Optical fiber hot-wire type wind gage based on tilted fiber bragg grating
A fiber-optic Bragg and hot-wire technology, which is applied in the direction of measuring fluid velocity by using thermal variables, can solve the problems of low sensitivity and repeatability, complex structure, etc., and achieve the effect of simple measurement principle, small size and convenient production
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[0013] The present invention will be further described below in conjunction with the accompanying drawings.
[0014] Such as figure 1 , shown in 2, a kind of fiber optic hot wire wind power based on tilted fiber Bragg grating, mainly includes spectrometer 1, broadband light source 2, fiber optic circulator 3, pumping light source 4, wavelength division multiplexer 5, tilted fiber Bragg grating 6, Metal film7. The spectrometer 1 is connected to the optical output end of the optical fiber circulator 3, the incident end of the optical fiber circulator 3 is connected to the broadband light source 1, and at the same time, the reflection end of the optical fiber circulator 3 is connected to the Pass end of the peak multiplexer 5, and the peak multiplexer The Reflect end of 5 is connected to the pump light source, and the Common end of the peak multiplexer is connected to one end of the inclined fiber grating 6 coated with a metal film.
[0015] In order to couple the pump light so...
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