中国激光, 2014, 41 (3): 0318001, 网络出版: 2014-02-26
高阶TEM01模压缩态Wigner准概率分布函数的量子重构
Quantum Resonstruction of Wigner Quasiprobability Distribution Function of High Order TEM01 Squeezed States
量子光学 压缩态光场 高阶厄密高斯模 光学参量放大器 Wigner准概率分布函数 quantum optics squeezed state field high order Hermite Gauss mode optical parametric amplifier Wigner quasiprobability distribution function
摘要
将Nd:YVO4-KTP固体激光器输出的532 nm和1064 nm激光分别作为抽运光和种子光注入一个内置周期极化磷酸氧钛晶体的简并光学参量放大器,通过非线性光学参量过程产生明亮的高阶横模TEM01正交振幅压缩态光场,利用平衡零拍探测系统测得其压缩度为2.2 dB,利用数字存储示波器记录经信号处理系统变换的数据,再通过自编的软件利用量子层析测量技术得到了该压缩态光场在相空间的Wigner准概率分布函数,并将其与理论结果作了对比,两者基本一致。
Abstract
532 nm and 1064 nm laser outputs of Nd:YVO4-KTP solid laser, as pump beam and seed light, respectively, are injected into a degenerate optical parametric amplifier with a periodically poled KTP crystal. The bright high order transverse mode TEM01 quadrature amplitude squeezed field, which is generated by the nonlinear optical parametric process, is measured to be 2.2 dB squeezing degree with a homodyne detection system. A group of transformed signal data is saved by a digital storage oscilloscope. The Wigner quasiprobability distribution function of the squeezed field in the phase space is reconstructed using quantum tomography technique with the self-made software, and it′s found that there is a good agreement between theoretical and experimental results.
杨荣国, 张静, 翟淑琴, 刘先锋. 高阶TEM01模压缩态Wigner准概率分布函数的量子重构[J]. 中国激光, 2014, 41(3): 0318001. Yang Rongguo, Zhang Jing, Zhai Shuqin, Liu Xianfeng. Quantum Resonstruction of Wigner Quasiprobability Distribution Function of High Order TEM01 Squeezed States[J]. Chinese Journal of Lasers, 2014, 41(3): 0318001.