Fiber Bragg grating cryogenic temperature sensors
Applied Optics, Vol. 35, Issue 25, pp. 5202-5205 (1996)
http://dx.doi.org/10.1364/AO.35.005202
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Abstract
Temperature sensing to as low as 80 K was demonstrated with 1.55-μm fiber Bragg gratings. The gratings were bonded on substrates to increase sensitivity, and a shift of the reflection wavelength was measured. The temperature sensitivity was 0.02 nm/K at 100 K when an aluminum substrate was used and 0.04 nm/K at 100 K when a poly(methyl methacrylate) substrate was used. These values are smaller than those at room temperature because of the nonlinearity of both the thermal expansion and the thermo-optic effect. Extension to the liquid helium temperature is also discussed.
© 1996 Optical Society of America
[Optical Society of America ]
Citation
Sanjay Gupta, Toru Mizunami, Takashi Yamao, and Teruo Shimomura, "Fiber Bragg grating cryogenic temperature sensors," Appl. Opt. 35, 5202-5205 (1996)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-35-25-5202
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