Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Mode switching in ring lasers with delayed optical feedback   We have demonstrated that a rather weak external optical feedback with delay
can lead to the mode switching of the counterpropogating modes. The delay time
should be longer then any system characteristic time. The equations describing
the ring resonator with the delayed optical feedback was obtained from the
first principles. The analytical formula for the necessary external feedback
strength was derived. Other than the regular behavior, the system demonstrates
a complex chaotic behavior.

35
The categories of this paper are: mtrl-th
6
The categories of this paper are: astro-ph
29
The categories of this paper are: funct-an
1
The categories of this paper are: cs
13
The categories of this paper are: quant-ph
28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
34
The categories of this paper are: chem-ph
36
The categories of this paper are: cmp-lg
2
The categories of this paper are: math
27
The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex
5
The categories of this paper are: gr-qc
21
The categories of this paper are: adap-org
0
The categories of this paper are: hep-ph
26
The categories of this paper are: bayes-an