Title :
Fiber optical cavity monitoring of hydrogen diffusion
Author :
Vogler, Daniel E. ; Sigrist, Markas W.
Author_Institution :
Laser Spectrosc. & Sensing Lab., Eidgenossische Tech. Hochschule, Zurich, Switzerland
Abstract :
In this paper, fiber-optic cavity sensor based on cavity ringdown spectroscopy for monitoring hydrogen diffusion has been introduced. An external cavity diode laser (ECDL) has been used as tunable laser source (1520-1600 nm). The temporal evolution of the hydrogen diffusion out of the silica-based fiber cavity has been studied by measuring the ringdown times at different wavelengths every 24 h. The ringdown times are compared with a theoretical diffusion model. It has good agreement with the experimental results.
Keywords :
diffusion; fibre optic sensors; gas sensors; hydrogen; infrared spectroscopy; laser cavity resonators; laser tuning; measurement by laser beam; semiconductor lasers; silicon compounds; 1520 to 1600 nm; 24 h; H2; cavity ringdown spectroscopy; diffusion model; fiber optical cavity sensor; hydrogen diffusion monitoring; silica-based fiber cavity; tunable external cavity diode laser; Diode lasers; Fiber lasers; Hydrogen; Laser modes; Monitoring; Optical fiber sensors; Optical fibers; Optical sensors; Spectroscopy; Tunable circuits and devices;
Conference_Titel :
Lasers and Electro-Optics Europe, 2003. CLEO/Europe. 2003 Conference on
Print_ISBN :
0-7803-7734-6
DOI :
10.1109/CLEOE.2003.1313550
