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Proceedings Paper

Refractive index sensitivity enhancement of 81° tilted Bragg gratings by cladding etching
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Paper Abstract

The properties of etched large angle tilted gratings (81o) are investigated. The attenuation peaks of the modes are found to shift to shorter wavelengths at a rate of ~5nm/min in a solution of 10% HF acid. The most sensitive modes are examined for different etching times creating the relationship that longer etching times results in an increase in overall sensitivity. Comparing the sensitivity of the tilted fibre grating, etched for 6 hours, 506.9nm/unri and the most sensitive LPG, period 164μm, 389.2nm/unri in the RI range 1.30-1.40 shows that the produced tilted grating is more sensitive than the LPG and in this range would ideally be suited for the used in Bio-sensing applications.

Paper Details

Date Published: 5 October 2009
PDF: 4 pages
Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75036X (5 October 2009); doi: 10.1117/12.834906
Show Author Affiliations
Edward Davies, Aston Univ. (United Kingdom)
Pouneh Saffari, Aston Univ. (United Kingdom)
Chengbo Mou, Aston Univ. (United Kingdom)
Kaiming Zou, Aston Univ. (United Kingdom)
Lin Zhang, Aston Univ. (United Kingdom)


Published in SPIE Proceedings Vol. 7503:
20th International Conference on Optical Fibre Sensors

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