Optical Fiber Dispersion Equalization based on Quantum Nonlinear Optical Signal Processing using Optical parametric Amplifiers and Optical Products Summation Operation

该项目的最终目标是试验量子光信号处理，利用光接收节点的光参量放大器产生的强相关信号和空闲光子来平衡光纤色散。我们利用光参量放大器输出信号和空闲光子的和频产生的符合检测可证明性，完成了量子色散均衡的理论验证。该方案可用于具有各种线性色散和非线性相位调制的光纤的光分组传输系统，其中偶阶色散可以补偿。这一理论验证被认为是发表在《光学快报》上的重要贡献。为了实验准备，我们开发了高增益为45dB的光纤参数放大器，并研究了如何改善放大信号与空闲光子之间的量子相关性，其中我们首次提出了一种新的方法来评估双折射非线性光纤中的相位失配。在对PMD分布测量方法的研究基础上，提出了极化OTDR中的非对称瑞利后向散射模型，该模型导致了非线性光纤中的模式转换。我们尝试了全量子色散均衡方案来寻找一个意想不到的非常复杂的PPLN频率调谐调节子系统。

Final target of this project is a trial of Quantum Optical Signal Processing for equalizing optical fiber dispersions using strongly correlated signal and idler photons generated an optical parametric amplifier at an optical receiver node.We completed the theoretical verification of quantum dispersion equalization using coincidence detection provability for sum frequency generation of output signal and idler photons of the optical parametric amplifiers. This scheme can be applied in such an optical packet transmission systems through optical fibers with various linear chromatic dispersions and nonlinear phase modulations, where even-order dispersions can be compensated. This theoretical verification is recognized as an important contribution for publication in Optics Letters.For experimental preparation of the trial, we developed the optical fiber parametric amplifiers with high gain of 45dB and studied for improving quantum correlation between amplified signal and idler photons, where we proposed a novel method to evaluate phase mismatch in birefringent nonlinear fibers, for the first time, reported in 0FC2004. And also, we extended the study on PMD distiribution measurement method to propose asymmetric Rayleigh Backscattering model in polarimetric OTDR, which results in the mode conversion in nonlinear fibers. We tried total quantum dispersion equalization scheme to find an unexpected very sophisticated adjustment subsystem to the frequency tuning in PPLN.