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Impact of spontaneous emission noise of optical amplifiers on the channel capacity of coherent SCM systems
Author(s) -
Wu JyhHorng,
Wu Jingshown,
Lee YangHan
Publication year - 1995
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.4650090104
Subject(s) - subcarrier multiplexing , optical amplifier , subcarrier , amplifier , electronic engineering , channel (broadcasting) , optical communication , physics , channel capacity , noise (video) , optical performance monitoring , phase noise , electrical engineering , wavelength division multiplexing , engineering , optics , computer science , orthogonal frequency division multiplexing , cmos , wavelength , laser , artificial intelligence , image (mathematics)
Analysis on the channel capacity of a coherent optical subcarrier multiplexing system using optical amplifiers is presented. The performance criterion, that is, the channel transport capability N, is derived in terms of carrier‐to‐noise ratio, input optical power, and optical amplifier gain. It is found that when the gain of the optical amplifier is large, the spontaneous emission noise limits the number of channels that can be transmitted in this system. As an example, when the gain is well above 20 dB and input optical power is −28 dBm, the maximum value of N is 46. In addition, the optimum phase modulation index is also presented. © 1995 John Wiley & Sons, Inc.