Journal ArticleDOI
Bandwidth-enhanced chaos synchronization in strongly injection-locked semiconductor lasers with optical feedback.
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TLDR
Using a bandwidth-enhanced semiconductor laser as a chaotic transmitter and receiver, it is shown that transmitter and the receiver lasers in a complete chaos synchronization scheme can be synchronized in a completely chaotic manner.Abstract:
Bandwidth-enhanced chaos synchronization in strongly injection-locked semiconductor lasers with optical feedback is numerically studied based on laser rate equations. The bandwidth of the chaotic carrier frequency in a semiconductor laser with optical feedback is expanded roughly three times by strong optical injection compared with the bandwidth when there is no optical injection. Using a bandwidth-enhanced semiconductor laser as a chaotic transmitter and receiver, we synchronized transmitter and the receiver lasers in a complete chaos synchronization scheme.read more
Citations
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Journal ArticleDOI
Fast random bit generation with bandwidth-enhanced chaos in semiconductor lasers
Kunihito Hirano,Taiki Yamazaki,Shinichiro Morikatsu,Haruka Okumura,Hiroki Aida,Atsushi Uchida,Shigeru Yoshimori,Kazuyuki Yoshimura,Takahisa Harayama,Peter Davis +9 more
TL;DR: In this article, random bits are generated by bitwise exclusive-OR operation on corresponding bits in samples of the chaotic signal and its time-delayed signal and statistical tests verify the randomness of bit sequences obtained using 1 to 6 bits per sample, corresponding to fast random bit generation rates from 12.5 to 75 Gigabit per second.
Journal ArticleDOI
Enhancing the Bandwidth of the Optical Chaotic Signal Generated by a Semiconductor Laser With Optical Feedback
TL;DR: In this article, a distributed feedback semiconductor laser with optical feedback is employed as the chaotic laser and the bandwidth of the chaotic signal is enhanced roughly three times by optical injection into chaotic laser compared with the bandwidth when there is no optical injection.
Journal ArticleDOI
Tb/s physical random bit generation with bandwidth-enhanced chaos in three-cascaded semiconductor lasers
TL;DR: Fast physical random bit generation from bandwidth-enhanced chaos by using three-cascaded semiconductor lasers is experimentally demonstrated by using both NIST Special Publication 800-22 and TestU01.
Journal ArticleDOI
Generation of wideband chaos with suppressed time-delay signature by delayed self-interference
TL;DR: The results show that, the DSI can eliminate the domination of laser relaxation oscillation existing in the chaotic laser light and therefore flatten and widen the power spectrum.
Journal ArticleDOI
Effective Bandwidths of Broadband Chaotic Signals
TL;DR: In this paper, the authors proposed a new definition for the effective bandwidths of the broadband chaotic signals, which sums up only those discrete spectral segments of the chaos power spectrum accounting for 80% of the total power.
References
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Journal ArticleDOI
Synchronization in chaotic systems
TL;DR: This chapter describes the linking of two chaotic systems with a common signal or signals and highlights that when the signs of the Lyapunov exponents for the subsystems are all negative the systems are synchronized.
Journal ArticleDOI
Chaos synchronization and chaotic signal masking in semiconductor lasers with optical feedback
TL;DR: Theoretical and experimental investigations of chaos synchronization and its application to chaotic data transmissions in semiconductor lasers with optical feedback are presented in this article, where the conditions for chaos synchronization in the systems and the robustness for the parameter mismatches are studied.
Journal ArticleDOI
Bandwidth enhancement and broadband noise reduction in injection-locked semiconductor lasers
TL;DR: Injection locking of a semiconductor laser can significantly improve the broadband modulation characteristics as mentioned in this paper, by adjusting the frequency offset between the master laser and the slave laser, improved modulation bandwidth or flatness of the modulation response can be emphasized.
Journal ArticleDOI
Demonstration of optical synchronization of chaotic external-cavity laser diodes
S. Sivaprakasam,K.A. Shore +1 more
TL;DR: An experimental demonstration of optical synchronization of chaotic external-cavity semiconductor laser diodes is reported for what is believed to be the first time.
Journal ArticleDOI
Enhancement of modulation bandwidth of laser diodes by injection locking
TL;DR: In this article, the authors suggest a new method for significantly enhancing the intrinsic bandwidth of a laser diode through the use of an injection locking technique, which shows that for moderate and high injection levels, the bandwidth can be increased to several times its free-running bandwidth.