Hui Li, Yuanhong Yang. Optical fiber hydrogen sensing technology (Invited)[J]. Infrared and Laser Engineering, 2022, 51(1): 20211114
- Infrared and Laser Engineering
- Vol. 51, Issue 1, 20211114 (2022)
Fig. 1. Growth in fiber-optic hydrogen sensor publications since 2000 according to an enquiry (December 2020) in Ei Compendex
![Schematic of strain modulation M-Z interference hydrogen sensor[40]](/richHtml/irla/2022/51/1/20211114/img_2.jpg)
Fig. 2. Schematic of strain modulation M-Z interference hydrogen sensor[40]
![(a) Schematic of strain modulation F-P interference hydrogen sensor[42]; Schematic of F-P interference structure with Pd film (b) on the side[58] and (c) on the end[59]. PHF：Palladium based hydrogen sensitive film](/Images/icon/loading.gif){kind=icon}
Fig. 3. (a) Schematic of strain modulation F-P interference hydrogen sensor[42]; Schematic of F-P interference structure with Pd film (b) on the side[58] and (c) on the end[59]. PHF：Palladium based hydrogen sensitive film
Fig. 4. Schematic probe structure of optical fiber hydrogen sensor based on F-P interferometer formed by microcantilever[39]
Fig. 5. (a) Schematic of strain modulation FBG hydrogen sensor[45]; Schematic of FBG sensing area of (b) side polishing[57], (c) cladding corrosion[60], (d) taper[61], and (e) grooving[62]
Fig. 6. (a) Schematic of modulation optical fiber interferometer hydrogen sensor based on radial strain[41]；(b) Enlarged view of PM-PCF sensor head
Fig. 7. (a) Schematic of typical refractive index modulation micro mirror hydrogen sensor[47]; (b) Schematic of single optical path differential structure[64]; (c) Schematic of dual optical path differential structure[48]
Fig. 8. (a) Schematic of typical refractive index modulation evanescent field hydrogen sensor[49]; (b) Schematic of D-type evanescent field hydrogen sensor[50]
Fig. 9. (a) Schematic of typical refractive index modulation SPR hydrogen sensor; (b) Sketch for Pd metallic grating on the end-face of fiber[69]
Fig. 10. (a) Schematic of typical refractive index modulation M-Z hydrogen sensor[52]; Schematic of M-Z sensing area of (b) Core-offset fusion[70], (c) taper[33], (d) collapse fusion[71], and (e) LPG[73]
Fig. 11. Schematic of temperature modulation FBG hydrogen sensor. THF: Tungsten trioxide hydrogen sensitive material
Fig. 12. Principle of sensing technology based on stimulated Raman dispersion[75]
Fig. 13. Magnetron sputtering coating equipment. (a) Magnetron sputtering coating machine; (b) Three independent target sources; (c) Optical fiber clamp
|
Table 1. Classification of optical fiber hydrogen sensors
Set citation alerts for the article
Please enter your email address
© Copyright 2018-2021 | Chinese Laser Press. All Rights Reserved 沪ICP备15018463号-20