Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Feedback induced locking in semiconductor lasers with strong
  amplitude-phase coupling   The influence of optical feedback on semiconductor lasers has been a widely
studied field of research due to fundamental interests as well as the
optimization of optical data transmission and computing. Recent publications
have shown that it is possible to induce a periodic pulsed like output in
quantum-dot and quantum-well laser diodes utilizing the locking of the external
cavity modes and the relaxation oscillation frequency. We present an in-depth
analysis of this effect. We choose submonolayer quantum dots as a gain system,
as these provide a relatively strong amplitude-phase coupling, which has proven
to be very beneficial for these locking effects to occur. Introducing a new
theoretical model we can correctly reproduce the essential features of the gain
system and validate them by comparison to our experimental results. From this
starting point we can further explore how the staircase behavior of the
oscillation frequency with increasing pump current can be influenced by
changing various laser parameters. The staircase behavior is induced by a
reordering of the Hopf bifurcations giving birth to the regular pulsed-like
oscillations.

27
The categories of this paper are: comp-gas
28
The categories of this paper are: alg-geom
37
The categories of this paper are: supr-con
11
The categories of this paper are: hep-lat
0
The categories of this paper are: hep-ph
34
The categories of this paper are: chem-ph
15
The categories of this paper are: nucl-ex
8
The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an
18
The categories of this paper are: econ
21
The categories of this paper are: adap-org
30
The categories of this paper are: q-alg
10
The categories of this paper are: q-bio
20
The categories of this paper are: acc-phys
12
The categories of this paper are: nucl-th
19
The categories of this paper are: eess