optical power difference 光功率差 effective optical path length 光通道有效长度; 滤纸式烟度计 ..
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Adopting mutually orthogonal magnetic fields, the power tuning curve is utilized for stabilizing optical frequency, the frequency difference drift of double frequency is lower greatly.
采用正交磁场由功率调谐曲线实现稳频，可使双频频差的漂移量大大降低。
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