Title :
Noise characteristics of semiconductor-optical amplifiers used for wavelength conversion via cross-gain and cross-phase modulation
Author :
Obermann, K. ; Kindt, S. ; Breuer, D. ; Petermann, K. ; Schmidt, C. ; Diez, S. ; Weber, H.G.
Author_Institution :
Fachgebeit Hochfrequenztech., Tech. Univ. Berlin, Germany
fDate :
3/1/1997 12:00:00 AM
Abstract :
The amplified spontaneous emission of a semiconductor-optical amplifier saturated by two input waves is investigated theoretically and experimentally for both co- and counterpropagating injection. For the first time, an analytical expression for counterpropagating input waves is presented and compared with the copropagating case. It is shown, that copropagating injection can significantly reduce the noise level. The theoretical results are also compared with the experimental data and found to be in good agreement.
Keywords :
laser noise; optical frequency conversion; optical modulation; optical saturation; phase modulation; semiconductor lasers; superradiance; InGaAsP; amplified spontaneous emission; copropagating injection; counterpropagating injection; cross-gain; cross-phase modulation; input wave saturation; noise characteristics; noise level; semiconductor-optical amplifiers; wavelength conversion; Charge carrier density; Intensity modulation; Noise level; Optical amplifiers; Optical noise; Optical signal processing; Optical wavelength conversion; Semiconductor device noise; Semiconductor optical amplifiers; Spontaneous emission;
Journal_Title :
Photonics Technology Letters, IEEE
