Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Coexisting periodic attractors in injection locked diode lasers   We present experimental evidence for coexisting periodic attractors in a
semiconductor laser subject to external optical injection. The coexisting
attractors appear after the semiconductor laser has undergone a Hopf
bifurcation from the locked steady state. We consider the single mode rate
equations and derive a third order differential equation for the phase of the
laser field. We then analyze the bifurcation diagram of the time periodic
states in terms of the frequency detuning and the injection rate and show the
existence of multiple periodic attractors.

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The categories of this paper are: acc-phys
2
The categories of this paper are: math
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The categories of this paper are: dg-ga
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The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph
8
The categories of this paper are: hep-ex
6
The categories of this paper are: astro-ph
34
The categories of this paper are: chem-ph
13
The categories of this paper are: quant-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: solv-int
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The categories of this paper are: q-alg
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The categories of this paper are: alg-geom
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The categories of this paper are: funct-an
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The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th