位相不匹配情形Fokker-Planck方程的解及其在准位相匹配参量放大中的应用  

The solution of phase-mismatched Fokker-Planck equation and its application in the QPM device

作　　者：赵超樱[1] 谭维翰[1] 

机构地区：[1]上海大学物理系,上海200444

出　　处：《物理学报》2005年第6期2723-2730,共8页Acta Physica Sinica

基　　金：上海市教育委员会重点学科基金资助的课题.~~

摘　　要：在前文的基础上求得了简并参量放大系统在位相不匹配情况下的Fokker_Planck方程一个新的解析解,然后通过准位相匹配(QPM),计算振幅的量子起伏.这一结果在不考虑损耗(k=0)情况下,与已知的按解Langevin方程求得的结果为一致.对于一般的考虑损耗(k≠0)情况,我们也得出损耗系数k对压缩态特性的影响.A new analytical solution for the phase-mismatched Fokker-Planck equation of degenerate parametric amplification, and its application in evaluation of the amplitude quantum fluctuation after passing through the quasi-phase-matching(QPM) device is presented. The calculated results for QPM device, agree with that of the Langevin equation in the case of no loss k = 0, and give a general solution for k not equal 0, from which we can derive the influence of squeezing on the loss coefficient k.

关 键 词：简并参量放大 F0kke-Planck方程 准位相匹配 非线性频率转换 量子起伏 

分 类 号：O734[理学—晶体学]