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Proceedings Paper

Light power sensor by using a photosensitive liquid crystal hybrid film on side polished fiber
Author(s): Jianhui Yu; Haozhi Li; V. K. Hsiao; Weiping Liu; Jieyuan Tang; Yanfang Zhai; Yao Du; Jun Zhang; Yi Xiao; Zhe Chen
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Paper Abstract

A novel light power sensor is demonstrated by using side polished fiber (SPF) overlaid with a photoresponsive liquid crystal hybrid film. The mixture of 15%Azo, 20% ZLI811, and 65% nematic liquid crystal is overlaid on the flat area of SPF to form a mixture film of ~30m thickness. The film is irradiated by light of wavelength of 405nm through a phase mask with a period of ~528nm. An absorption peak in the transmission spectrum of 1520-1620nm of optical fiber is observed. Experiment shows that the wavelength of absorption peak will shift toward shorter wavelength as the irradiation power increases. The change of wavelength of absorption peak is approximately linear to the irradiation power while the irradiation powers are between 30-80mw in our initial experiments. The measured sensitivity of light power is about 1.154pm/uW for the demonstrated sensor.

Paper Details

Date Published: 7 November 2012
PDF: 4 pages
Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 842196 (7 November 2012); doi: 10.1117/12.974912
Show Author Affiliations
Jianhui Yu, Jinan Univ. (China)
Haozhi Li, Jinan Univ. (China)
V. K. Hsiao, National Chi Nan Univ. (Taiwan)
Weiping Liu, Jinan Univ. (China)
Jieyuan Tang, Jinan Univ. (China)
Yanfang Zhai, Jinan Univ. (China)
Yao Du, Jinan Univ. (China)
Jun Zhang, Jinan Univ. (China)
Yi Xiao, Jinan Univ. (China)
Zhe Chen, Jinan Univ. (China)

Published in SPIE Proceedings Vol. 8421:
OFS2012 22nd International Conference on Optical Fiber Sensors
Yanbiao Liao; Wei Jin; David D. Sampson; Ryozo Yamauchi; Youngjoo Chung; Kentaro Nakamura; Yunjiang Rao, Editor(s)

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