Based on the two-parameter measurement of the hydrogen concentration and temperature of the device is tilted fiber grating

The present invention belongs to the technical field sensor, in particular based on two-parameter tilted fiber grating hydrogen concentration and the ambient temperature measuring means. Includes a light source, palladium-silver alloy plated film is tilted fiber grating spectrometer and a single mode fiber. Said light source is connected with tilted fiber grating plating palladium-silver alloy film through a single mode fiber, the other end is connected to a grating spectrometer through a single mode fiber. When the device is in the hydrogen atmosphere, the palladium-silver alloy film will absorb hydrogen gas environment, the evanescent field fiber causes changes. Which surface plasmon wave of the metal surface evanescent wave generated by resonance of free electrons, resulting in resonance peak. Hydrogen concentration can be measured using plasmon resonance interval between the two Bragg peak resonance peak. Tilted fiber Bragg grating resonance peak temperature sensitive. Thus, we can use the tilted fiber grating Bragg resonance plasmon resonance peak and peak dual parameter measurement of the hydrogen concentration and temperature.