Optimized design of laser range finding system using the self-mixing effect in a single-mode VCSEL

作     者：王焕钦 赵天鹏 徐军 何德勇 吕亮 桂华侨 黄伟 明海 谢建平 

作者机构：Department of Physics 

出 版 物：《Chinese Optics Letters》 (中国光学快报（英文版）)

年 卷 期：2006年第4卷第2期

页      码：87-90页

摘      要：An optimized design of laser range finding system using the self-mixing effect in a single-mode verticalcavity surface-emitting laser （VCSEL） is proposed. In order to improve the ranging accuracy and expand dynamic measurement range, we apply difference frequency analog phase-locked loop （PLL） instead of fast Fourier transform （FFT） to process signal, and choose the optimum triangular wave frequency .fm= 500 Hz and small modulation current △Ip p = 0.28 mA to modulate single-mode VCSEL. The experiment results show that, without controlling the laser＇s temperature, the ranging accuracy is better than 2 mm and the measurement dynamic range is as large as 50-500 mm when the sampling time is 0.1 s and the room temperature is 0--55℃.

主 题 词：Design Dynamics Laser applications Light emission Modulation Optimization Phase locked loops Signal processing Surface phenomena Temperature 

学科分类：080901[080901] 0809[工学-计算机类] 08[工学] 080401[080401] 0804[工学-材料学] 0803[工学-仪器类] 

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