Noise properties of nonlinear semiconductor optical amplifiers.
Noise properties of nonlinear semiconductor optical amplifiers.
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非线性半导体光放大器的噪声特性。
作者：
M. Shtaif;G. Eisenstein
我们用实验证明和分析描述了饱和半导体光放大器中两个重要的噪声贡献。首先是自发发射功率的增强，这是由于反演因子的增加和空间依赖性。第二个是由饱和信号和放大器噪声之间的非线性相互作用引起的，在光域中，在窄带宽上引起噪声谱的明显修改。这种修改表现为在被测电子域中噪声功率的降低。
We demonstrate experimentally and describe analytically two important noise contributions in saturated semiconductor optical amplifiers. The first is spontaneous emission power enhancement that is due to the increased and spatially dependent inversion factor. The second is caused by a nonlinear interaction between the saturating signal and the amplifier noise that, in the optical domain, causes a distinct modification of the noise spectrum over a narrow bandwidth. This modification manifests itself as a noise power decrease in the detected electronic domain.