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首页> 外文期刊>Applied optics >Coherent frequency-modulated continuous wave reflectometry for measuring stationary Brillouin grating induced under uniform pumping by counterpropagating nonmodulated light waves
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Coherent frequency-modulated continuous wave reflectometry for measuring stationary Brillouin grating induced under uniform pumping by counterpropagating nonmodulated light waves

机译：相干调频连续波反射法通过反向传播非调制光波来测量均匀泵激下的固定布里渊光栅

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摘要

We describe theoretically and experimentally how valuable information on the distributed Brillouin spectra of an optical waveguide is derived from the stationary Brillouin grating measurement under uniform pumping over the waveguide by using the coherent frequency-modulated continuous wave reflectometry. We upconvert the frequencies of the probe and pumping light waves by the Brillouin frequency with one modulator and detect the Stokes light in the same way that we detect the Fresnel and Rayleigh backreflections in the fiber. The intrinsic coherent spike is reduced by using the lock-in detection and the least squares method to reveal the distributed Brillouin spectra of a short optical fiber consisting of two different fibers spliced together. (C) 2016 Optical Society of America
机译：我们在理论上和实验上描述了如何通过使用相干调频连续波反射法，在均匀泵浦波导的情况下，从固定的布里渊光栅测量结果中，得出关于光波导的分布式布里渊光谱的有价值的信息。我们用一个调制器将布里渊频率和布里渊频率上移探针的频率并泵浦光波，并以与检测光纤中的菲涅耳和瑞利背向反射相同的方式检测斯托克斯光。通过使用锁定检测和最小二乘方法来揭示由两条不同的光纤拼接在一起的短光纤的分布布里渊光谱，可以减少固有相干尖峰。 （C）2016美国眼镜学会

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