Optimal design for the quasi-phase- matching three-wave mixing.
Optimal design for the quasi-phase- matching three-wave mixing.
复制标题
准相位匹配三波混频的优化设计
DOI：
10.1364/oe.9.000631
复制
发表时间：
2001
期刊：
影响因子：
3.8
通讯作者：
Y. Li
中科院分区：
文献类型：
--
作者：
X. Liu;H. Zhang;Y. Li
本文首次得到了具有任意光栅结构和相移的准相位匹配三波混频（TWM）在小信号近似下的表达式。该表达式可广泛应用于TWM的全光信号处理，其中对DFM中波长转换的信号和泵浦带宽以及SFM中的全光门（AOG）带宽都进行了优化。并与QPM-TWM耦合模方程的结果进行了比较。与无损耗相比，波导中的传播损耗会降低转换效率，但对带宽的影响很小。
Expressions for the quasi-phase-matching (QPM) three-wave mixing (TWM) with arbitrary grating structure and phase shift are obtained in this paper, for the first time, under the small-signal approximation. The expressions can be extensively applied to the all-optical signal processing for TWM, in which the signal and pump bandwidth of the wavelength conversion in DFM and the all-optical gate (AOG) bandwidth in SFM are all optimized. The optimal results from our expressions are compared with the results from the coupled-mode equations of QPM-TWM. Compared with loss free, the propagation loss in waveguides can decrease the conversion efficiency, but only a little change for the bandwidth.