【摘要】 提出了一种适用于星载量子密钥分发的偏振无关精跟踪反射结构,反射结构利用旋光晶体和两面材质相同的反射镜实现偏振态的自动补偿。仿真结果显示,普通的反射镜对于偏振态的影响极大,从量子误码率上来看,折射率为1.52的单面精跟踪反射镜将引入40%左右的误码率。而旋光-双反射结构最大仅引入了0.25%的量子误码率,特别是在零偏转附近的量子误码率趋近于零。更多还原

【Abstract】 An optical polarization independence reflection structure applies to fine tracking mirror in satellite-based quantum key distribution is proposed.This structure is composed of magneto-optical crystal and two same mirrors.The results of simulation show that single mirror badly influences the polarization state.For the mirror with refractive index of 1.52,the quantum bit error rate caused by mirror is 40%.The quantum bit error rate caused by polarization independence reflection structure is not more than 0.25%,particularly,it is approaching zero when the deflection is approaching zero.更多还原