Response of fiber Bragg grating transmission dips at twice the Bragg wavelength to transverse strain

Harpreet K Bal; Fotios Sidiroglou; Sui P. Yam; Zourab Brodzeli; Scott A. Wade; Gregory W. Baxter; Stephen F. Collins

doi:10.1117/12.837539

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5 October 2009 Response of fiber Bragg grating transmission dips at twice the Bragg wavelength to transverse strain

Harpreet K Bal, Fotios Sidiroglou, Sui P. Yam, Zourab Brodzeli, Scott A. Wade, Gregory W. Baxter, Stephen F. Collins

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Proceedings Volume 7503, 20th International Conference on Optical Fibre Sensors; 750337 (2009) https://doi.org/10.1117/12.837539
Event: 20th International Conference on Optical Fibre Sensors, 2009, Edinburgh, United Kingdom

Abstract

The effect of transverse strain on a fiber Bragg grating fabricated using a phase mask with 536-nm pitch has been investigated through the study of its reflection and transmission features at twice the Bragg wavelength near 1552 nm, that are due to reflection/transmission from FBG periodicities associated with the phase mask periodicity. The occurrence of two peaks in the reflection spectrum is due to the interleaved refractive index modulations along the fiber core, with the periodicity of the phase mask that produces a type of π-phaseshifted grating. The response of these features to transverse strain is similar to that observed previously for features at 2/3 of the Bragg wavelength that also arise from the same complex refractive index structure.

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Harpreet K Bal, Fotios Sidiroglou, Sui P. Yam, Zourab Brodzeli, Scott A. Wade, Gregory W. Baxter, and Stephen F. Collins "Response of fiber Bragg grating transmission dips at twice the Bragg wavelength to transverse strain", Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 750337 (5 October 2009); https://doi.org/10.1117/12.837539

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