Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Extreme events induced by collisions in a forced semiconductor laser   We report on the experimental study of an optically driven multimode
semiconductor laser with 1~m cavity length. We observed a spatiotemporal regime
where real time measurements reveal very high intensity peaks in the laser
field. Such a regime, which coexists with the locked state and with stable
phase solitons, is characterized by the emergence of extreme events which
produce a heavy tail statistics in the probability density function. We
interpret the extreme events as collisions of spatiotemporal structures with
opposite chirality. Numerical simulations of the semiconductor laser model,
showing very similar dynamical behavior, substantiate our evidences and
corroborate the description of such interactions as collisions between phase
solitons and transient structures with different phase rotations.

1
The categories of this paper are: cs
24
The categories of this paper are: dg-ga
29
The categories of this paper are: funct-an
21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom
4
The categories of this paper are: cond-mat
37
The categories of this paper are: supr-con
18
The categories of this paper are: econ
2
The categories of this paper are: math
8
The categories of this paper are: hep-ex
12
The categories of this paper are: nucl-th
14
The categories of this paper are: math-ph
36
The categories of this paper are: cmp-lg
15
The categories of this paper are: nucl-ex
23
The categories of this paper are: solv-int
11
The categories of this paper are: hep-lat