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Optical Engineering

Study of a novel high-speed all-optical orthogonal modulation scheme based on frequency-shift keying and intensity-modulated labeling
Author(s): Minghao Li; Nan Chi; Wei Hong; Wei Li; Hong Liu; Dexiu Huang
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Paper Abstract

We propose and demonstrate a novel orthogonal optical labeling scheme based on 40-Gbit/s optical frequency-shift keying (FSK) payload and 2.5-Gbit/s intensity-modulated (IM) labeling. Using the technology of carrier-suppressed modulation and conversion of differential phase-shift keying to IM, only one light source is needed to generate the optical FSK signal. The system performance, including range of IM modulation depth, bit error ratio, and dispersion limitation, is carefully investigated by numerical simulation. With IM modulation depth of 0.4, the 40 Gbit/s FSK payload and 2.5-Gb/s IM label are transmitted over a 50-km standard single mode fiber (SMF) with 0.87 and 0.92 dB penalty and show immunity to input power range upto 11 and 15 dB, respectively. Optimal methods to improve the system performance are also proposed and discussed. After optimization, the IM modulation depth can be reduced to 0.2.

Paper Details

Date Published: 1 September 2008
PDF: 7 pages
Opt. Eng. 47(9) 095002 doi: 10.1117/1.2977526
Published in: Optical Engineering Volume 47, Issue 9
Show Author Affiliations
Minghao Li, Huazhong Univ. of Science and Technology (China)
Nan Chi, Huazhong Univ. of Science and Technology (China)
Wei Hong, Huazhong Univ. of Science and Technology (China)
Wei Li, Huazhong Univ. of Science and Technology (China)
Hong Liu, Huazhong Univ. of Science and Technology (China)
Dexiu Huang, Huazhong Univ. of Science and Technology (China)


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