Patents by Inventor Yunqu Liu

Yunqu Liu 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).

  • Patent number: 11095961
    Abstract: Today's communications require an effective yet scalable way interconnection of data centers and warehouse scale computers (WSCs) whilst operators must provide a significant portion of data center and WSC applications free of charge to users and consumers. At present, data center operators face the requirement to meet exponentially increasing demand for bandwidth without dramatically increasing the cost and power of the infrastructure employed to satisfy this demand. Simultaneously, consumer expectations of download/upload speeds and latency in accessing content provide additional pressure. Accordingly, the inventors provide a number of optical switching fabrics which reduce the latency and microprocessor loading arising from the prior art Internet Protocol multicasting techniques.
    Type: Grant
    Filed: July 14, 2020
    Date of Patent: August 17, 2021
    Assignee: Viscore Technology Inc.
    Inventors: Yunqu Liu, Kin-Wai Leong
  • Publication number: 20210021915
    Abstract: Today's communications require an effective yet scalable way interconnection of data centers and warehouse scale computers (WSCs) whilst operators must provide a significant portion of data center and WSC applications free of charge to users and consumers. At present, data center operators face the requirement to meet exponentially increasing demand for bandwidth without dramatically increasing the cost and power of the infrastructure employed to satisfy this demand. Simultaneously, consumer expectations of download/upload speeds and latency in accessing content provide additional pressure. Accordingly, the inventors provide a number of optical switching fabrics which reduce the latency and microprocessor loading arising from the prior art Internet Protocol multicasting techniques.
    Type: Application
    Filed: July 14, 2020
    Publication date: January 21, 2021
    Inventors: YUNQU LIU, KIN-WAI LEONG
  • Patent number: 9621967
    Abstract: Optical networking has become ubiquitous in providing low cost, high speed communications networks supporting our communication needs from FTTH through long haul to undersea. The large number of users and high speeds provided to each user fiber mean that information retrieval and routing functionality within the data centers hosting this information can become the bottleneck both in terms of speed and latency. According to embodiments of the invention the inventors present architectures based upon all-optical passive optical networks that support a distributive approach to latency reduction as well as protocols relating to their deployment. Beneficially, such POCXN concepts exploit optical components already supported by high volume manufacturing techniques as well as CWDM/DWDM techniques for throughput increase.
    Type: Grant
    Filed: November 26, 2013
    Date of Patent: April 11, 2017
    Assignee: VISCORE TECHNOLOGIES
    Inventors: Yunqu Liu, Kin-Wai Leong, Wenda Ni, Changcheng Huang
  • Publication number: 20170093517
    Abstract: A hybrid optical electronic mapper-shuffler-reducer structure is presented to enhance the interconnection of current multi-dimensional direct networks. The physically intrinsic multicast design of the hybrid optical electronic mapper-shuffler-reducer structure of the present disclosure naturally supports parallel traffic modes such as multicast, broadcast and newly developed incast, while easily supporting point-to-point traffic. By scaling up this architecture, using a simple multi-dimensional topology, a remarkably massive network can be achieved with only 3 hops end-to-end latency. Compared to other multi-dimensional direct networks, the latency is substantially improved and is also made more uniform.
    Type: Application
    Filed: May 13, 2015
    Publication date: March 30, 2017
    Inventors: YUNQU LIU, KIN-WAI LEONG, WENDA NI, CHANGCHENG HUANG
  • Patent number: 9223092
    Abstract: The performance, reliability, and cost of the optical couplers depends heavily on their design and packaging technologies. A need still exists in the art of design and manufacturing of optical coupler devices to provide superior performance, improved reliability and reduced cost simultaneously while addressing issues such as walk-off. Such improvements arising from the inclusion of asymmetric optical elements within the optical path rather than the circularly symmetric optical elements within the prior art.
    Type: Grant
    Filed: June 11, 2013
    Date of Patent: December 29, 2015
    Inventors: Yunqu Liu, Kin-Wai Leong
  • Publication number: 20150296278
    Abstract: Optical networking has become ubiquitous in providing low cost, high speed communications networks supporting our communication needs from FTTH through long haul to undersea. The large number of users and high speeds provided to each user fiber mean that information retrieval and routing functionality within the data centers hosting this information can become the bottleneck both in terms of speed and latency. According to embodiments of the invention the inventors present architectures based upon all-optical passive optical networks that support a distributive approach to latency reduction as well as protocols relating to their deployment. Beneficially, such POCXN concepts exploit optical components already supported by high volume manufacturing techniques as well as CWDM/DWDM techniques for throughput increase.
    Type: Application
    Filed: November 26, 2013
    Publication date: October 15, 2015
    Inventors: Yunqu Liu, Kin-Wai Leong, Wenda Ni, Changcheng Huang
  • Publication number: 20150233785
    Abstract: The deep penetration of optical transmission from the very edges of the network with optical access networks to the very core with routing data within data centers before transmission has resulted in competing demands for increased functionality, reduced cost, enhanced manufacturability, and reduced footprint. At the same time monitoring and fault detection with prior art optical time domain reflectometry systems have not kept up to the demands of these networks and systems as they are expensive test equipment based solutions. It would be beneficial to provide embedded OTDR functionality within each transmitter, receiver or transceiver deployed within the network allowing every link to be monitored continuously. It would be further beneficial for such embedded OTDRs to meet the demands for lower cost, high volumes, and smaller footprints with enhanced manufacturability.
    Type: Application
    Filed: February 18, 2015
    Publication date: August 20, 2015
    Inventors: Yunqu Liu, Kin-Wai Leong
  • Patent number: 8941911
    Abstract: Doped fiber amplifiers (DFA) using rare-earth doping materials with linear and non-linear interactions between the optical signal to be amplified and the pump laser have become a standard element of optical telecommunications systems for multiple applications including for example extending the reach of optical links before opto-electronic conversion is required or support increased fanout. However, in many applications wherein multiple DFAs are employed the electrical power budget wherein the pump laser diode (LD) represents approximately 25% of the module power consumption directly, and closer to approximately 40-50% once the control and drive electronics for the thermoelectric cooler and LD are included. Accordingly, it would be beneficial to reduce the overall power consumption of a DFA by exploiting unused optical pump power such that multiple gain stages, within the same or different DFAs, may be driven from a single pump LD.
    Type: Grant
    Filed: November 15, 2013
    Date of Patent: January 27, 2015
    Assignee: Viscore Technologies Inc.
    Inventors: Yunqu Liu, Kin-Wai Leong
  • Patent number: 8937768
    Abstract: An optical component has a lens including a further optical component therein. The further optical component acts upon light propagating within a portion of the lens but not on light propagating within a second other portion of the lens. A simple configuration involves a lens having a slot for having the optical component inserted therein. Optical components including the lens with further optical component include beam splitters and beam combiners.
    Type: Grant
    Filed: May 4, 2011
    Date of Patent: January 20, 2015
    Assignee: Viscore Technologies Inc.
    Inventors: Wenlu Wang, Kinwai Leong, Yunqu Liu
  • Publication number: 20140139908
    Abstract: Doped fiber amplifiers (DFA) using rare-earth doping materials with linear and non-linear interactions between the optical signal to be amplified and the pump laser have become a standard element of optical telecommunications systems for multiple applications including for example extending the reach of optical links before opto-electronic conversion is required or support increased fanout. However, in many applications wherein multiple DFAs are employed the electrical power budget wherein the pump laser diode (LD) represents approximately 25% of the module power consumption directly, and closer to approximately 40-50% once the control and drive electronics for the thermoelectric cooler and LD are included. Accordingly, it would be beneficial to reduce the overall power consumption of a DFA by exploiting unused optical pump power such that multiple gain stages, within the same or different DFAs, may be driven from a single pump LD.
    Type: Application
    Filed: November 15, 2013
    Publication date: May 22, 2014
    Inventors: Yunqu Liu, Kin-Wai Leong
  • Publication number: 20130330039
    Abstract: The performance, reliability, and cost of the optical couplers depends heavily on their design and packaging technologies. A need still exists in the art of design and manufacturing of optical coupler devices to provide superior performance, improved reliability and reduced cost simultaneously whilst addressing issues such as walk-off. Such improvements arising from the inclusion of asymmetric optical elements within the optical path rather than the circularly symmetric optical elements within the prior art.
    Type: Application
    Filed: June 11, 2013
    Publication date: December 12, 2013
    Inventors: Yunqu Liu, Kin-Wai Leong
  • Publication number: 20110273772
    Abstract: An optical component is disclosed having a lens including a further optical component therein. The further optical component acts upon light propagating within a portion of the lens but not on light propagating within a second other portion of the lens. A simple configuration involves a lens having a slot for having the optical component inserted therein.
    Type: Application
    Filed: May 4, 2011
    Publication date: November 10, 2011
    Applicant: VISCORE TECHNOLOGIES INC.
    Inventors: Wenlu Wang, Kinwai Leong, Yunqu Liu
  • Patent number: 7440172
    Abstract: An doped fiber optical amplifier featuring an optical component having first wavelength division multiplexer, an isolator and a second wavelength division multiplexer is described. The isolator supports the propagation of optical signals within a predetermined signal wavelength range in one direction. Pump signals having a wavelength within a pump wavelength range are diverted by the wavelength division multiplexers to inhibit coupling of the pump signals with the isolator. The optical amplifier supports the use of relatively high-powered optical pump lasers. The optical component is optically disposed between different lengths of doped fiber and serves to reduce optical noise within the amplifier.
    Type: Grant
    Filed: June 23, 2006
    Date of Patent: October 21, 2008
    Assignee: Viscore Technologies Inc.
    Inventor: Yunqu Liu
  • Publication number: 20070014514
    Abstract: An optical device featuring a first wavelength division multiplexer, an isolator and a second wavelength division multiplexer is described. The isolator supports the propagation of optical signals within a predetermined signal wavelength range in one direction. Pump signals having a wavelength within a pump wavelength range are diverted by the wavelength division multiplexers to inhibit coupling of the pump signals with the isolator.
    Type: Application
    Filed: June 23, 2006
    Publication date: January 18, 2007
    Applicant: Viscore Technologies Inc.
    Inventor: Yunqu Liu
  • Publication number: 20070009263
    Abstract: An doped fiber optical amplifier featuring an optical component having first wavelength division multiplexer, an isolator and a second wavelength division multiplexer is described. The isolator supports the propagation of optical signals within a predetermined signal wavelength range in one direction. Pump signals having a wavelength within a pump wavelength range are diverted by the wavelength division multiplexers to inhibit coupling of the pump signals with the isolator. The optical amplifier supports the use of relatively high-powered optical pump lasers. The optical component is optically disposed between different lengths of doped fiber and serves to reduce optical noise within the amplifier.
    Type: Application
    Filed: June 23, 2006
    Publication date: January 11, 2007
    Applicant: Viscore Technologies Inc.
    Inventor: Yunqu Liu