1 January 2007 Grating-based 40-Gbit/s optical code-division multiplexing system incorporating a nonlinear amplifying loop mirror
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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.
Xiaogang Chen, Dexiu Huang, Xiuhua Yuan, Ge Xia, "Grating-based 40-Gbit/s optical code-division multiplexing system incorporating a nonlinear amplifying loop mirror," Optical Engineering 46(1), 015006 (1 January 2007). https://doi.org/10.1117/1.2424917
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