Dynamics of thermal annealing of fibre gratings directly written by an infrared femtosecond laser

A. Martinez; I. Khrushchev; I. Bennion

doi:10.1117/12.605551

3 June 2005 Dynamics of thermal annealing of fibre gratings directly written by an infrared femtosecond laser

A. Martinez, I. Khrushchev, I. Bennion

Author Affiliations +

Proceedings Volume 5825, Opto-Ireland 2005: Optoelectronics, Photonic Devices, and Optical Networks; (2005) https://doi.org/10.1117/12.605551
Event: OPTO-Ireland, 2005, Dublin, Ireland

Abstract

The inscription of fibre Bragg gratings using infrared femtosecond laser offers a number of advantages over conventional methods based on UV inscription. The refractive index modification in femtosecond inscription is independent on defect formation and therefore should not experiment the defect-related thermal decay of UV inscribed gratings. In this paper, the response to thermal annealing of fiber Bragg gratings inscribed using a tightly focussed femtosecond laser is investigated. Experimental results reveal a vastly improve thermal stability compared to gratings inscribed using conventional methods based on UV light. Erasure was not observed until temperatures in the range between 900°C and 1000°C. These devices are therefore particularly suited to work in hostile environments and as high temperature sensors.

Citation Download Citation

A. Martinez, I. Khrushchev, and I. Bennion "Dynamics of thermal annealing of fibre gratings directly written by an infrared femtosecond laser", Proc. SPIE 5825, Opto-Ireland 2005: Optoelectronics, Photonic Devices, and Optical Networks, (3 June 2005); https://doi.org/10.1117/12.605551

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