A novel structure of optical buffer

AiMing Liu; Chongqing Wu; Huali Gao; Yandong Gong; Ping Shum

doi:10.1117/12.571899

11 February 2005 A novel structure of optical buffer

AiMing Liu, Chongqing Wu, Huali Gao, Yandong Gong, Ping Shum

Proceedings Volume 5625, Optical Transmission, Switching, and Subsystems II; (2005) https://doi.org/10.1117/12.571899
Event: Asia-Pacific Optical Communications, 2004, Beijing, China

Abstract

Optical buffers are critical for low packet-loss probability in future photonic packet-switched networks. In particular, they would be required to store packets during rate conversion and header processing, and to overcome the receiver's bottleneck. They would be required for queuing packets while transmitters await access to the network. In this paper, we present a novel structure of optical buffer with compact size. This kind of optical buffer is based on a collinear 3x3 fiber coupler in which three fibers are completely in the same plane and weakly coupled. A SOA is used as its nonlinear element as well as an amplifier in it.The experiment result will be also given in the paper. Storage results obtained with this novel structure optical buffer at 100Mb/s will be presented first and then its capacity is extended to higher data rates of 2.5Gb/s, more compatible with present optical networks. Storage has been observed for time up to 1.568ms(more than 32 circulations) in both cases without obvious degration. The novel structure of optical buffer could be a more compact device which makes it possible to be integrated in a chip. SOA in the buffer is used as a nonlinear element as well as an amplifier to compensate loss in the buffer loop. The buffer needs low control power for switch operation. It is easy to control 'write' and 'erase' operation because the same TOAD switch in the buffer can be used for both 'write' and 'erase' operation.

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AiMing Liu, Chongqing Wu, Huali Gao, Yandong Gong, and Ping Shum "A novel structure of optical buffer", Proc. SPIE 5625, Optical Transmission, Switching, and Subsystems II, (11 February 2005); https://doi.org/10.1117/12.571899

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KEYWORDS

Fiber couplers

Switches

Data storage

Nonlinear optics

Fiber amplifiers

Optical amplifiers

Optical networks

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