Optical fibers with depressed claddings for suppression of coupling into cladding modes in fiber Bragg gratings
β Scribed by Dong, L.; Reekie, L.; Cruz, J.L.; Caplen, J.E.; de Sandro, J.P.; Payne, D.N.
- Book ID
- 119785893
- Publisher
- IEEE
- Year
- 1997
- Tongue
- English
- Weight
- 471 KB
- Volume
- 9
- Category
- Article
- ISSN
- 1041-1135
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## Abstract We experimentally investigate the cladding mode coupling loss of fiber Bragg gratings written in holeβassisted fibers. The cladding mode coupling loss is remarkably suppressed due to air holes inside of the silica cladding. The reduction of cladding mode coupling loss of less than βΌ0.33
The effect on the Bragg-grating-induced cladding-mode coupling of varying the extent of the photosensitive region in a step-index fiber is analyzed. We introduce a figure of merit for the suppression of cladding-mode loss and compare different matched cladding fiber designs. It is found to be advant