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Variable All-optical Shift Register

*Abstract: There has been tremendous progress in research and commercialization of dense wavelength division multiplexing (DWDM) optical fiber communications. Transmission capacity as high as 10 terabits/second through a single fiber has been demonstrated in the laboratory. This huge capacity can create enormous data traffic congestion at major interconnections. An all-optical packet switched network can potentially eliminate this major bottleneck by allowing the data packets to route through the network without optoelectronic conversion. One of the most important components in a router is a buffer. A buffer must be able to store data packets for a substantial period of time and must be able to release the data within an acceptable delay when the switch is clear for routing.

Researchers at the University of California, Berkeley have developed a novel concept for an all-optical buffer with variable memory, based on slowing the group velocity of the optical data packet in the buffer wtih a controlled reduction, such that it is effectively an optical memory. By varying the group velocity reduction factor, the memory length and the delay time can be adjusted.

*Principal Investigation: Name: Connie Chang-Hasnain
Department:

Name: Pei-Cheng Ku
Department:

附加資料: Patent Number: US6900920B2
Application Number: US2002251917A
Inventor: Chang Hasnain, Connie J. | Ku, Pei Cheng
Priority Date: 21 Sep 2001
Priority Number: US6900920B2
Application Date: 20 Sep 2002
Publication Date: 31 May 2005
IPC Current: G02F000135 | H01S0005026 | H01S000550 | H01S000500 | H01S000510 | H01S000534
US Class: 359244 | 359247 | 359248 | 359255
Assignee Applicant: The Regents of the University of California
Title: Variable semiconductor all-optical buffer using slow light based on electromagnetically induced transparency
Usefulness: Variable semiconductor all-optical buffer using slow light based on electromagnetically induced transparency
Summary: The invention is used for storing data packets in all-optical communications and optical-signal processing.
Novelty: Optical buffering device used for storing data packets in all-optical communications and optical-signal processing, includes semiconductor material for slowing optical signal

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