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	Rapid-response calorimetric gauge using fibre optic interferometer
	JAMES, STEPHEN, BARTON; SRIWICKRAMA, PRITHIVIRAJ, HARASGAMA; JULIAN, DAVID, CLAYTON, JONES; STEPHEN, ROBERT, KIDD; PRANAY, GOPAL, SINHA
	1993-01-13
著作权人	THE SECRETARY OF STATE FOR DEFENCE
专利号	GB2257505A
国家	英国
文献子类	发明申请
其他题名	Rapid-response calorimetric gauge using fibre optic interferometer
英文摘要	A high speed sensor for measuring heat flux directly uses an optical fibre Fabry-Perot interferometer 40 which is mounted with one of its end faces 42 flush with the surface of a specimen eg. a turbine blade, whose heat transfer characteristics are to be investigated. The sensor 40 is illuminated by a laser source 10 via a directional coupler 20 and an addressing fibre 30 of identical optical characteristics to the sensor 40. The addressing fibre 30 and the sensor 40 have low reflectivity coatings on their end faces such that some of the incident light is reflected to an interference detector 50. Here the optical phase change in the sensor reflection is detected when the sensor 40 is exposed to heat flux thereby changing its refractive index. A signal processor (not shown) relates the optical phase change to the mass density, specific heat capacity and thermal sensitivity of the sensor 40 to give a direct reading of the heat flux. A Faraday isolator 15 reduces reflections, and a second detector 60 monitors and regulates laser power output.
公开日期	1993-01-13
申请日期	1991-07-08
状态	失效
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/62431]
专题	半导体激光器专利数据库
作者单位	THE SECRETARY OF STATE FOR DEFENCE
推荐引用方式 GB/T 7714	JAMES, STEPHEN, BARTON,SRIWICKRAMA, PRITHIVIRAJ, HARASGAMA,JULIAN, DAVID, CLAYTON, JONES,et al. Rapid-response calorimetric gauge using fibre optic interferometer. GB2257505A. 1993-01-13.

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