采用带有1:2耦合器的非线性光学环镜将调制格式从非归零开关键控（NRZ-OOK）转换为归零16正交幅度调制（RZ-16QAM）的全光技术。

All-optical technique for modulation format conversion from NRZ-OOK to RZ-16QAM employing nonlinear optical loop mirror with 1:2 coupler.

作者信息

Huang Guoxiu, Miyoshi Yuji, Maruta Akihiro, Kitayama Ken-ichi

机构信息

Graduate School of Engineering, Osaka University, Suita, Osaka, Japan.

出版信息

Opt Express. 2012 Nov 19;20(24):27311-21. doi: 10.1364/OE.20.027311.

DOI:10.1364/OE.20.027311

PMID:23187586

Abstract

All-optical technique for modulation format conversion from 4 channels non-return-to-zero on-off-keying (OOK) to return-to-zero 16 quadrature amplitude modulation (16QAM) employing nonlinear optical loop mirror with 1:2 coupler configuration is proposed and experimentally demonstrated at 10Gs/s. The experimentally converted 16QAM signal was distorted in its phase by cross-phase modulation induced amplitude-to-phase noise conversion. The effect of amplified spontaneous emission noise in the amplified OOK signals to the converted 16QAM's phase was theoretically discussed.

摘要

提出了一种全光技术，用于将4通道非归零开关键控（OOK）调制格式转换为归零16正交幅度调制（16QAM），该技术采用具有1:2耦合器配置的非线性光学环镜，并在10Gs/s的速率下进行了实验验证。实验转换得到的16QAM信号因交叉相位调制引起的幅度到相位的噪声转换而在相位上发生失真。从理论上讨论了放大的OOK信号中的放大自发辐射噪声对转换后的16QAM信号相位的影响。