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Fiber taper diameter characterization using forward Brillouin scattering
Optics Letters ( IF 3.6 ) Pub Date : 2018-02-21 , DOI: 10.1364/ol.43.000995
P. F. Jarschel , L. S. Magalhaes , I. Aldaya , O. Florez , P. Dainese

We propose a fast and non-destructive method to characterize the absolute diameter and uniformity of micrometer-scale fiber tapers using a pump and probe forward Brillouin scattering setup. The fundamental torsional-radial acoustic mode supported by the wire is excited using a pulsed pump laser and oscillates at a frequency that is inversely proportional to the taper waist diameter. This standing time-varying torsional-radial wave induces polarization modulation on a probe signal, whose spectrum structure reveals the sample diameter and its non-uniformity. By comparing our results with measurements using scanning-electron microscopy, a relative deviation of 1% or less was demonstrated, and diameter non-uniformity of less than 0.5% could be detected.

中文翻译:

使用正向布里渊散射的纤维锥度直径表征

我们提出了一种快速,无损的方法来表征使用泵和正向布里渊散射设置的微米级光纤锥度的绝对直径和均匀度。导线支持的基本扭转径向声学模式是使用脉冲泵浦激光器激发的,并以与锥形腰部直径成反比的频率振荡。这种固定的时变扭转径向波在探针信号上引起极化调制,该探针的频谱结构揭示了样品直径及其不均匀性。通过将我们的结果与使用扫描电子显微镜的测量结果进行比较,可以证明相对偏差为1%或更小,并且可以检测到直径不均匀度小于0.5%。
更新日期:2018-03-01
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