Title :
Optical preamplifier using inverted signal of amplified spontaneous emission in saturated semiconductor optical amplifier
Author :
Yamatoya, T. ; Koyama, F.
Author_Institution :
MicroSystem Center, Precision & Intelligence Lab., Tokyo Inst. of Technol., Yokohama, Japan
fDate :
12/6/2001 12:00:00 AM
Abstract :
A novel optical preamplifier using the optical modulation of amplified spontaneous emission (ASE) in a semiconductor optical amplifier (SOA) is demonstrated. The input signal is converted to the modulation of the ASE due to saturation characteristic in an SOA. The receiver sensitivity was improved by 10 dB at 1 Gbit/s using the proposed preamplifier. The proposed device can not only amplify optical signal but also suppress the intensity noise of the input signal under saturation regime. The intensity noise of 1 Gbit/s spectrum-sliced light was significantly suppressed using the nonlinear characteristic of the preamplifier
Keywords :
error statistics; laser noise; optical fibre communication; optical fibre filters; optical modulation; optical receivers; optical saturation; preamplifiers; semiconductor optical amplifiers; sensitivity; superradiance; wavelength division multiplexing; 1 Gbit/s; amplified spontaneous emission; input signal; intensity noise; inverted signal; modulation; nonlinear characteristics; optical modulation; optical preamplifier; optical signal; preamplifier; receiver sensitivity; saturated semiconductor optical amplifier; saturation characteristic; saturation regime; semiconductor optical amplifier; spectrum-sliced light;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20011022
