对飞秒脉冲同步泵浦光学参量振荡器中输出场模式空间旋转的分析  

Analysis of Mode Space Rotation of Output Field in Femtosecond Pulse Synchronuously Pumped Optical Parametric Oscillator

作　　者：赵昱博学 刘宏波 解雁翔 郜江瑞[1] ZHAO Yu-bo-xue;LIU Hong-bo;XIE Yan-xiang;GAO Jiang-rui(State Key of Laboratory of Quantum Optics and Quantum Optics Devices,Institute of Opto-electronics,Shanxi University,Taiyuan 030006,China)

机构地区：[1]山西大学光电研究所量子光学与光量子器件国家重点实验室,山西太原030006

出　　处：《量子光学学报》2022年第4期320-325,共6页Journal of Quantum Optics

基　　金：国家重点研发计划(2021YFC2201802)。

摘　　要：基于飞秒脉冲同步泵浦光学参量振荡器(SPOPO)产生的时域多模非经典光场与空间的厄米高斯多模相结合,可以产生具有时空多模特性的非经典光场,将有望进一步扩展量子信道容量并且进行量子测量。为了实现SPOPO中多横模共振所搭建的非平面环形腔,其在补偿了像散的同时引入了光束的图像旋转。本文就这一问题,采用了高斯光束反射坐标系的构建方法,分析了非平面环形腔中坐标旋转的成因。并且进一步使用多光束干涉的方法理论上计算了当光束在谐振腔内一圈旋转3.26°的情况下总旋转角为25.641°。通过实验模拟验证了理论计算的正确性,并分析了在不同的坐标旋转角以及在不同透射率透射镜的情况下腔镜输出模式的旋转角度,得出了输出模式旋转角度与二者的关系,为进一步优化SPOPO系统和研究非平面腔SPOPO中的多模纠缠关系提供了依据。Based on the femtosecond pulse synchronously pumped optical parametric oscillator(SPOPO),we can generate the time-domain multi-mode nonclassical light field.and combine it with the space Hermite-Gaussian multi-mode,we can develop the spatio-temporal multi-model nonclassical light field,which is expected to further expand the quantum channel capacity and carry out the quantum measurement.We proposed an experimental scheme for compensation of astigmatism,realizing simultaneous resonance of HG01 and HG10 mode in the SPOPO.However,in the experiment it is found that the non-plane cavity will cause the image rotation of the output beam,thus bringing uncertainty to the experimental system.In this paper,we use the method of constructing the novel coordinate system of Gaussian beam to analyze the cause of coordinate rotation in a nonplane annular cavity.Furthermore,the multi-beam interference method is used to calculate the total rotation Angle of 25.641° when the beam rotates 3.26,in the resonant cavity.The correctness of the theoretical calculation is verified by experimental simulation,then we analyze the rotation angles of the output mode of the cavity mirror under different coordinate rotation angles and different transmittance lenses.At last,we obtain the relationship between the rotation angles of the output mode and the two obtained.It provides a basis for further optimization of SPOPO system and research of multi-mode entanglement in Non-plane SPOPO.

关 键 词：量子信息 同步泵浦光学参量振荡器 像散 坐标旋转 

分 类 号：O413[理学—理论物理] TN753.91[理学—物理]