中文摘要：

利用自制的1.34μm和0.67μm双波长输出单频激光器作为泵浦源,泵浦基于PPKTP晶体的光学参量放大器,通过边带锁频技术将光学参量放大腔腔长锁定在激光频率上,将泵浦光和信号光相对相位锁定在π相位,经参量缩小过程获得低于散粒噪声极限约3dB的正交振幅压缩光。压缩光位于光纤通信窗口——1.3μm波段。

英文摘要：

We present a generation system of CW bright squeezed-light at telecommunication wavelength of 1.3μ, in which a single-frequency Nd. YVO4 laser with dual wavelength outputs （including 1. 34 tzm and 0.67μm） is used for the pump source of an optical parametric amplifier （OPA） based on PPKTP crystal. The OPA cavity length is loclced via PDH technique. The relative phase between the pump and signal beams is 180-degree. Through a subthreshold parametric frequency down-conversion process in the OPA, the bright squeezed light of 3 dB±0. 1 dB below the shot noise limit （SNL） at 1342 nm is experimental measured, which is located at the fiber winders.