Method of characterizing fiber bragg gratings using...

Details Method of characterizing fiber bragg gratings using... Method of characterizing fiber bragg gratings using...

G - Physics

02

B

G02B 6/02 (2006.01) G01M 11/00 (2006.01)

Patent

CA 2566321

A method determines a complex reflection impulse response of a fiber Bragg grating. The method includes providing a measured amplitude of a complex reflection spectrum of the fiber Bragg grating. The method further includes providing an estimated phase term of the complex reflection spectrum. The method further includes multiplying the measured amplitude and the estimated phase term to generate an estimated complex reflection spectrum. The method further includes calculating an inverse Fourier transform of the estimated complex reflection spectrum, wherein the inverse Fourier transform is a function of time. The method further includes calculating an estimated complex reflection impulse response by applying at least one constraint to the inverse Fourier transform of the estimated complex reflection spectrum.

Un procédé détermine une réponse à impulsion de réflexion complexe d'un réseau de Bragg sur fibre. Le procédé consiste à fournir une amplitude mesurée d'un spectre de réflexion complexe du réseau de Bragg sur fibre. Le procédé consiste également à fournir un terme de phase estimé et du spectre de réflexion complexe et à multiplier l'amplitude mesurée et le terme de phase estimé afin de générer un spectre de réflexion complexe estimé. Le procédé consiste également à calculer une transformée Fourier inverse du spectre de réflexion complexe estimé, la transformée étant fonction du temps. Le procédé consiste par ailleurs à calculer une réponse à impulsion de réflexion complexe estimée par application d'au moins une contrainte sur la transformée de Fourier inverse du spectre de réflexion complexe estimé.

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