Resumes
Resumes
Yiqing Zhu Phones & Addresses
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Mountain View, CA
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Cupertino, CA
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Pittsburgh, PA
Publications
Us Patents
Wavelength Division Multiplex/Demultiplexing Device
View pageUS Patent:
6525846, Feb 25, 2003
Filed:
Oct 31, 2000
Appl. No.:
09/702137
Inventors:
Dapeng Yan - Pleasanton CA
Yiqing Zhu - Pleasanton CA
William D. Sterling - Dublin CA
Yiqing Zhu - Pleasanton CA
William D. Sterling - Dublin CA
Assignee:
Aoc Technologies, Inc. - Dublin CA
International Classification:
G02B 532
US Classification:
359 15, 359 22, 359 24, 359566, 359129, 359130, 359124, 359900
Abstract:
A wavelength division multiplexing device and method includes two prisms having a pair of coated, highly reflective opposed faces forming an etalon. A volume phase grating is sandwiched between the two prisms. The volume phase grating is positioned between the highly reflective opposed face portions so that a light beam incident on the etalon undergoes a preselected number of multiple reflections between the highly reflective face portions and a preselected number of traversals through the volume diffraction grating, whereby wavelengths satisfying a Bragg condition on each traversal are diffracted out of the volume grating means. One prism may be designed to separate TE and TM polarized light, and the other prism may be designed to combine the TE and TM modes so that the result is polarization independent. Each prism includes at least one transparent output face through which the separately diffracted wavelengths are transmitted at respective angles. An array of detectors is disposed at the output face to received the separately diffracted wavelengths.
Guaranteeing Bandwidth For Dual-Homed Hosts In Fabric Extender Topologies
View pageUS Patent:
20150215169, Jul 30, 2015
Filed:
Jan 24, 2014
Appl. No.:
14/163313
Inventors:
- San Jose CA, US
Rajagopal Subramaniyan - San Jose CA, US
Lalitha Krishnan - Cupertino CA, US
Narasimhan G. Mandeyam - San Jose CA, US
Yiqing Zhu - Fremont CA, US
Kalyan Ghosh - Saratoga CA, US
Dean Houari - Tokyo, JP
Rajagopal Subramaniyan - San Jose CA, US
Lalitha Krishnan - Cupertino CA, US
Narasimhan G. Mandeyam - San Jose CA, US
Yiqing Zhu - Fremont CA, US
Kalyan Ghosh - Saratoga CA, US
Dean Houari - Tokyo, JP
Assignee:
Cisco Technology, Inc. - San Jose CA
International Classification:
H04L 12/24
Abstract:
Techniques are provided for optimizing bandwidth in a network. Information describing a network bandwidth capacity of a port extender device is received at a switch. The port extender device is connected to the switch. The port extender device is configured to provide ports for the switch. The network bandwidth capacity of the port extender device is compared to a minimum network bandwidth guarantee threshold. If the switch determines that the network bandwidth capacity of the port extender device is below the minimum network guarantee threshold, the switch sends to the port extender device a message configured to cause the port extender to deactivate one or more links between the port extender device and one or more servers in communication with the port extender device.