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Mathematical Problems in Engineering
Volume 2013, Article ID 571393, 7 pages
Research Article

Suppression of Time Delay Signature in Chaotic Semiconductor Lasers with Filtered Optical Feedback

1Key Laboratory of Advanced Transducers & Intelligent Control System, Ministry of Education, Taiyuan 030024, China
2Institute of Optoelectronic Engineering, College of Physics & Optoelectronics, Taiyuan University of Technology, No. 79 Yingze West Street, Taiyuan, Shanxi 030024, China

Received 15 October 2013; Accepted 13 December 2013

Academic Editor: Hai Yu

Copyright © 2013 Yuan Wu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


We report the investigation of the time delay signature in chaotic semiconductor subject to delayed filtered optical feedback, of which a Fabry-Pérot interferometer type of filter is placed in the external cavity. The numerical results show that the suppression of time delay is dependent on the spectral width of the filter and its detuning from the solitary laser frequency. Such laser system will be helpful to acquire high quality chaotic signals.