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Traveling‐wave semiconductor laser amplifier induced intermodulation distortion for different digital modulation schemes in a subcarrier multiplexing system
Author(s) -
Lee YangHan,
Tsai ChaoNan,
Lee SanLiang,
Wu Jingshown
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.4650090206
Subject(s) - intermodulation , subcarrier , amplifier , frequency shift keying , subcarrier multiplexing , modulation (music) , electronic engineering , multiplexing , transmission (telecommunications) , amplitude modulation , transmission system , electrical engineering , physics , engineering , telecommunications , frequency modulation , acoustics , orthogonal frequency division multiplexing , radio frequency , demodulation , channel (broadcasting) , cmos
We analyze the intermodulation distcrtion (IMD) induced by four‐wave mixing in traveling‐wave semiconductor laser amplifiers (TWSLA) for different digital modulation schemes in a subcarrier multiplexing (SCM) system, and compare these results with the transmission of pure tones. We find that the IMDs are reduced in the digital modulation system, because the modulated signals disturb the homogeneous property of amplitude (ASK, FSK) or phase (PSK). We conclude that PSK has better performance, and the worst case is the transmission of pure tones. © 1995 John Wiley & Sons, Inc.