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Comparison between optical SCM systems using semiconductor laser diode or intensity external modulator at the transmitter
Author(s) -
Betti S.,
Bravi E.,
Giaconi M.
Publication year - 1998
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/(sici)1098-2760(199805)18:1<23::aid-mop6>3.0.co;2-k
Subject(s) - optics , subcarrier multiplexing , laser diode , semiconductor , optoelectronics , semiconductor laser theory , physics , optical modulator , modulation (music) , electro absorption modulator , laser , subcarrier , telecommunications , phase noise , phase modulation , engineering , quantum dot laser , orthogonal frequency division multiplexing , acoustics , channel (broadcasting)
A comparison is presented concerning the use of a semiconductor laser or intensity external modulator at the transmitter of hybrid AM/QAM subcarrier multiplexed optical transmission systems. In the first case, several effects are considered, which give rise to different distortion phenomena: intrinsic “dynamic” distortions due to the interaction of photons and electrons in a semiconductor laser, clipping impulsive noise, an AM–FM conversion effect due to the joint action of semiconductor laser chirping fiber chromatic dispersion, and nonlinear distortions due to the Kerr effect. In the case of an external intensity modulator, the distortion noise due to its intrinsic nonlinear response is analyzed. The analysis provides useful information about the design and the performance evaluation of SCM‐based optical access networks. © 1998 John Wiley & Sons, Inc. Microwave Opt Technol Lett 18: 23–27, 1998.