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首页> 外文会议>Conference on Lightguides and their Applications II; 20031009-20031011; Krasnobrod; PL >Optimal contrast function in the unbalanced fiber optic Michelson interferometer for dislocation sensor
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Optimal contrast function in the unbalanced fiber optic Michelson interferometer for dislocation sensor

机译：不平衡光纤迈克尔逊干涉仪中用于位移传感器的最佳对比度功能

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摘要

Theoretical description of a contrast in an unbalanced fiber optic Michelson's interferometer with a multimode laser was shown. Periodic contrast oscillations, which depend on a laser spectrum, occur if a measuring arm of the interferometer is elongated. Required characteristic features of the contrast for an elongation sensor were determined. Influences of laser spectrum parameters (wavelength, halfwidth and mode spacing) as well as laser mode amplitudes on the contrast were simulated. Optimal spectrum for the dislocation sensor was determined theoretically. A laser which parameters fulfilled the requirements was found and its spectrum was measured. The measured contrast function was very similar to the optimal theoretical plot what proves correctness of the calculations.
机译：给出了不平衡光纤迈克尔逊干涉仪与多模激光器中对比度的理论描述。如果干涉仪的测量臂拉长，则会发生取决于激光光谱的周期性对比振荡。确定了伸长率传感器所需的对比度特征。模拟了激光光谱参数（波长，半宽度和模式间隔）以及激光模式振幅对对比度的影响。理论上确定了位错传感器的最佳光谱。找到了满足要求的参数的激光器，并测量了其光谱。测得的对比度函数与最佳理论图非常相似，这证明了计算的正确性。

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