A novel method for chromatic-dispersion monitoring
- 作者：Lijun Li ; legion.li76@gmail.com ; Ge Fan
- 关键词：Chromatic-dispersion monitoring ; Phase modulator ; Phase-modulation to amplitude-modulation conversion ; Nonlinear element
- 刊名：Optics Communications
- 出版年：2012
- 期刊代码：50_00304018
- 类别：ph
- 出版时间：15 June, 2012
- 卷：285
- 期：13-14
- 页码：3050-3053
- 文件大小：531 K
摘要
A novel method for chromatic-dispersion monitoring based on PM-AM conversion is presented. A nonlinear element (NLE) was used as phase-modulator to improve the monitoring performance. The method was investigated numerically and experimentally for 40-Gbit/s signals in NRZ/RZ and CSRZ formats. The monitoring range was enlarged to 1670 ps/nm, and the monitoring sensitivity was improved to 0.012 dB/(ps/nm) for the NRZ signal. The corresponding values for the RZ50 signal were 680 ps/nm and 0.0046 dB/(ps/nm), respectively, and, for the CSRZ signal, 620 ps/nm and 0.0092 dB/(ps/nm), respectively.