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This paper reports ultrafast birefringence dynamics in a semiconductor optical amplifier on subpicosecond or even femtosecond time scales. This is due to the carrier momentum orientation relaxation, induced by a polarized short optical pulse
Wavelength conversion based on the cross-polarization modulation (XPM) in a single semiconductor optical amplifier (SOA) has been numerically investigated by using the theoretical model in which the birefringence has been taken into account. The results show that the non-inverted and inverted wavelength conversion can be realized through selecting reasonably the parameters; there exit some differences...
An InAs0.155P0.845 metamorphic substrate is used to increase the long-wavelength range of tensile strained quantum-wells used in polarization-insensitive semiconductor optical amplifiers. The peak emission of the amplified spontaneous emission occurs on the light-hole sub-band at wavelength longer than 1640 nm. In addition, the metamorphic substrate reduces the degree of lateral composition modulation...
We demonstrate a bandgap-engineered dynamic monolithic MZI SOA all-optical switch with wide stripe selective area MOVPE. Compared with other simple laser-EAM integration with other bandgap engineering techniques, it is the largest working device ever achieved. All-optical wavelength conversion was achieved with single SOA all-optical modulation. In all-optical switching with differential phase technique,...
XGM based wavelength conversion was investigated using two SOAs with different lengths employing counter-propagating assist light. It was confirmed that the converted signal had a smaller chirp for the shorter SOA.
A study is presented on wavelength conversion in semiconductor optical amplifier (SOA) when the power of the input pump light is as much as that of the input signal light, in which the four-wave mixing (FWM) effect and the cross-gain modulation (XGM) effect occur obviously at the same time and the modulation format of the converted signal light is inverted to that of the input signal light. Experimental...
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