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	Distributed optical fibre measurements
	HARTOG, ARTHUR H.
	2007-10-23
著作权人	SCHLUMBERGER TECHNOLOGY CORPORATION
专利号	US7284903
国家	美国
文献子类	授权发明
其他题名	Distributed optical fibre measurements
英文摘要	A method of obtaining a distributed measurement comprises deploying an optical fibre in a measurement region of interest, and launching into it a first optical signal at a first wavelength λ0 and a high power level, a second optical signal at a second wavelength λ−1, and a third optical signal at the first wavelength λ0 and a low power level. These optical signals generate backscattered light at the second wavelength λ−1 arising from Raman scattering of the first optical signal which is indicative of a parameter to be measured, at the first wavelength λ0 arising from Rayleigh scattering of the first optical signal, at the second wavelength λ—1 arising from Rayleigh scattering of the second optical signal, and at the first wavelength λ0 arising from Rayleigh scattering of the third optical signal. The backscattered light is detected to generate four output signals, and a final output signal is derived by normalising the Raman scattering signal to a function derived from the three Rayleigh scattering signals, which removes the effects of wavelength-dependent and nonlinear loss.
公开日期	2007-10-23
申请日期	2005-03-31
状态	授权
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/34499]
专题	半导体激光器专利数据库
作者单位	SCHLUMBERGER TECHNOLOGY CORPORATION
推荐引用方式 GB/T 7714	HARTOG, ARTHUR H.. Distributed optical fibre measurements. US7284903. 2007-10-23.

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