Time-delay signature concealed broadband gain-coupled chaotic laser with fiber random grating induced distributed feedback
Abstract
A broadband chaotic laser with a flat power spectrum extending up to ∼7.53 GHz is achieved by injecting continuous wave laser light into a chaotic diode laser perturbed by fiber random grating induced distributed feedback, which forms a gain-coupled chaotic laser system. More than triple bandwidth enhancement is realized with appropriate frequency detuning between the master and slave lasers. Unlike normal chaotic lasers, the output from such a broadband chaotic laser is free from time-delay signature, which can be potentially applied for practical random number generations and will find useful applications in the fields of information security and computation systems.
- Publication:
-
Optics Laser Technology
- Pub Date:
- January 2019
- DOI:
- 10.1016/j.optlastec.2018.08.057
- arXiv:
- arXiv:1807.10859
- Bibcode:
- 2019OptLT.109..654X
- Keywords:
-
- Lasers;
- Distributed-feedback;
- Semiconductor lasers;
- Instabilities and chaos;
- Physics - Optics
- E-Print:
- 5 pages, 5 figures