Open AccessFast dynamics of low-frequency fluctuations in a quantum-dot laser with optical feedback
Author(s) -
Kazuto Yamasaki,
Kazutaka Kanno,
Atsushi Matsumoto,
Kouichi Akahane,
Naokatsu Yamamoto,
Makoto Naruse,
Atsushi Uchida
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.426268
Subject(s) - quantum dot laser , physics , semiconductor laser theory , quantum dot , laser , bifurcation diagram , quantum optics , quantum fluctuation , optics , bifurcation , quantum , optoelectronics , quantum mechanics , nonlinear system
We experimentally investigate the complex dynamics of a multi-mode quantum-dot semiconductor laser with time-delayed optical feedback. We examine a two-dimensional bifurcation diagram of the quantum-dot laser as a comprehensive dynamical map by changing the injection current and feedback strength. We found that the bifurcation diagram contains two different parameter regions of low-frequency fluctuations. The power-dropout dynamics of the low-frequency fluctuations are observed in the sub-GHz region, which is considerably faster than the conventional low-frequency fluctuations in the MHz region. Comparing the dynamics of quantum-dot laser with those of single- and multi-mode quantum-well semiconductor lasers reveals that the fast low-frequency fluctuation dynamics are unique characteristics of quantum-dot lasers with time-delayed optical feedback.