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Optical Engineering

Grating-based 40-Gbit/s optical code-division multiplexing system incorporating a nonlinear amplifying loop mirror
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Paper Abstract

A seven-chip, 280-Gchip/s OCDM system incorporating quaternary phase coding and decoding is experimentally demonstrated. The encoder and decoder, consisting of superstructured fiber Bragg gratings, are fabricated using the equivalent-phase-shift method; only ordinary phase masks and submicrometer precision in control are required. Interchannel interference noise is also considered and evaluated; 40-Gbit/s×2-channel multiplexing is demonstrated. In addition, a nonlinear amplifying loop mirror (NALM) within the receiver is introduced to improve the system performance under two-channel operation. Switching is obtained for peak signal power less than 10 mW. We show that the NALM can act as a nonlinear processing element capable of reducing both the pedestal associated with conventional matched filtering and the width of the associated code recognition pulse.

Paper Details

Date Published: 1 January 2007
PDF: 5 pages
Opt. Eng. 46(1) 015006 doi: 10.1117/1.2424917
Published in: Optical Engineering Volume 46, Issue 1
Show Author Affiliations
Xiaogang Chen, Huazhong Univ. of Science and Technology (China)
Dexiu Huang, Huazhong Univ. of Science and Technology (China)
Xiuhua Yuan, Huazhong Univ. of Science and Technology (China)
Ge Xia, Huazhong Univ. of Science and Technology (China)

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