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

fYear

2003

fDate

22-27 June 2003

Firstpage

487

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Lasers and Electro-Optics Europe, 2003. CLEO/Europe. 2003 Conference on

Print_ISBN

0-7803-7734-6

Type

conf

DOI

10.1109/CLEOE.2003.1313550

Filename

1313550