Procedure for measuring the wavelength of light reflected by one or more Bragg diffraction gratings in the core of a fibre optic and its application to the measurement of deformation and/or temperature

Procedure for measuring the wavelength of light reflected by one or more Bragg diffraction gratings in the core of a fibre optic and its application to the measurement of deformation and/or temperature, which consists of a non-monochromatic light source (10), an optical coupler (12), a filter (1) depending on the wavelength and a photo-detector (2), the filter being able, depending on the wavelength, to be a long period (20') Bragg grating or a tunable Fabry-P'rot filter (1'), passing the reflected wavelength through the filter so that the intensity received by the photo-detector (2) depends on the wavelength and it is thus possible to determine this as a function of the intensity. (Machine-translation by Google Translate, not legally binding) Procedimiento para la medida de la longitud de onda luminosa reflejada por una o varias redes de difracción de Bragg en el núcleo de una fibra óptica y su aplicación a la medida de deformación y/o temperatura, que consiste en una fuente de luz no monocromática (10), un acoplador óptico (12), un filtro (1) dependiente de la longitud de onda, y un fotodetector (2), pudiendo ser el filtro dependiente de la longitud de onda una red de Bragg de largo período (20'') o un filtro Fabry-Pérot sintonizable (1''), pasando la longitud de onda reflejada a través del filtro, de forma tal que la intensidad que recibe el fotodectector (2) depende de la longitud de onda, y así se puede determinar esta función de la intensidad. **FIGURA** Procedure for measuring the wavelength of light reflected by one or more Bragg diffraction gratings in the core of a fibre optic and its application to the measurement of deformation and/or temperature, which consists of a non-monochromatic light source (10), an optical coupler (12), a filter (1) depending on the wavelength and a photo-detector (2), the filter being able, depending on the wavelength, to be a long period (20') Bragg grating or a tunable Fabry-P'rot filter (1'), passing the reflected wavelength through the filter so that the intensity received by the photo-detector (2) depends on the wavelength and it is thus possible to determine this as a function of the intensity.