Generation of two types of nonclassical optical states using an optical parametric oscillator with a PPKTP crystal
Generation of two types of nonclassical optical states using an optical parametric oscillator with a PPKTP crystal
复制标题
使用带有 PPKTP 晶体的光学参量振荡器生成两种类型的非经典光学状态
DOI：
10.1063/1.4968801
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发表时间：
2016-11-28
影响因子：
4
通讯作者：
Peng, Kunchi
中科院分区：
文献类型：
--
作者：
Huo, Meiru;Qin, Jiliang;Peng, Kunchi
压缩态和纠缠态作为光的非经典态的重要成员，是实现量子测量和构建量子信息网络的基本资源。实验证明，通过改变抽运光的偏振态，可以从畴反转周期为51.7 μm的周期极化KTiOPO_4晶体的光学参量振荡器（OPO）中产生两种非经典光学态。当用垂直偏振的671 nm激光泵浦OPO时，实现了0型准相位匹配的腔内下变频，输出光束为波长为1342 nm的正交振幅压缩态，其正交分量的起伏小于量子噪声限（QNL）3.17 dB。当抽运激光为水平偏振态时，满足II类准相位匹配条件，输出光束成为光的Einstein-Podolsky-罗森纠缠态。
As important members of nonclassical states of light, squeezed states and entangled states are basic resources for realizing quantum measurements and constructing quantum information networks. We experimentally demonstrate that the two types of nonclassical optical states can be generated from an optical parametric oscillator (OPO) involving a periodically poled KTiOPO4 crystal with a domain-inversion period of 51.7 μm, by changing the polarization of the pump laser. When a vertically polarized 671 nm laser is used to pump the OPO, the intra-cavity frequency-down-conversion with type-0 quasi-phase matching is realized and the output optical beam is a quadrature amplitude squeezed state of light at the wavelength of 1342 nm with the fluctuation of quadrature component of 3.17 dB below the quantum noise limit (QNL). If the pump laser is horizontally polarized, the condition of the type-II quasi-phase matching is satisfied and the output optical beam becomes Einstein-Podolsky-Rosen entangled state of light w...