实用化多功能光压缩器

Compact nonclassical light source——“Squeezer”

激光二极管抽运的YAP KTP内腔倍频单频激光器及其抽运的半整块非简并光学参量振荡腔 (NOPO)被固定在一体的殷钢底座上构成了全固化多功能光压缩器———Squeezer.通过控制不同的工作条件 ,在此装置上可以产生多种类型压缩光 :阈值以上产生约 6dB(74%)量子相关孪生光束 ;在阈值以下 ,通过注入信号光参量缩小过程产生2 1dB明亮正交振幅压缩光 ;将参量放大器出射的两个频率简并偏振垂直的孪生光束分开 ,获得振幅反关联位相正关联明亮EPR源 .

We designed and built a compact nonclassical light source and named it 'Squeezer', which can generate a variety of squeezed state light fields in principle. A laser diode pumped intracavity frequency-doubled Nd: YAP/KTP laser and a semi-monolithic nondegenerate optical parametric oscillator ( NOPO) are integrated on an invar steel base closely. Above the oscillation threshold of the NOPO(similar to 3 mW), the twin beams with intensity quantum correlation of 6.0dB were obtained; when a signal of subharmarnic wave, which is out of phase to the pump field, is injected into the NOPO, the bright two-mode quantum amplitude squeezed light of 2.1 dB and the EPR beam with amplitude anticorrelation and phase correlation are produced at the pump power of milliwatt order.