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用双45°LiNbO_3晶体做电光开关的激光器现在用得很普遍。为了获得较窄的单脉冲,常采用脉冲加压式线偏光输出的YAG激光器。在调试这种器件时,利用He—Ne激光束是方便的。但是,由于色差,6328A与1.06μ的光路在LN晶体前后不一致。从图1可见,当O光沿y轴入射,而晶体x方向加半波电压,则光到第二个45°斜面时变为e光,反射时遵守非均匀介质的反射定律:
Lasers made with double 45 ° LiNbO_3 crystals are now very popular. In order to obtain a narrow single pulse, pulse-fed linearly polarized YAG lasers are often used. It is convenient to use a He-Ne laser beam when debugging this device. However, due to the color difference, 6328A and 1.06μ optical path inconsistencies in the LN crystal. As can be seen from Fig. 1, when O light is incident along the y-axis and the X-direction of the crystal is half-wave voltage, the light becomes e-light when reaching the second 45 ° bevel and the law of reflection of the inhomogeneous medium is obeyed when reflected: