Affiliation:
1. Taiyuan University of Technology
2. Shanxi Transportation Technology Research & Development Co., Ltd.
Abstract
The effect of resolution bandwidth (RBW) and video bandwidth (VBW) of a radio-frequency spectrum analyzer on the characteristics of a power spectrum for chaos generated by a semiconductor laser with external optical feedback is investigated experimentally and numerically. We describe the spectral characteristics with effective bandwidth and time-delay signature (TDS) quantificationally. The experimental results demonstrate that the ratio of VBW to RBW has a significant impact on the smoothness of the power spectrum and effective bandwidth of chaos. Meanwhile, the RBW affects the resolution of periodical peaks of the power spectrum and the TDS of chaos, which is obtained by the power spectrum. The incorrect characterization of chaos can be avoided by setting the RBW to no more than 0.1 times as much as the resonance frequency of the external cavity of chaos and setting the VBW/RBW to no more than 0.01. The simulation results qualitatively agree with the analysis of the experiment.
Funder
National Natural Science Foundation of China
Patent Promotion and Exploitation Program of Shanxi Province
Transformation of Scientific and Technological Achievements Programs of Higher Education Institutions in Shanxi
Shanxi “1331 Project” Key Innovative Research Team
Program for Sanjin Scholar
Subject
Atomic and Molecular Physics, and Optics,Engineering (miscellaneous),Electrical and Electronic Engineering
Cited by
1 articles.
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