Title :
Reducing crosstalk and signal distortion in wavelength-division multiplexing by increasing carrier lifetimes in semiconductor optical amplifiers
Author :
Xu, Shuangmei ; Khurgin, Jacob B. ; Vurgaftman, Igor ; Meyer, Jerry R.
Author_Institution :
Dept. of Electr. & Comput. Eng., Johns Hopkins Univ., Baltimore, MD, USA
fDate :
6/1/2003 12:00:00 AM
Abstract :
A simple theory for the crosstalk in multichannel wavelength-division multiplexing (WDM) communication systems caused by the cross gain saturation in semiconductor optical amplifier (SOA) is developed. It is shown that increasing the carrier recombination lifetime while reducing the differential gain in the SOA greatly mitigates the crosstalk. An SOA using type-II quantum wells with reduced recombination probability is designed, and its characteristics are numerically modeled for a number of different WDM systems. It is shown that when used as a preamplifier or in local/metro networks with a small number of amplifiers, error-free transmission can be achieved with the type-II SOA.
Keywords :
electron-hole recombination; local area networks; metropolitan area networks; optical crosstalk; optical saturation; optical transmitters; preamplifiers; probability; quantum well lasers; semiconductor device models; semiconductor optical amplifiers; wavelength division multiplexing; LAN; carrier lifetimes; carrier recombination lifetime; crosstalk reduction; differential gain; error-free transmission; metro networks; multichannel WDM communication systems; multichannel wavelength-division multiplexing communication systems; semiconductor optical amplifier; signal distortion; type-II quantum well laser; wavelength-division multiplexing; Charge carrier lifetime; Communication systems; Crosstalk; Numerical models; Optical amplifiers; Optical distortion; Preamplifiers; Radiative recombination; Semiconductor optical amplifiers; Wavelength division multiplexing;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2003.812721
