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Proceedings Paper

Temperature self-compensation method of hydrogen gas sensor based on a double cladding fiber interferometer
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Paper Abstract

We propose a simple method to self-compensate temperature which can affect the sensitivity of palladium-based hydrogen gas sensor. When a long-period fiber grating is fabricated in a double cladding fiber, the fundamental core mode is coupled to the inner cladding mode as well as the outer cladding mode. Since the inner cladding mode is insensitive to the external contact, it is independent to the thin palladium layer coated out of cladding surface. Thus, the spectrum corresponding to outer cladding modes reflects the reaction between hydrogen and palladium while that of the inner cladding mode indicates the ambient temperature only.

Paper Details

Date Published: 5 October 2009
PDF: 4 pages
Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75032Q (5 October 2009); doi: 10.1117/12.835470
Show Author Affiliations
Myoung Jin Kim, Korea Photonics Technology Institute (Korea, Republic of)
Jung Woon Lim, Korea Photonics Technology Institute (Korea, Republic of)
Youngho Kim, Gwangju Institute of Science and Technology (Korea, Republic of)
Byeong Ha Lee, Gwangju Institute of Science and Technology (Korea, Republic of)
Byung Sup Rho, Korea Photonics Technology Institute (Korea, Republic of)


Published in SPIE Proceedings Vol. 7503:
20th International Conference on Optical Fibre Sensors
Julian D. C. Jones, Editor(s)

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