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Proceedings Paper

Strain sensitivity of long period gratings in hollow-core photonic bandgap fibers
Author(s): Long Jin; Wei Jin; Jian Ju
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Paper Abstract

We investigate the strain sensitivity of long period gratings (LPGs) fabricated in hollow-core photonic bandgap fibers (HC-PBFs). The LPGs are fabricated by periodically deforming the air-holes along the PBFs by use of a CO2 laser. Resonant couplings between the LP01 and LP11 core modes results in two highly polarization-dependant loss dips in the transmission spectrum. The sensitivity of the resonant wavelength to strain was found to vary from -1.48 to -2.4 pm/με when the grating pitch was changed from 225 to 175 μm. Theoretical investigation suggests that the size and shape of the core can have significant influence on the strain sensitivity.

Paper Details

Date Published: 19 May 2011
PDF: 4 pages
Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 77539P (19 May 2011); doi: 10.1117/12.885840
Show Author Affiliations
Long Jin, The Hong Kong Polytechnic Univ. (Hong Kong, China)
Jinan Univ. (China)
Wei Jin, The Hong Kong Polytechnic Univ. (Hong Kong, China)
Jian Ju, The Hong Kong Polytechnic Univ. (Hong Kong, China)


Published in SPIE Proceedings Vol. 7753:
21st International Conference on Optical Fiber Sensors

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