THz-Range Optical Frequency Shifter for Dual Polarization WDM Signals Using Frequency Conversion in Fiber
THz-Range Optical Frequency Shifter for Dual Polarization WDM Signals Using Frequency Conversion in Fiber
复制标题
利用光纤变频实现双偏振 WDM 信号的太赫兹范围光学移频器
DOI：
10.1109/jlt.2017.2649566
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发表时间：
2017
影响因子：
4.7
通讯作者：
T. Hoshida
中科院分区：
文献类型：
--
作者：
T. Kato;Shigeki Watanabe;T. Tanimura;T. Richter;R. Elschner;C. Schmidt;C. Schubert;T. Hoshida
提出了一种利用光纤频率变换实现双偏振信号的光频移器。提出的光频移器是通过将输入信号与两束正交偏振的连续波泵浦光通过非线性光纤和偏振器传输来实现的。在该方案中，在非线性光纤中产生原始信号的偏振切换和频移副本，并且随后的偏振器以与波长无关的方式去除原始信号。它允许分数带宽移位，其中移位信号与原始信号重叠。我们利用偏振分集环实现了在不使用光学滤波器的情况下对原始信号进行抑制的太赫兹范围的频率偏移。使用偏振分束器作为环路的分束器和合束器以及用于原始信号抑制。两个双偏振400 Gb/s的超级信道的竞争解决方案，证明了通过应用光学移频器与可接受的带内串扰。数值模拟了任意光频移情况下，泵浦波长的排列以及非线性光纤所需的零色散和色散斜率。
We propose an optical frequency shifter for dual-polarization signals using frequency conversion in fiber. The proposed optical frequency shifter is achieved by transmitting input signal combined with two orthogonally polarized continuous wave pump lights through a nonlinear fiber and a polarizer. In the scheme, a polarization switched and frequency shifted copy of an original signal is generated in the nonlinear fiber and the subsequent polarizer removes the original signal in a wavelength independent fashion. It allows a fractional bandwidth shift, in which the shifted signal is overlapped with the original signal. We achieve THz range frequency shift with original signal suppression without an optical filter by using a polarization diversity loop. A polarization beam splitter is used as a splitter and a combiner of the loop as well as for original signal rejection. A contention resolution of two dual-polarization 400-Gb/s superchannels is demonstrated by applying the optical frequency shifter with acceptable in-band crosstalk. For any-to-any optical frequency shift, wavelength arrangement for pumps and required zero dispersion and dispersion slope of nonlinear fibers are numerically simulated.