Fabrication and sensing characteristics of helical long-period fiber gratings written in the rotated fiber by CO2 laser

Liang Zhang; Yunqi Liu; Hongliang Song; Tingyun Wang

doi:10.1117/12.2194627

28 September 2015 Fabrication and sensing characteristics of helical long-period fiber gratings written in the rotated fiber by CO₂ laser

Liang Zhang, Yunqi Liu, Hongliang Song, Tingyun Wang

Author Affiliations +

Proceedings Volume 9634, 24th International Conference on Optical Fibre Sensors; 96346Y (2015) https://doi.org/10.1117/12.2194627
Event: International Conference on Optical Fibre Sensors (OFS24), 2015, Curitiba, Brazil

Abstract

A helical long-period grating (HLPG) was fabricated by twisting a conventional single-mode fiber when CO₂ laser beam was sweeping along the fiber axis. A grating with a contrast of 20 dB can be written in the fiber with a length of 1 cm. The spectral and sensing characteristics were investigated experimentally. The maximum sensitivity to surrounding refractive index and temperature measurement was measured to be 995 nm/RIU and 53 pm/°C, respectively.

Citation Download Citation

Liang Zhang, Yunqi Liu, Hongliang Song, and Tingyun Wang "Fabrication and sensing characteristics of helical long-period fiber gratings written in the rotated fiber by CO₂ laser", Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 96346Y (28 September 2015); https://doi.org/10.1117/12.2194627

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