All-optical two-channel polarization-multiplexing format conversion from QPSK to BPSK signals in a silicon waveguide
All-optical two-channel polarization-multiplexing format conversion from QPSK to BPSK signals in a silicon waveguide
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DOI：
10.1364/prj.4.000245
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发表时间：
2016-12
影响因子：
7.6
通讯作者：
Xianglian Feng;Zhihang Wu;Xiaoyan Wang;Sailing He;Shiming Gao
中科院分区：
文献类型：
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作者：
Xianglian Feng;Zhihang Wu;Xiaoyan Wang;Sailing He;Shiming Gao
提出了40Gbit/S偏振复用器非归零正交移相键控信号到二进制相移键控信号的全光双通道格式转换方案，利用硅波导中的四波混频效应，利用两个偏振角度泵浦，实现了两通道格式的全光转换。在这两种极化状态下，每个信道的原始QPSK序列和转换后的BPSK序列的眼图和星座图清晰可见。此外，还测量了两个转换空闲的误码率(BERS)。在误码率为3.8×10−3时，所有这些转换后的序列在X和Y偏振态上的功率损失均小于3.4dB.
All-optical two-channel format conversion is proposed and experimentally demonstrated from a 40 Gbit/s polarization multiplexing (Pol-MUX) non-return-to-zero quadrature phase-shift keying (QPSK) signal to Pol-MUX binary phase-shift keying (BPSK) signals by using phase-doubled four-wave mixing effects with two polarization-angled pumps in a silicon waveguide. The eye diagrams and constellation diagrams of the original QPSK sequences and the converted BPSK sequences of each channel are clearly observed on the two polarization states. Moreover, the bit error rates (BERs) of the two converted idlers are measured. The power penalties of all these converted BPSK sequences on both X and Y polarization states are less than 3.4 dB at a BER of 3.8×10−3.