Patents by Inventor Qingzhong Cai
Qingzhong Cai 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: 10009108Abstract: An apparatus adapted to operate a pluggable optical transceiver in a plurality of modulation schemes includes core circuitry adapted to interface with a host device, wherein the host device is adapted to support the pluggable optical transceiver; direct detection modulation circuitry communicatively coupled to the core circuitry; coherent modulation circuitry communicatively coupled to the core circuitry; and selection circuitry adapted to operate one of the direct detection modulation circuitry and the coherent modulation circuitry based on a selection depending on an application of the pluggable optical transceiver.Type: GrantFiled: September 13, 2016Date of Patent: June 26, 2018Assignee: Menara Networks, Inc.Inventors: Salam Elahmadi, Siraj Nour Elahmadi, George H. Buabbud, Gabriel E. Cardona, Qingzhong Cai, Qing Zhang, Barry Coles
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Publication number: 20170279533Abstract: A pluggable optical transceiver interface module adapted to operate in a host device includes a housing compliant to a first Multi Source Agreement (MSA), wherein the housing is adapted to plug into the host device; a slot in the housing adapted to receive a pluggable optical transceiver, wherein the pluggable optical transceiver includes an optical transmitter and an optical receiver with associated connectors; and interface circuitry communicatively coupled to the pluggable optical transceiver and to the host device, wherein the interface circuitry is adapted to bridge data and power connectivity to the pluggable optical transceiver according to the first MSA, and wherein the pluggable optical transceiver is not compliant to the first MSA.Type: ApplicationFiled: March 22, 2016Publication date: September 28, 2017Applicant: Menara Networks, Inc.Inventors: Siraj Nour ELAHMADI, Salam ELAHMADI, Gabriel E. CARDONA, Qingzhong CAI
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Patent number: 9729947Abstract: Systems and methods for conveying wavelength tuning information from a pluggable optical transceiver to a host device determining the wavelength tuning information of the pluggable optical transceiver operating in the host device; appending the wavelength tuning information as part of existing data communicated between the pluggable optical transceiver and the host device; and providing the existing data with the wavelength tuning information incorporated therewith to the host device.Type: GrantFiled: January 12, 2016Date of Patent: August 8, 2017Assignee: Menara Networks, Inc.Inventors: Siraj Nour Elahmadi, Qingzhong Cai, Fredrick Muya, Paul Tuok, Salam Elahmadi
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Publication number: 20170201812Abstract: Systems and methods for conveying wavelength tuning information from a pluggable optical transceiver to a host device determining the wavelength tuning information of the pluggable optical transceiver operating in the host device; appending the wavelength tuning information as part of existing data communicated between the pluggable optical transceiver and the host device; and providing the existing data with the wavelength tuning information incorporated therewith to the host device.Type: ApplicationFiled: January 12, 2016Publication date: July 13, 2017Applicant: Menara Networks, Inc.Inventors: Siraj Nour ELAHMADI, Qingzhong CAI, Fredrick MUYA, Paul TUOK, Salam ELAHMADI
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Publication number: 20160380698Abstract: An apparatus adapted to operate a pluggable optical transceiver in a plurality of modulation schemes includes core circuitry adapted to interface with a host device, wherein the host device is adapted to support the pluggable optical transceiver; direct detection modulation circuitry communicatively coupled to the core circuitry; coherent modulation circuitry communicatively coupled to the core circuitry; and selection circuitry adapted to operate one of the direct detection modulation circuitry and the coherent modulation circuitry based on a selection depending on an application of the pluggable optical transceiver.Type: ApplicationFiled: September 13, 2016Publication date: December 29, 2016Inventors: Salam ELAHMADI, Siraj Nour ELAHMADI, George H. BUABBUD, Gabriel E. CARDONA, Qingzhong CAI, Qing ZHANG, Barry COLES
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Patent number: 8886034Abstract: The present invention provides systems and methods for a receiver threshold optimization loop to provide self-contained automatic adjustment in a compact module, such as a pluggable optical transceiver. The receiver threshold optimization loop utilizes a performance metric associated with the receiver, such as FEC, to optimize performance of the receiver. The receiver is optimized through a change in the receiver threshold responsive to the performance metric. Advantageously, the present invention provides improved receiver performance through a continuous adjustment that is self-contained within the receiver, such as within a pluggable optical transceiver compliant to a multi-source agreement (MSA). The receiver threshold optimization loop can include a fine and a coarse sweep of adjustment from an initial setting.Type: GrantFiled: July 20, 2012Date of Patent: November 11, 2014Assignee: Menara Networks, Inc.Inventors: Qingzhong Cai, Xiaoguang Sun, Gabriel E. Cardona
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Publication number: 20120281992Abstract: The present invention provides systems and methods for a receiver threshold optimization loop to provide self-contained automatic adjustment in a compact module, such as a pluggable optical transceiver. The receiver threshold optimization loop utilizes a performance metric associated with the receiver, such as FEC, to optimize performance of the receiver. The receiver is optimized through a change in the receiver threshold responsive to the performance metric. Advantageously, the present invention provides improved receiver performance through a continuous adjustment that is self-contained within the receiver, such as within a pluggable optical transceiver compliant to a multi-source agreement (MSA). The receiver threshold optimization loop can include a fine and a coarse sweep of adjustment from an initial setting.Type: ApplicationFiled: July 20, 2012Publication date: November 8, 2012Inventors: Qingzhong CAI, Xiaoguang SUN, Gabriel E. CARDONA
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Patent number: 8249447Abstract: The present invention provides systems and methods for a receiver threshold optimization loop to provide self-contained automatic adjustment in a compact module, such as a pluggable optical transceiver. The receiver threshold optimization loop utilizes a performance metric associated with the receiver, such as FEC, to optimize performance of the receiver. The receiver is optimized through a change in the receiver threshold responsive to the performance metric. Advantageously, the present invention provides improved receiver performance through a continuous adjustment that is self-contained within the receiver, such as within a pluggable optical transceiver compliant to a multi-source agreement (MSA). The receiver threshold optimization loop can include a fine and a coarse sweep of adjustment from an initial setting.Type: GrantFiled: April 29, 2008Date of Patent: August 21, 2012Assignee: Menara Networks, Inc.Inventors: Qingzhong Cai, Xiaoguang Sun, Gabriel E. Cardona
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Publication number: 20090269076Abstract: The present invention provides systems and methods for a receiver threshold optimization loop to provide self-contained automatic adjustment in a compact module, such as a pluggable optical transceiver. The receiver threshold optimization loop utilizes a performance metric associated with the receiver, such as FEC, to optimize performance of the receiver. The receiver is optimized through a change in the receiver threshold responsive to the performance metric. Advantageously, the present invention provides improved receiver performance through a continuous adjustment that is self-contained within the receiver, such as within a pluggable optical transceiver compliant to a multi-source agreement (MSA). The receiver threshold optimization loop can include a fine and a coarse sweep of adjustment from an initial setting.Type: ApplicationFiled: April 29, 2008Publication date: October 29, 2009Inventors: Qingzhong CAI, Xiaoguang Sun, Gabriel E. Cardona
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Publication number: 20070268485Abstract: A method for remotely detecting whether a subject is alive, comprising the steps of determining a calibration spectral signature for light reflectance from living skin, normalizing the calibration spectral signature values to the calibration reflectance value at a reference wavelength, storing the normalized calibration spectral signature, determining a subject spectral signature of the light reflectance of a region of skin of the subject whose liveness is to be determined, normalizing the subject spectral signature values to the subject reflectance value at the reference wavelength, comparing the normalized subject spectral signature with the normalized calibration spectral signature for at least one wavelength, generating a subject liveness signal based on the comparison of the normalized subject spectral signature with the normalized calibration spectral signature, and emitting the subject liveness signal.Type: ApplicationFiled: December 7, 2005Publication date: November 22, 2007Applicant: Clean Earth Technologies, LLCInventors: Leonid Polonskiy, Jeffry Golden, Clinton Boyd, Arie Kaplan, Lawrence Hanebrink, Qingzhong Cai, Andrew Cilia
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Patent number: 7092633Abstract: A system and method for configuring lightpaths within an optical circuit wherein the source node stores requests for a lightpath between the source node and the destination node. Upon receipt of a token at the source node indicating an available space within a wavelength, the source node selects a request stored within the queue based upon a best fit window protocol. A lightpath is then established between the source node and the destination node responsive to a selected request.Type: GrantFiled: November 14, 2001Date of Patent: August 15, 2006Assignee: University of Texas System Board of RegentsInventors: Andrea Fumagalli, Qingzhong Cai
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Publication number: 20020126343Abstract: A system and method for configuring lightpaths within an optical circuit wherein the source node stores requests for a lightpath between the source node and the destination node. Upon receipt of a token at the source node indicating an available space within a wavelength, the source node selects a request stored within the queue based upon a best fit window protocol. A lightpath is then established between the source node and the destination node responsive to a selected request.Type: ApplicationFiled: November 14, 2001Publication date: September 12, 2002Inventors: Andrea Fumagalli, Qingzhong Cai