Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Comparison of Models of Fast Saturable Absorption in Passively
  Modelocked Lasers   Fast saturable absorbers (FSAs) play a critical role in stabilizing many
passively modelocked lasers. The most commonly used averaged model to study
these lasers is the Haus modelocking equation (HME) that includes a third-order
nonlinear FSA. However, it predicts a narrow region of stability that is
inconsistent with experiments. To better replicate the laser physics, averaged
laser models that include FSAs with higher-than-third-order nonlinearities have
been introduced. Here, we compare three common FSA models to each other and to
the HME using the recently-developed boundary tracking algorithms. The three
FSA models are the cubic-quintic model, the sinusoidal model, and the algebraic
model. We find that all three models predict the existence of a stable
high-energy solution that is not present in the HME and have a much larger
stable operating region. We also find that all three models predict
qualitatively similar stability diagrams. We conclude that averaged laser
models that include FSAs with higher-than-third-order nonlinearity should be
used when studying the stability of passively modelocked lasers.

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The categories of this paper are: hep-ph
28
The categories of this paper are: alg-geom
17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex
13
The categories of this paper are: quant-ph
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
9
The categories of this paper are: nlin
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
24
The categories of this paper are: dg-ga
4
The categories of this paper are: cond-mat
6
The categories of this paper are: astro-ph
21
The categories of this paper are: adap-org
29
The categories of this paper are: funct-an