Title

Simulation of Optical Fiber Amplifier Gain Using Equivalent Short Fibers

Published In

Computer Methods in Applied Mechanics and Engineering

Document Type

Citation

Publication Date

3-1-2020

Abstract

Electromagnetic wave propagation in optical fiber amplifiers obeys Maxwell equations. Using coupled mode theory, the full Maxwell system within an optical fiber amplifier is reduced to a simpler model. The simpler model is made more efficient through a new scale model, referred to as an equivalent short fiber, which captures some of the essential characteristics of a longer fiber. The equivalent short fiber can be viewed as a fiber made using artificial (unphysical) material properties that in some sense compensates for its reduced length. The computations can be accelerated by a factor approximately equal to the ratio of the original length to the reduced length of the equivalent fiber. Computations using models of two commercially available fibers – one doped with ytterbium, and the other with thulium – show the practical utility of the concept. Extensive numerical studies are conducted to assess when the equivalent short fiber model is useful and when it is not.

Description

Copyright © 2020 Elsevier

DOI

10.1016/j.cma.2019.112698

Persistent Identifier

https://archives.pdx.edu/ds/psu/32517

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