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Optical 2R remodulator using feedforward control of semiconductor optical amplifier gain
Author(s) -
Conforti Evandro,
Bordonalli Aldário C.,
Ho Steven,
Kang SungMo Steve
Publication year - 1999
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(19990405)21:1<39::aid-mop10>3.0.co;2-u
Subject(s) - optical amplifier , optical parametric amplifier , extinction ratio , feed forward , optics , fully differential amplifier , automatic gain control , direct coupled amplifier , amplifier , physics , instrumentation amplifier , materials science , optoelectronics , operational amplifier , engineering , laser , wavelength , cmos , control engineering
Abstract A technique for optical pulse regeneration and reshaping using feedforward current injection in a semiconductor optical amplifier is reported. By matching the shape and phase of the injected current and the incoming optical pulse, the optical amplifier gain is set to increase with the amplifier input optical signal level, resulting in an enhanced extinction ratio for the output pulse. It has been experimentally demonstrated that a proper forward gain control improves the output extinction ratio by more than 5 dB for a system where the optical amplifier gain dynamics limits the maximum pulse rate to 500 Mbits/s. ©1999 John Wiley & Sons, Inc. Microwave Opt Technol Lett 21: 39–42, 1999.