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首页> 外文期刊>Journal of Lightwave Technology >Performance analysis of wavelength converters based on cross-gain modulation in semiconductor-optical amplifiers
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Performance analysis of wavelength converters based on cross-gain modulation in semiconductor-optical amplifiers

机译：半导体光放大器中基于交叉增益调制的波长转换器的性能分析

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摘要

An analytical theory describing all-optical wavelength converters based on cross-gain modulation (XGM) in semiconductor-optical amplifiers is derived. Our theory consists of two parts: a large-signal analysis yielding the transmission function for the signal, and a small-signal analysis in order to describe the transformation of the signal and probe intensity noise. Both the large-signal as well as the small-signal theory reveal similar performance for the co- and the counterpropagating injection scheme for bit rates up to 2.5 Gb/s. This is confirmed by computer simulations. Consequently, the counterpropagating configuration is preferable because the implementation is simpler and conversion to the same wavelength is possible. In order to increase the conversion efficiency it is better to reduce the average signal power than to increase the probe power, which additionally reduces the output power range. However, there is a tradeoff between conversion efficiency and output extinction ratio. According to the small-signal analysis, the relative-intensity noise (RIN) due to the probe and due to the amplified spontaneous emission is negligible. Moreover, the converted signal has a lower RIN than the input signal.
机译：推导了一种分析理论，该理论描述了半导体光放大器中基于交叉增益调制（XGM）的全光波长转换器。我们的理论包括两部分：大信号分析产生信号的传输函数，小信号分析以描述信号的转换和探头强度噪声。无论是大信号理论还是小信号理论，对于高达2.5 Gb / s的比特率，同向和反向传播注入方案都表现出相似的性能。这通过计算机仿真得到了证实。因此，反向传播的配置是优选的，因为实现更简单并且可以转换为相同的波长。为了提高转换效率，最好是降低平均信号功率，而不是提高探头功率，因为​​后者还减小了输出功率范围。但是，在转换效率和输出消光比之间需要权衡。根据小信号分析，由于探针和放大的自发发射引起的相对强度噪声（RIN）可以忽略不计。而且，转换后的信号具有比输入信号低的RIN。

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