Nonlinear Theory and Its Applications, IEICE
Online ISSN : 2185-4106
ISSN-L : 2185-4106
Special Section on Communication Sciences and Multimedia Information Systems
Numerical study on dynamics-dependent synchronization in mutually-coupled lasers with asymmetric feedback
Shoma OharaKazutaka KannoAtsushi Uchida
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2019 Volume 10 Issue 1 Pages 60-73

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Abstract

We numerically investigate the change in synchronization property in different frequency components associated with laser dynamics, which is termed dynamics-dependent synchronization, in two mutually-coupled semiconductor lasers. We introduce an optical amplifier to implement asymmetric feedback, and we change the feedback strength of one of the two coupled lasers to observe dynamics-dependent synchronization. In-phase synchronization is observed for the original signals, while anti-phase synchronization is found for the low-pass-filtered signals, in the presence of low-frequency fluctuation dropouts. We analyze dynamics-dependent synchronization by observing temporal changes in the short-term cross-correlation and the local optical frequency detuning.

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© 2019 The Institute of Electronics, Information and Communication Engineers
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