Apodisation of the spectral response of fibre Bragg gratings using a phase mask with variable diffraction efficiency
- 2 February 1995
- journal article
- Published by Institution of Engineering and Technology (IET) in Electronics Letters
- Vol. 31 (3), 222-223
- https://doi.org/10.1049/el:19950146
Abstract
Bragg gratings with sidelobe levels 26 dB lower than the peak reflectivity have been fabricated in standard telecommunication optical fibres by exposure to ultraviolet light through a phase mask with a locally varying diffraction efficiency. This represents a reduction of 14 dB in the sidelobe levels compared to uniform gratings with the same bandwidth and reflectivity.Keywords
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