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采用菲涅耳棱体隔离器（ＦＲＯＩ）作为铷玻璃激光双程放大器级间的耦合，本文报导了对双程放大ＦＲＯＩ的隔离比及其随光束口径的变化情况，并分析了调整精度对隔离比的影响。
Fresnel prism isolator (FROI) is used as the coupling between the two stages of the rubidic glass laser two-way amplifier. This paper reports the isolation ratio of the two-way FROI and its variation with the beam diameter, and analyzes the effect of the adjustment accuracy on the isolation Than the impact.