Simultaneous measurement of vibration and parameters of a semiconductor laser using self-mixing interferometry
Simultaneous measurement of vibration and parameters of a semiconductor laser using self-mixing interferometry
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DOI：
10.1364/ao.53.004256
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发表时间：
2014-07-01
期刊：
影响因子：
1.9
通讯作者：
Guo, Qinghua
中科院分区：
文献类型：
--
作者：
Gao, Yan;Yu, Yanguang;Guo, Qinghua
基于激光二极管(LD)的自混合干涉术(SMI)是一种很有前途的非接触传感技术。根据众所周知的Lang-Kobayashi方程，SMI波形由多个参数构成，包括线宽增强因子(表示为α)、光反馈电平因子(表示为C)和LD的外腔运动。提出了一种从一段SMI信号中同时提取多个参数的新算法。首先，基于已有的SMI模型，推导出一组线性方程。通过仔细选择数据样本，可以使线性方程独立并用于确定一组变量，从而确定α和C的值，以及外部运动的重建系数。本文的工作解除了基于SMI的传感方法中存在的限制，如已知α和C或外部目标的振动信息。通过仿真和实验验证了该算法的有效性。(C)2014年美国光学学会
Laser diode (LD)-based self-mixing interferometry (SMI) is a promising technique for noncontact sensing and its instrumentation. According to the well-known Lang-Kobayashi equations, an SMI waveform is shaped by multiple parameters, including linewidth enhancement factor (denoted as alpha), optical feedback level factor (denoted as C), and the movement of the external cavity of an LD. This paper presents a new algorithm for simultaneously retrieving the multiple parameters from a piece of SMI signal. First, a set of linear equations is derived based on the existing SMI model. By careful selection of data samples, the linear equations can be made independent and used to determine a set of variables, and thus the values of alpha and C, as well as the reconstruction coefficients of the external movement. The work in this paper lifts the restrictions existing in SMI-based sensing methods, such as prerequisite knowledge of either alpha and C or vibration information of an external target. Simulations and experiments are conducted to verify the proposed algorithm. (C) 2014 Optical Society of America