使用并行半导体光放大器-马赫曾德尔干涉仪（SOA-MZI）开关键控（OOK）/二进制相移键控（BPSK）转换器实现从非归零开关键控（NRZ-OOK）到归零四相相移键控（RZ-QPSK）的全光调制格式转换。

All-optical modulation format conversion from NRZ-OOK to RZ-QPSK using parallel SOA-MZI OOK/BPSK converters.

作者信息

Mishina Ken, Nissanka Suresh M, Maruta Akihiro, Mitani Shunsuke, Ishida Kazuyuki, Shimizu Katsuhiro, Hatta Tatsuo, Kitayama Ken-Ichi

出版信息

Opt Express. 2007 Jun 11;15(12):7774-85. doi: 10.1364/oe.15.007774.

DOI:10.1364/oe.15.007774

PMID:19547105

Abstract

A novel all-optical modulation format conversion from non-return-to-zero on-off-keying (NRZ-OOK) to return-to-zero quadrature-phase-shift-keying (RZ-QPSK) is proposed and experimentally demonstrated. The proposed format conversion scheme is based on parallel Mach-Zehnder interferometric (MZI) OOK/binary-PSK (BPSK) converters, consisting of integrated semiconductor optical amplifiers (SOAs). We experimentally demonstrate that in both decoded channels of the converted RZ-QPSK signal bit error rate (BER) curves show almost the same receiver sensitivity at a symbol-rate of 10.7 Gsymbol/s. In addition, a reasonable dispersion tolerance of the converted signal up to +295 ps/nm is observed. The numerical simulation based upon carrier rate equation verifies the experimental results.

摘要

提出并通过实验证明了一种新型的全光调制格式转换，即从非归零开关键控（NRZ-OOK）转换为归零四相相移键控（RZ-QPSK）。所提出的格式转换方案基于并行马赫-曾德尔干涉仪（MZI）OOK/二进制相移键控（BPSK）转换器，由集成半导体光放大器（SOA）组成。我们通过实验证明，在转换后的RZ-QPSK信号的两个解码通道中，误码率（BER）曲线在10.7 Gsymbol/s的符号率下显示出几乎相同的接收机灵敏度。此外，观察到转换后的信号具有高达+295 ps/nm的合理色散容限。基于载流子速率方程的数值模拟验证了实验结果。