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Proceedings Paper

Bend distortion in large-mode-area amplifier fiber design
Author(s): John M. Fini
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Paper Abstract

As fibers with ever increasing mode area are used to enable high power fiber amplifiers and lasers, it important to use realistic models of bending in fiber design. The standard approach is to consider only the bend-induced losses and mode-coupling when designing an amplifier, even though changes in mode shape are well known in principle. But even coiling a fiber to fit into a reasonable package size produces large bend-induced distortion for fibers with large mode area. Here, several recent results are reviewed. Distortion significantly impacts amplifier performance by reducing the area, and can further degrade the interaction of light with the gain. Scaling rules for the distortion are derived from an intuitive sensitivity model. Bend distortion considerations lead to new strategies for large mode area fiber design, and cast existing strategies in a new light.

Paper Details

Date Published: 21 November 2007
PDF: 11 pages
Proc. SPIE 6781, Passive Components and Fiber-based Devices IV, 67810E (21 November 2007); doi: 10.1117/12.745949
Show Author Affiliations
John M. Fini, OFS Labs. (United States)

Published in SPIE Proceedings Vol. 6781:
Passive Components and Fiber-based Devices IV
Ming-Jun Li; Jianping Chen; Satoki Kawanishi; Ian H. White, Editor(s)

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