Microwave Chaotic Signal Generation Based on an Optoelectronic Oscillator With Randomly Distributed Feedbacks

Microwave chaotic signal generation with suppressed time-delay signature (TDS) using an optoelectronic oscillator (OEO) with randomly distributed feedbacks is discussed. Thanks to the random distribution of the feedbacks, the time delays of the OEO become randomly distributed, which make the OEO be able to generate chaotic signals with significantly reduced TDS. In the implementation, the randomly distributed feedbacks can be introduced by either incorporating a single random sampled fiber Bragg grating (RS-FBG) in the OEO loop or using a randomly spaced multiwavelength light source. Experimental results have confirmed the effectiveness of the approach for chaotic signal generation with suppressed TDS.