Spatial resolution enhancement in fiber Raman distributed temperature sensor by employing ForWaRD deconvolution algorithm

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• 作者：A.R. Bahrampour^a ; ^{Bahrampour@sharif.edu} ; A. Moosavi^b ; ^{ayoobmoosavi@yahoo.com} ; M.J. Bahrampour^c ; ^{Mj_bahrampour@yahoo.com} ; L. Safaei^d ; ^{Lida_safaei@yahoo.com}
• 关键词：ForWaRD ; Fiber Raman ; Temperature sensor ; Resolution enhancement
• 刊名：Optical Fiber Technology
• 出版年：2011
• 出版时间：March 2011
• 年：2011
• 卷：17
• 期：2
• 页码：128-134
• 全文大小：834 K

文摘

Governing equations of a Raman fiber distributed temperature sensor supported by a counter propagating pumped Raman amplifier are written in the form of integral equations. Forward pump and backward going probe are in the pulsed and continuous wave modes of operation respectively. It is shown that powers of the forward and backward Raman signals (stokes and anti stokes) approximately are the convolution of the input forward pump pulse and corresponding optical fiber impulse responses.

The Fourier Wavelet Regularized Deconvolution (ForWaRD) method is employed to improve the spatial resolution in fiber Raman distributed temperature sensor without reducing the pulse width of the laser source.