Numerical simulation of phase modulation method used as high sensitive self-mixing vibrometry in vertical-cavity surface-emitting laser

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• 作者：Jingyu Yang ; Bo Yang ; Wenhua Zhang ; Yunhe Zhao ; Zhengting Du ; Yushan Zeng ; Jianxi Zhou ; Huaqiao Gui ; Liang lu ; Benli Yu
• 关键词：Laser sensors ; Optical measurement ; Vertical-cavity surface-emitting laser (VCSEL) ; Self-mixing ; Phase modulation
• 刊名：Optik - International Journal for Light and Electron Optics
• 出版年：2013
• 出版时间：December, 2013
• 年：2013
• 卷：124
• 期：23
• 页码：6017-6019
• 全文大小：641 K

文摘

The self-mixing interference technique is a compact sensing technique that has widely used for measuring vibrations. For purpose of increasing the accuracy of the vibration measurement system, a new phase modulation technique based on the self-mixing interferometer is presented. The phase modulation is obtained by varying the length of external cavity periodically. The vibration information of the external target is determined by the Fourier analysis method. Theoretical analysis and numerical simulations of phase modulation method used as high sensitive self-mixing vibrometry based on vertical-cavity surface-emitting laser are given in this paper.