Bragg grating induced cladding mode coupling causedby ultra-violet light absorption
- 14 May 1998
- journal article
- Published by Institution of Engineering and Technology (IET) in Electronics Letters
- Vol. 34 (10) , 1007-1009
- https://doi.org/10.1049/el:19980715
Abstract
A numerical model based on coupled-mode theory and accurate representation of the refractive index is shown to reproduce the transmission characteristics of Bragg gratings in depressed cladding fibres. It is demonstrated that a ghost dip on the short wavelength side of the Bragg reflection is caused by asymmetry from transverse absorption of ultra-violet light during writing, and cannot be eliminated by assuring zero blaze angle.Keywords
This publication has 2 references indexed in Scilit:
- Optical properties of photosensitive fiber phase gratingsJournal of Lightwave Technology, 1993
- Measurement of the ultraviolet absorption spectrum of optical fibersOptics Letters, 1992