In sinusoidal phase modulating laser diode interferometer, the main error source is the variation in output light intensity of light source.
在半导体激光正弦相位调制干涉仪中，光源输出光强的变化是测量误差的主要来源。
The optical parameters of grating and intensity ratio among three beams in interferometer are derived from the view of optimization design.
从优化设计的角度求出了光栅的最佳参数以及干涉仪三束光的最佳光强之比；
Michelson interferometer and direct intensity demodulation method were used in experiments.
实验中利用了迈克尔逊干涉仪结构，采用了直接强度解调的方法。
In addition to alternating phase difference between two aims of interferometer, the intensity of light of the interference fringes will vary in the same frequency, which is called as phase modulation.
当两相干光附加一按固定频率变化的相位差时，其干涉条纹的光强将随之交变，即为相位调制干涉。
To decrease the effect of the intensity modulation of the LD on measurement accuracy, a novel LD-SPM fiber-optic interferometer is presented, and the theory of the interferometer is analyzed.
提出一种新的消除激光二极管正弦相位调制干涉仪中光强调制影响的干涉仪，给出了具体的理论分析。
To decrease the effect of the intensity modulation of the LD on measurement accuracy, a novel LD-SPM fiber-optic interferometer is presented, and the theory of the interferometer is analyzed.
提出一种新的消除激光二极管正弦相位调制干涉仪中光强调制影响的干涉仪，给出了具体的理论分析。
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