one of the first and second waveguides having a set of wavelength-selective Bragg gratings disposed near a coupling section between the first and second waveguides. One of the first and second waveguides has an aspect ratio, i.e., a ratio of a thickness divided by a width, is no greater than 0.75.Type: GrantFiled: February 18, 2004Date of Patent: October 5, 2004Assignee: Integrated Optics Communications Corp.Inventors: Peiching Ling, Wayne Lui, Jinliang Chen, Jianjun Zhang, Ming Xu
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Publication number: 20040146240Abstract: A wavelength selective switch is disclosed. The switch comprises an input waveguide for carrying an optical signal having a wavelength &lgr;1. Also included is an output waveguide having a Bragg grating adapted for coupling the wavelength &lgr;i into the output waveguide in a coupling zone. Finally, provided is a heater element that can selectively provide thermal energy to the coupling zone such that the Bragg grating does not couple the wavelength &lgr;i.Type: ApplicationFiled: January 15, 2004Publication date: July 29, 2004Inventors: Jianjun Zhang, Peiching Ling, Jinliang Chen, Ming Xu
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Publication number: 20040071427Abstract: Electrically activated, wavelength-selective optical switches, a tunable wavelength selector, and a wavelength-tunable light modulator. In one preferred embodiment, an electrically activated, wavelength-selective optical switch comprises on a common substrate a first waveguide, a second waveguide comprising an electro-optic material, a set of Bragg gratings, and a means for generating an electrical field across the second waveguide. When the electrical field is applied, the refractive index of the electro-optic material and the Bragg phase-matching condition of the Bragg gratings are changed, causing one of the multiplexed input optical signals in the first waveguide to be guided by mode coupling into the second waveguide.Type: ApplicationFiled: October 9, 2003Publication date: April 15, 2004Applicant: Integrated Optics Communication Corp.Inventors: Peiching Ling, Jianjun Zhang, Jianliang Chen, Ming Xu
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Patent number: 6710358Abstract: An ion implantation method for reducing energy contamination in low energy beams is disclosed in this invention. The ion implantation method requires the use of a target chamber for containing a target for implantation in vacuum and an ion source chamber with an ion source for generating an ion beam. A means for conducting a mass analysis of the ion beam, such as an analyzer magnet, is also needed. The ion source chamber includes a beam deceleration optics that includes a beam deceleration means for decelerating the ion beam for producing a low energy ion beam. The beam deceleration optics further includes a beam steering means for generating an electrostatic field for steering the ion beam to a targeted ion-beam direction and separating neutralized particles from the ion beam by allowing the neutralized particles to transmit in a neutralized-particle direction slightly different from the targeted ion-beam direction.Type: GrantFiled: February 25, 2000Date of Patent: March 23, 2004Assignee: Advanced Ion Beam Technology, Inc.Inventors: Jiong Chen, Peiching Ling
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Patent number: 6683711Abstract: A wavelength selective light source is disclosed. The wavelength selective light source comprises a broadband light source producing light having a plurality of wavelengths and a demultiplexer that receives the light and separates at least one of the plurality of wavelengths from said light. Further, a multiplexer is included for coupling the at least one of said plurality of wavelengths into an output waveguide. Finally, a semiconductor optical amplifier is provided that receives the at least one of the plurality of wavelengths from the output waveguide and amplifies the at least one of the plurality of wavelengths.Type: GrantFiled: December 23, 2002Date of Patent: January 27, 2004Assignee: Integrated Optics Communications CorporationInventors: Jianjun Zhang, Peiching Ling, Jinliang Chen, Ming Xu
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Publication number: 20030198259Abstract: A wavelength selective light source is disclosed. The wavelength selective light source comprises a broadband light source producing light having a plurality of wavelengths and a demultiplexer that receives the light and separates at least one of the plurality of wavelengths from said light. Further, a multiplexer is included for coupling the at least one of said plurality of wavelengths into an output waveguide. Finally, a semiconductor optical amplifier is provided that receives the at least one of the plurality of wavelengths from the output waveguide and amplifies the at least one of the plurality of wavelengths.Type: ApplicationFiled: December 23, 2002Publication date: October 23, 2003Inventors: Jianjun Zhang, Peiching Ling, Jinliang Chen, Ming Xu
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Patent number: 6628858Abstract: An all-optical switch with wavelength conversion is disclosed. The optical switch comprises an input waveguide for carrying a multiplexed optical signal comprised of a plurality of wavelength channels. Further included is a demultiplexer for separating the multiplexed optical signal into the plurality of wavelength channels. The wavelength channels are then provided to a wavelength converter operative to convert the wavelength channels into a converted wavelength channel. The converted wavelength channels are input to a switch operative to switch the converted wavelength channels onto output waveguides.Type: GrantFiled: December 19, 2002Date of Patent: September 30, 2003Assignee: Integrated Optics Communications CorporationInventors: Jianjun Zhang, Peiching Ling, Jinliang Chen, Ming Xu
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Publication number: 20030179998Abstract: A wavelength-selective optical filter is described. The filter includes an input waveguide for carrying a multiplexed optical signal that includes a plurality of wavelength channels. Further, an output waveguide is placed to the input waveguide, the output waveguide having a Bragg grating filter formed thereon. The input waveguide and the output waveguide is separated by a gap distance when said filter is in an off state. Finally, means for displacing the Bragg grating filter sufficiently towards the input waveguide when the filter is in an on state such that the Bragg grating filter can selectively extract one of the plurality of wavelength channels.Type: ApplicationFiled: March 22, 2002Publication date: September 25, 2003Inventors: Jianjun Zhang, Peiching Ling, Jinliang Chen, Ming Xu
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Patent number: 6608715Abstract: A wavelength converter is disclosed. The converter comprises a broadband light source producing light having a plurality of wavelengths. Further, a semiconductor optical amplifier is provided that receives the light from the light source. The semiconductor optical amplifier amplifies the light under the control of a control signal related to an optical signal of a first wavelength. Next, a demultiplexer receives the output of the semiconductor optical amplifier and extracts from the amplified optical signal at least one of the plurality of wavelengths.Type: GrantFiled: September 26, 2002Date of Patent: August 19, 2003Assignee: Integrated Optics Communications CorporationInventors: Jianjun Zhang, Peiching Ling, Jinliang Chen, Ming Xu
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Publication number: 20030152315Abstract: The present invention discloses an optical switching element that uses reversible electroplating mirrors includes a trench with transparent sidewalls located at the intersection of two waveguides A and B. The trench has two electrodes; one, which is transparent, is placed on the trench sidewall and the other is placed on the trench floor. The trench is filled with an index-matching electrolytic solution containing ions of a metal that can electro-deposit on these two electrodes. To actuate the switching element, a negative electrical potential is applied to the sidewall electrode. Actuation causes metal deposits to form on the sidewall electrode, creating a mirror that reflects light from waveguide A to waveguide B. To deactivate the switching element, a positive electrical potential is applied to the sidewall electrode. Deactivation causes metal deposits move off the sidewall and form on the trench floor.Type: ApplicationFiled: February 5, 2002Publication date: August 14, 2003Applicant: OPLUX, INC.Inventors: Jiangjun Zhang, Peiching Ling, Jinliang Chen, Ming Xu
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Publication number: 20030128918Abstract: An all-optical switch with wavelength conversion is disclosed. The optical switch comprises an input waveguide for carrying a multiplexed optical signal comprised of a plurality of wavelength channels. Further included is a demultiplexer for separating the multiplexed optical signal into the plurality of wavelength channels. The wavelength channels are then provided to a wavelength converter operative to convert the wavelength channels into a converted wavelength channel. The converted wavelength channels are input to a switch operative to switch the converted wavelength channels onto output waveguides.Type: ApplicationFiled: December 19, 2002Publication date: July 10, 2003Inventors: Jianjun Zhang, Peiching Ling, Jinliang Chen, Ming Xu
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Publication number: 20030123798Abstract: The present invention discloses an optical wavelength-selective switch. The switching function is based on electrostatic bending, or moving, of a part of a waveguide with an integrated Bragg grating to control the light-signal coupling to another waveguide. The electrostatic force is introduced by voltages applied to two electrodes, one embedded in a movable waveguide and the other on another waveguide. When these two waveguides are electro-statically moved close enough, the wavelength that meets the Bragg phase-matching condition is coupled from one waveguide to the waveguide with integrated Bragg gratings. Through the coupling, the selected wavelength is then directed into a desired output waveguide.Type: ApplicationFiled: July 5, 2002Publication date: July 3, 2003Inventors: Jianjun Zhang, Peiching Ling, Jinliang Chen, Ming Xu