Effect of multiple transverse modes in self-mixing sensors based on vertical-cavity surface-emitting lasers
Effect of multiple transverse modes in self-mixing sensors based on vertical-cavity surface-emitting lasers
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DOI：
10.1364/ao.46.000611
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发表时间：
2007-02
期刊：
影响因子：
1.9
通讯作者：
J. Tucker;A. Rakić;C. J. O'brien;A. Zvyagin
中科院分区：
文献类型：
--
作者：
J. Tucker;A. Rakić;C. J. O'brien;A. Zvyagin
我们研究了共存横向模式对基于垂直腔表面发射激光器（VCSEL）的自混合传感器运行的影响。通过模拟和实验室实验检验了多种横向模式对位移和距离测量的影响。仿真模型表明，自混合信号的形状和幅度随调制电流的周期性变化可以通过VCSEL中各个横向模式的不同调频系数来正确解释。仿真结果与在单模和多模 VCSEL 以及基于这些 VCSEL 的自混合传感器上执行的测量结果非常一致。
We investigate the effect of coexisting transverse modes on the operation of self-mixing sensors based on vertical-cavity surface-emitting lasers (VCSELs). The effect of multiple transverse modes on the measurement of displacement and distance were examined by simulation and in laboratory experiment. The simulation model shows that the periodic change in the shape and magnitude of the self-mixing signal with modulation current can be properly explained by the different frequency-modulation coefficients of the respective transverse modes in VCSELs. The simulation results are in excellent agreement with measurements performed on single-mode and multimode VCSELs and on self-mixing sensors based on these VCSELs.