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Method for compensating parasitic reflectances in optical waveguide in measurement device for detecting mechanical parameter, involves comparing modified and non-modified radiations, and compensating reflectances based on comparison result
Method for compensating parasitic reflectances in optical waveguide in measurement device for detecting mechanical parameter, involves comparing modified and non-modified radiations, and compensating reflectances based on comparison result
The method involves coupling optical radiation into an optical waveguide, which comprises an integrated sensor (303) i.e. fiber Bragg grid sensor. The coupled optical radiation is modified by the integrated sensor in a wavelength range and is not modified in another wavelength range. A part of the modified optical radiation and a part of the non-modified optical radiation are decoupled. The decoupled modified optical radiation is compared with decoupled non-modified optical radiation. Parasitic reflectances are compensated based on the comparison result. An independent claim is also included for a device for compensation of parasitic reflectances in an optical waveguide.
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