喇曼和布里渊非线性耦合器中光的统计特性
Statistics of light in Raman and Brillouin nonlinear couplers
摘要：
在相干场和量子噪声的广义叠加框架下，研究了由两个波导组成的非线性耦合器中光场的统计特性，其中两个波导中存在拉曼或布里渊过程（经典泵浦），并且通过斯托克斯和/或反斯托克斯线性相互作用相互连接。描述耦合器的海森堡方程在特殊条件下解析求解，在一般情况下数值求解。讨论了单场和复合场的非经典性质，如光子数亚泊松统计、积分强度的负约化矩和正交涨落的压缩。一般的结果进行了比较，从短长度近似。
英文摘要：
Statistical properties of optical fields in nonlinear couplers composed of two waveguides in which Raman or Brillouin processes (with classical pumping) are in operation and which are mutually connected through the Stokes and/or anti-Stokes linear interactions are investigated within the framework of generalized superposition of coherent fields and quantum noise. Heisenberg equations describing the couplers are solved both analytically under special conditions and numerically in general cases. Regimes for nonclassical properties of optical fields, such as sub-Poissonian photon-number statistics, negative reduced moments of integrated intensity and squeezing of quadrature fluctuations are discussed for the cases of single and compound fields. General results are compared with those from short-length approximation.
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