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Proceedings Paper

SFDM/CWDM of hollow-core photonic crystal fiber based etalon strain sensors with long cavity lengths
Author(s): Y. J. Rao; D. W. Duan; T. Zhu; Y. N. Fan
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Paper Abstract

Spatial-frequency division multiplexing (SFDM)/coarse-wavelength division multiplexing (CWDM) of in-line fiber-optic etalon (ILFE) strain sensors, formed by a section of hollow-core photonic crystal fiber (HCPCF), is reported in this paper, for the first time to the best of our knowledge. Due to the low thermal expansion coefficient of HCPCF, such a strain sensor is much less sensitive to temperature change compared with conventional ILFE sensors. In the meanwhile, as the transmission loss of HCPCF is very low, the cavity length of the HCPCF sensor can be much longer than existing ILFEs, making it ideal for use in SFDM and offering great potential to realize multiplexing of a very large number of ILFE sensors. A SFDM/CWDM system with four HCPCF-based ILFE strain sensors is demonstrated and the experimental results show that a strain accuracy of ±5 can be achieved.

Paper Details

Date Published: 12 January 2009
PDF: 5 pages
Proc. SPIE 7133, Fifth International Symposium on Instrumentation Science and Technology, 71331R (12 January 2009); doi: 10.1117/12.821230
Show Author Affiliations
Y. J. Rao, Chongqing Univ. (China)
Univ. of Electronic Science and Technology of China (China)
D. W. Duan, Chongqing Univ. (China)
T. Zhu, Chongqing Univ. (China)
Univ. of Electronic Science and Technology of China (China)
Y. N. Fan, Chongqing Univ. (China)


Published in SPIE Proceedings Vol. 7133:
Fifth International Symposium on Instrumentation Science and Technology
Jiubin Tan; Xianfang Wen, Editor(s)

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