Techniques for Modeling Fiber Laser Amplifiers

Gopalakrishnan, Jay; Goswami, Tathagata; Grosek, Jacob

doi:10.1007/978-3-030-44101-2_5

Cited by 1 publication

(1 citation statement)

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“…We have included a simplified, yet very typical, mathematical formulation for the dopant ion population dynamics in Section 3. A few of the initial results obtained in this work for the simpler Yb-doped case were announced earlier in the conference proceedings [6]. We begin by deriving the CMT model next.…”

Section: Introductionmentioning

confidence: 99%

Simulation of optical fiber amplifier gain using equivalent short fibers

Drake

Gopalakrishnan

Goswami

et al. 2020

Computer Methods in Applied Mechanics and Engineering

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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.

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Section: Introductionmentioning

confidence: 99%