Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Reduced models and design principles for half-harmonic generation in
  synchronously-pumped optical parametric oscillators   We develop reduced models that describe half-harmonic generation in a
synchronously-pumped optical parametric oscillator above threshold, where
nonlinearity, dispersion, and group-velocity mismatch are all relevant. These
models are based on (1) an eigenmode expansion for low pump powers, (2) a
simulton-like sech-pulse ansatz for intermediate powers, and (3) dispersionless
box-shaped pulses for high powers. Analytic formulas for pulse compression,
degenerate vs. nondegenerate operation, and stability are derived and compared
to numerical and experimental results.

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The categories of this paper are: hep-ph
18
The categories of this paper are: econ
1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org
26
The categories of this paper are: bayes-an
19
The categories of this paper are: eess
6
The categories of this paper are: astro-ph
8
The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
29
The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat
7
The categories of this paper are: hep-th
35
The categories of this paper are: mtrl-th
14
The categories of this paper are: math-ph
12
The categories of this paper are: nucl-th