Theory and Experiment Study on Laser Self-Mixing Interference with Multiway Feedback External Cavity

Theory and Experiment Study on Laser Self-Mixing Interference with Multiway Feedback External Cavity
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多路反馈外腔激光自混合干涉理论与实验研究

DOI:
10.4028/www.scientific.net/amm.870.47
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发表时间:
2017-09
期刊:
KEM
影响因子:
--
通讯作者:
卢松
卢松
中科院分区:
其他
文献类型:
--
作者:
宦海;徐冬冬;黄凌霄;卢松

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本文分析了多路反馈的自混合干扰(SMI)效应。多路反馈外腔(MFEC)SMI的基本理论可以来源于干涉理论以及激光自混合干涉(LSMI)理论。基于MFEC的外腔结构,提出了具有两个反馈外腔结构的SMI模型。推导了MFEC中相位和输出功率的表达式并进行了仿真分析。结果发现,具有两个外腔的SMI系统的输出信号为正弦波或锯齿波,这与具有低频正弦相位调制的SMI信号相似。一个周期内干扰信号条纹的密度不均匀,干扰波的形状由外部反馈的强度决定。此外,还考虑了具有两个反馈外腔的SMI实验系统,并通过实验验证了仿真结果。
The self-mixing interference (SMI) effect with multiway feedback is analyzed in this paper. The basic theory of SMI with multiway feedback external cavity (MFEC) can be derived from the theory of interference as well as the theory of laser self-mixing interference (LSMI). Based on the external cavity structure with MFEC, a SMI model with two feedback external cavity structure is proposed. The expressions of the phase and output power in the MFEC are deduced and some simulation analyses are made. It is found that the output signal of the SMI system with two external cavity is sinusoidal or sawtooth waves, which is similar to the signal of SMI with a low frequency sinusoidal phase modulation. The density of interference signal fringes is uneven in one period and the shape of the interference wave is determined by the intensity of the external feedback. Furthermore, a SMI with two feedback external cavity experiment system is considered, and the experiment verifies the simulations.
DOI: --
发表时间: 2004
期刊: Chinese Journal of Lasers
影响因子: --
作者:
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