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Proceedings Paper

Packaged symmetric/asymmetric corrugated long period fiber gratings for refractive index sensing applications
Author(s): Chih-Yu Huang; Wen-Lin Chan; Shih-Min Chuo; Jer-Haur Chang; Li-Lun Chen; Lon A. Wang
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Paper Abstract

We demonstrate a new method that could make possible the mass production of symmetric and asymmetric corrugated long period fiber gratings (C-LPFG) by utilizing hot embossing and imprint lithography on polycarbonate (PC). The poly-dimethylsiloxane (PDMS) is imprinted on PC to create the periodic revealed region of fiber for hydrofluoric acid (HF) etching. The asymmetric C-LPFGs show some unique optical characteristics of two separate dips due to their asymmetric structures. After the torsion, the second dip would be gone and the first one would begin to shift toward shorter wavelength. It is assumed that the asymmetric C-LPFG behaves similar to the symmetric one with the torsion of a full circle. A C-LPFG was well packaged by fixing itself in the PC and having some open area close to the fiber to receive the liquid under test. The corrugated structures close to the fiber core were covered by the liquid that the packaged refractive index sensor has the sensitivity of 26.7 nm/RIU.

Paper Details

Date Published: 5 October 2009
PDF: 4 pages
Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75031C (5 October 2009); doi: 10.1117/12.835311
Show Author Affiliations
Chih-Yu Huang, National Taiwan Univ. (Taiwan)
Wen-Lin Chan, National Taiwan Univ. (Taiwan)
Shih-Min Chuo, National Taiwan Univ. (Taiwan)
Jer-Haur Chang, National Taiwan Univ. (Taiwan)
Li-Lun Chen, National Taiwan Univ. (Taiwan)
Lon A. Wang, National Taiwan Univ. (Taiwan)

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

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