Wavelength measuring system

Details Wavelength measuring system Wavelength measuring system

G - Physics

01

J

G01J 9/00 (2006.01) G01J 9/02 (2006.01)

Patent

CA 2295780

A method for measuring the wavelength of light, particularly short pulses of light, with improved accuracy comprises passing the light down a backscatter medium such as an optical fibre and detecting and measuring the wavelength of the backscattered light which will have a pulse length of potentially far greater length than that of the initial pulse. The use of interferometers in conjunction with a reference light of known wavelength enables very accurate measurements to be made.

L'invention concerne un procédé permettant de mesurer la longueur d'ondes de la lumière, en particulier, de petites impulsions de lumière, avec une meilleure précision. Ce procédé consiste à faire passer la lumière sur un milieu de rétrodiffusion, comme une fibre optique par exemple, et à détecter et mesurer la longueur d'ondes de la lumière rétrodiffusée dont la longueur des impulsions est bien supérieure à celle de l'impulsion initiale. L'utilisation d'interféromètres en association avec une lumière de référence de longueur d'ondes connue permet d'effectuer des mesures d'une grande précision.

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