Raman-enhanced regenerative ultrafast all-optical fiber XPM wavelength converter
Raman-enhanced regenerative ultrafast all-optical fiber XPM wavelength converter
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DOI：
10.1109/jlt.2005.843468
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发表时间：
2005-03
影响因子：
4.7
通讯作者：
Wei Wang;H. Poulsen;L. Rau;H. Chou;John E. Bowers;D. Blumenthal
中科院分区：
文献类型：
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作者：
Wei Wang;H. Poulsen;L. Rau;H. Chou;John E. Bowers;D. Blumenthal
对再生式超快全光交叉相位调制（XPM）波长转换器（WC）的拉曼增益增强进行了定量研究，并在40和80 Gb/s下实现了无误差工作。实验证明，在80 Gb/s的负2 dB的功率损失的转换器的再生性质。当拉曼泵浦功率为600 mW时，使用1 km的高非线性光纤，拉曼增益使80 Gb/s的波长转换效率提高了21 dB。提出了基于光纤有效长度的非线性相移增强的分析理论，并给出了非线性增强和拉曼增益之间的关系，作为泵浦功率和光纤设计参数的函数。测量的参数中使用的分析模型，实验和理论之间的良好拟合显示为两种不同类型的光纤：一个色散位移和一个高度非线性光纤。拉曼增益的超快响应时间使得该技术适用于基于光纤的超快WC。此外，对其他非线性光纤波长转换技术的适用性进行了讨论。
The Raman gain enhancement of a regenerative ultrafast all-optical cross-phase modulation (XPM) wavelength converter (WC) is quantitatively investigated and experimentally demonstrated to operate error free at 40 and 80 Gb/s. The regenerative nature of the converter is shown by experimentally demonstrating a negative 2-dB power penalty at 80 Gb/s. It is also shown that the Raman gain greatly enhances the wavelength conversion efficiency at 80 Gb/s by 21 dB at a Raman pump power of 600 mW using 1 km of highly nonlinear fiber. An analytical theory based on nonlinear phase-shift enhancement of the fiber-effective length is presented and shows the relationship between a nonlinear enhancement and Raman gain as a function of pump power and fiber design parameters. Measured parameters are used in the analytical model, and a good fit between experiment and theory is shown for two different types of fiber: one dispersion-shifted and one highly nonlinear fiber. The ultrafast response time of Raman gain makes this technique applicable to fiber-based ultrafast WCs. In addition, the applicability to other nonlinear fiber wavelength conversion techniques is discussed.