Plasma resonance tilted fiber Bragg grating hydrogen sensor, detection system and method

Abstract

The invention discloses a plasma resonance tilted fiber Bragg grating hydrogen sensor, a plasma resonance tilted fiber Bragg grating hydrogen detection system and a plasma resonance tilted fiber Bragg grating hydrogen method. The system comprises a light source, a polarizer, a polarization controller, a plasma resonance tilted fiber Bragg grating hydrogen sensor, a photoelectric detector, an oscilloscope and a gas storage container; the light source, the polarizer, the polarization controller, the hydrogen sensor, the photoelectric detector and the oscilloscope are sequentially connected with one another; the hydrogen sensor is arranged in the gas storage container when hydrogen is measured; the hydrogen sensor comprises an optical fiber engraved with a tilted fiber Bragg grating; the tilt angle of the tilted fiber Bragg grating is smaller than or equal to 45 degrees; the outer surface of the cladding layer of the optical fiber is plated with a nano-scale palladium film; plasma resonance waves on the surface of the palladium film are excited through the tilted fiber Bragg grating plated with the palladium film, so that specific recognition is carried out on the hydrogen; and the high-precision measurement of the static concentration and dynamic concentration change of the hydrogen is further realized.

Description

technical field [0001] The invention relates to a hydrogen gas measuring instrument, in particular to a plasma resonance inclined optical fiber grating hydrogen gas sensor, a detection system and a method, belonging to the field of gas detection. Background technique [0002] Since entering the 21st century, hydrogen has attracted great attention as a future clean energy, especially due to its recyclable and low-pollution properties. Hydrogen is used extensively in the space environment as a power source for rockets and to fuel life support systems and computers. Hydrogen is also used in the automotive industry where it reacts with oxygen to produce a bright sheen on automotive steel parts. When used as an alternative fuel, it plays a key role in reducing undesirable emissions. [0003] Due to the scale and growth of hydrogen demand, there is a lot of concern about how it can be used safely. Hydrogen is colorless, odorless, highly volatile, flammable, and even explosive: ...

AI Technical Summary

Problems solved by technology

However, in general, such specific functional materials often affect the excitation of plasmon resonance, which limits the application of this technology in hydrogen measurement to a certain extent.

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