具有非均衡输入的频率非简并相位灵敏放大器的噪声性能。

Noise performance of a frequency nondegenerate phase-sensitive amplifier with unequalized inputs.

机构信息

Department of Microtechnology and Nanoscience, Chalmers University of Technology, Göteborg, Sweden.

出版信息

Opt Lett. 2011 Mar 1;36(5):722-4. doi: 10.1364/OL.36.000722.

DOI:10.1364/OL.36.000722

Abstract

For the first time to our knowledge, the noise performance of a frequency nondegenerate phase-sensitive amplifier (PSA) with unequalized input powers has been experimentally characterized, based on a fiber-based parametric copier-PSA scheme. Two different noise-figure (NF) definitions-separate and combined NFs-are provided and compared. The results show that the separate NF of the weaker input wave is lower than that of the stronger wave due to the correlated-light nature. When considering the combined NF, the optimal noise performance (0 dB NF) is obtained only when the input powers are equal. Experiments agree well with the theoretical predictions.

摘要

据我们所知，首次基于基于光纤参量拷贝-PSA 方案，实验性地研究了输入功率不等的非简并相位敏感放大器（PSA）的噪声性能。提供并比较了两种不同的噪声系数（NF）定义-单独和组合 NF。结果表明，由于相干光的性质，较弱输入波的单独 NF 低于较强波的 NF。当考虑组合 NF 时，只有当输入功率相等时，才能获得最佳的噪声性能（0 dB NF）。实验结果与理论预测吻合较好。