Dual resonant peaks of LP 015 claddingmode in long-period gratings
- 15 April 1999
- journal article
- Published by Institution of Engineering and Technology (IET) in Electronics Letters
- Vol. 35 (8) , 649-651
- https://doi.org/10.1049/el:19990442
Abstract
It is found that the coupling of the guided core mode to a higher order cladding mode may lead to dual resonant wavelengths in long-period gratings (LPGs). The dual peaks of the LP015 cladding mode have been observed to shift towards each other during the second exposure of a 100 µm period grating. It is also shown that the resonant wavelengths of LPGs can be tuned over a wide range by the post-exposure technique.Keywords
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