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

Myoung Jin Kim; Jung Woon Lim; Youngho Kim; Byeong Ha Lee; Byung Sup Rho

doi:10.1117/12.835470

5 October 2009 Temperature self-compensation method of hydrogen gas sensor based on a double cladding fiber interferometer

Myoung Jin Kim, Jung Woon Lim, Youngho Kim, Byeong Ha Lee, Byung Sup Rho

Author Affiliations +

Proceedings Volume 7503, 20th International Conference on Optical Fibre Sensors; 75032Q (2009) https://doi.org/10.1117/12.835470
Event: 20th International Conference on Optical Fibre Sensors, 2009, Edinburgh, United Kingdom

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.

Citation Download Citation

Myoung Jin Kim, Jung Woon Lim, Youngho Kim, Byeong Ha Lee, and Byung Sup Rho "Temperature self-compensation method of hydrogen gas sensor based on a double cladding fiber interferometer", Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75032Q (5 October 2009); https://doi.org/10.1117/12.835470

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