Summary
International Symposium on Nonlinear Theory and Its Applications
2015
Session Number:A2L-C
Session:
Number:A2L-C-4
Nonlinear Laser Dynamics with Suppressed Time-Delay Signatures by FBGs
Song-Sui Li, Xiao-Zhou Li, Jun-Ping Zhuang, Sze-Chun Chan,
pp.45-48
Publication Date:2015/12/1
Online ISSN:2188-5079
Summary:
Chaotic dynamics in a single-mode semiconductor laser subject to optical feedback from fiber Bragg gratings (FBGs) is investigated. Obtained from the inverse Fourier transform on the magnitude of the optical spectra, the coherence function evaluates the suppression of the time-delay information. The intensity autocorrelation function time-delay signature (ACF-TDS) and coherence function time-delay signature (CF-TDS) are found to be sensitive to the FBG bandwidth. The FBG feedback with proper bandwidth and positive detuning frequency can achieve both ACF-TDS concealment and CF-TDS minimization in chaotic oscillation. Moreover, the TDS-optimized chaos can be generally obtained over a range of feedback delay times. Besides, comparing to conventional mirror feedback, the FBG feedback suppresses the ACF-TDS by more than an order of magnitude in the experiments.