Ⅱ类光学参量放大器中多横模的共振

Transverse Multimodes Resonance in a Type-Ⅱ Optical Parametric Amplification

研究了一阶厄米-高斯模TEM01模和TEM10模在光学参量放大器中的共振情况。针对非线性KTP晶体各向异性引入像散效应,导致TEM01模和TEM10模不能在光学参量放大器中同时共振,设计了一个对称补偿方案,使其可以在光学参量放大器中同时共振,并进行了实验验证,为超纠缠态的实验产生奠定了基础。

We investigate theoretically and experimentally the oscillation of first-order Hermite-Gauss TEM01 and TEM10 modes in an optical parametric amplification.We present a symmetrical and complemental method to avoid the astigmatism caused by the crystal birefringence,so that TEM01 and TEM10modes can be resonate simultaneously in the optical parametric amplifier,and experimentally demonstrate it,this result is useful for the generation of hyperentanglement.