摘要
将Nd:YVO4-KTP固体激光器输出的532nm和1064nm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2.2dB,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。
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.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2014年第3期266-270,共5页
Chinese Journal of Lasers
基金
国家自然科学基金(61108003)
山西省青年科技基金(2013021005-2)
量子光学与光量子器件国家实验室开放课题(KF201007)
关键词
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
