Randomness extraction from a chaotic laser diode with dispersive self-injection

Song-Sui Li; Xiao-Zhou Li; Jun-Ping Zhuang; Sze-Chun Chan

doi:10.1117/12.2214841

4 March 2016 Randomness extraction from a chaotic laser diode with dispersive self-injection

Song-Sui Li, Xiao-Zhou Li, Jun-Ping Zhuang, Sze-Chun Chan

Proceedings Volume 9742, Physics and Simulation of Optoelectronic Devices XXIV; 97420C (2016) https://doi.org/10.1117/12.2214841
Event: SPIE OPTO, 2016, San Francisco, California, United States

Abstract

High-speed generation of random bits has attracted much attention recently using chaotic dynamics in laser diodes subject to different perturbations. Extraction of randomness has been investigated from a chaotic laser using selfinjection from a grating with dispersion. While the optical feedback invokes chaos, the dispersion induces different delays to different frequency components to conceal the information of the feedback delay time. Experimentally, random bits were extracted using a laser under feedback from a grating. The undesirable time-delay signature (TDS) was reduced by about 10 times. So a continuously tunable sampling rate was allowed for random bit generation (RBG), where the overall output rate tunable across 3 orders of magnitude up to 100 Gbps was demonstrated. Numerically, the concealment of TDS is further investigated using a rate-equation model incorporating self-injection through an all-pass filter (APF), which is realized by coupling the feedback path to a lossless ring cavity. While the APF provides dispersion to suppress the TDS, the APF provides no frequency selectivity so that a large chaotic bandwidth is attained. For minimal TDS, the coupling ratio to the ring is optimized at 0.5. The round-trip time of the ring also needs to be sufficiently long for inducing dispersion in the chaotic light. With comparable performance in TDS suppression, the APF feedback can generate chaos with broader bandwidth than grating feedback. The results are applicable to generating random bits for digital systems with widely tunable rates.

Citation Download Citation

Song-Sui Li, Xiao-Zhou Li, Jun-Ping Zhuang, and Sze-Chun Chan "Randomness extraction from a chaotic laser diode with dispersive self-injection", Proc. SPIE 9742, Physics and Simulation of Optoelectronic Devices XXIV, 97420C (4 March 2016); https://doi.org/10.1117/12.2214841

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
10 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Chromium

Chaos

Fiber Bragg gratings

Semiconductor lasers

Picosecond phenomena

Mirrors

Coherence (optics)

Show All Keywords

Keywords/Phrases

Search In:

Publication Years