Open AccessPhase synchronization of chaotic lasers
Author(s) -
Dong Ik Kim,
Dae-Sic Lee,
Young-Jai Park,
Gyu Ug Kim,
Chil-Min Kim
Publication year - 2006
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/opex.14.000702
Subject(s) - laser , phase synchronization , phase (matter) , optics , phase portrait , physics , synchronization (alternating current) , chaotic , jump , coupling (piping) , materials science , computer science , telecommunications , quantum mechanics , bifurcation , nonlinear system , channel (broadcasting) , artificial intelligence , metallurgy
We experimentally investigate phase synchronization between two electronically coupled diode laser pumped Nd:YAG lasers. As the coupling strength increases, the phase of the two chaotic laser outputs develops from a nonsynchronous state to a phase synchronous one through a phase jump state. We find that there are 2pi phase jumps and a pi/2 phase shift between the two laser outputs unlike in optically coupled Nd:YAG lasers. To clarify the transition to phase synchronization with a pi/2 phase shift, we analyze the phenomenon of phase synchronization by using a phase portrait, phase difference dynamics, and frequency variation depending on the coupling strength and obtain the scaling rule of the average phase locking time in the intermittent phase jump state.