Strong 157 nm F 2 -laser photosensitivity-locking of hydrogen-loaded telecommunication fibre for 248 nm fabrication of long-period gratings
- 3 January 2002
- journal article
- Published by Institution of Engineering and Technology (IET) in Electronics Letters
- Vol. 38 (1) , 17-19
- https://doi.org/10.1049/el:20020009
Abstract
Strong (>20 dB) long-period fibre gratings were fabricated by combining F2-laser photosensitivity-locking of hydrogen-soaked telecommunication fibre and KrF-laser grating formation. The 157 nm pretreatment permanently enhances the fibre photosensitivity response to the low-energy 248 nm photons. Thermal annealing at 120°C for 24 h improves the grating stability without diminishing the enhancement.Keywords
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