Highly sensitive refractometer based on a D-shaped fiber Bragg grating integrated into a loop-mirror optical fiber laser

This proposed sensor is used in wavelength interrogation method, in which the D-shaped FBG is applied as a refractive index (RI) sensing probe and a mirror to select mode of laser. The sensor is run by monitoring the wavelength shift of selected laser mode.
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Highly sensitive refractometer based on a D-shaped fiber Bragg grating integrated into a loop-mirror optical fiber laser