| Publication No: 3053 | Search all ORC publications |
Fiber Bragg grating inscription by high-intensity femtosecond UV laser light: comparison with other existing methods of fabrication
Stephen A.Slattery and David N.Nikogosyan
Department of Physics, National University of Ireland, University College Cork, Cork, Ireland
Gilberto Brambilla
Optoelectronics Research Centre, University of Southampton, UK
Abstract
By use of high-intensity (~200 GW/cm2) femtosecond 264-nm laser light and a phase mask technique, Bragg grating inscription in a range of different photosensitive and standard telecom fibers (both H2-free and H2-loaded) was studied. The dependences of the induced refractive index modulation versus the incident fluence as well as the thermal decay curves were compared with similar dependences for gratings fabricated by other existing methods. It was shown that with high-intensity UV laser irradiation, two-quantum photoreactions occur in the irradiated fiber core, that result in a significant photosensitivity enhancement of the investigated fibers in comparison with conventional low-intensity 248-nm exposure (by 6–128 times, depending on fiber type and irradiation intensity).
See also related errata, ORC reference 3704
Journal of the Optical Society of America B (2005) Vol.22(2) pp.354-361
Click here to request a preprint of this paper. (Please mention the paper number)
Copyright University of Southampton 2006