Parametric Amplification and Wavelength Conversion of Single- and Dual-Polarization DQPSK Signals
Parametric Amplification and Wavelength Conversion of Single- and Dual-Polarization DQPSK Signals
复制标题
单偏振和双偏振 DQPSK 信号的参数放大和波长转换
DOI：
10.1109/jstqe.2011.2155035
复制
发表时间：
2012
影响因子：
4.9
通讯作者：
Colja Schubert
中科院分区：
文献类型：
--
作者：
T. Richter;R. Elschner;Amruta Gandhe;Klaus Petermann;Colja Schubert
我们演示了高达112 Gbit/s的单通道差分正交相移键控（DQPSK）信号的偏振无关参数放大和波长转换的系统实验。利用高非线性光纤中的双泵浦四波混频可实现高达20 dB的ON-OFF增益和转换效率。使用单极化和双极化DQPSK，在偏振依赖（直线）和偏振无关（环路）配置中进行了调查。特别注意的是放大后产生的光信噪比惩罚。我们将其归因于泵浦引起的非线性相位噪声。结果表明，由于瑞利后向散射，这种类型的多余噪声在环路配置中比在直线配置中增加，并且它取决于信号的输入极化。尽管如此，使用高质量的泵源，这种损失可以忽略不计。
We demonstrate system experiments for polarization-independent parametric amplification and wavelength conversion of single-channel differential quadrature phase-shift keying (DQPSK) signals up to 112 Gbit/s. Dual-pump four-wave mixing in a highly nonlinear fiber is utilized to achieve up to 20 dB ON-OFF gain and conversion efficiency. The investigations are done in a polarization-dependent (straight) as well as in a polarization-independent (loop) configuration using single- and dual-polarization DQPSK. Particular attention is paid to the resulting optical signal-to-noise ratio penalties after the amplification. We ascribe this to pump-induced nonlinear phase noise. It is shown that this type of excess noise is increased for the loop configuration in comparison with the straight configuration due to Rayleigh backscattering and that it depends on the input polarization of the signal. Still, the penalty can be made negligible using high-quality pump sources.