相干光通信中预均衡技术的激光器线宽容忍度

发布时间：2018-02-14 13:35

本文关键词： 光通信激光器线宽相干检测预均衡技术数字信号处理　出处：《激光与光电子学进展》2017年03期 　论文类型：期刊论文

【摘要】：介绍了一种基于参考的预均衡(RPE)技术,该技术基于自相干混频技术,可实现自相干零差检测系统中传递函数精确定性信息的测量,并且可对传输信号进行预加重处理。RPE技术可以对所有电和光的线性损失进行预补偿,电和光的线性损失包括调制器和功率放大器引起的带宽限制,以及光学前置滤波器造成的高频分量损失。RPE校准性能很大程度上取决于发射机与接收机的激光器线宽。研究了自相干零差检测系统中几种常见激光源的RPE校准性能,提出了一种能够获得传递函数精确定性信息的相位纠正算法。利用几种典型激光源,在波分复用带宽限制为25GHz、速率为32Gbit/s的偏振复用正交相移键控相干光通信系统中证实了该算法的可行性。
[Abstract]:In this paper, a reference based preequalization (RPE) technique is introduced. The technique is based on the self-coherent mixing technique, which can measure the precise deterministic information of the transfer function in the self-coherent homodyne detection system. And the transmission signal can be preemphasis processing. RPE technology can pre-compensate all the linear loss of electric and optical, including modulator and power amplifier caused by the bandwidth limit, And the high frequency component loss caused by optical prefilter. The calibration performance of RPE depends to a great extent on the linewidth of the transmitter and receiver. The RPE calibration performance of several common laser sources in the self-coherent homodyne detection system is studied. In this paper, a phase correction algorithm is proposed, which can obtain precise information of transfer function. The feasibility of the proposed algorithm is verified in a polarization multiplexing orthogonal phase-shift keying coherent optical communication system with a bandwidth limit of 25 GHz and a rate of 32 Gbit / s.
【作者单位】：华侨大学信息科学与工程学院;
【基金】：国家自然科学基金(61401166)
【分类号】：TN929.1;TN248

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