Abstract
The hydrogen sensor probe is prepared by combining Pt-loaded WO3 coating with optimized synthesized process and enhanced temperature sensitivity fiber Bragg grating.In this way,the performance of the hydrogen sensor can be significantly improved.The experimental results show that Pt-loaded WO3 coating annealed under 315℃for an hour has better sensitivity toward hydrogen when Pt∶W ratio is controlled at 1∶5.The temperature sensitivity of fiber Bragg grating which is enhanced by exerting axial prestress is 16.3pm/℃,which is nearly twice of common fiber Bragg grating.When hydrogen concentration are 10 000ppm,2 000ppm and 400ppm,the wavelength shifts of fiber Bragg grating are 720 pm,115 pm and 20 pm respectively,and fiber Bragg grating can reach its maxium wavelength shift within one minute.Moreover,the wavelength shift equal to 7.2pm,5.7pm,5pm per 0.01% of H2 concentration and the therhold of hydrogen sensor can reach to 0.04%.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
