解调
光学
相位调制
椭圆
调制(音乐)
干涉测量
信号(编程语言)
相(物质)
强度调制
信号处理
计算机科学
物理
数字信号处理
声学
相位噪声
电信
天文
频道(广播)
量子力学
程序设计语言
计算机硬件
作者
Chang Ni,Ming Zhang,Yu Zhu,Chuxiong Hu,Siqi Ding,Zhe Jia
出处
期刊:Applied optics
[The Optical Society]
日期:2017-05-01
卷期号:56 (13): 3895-3895
被引量:34
摘要
In a sinusoidal phase-modulating interferometer, sinusoidal modulation of the phase of the laser or the reference wave is necessary. However, modulation of the phase also involves an intensity modulation of the light, which leads to a measurement error if conventional signal processing is used. In addition, the error of modulation depth and the phase delay of demodulation also increase the measurement error. A novel signal processing, with ellipse fitting and a correction method, is proposed. Numerical simulation results and experimental results prove that the novel signal processing can compensate for the measurement error caused by the intensity modulation, the error of modulation depth, and the phase delay of demodulation.
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