Chaotic time-delay signature suppression with bandwidth broadening by fiber propagation.

Chaotic emission of a semiconductor laser is investigated through propagation over a fiber for achieving broadening of the bandwidth and suppression of the time-delay signature (TDS). Subject to delayed optical feedback, the laser first generates chaos with a limited bandwidth and an undesirable TDS. The laser emission is then delivered over a standard single-mode fiber for experiencing self-phase modulation, together with anomalous group-velocity dispersion, which leads to the broadening of the optical bandwidth and suppression of the TDS in the intensity signal. The effects are enhanced as the input power launched to the fiber increases. By experimentally launching up to 340 mW into a 20 km fiber, the TDS is suppressed by 10 times to below 0.04, while the bandwidth is broadened by six times to above 100 GHz. The improvement of the chaotic signal is potentially useful in random bit generation and range detection applications.

[1]  M. C. Soriano,et al.  Complex photonics: Dynamics and applications of delay-coupled semiconductors lasers , 2013 .

[2]  Romain Modeste Nguimdo,et al.  Role of the phase in the identification of delay time in semiconductor lasers with optical feedback. , 2011, Optics letters.

[3]  A. Locquet,et al.  Compressive Sensing with Optical Chaos , 2016, Scientific Reports.

[4]  Sze-Chun Chan,et al.  Randomness evaluation for an optically injected chaotic semiconductor laser by attractor reconstruction. , 2016, Physical review. E.

[5]  D. Rontani,et al.  Enhanced complexity of optical chaos in a laser diode with phase-conjugate feedback. , 2016, Optics letters.

[6]  Xiao-Zhou Li,et al.  Heterodyne Random Bit Generation Using an Optically Injected Semiconductor Laser in Chaos , 2013, IEEE Journal of Quantum Electronics.

[7]  Sze-Chun Chan,et al.  Distributed Feedbacks for Time-Delay Signature Suppression of Chaos Generated From a Semiconductor Laser , 2012, IEEE Photonics Journal.

[8]  A. Uchida,et al.  Fast physical random bit generation with chaotic semiconductor lasers , 2008 .

[9]  Xie Wang,et al.  Modulation instability in a highly nonlinear fiber for discrete-time pulsed random bit generation. , 2015, Optics letters.

[10]  Xiaoyi Bao,et al.  Time-delay signature suppression in a chaotic semiconductor laser by fiber random grating induced random distributed feedback. , 2017, Optics letters.

[11]  D S Citrin,et al.  Loss of time-delay signature in the chaotic output of a semiconductor laser with optical feedback. , 2007, Optics letters.

[12]  Ingo Fischer,et al.  Autocorrelation properties of chaotic delay dynamical systems: A study on semiconductor lasers. , 2014, Physical review. E, Statistical, nonlinear, and soft matter physics.

[13]  Song-Ju Kim,et al.  Ultrafast photonic reinforcement learning based on laser chaos , 2017, Scientific Reports.

[14]  Wei Pan,et al.  Suppression of Chaos Time Delay Signature in a Ring Network Consisting of Three Semiconductor Lasers Coupled With Heterogeneous Delays , 2016, Journal of Lightwave Technology.

[15]  Jun-Da Chen,et al.  3D pulsed chaos lidar system. , 2018, Optics express.

[16]  F. Lin,et al.  Effective Bandwidths of Broadband Chaotic Signals , 2012, IEEE Journal of Quantum Electronics.

[17]  Fan-Yi Lin,et al.  Chaos time delay signature suppression and bandwidth enhancement by electrical heterodyning. , 2015, Optics express.

[18]  Jiagui Wu,et al.  Suppression of time delay signatures of chaotic output in a semiconductor laser with double optical feedback. , 2009, Optics express.

[19]  Laurent Larger,et al.  Chaos-based communications at high bit rates using commercial fibre-optic links , 2005, Nature.

[20]  Laurent Larger,et al.  Random walks and random numbers from supercontinuum generation. , 2012, Optics express.

[21]  M. C. Soriano,et al.  Time Scales of a Chaotic Semiconductor Laser With Optical Feedback Under the Lens of a Permutation Information Analysis , 2011, IEEE Journal of Quantum Electronics.

[22]  Sze-Chun Chan,et al.  Random bit generation at tunable rates using a chaotic semiconductor laser under distributed feedback. , 2015, Optics letters.

[23]  I. Kanter,et al.  An optical ultrafast random bit generator , 2010 .

[24]  Wei Pan,et al.  Loss of Time Delay Signature in Broadband Cascade-Coupled Semiconductor Lasers , 2012, IEEE Photonics Technology Letters.

[25]  S. Yoshimori,et al.  Characteristics of Fast Physical Random Bit Generation Using Chaotic Semiconductor Lasers , 2009, IEEE Journal of Quantum Electronics.

[26]  Yanhua Hong,et al.  Wideband Chaos With Time-Delay Concealment in Vertical-Cavity Surface-Emitting Lasers With Optical Feedback and Injection , 2014, IEEE Journal of Quantum Electronics.

[27]  K. Wong,et al.  Broadband optical chaos for stimulated Brillouin scattering suppression in power over fiber , 2011 .

[28]  Yuta Terashima,et al.  Random Number Generation From Intermittent Optical Chaos , 2017, IEEE Journal of Selected Topics in Quantum Electronics.

[29]  Kenichi Arai,et al.  Chaos laser chips with delayed optical feedback using a passive ring waveguide. , 2011, Optics express.

[30]  M. C. Soriano,et al.  Dynamics, correlation scaling, and synchronization behavior in rings of delay-coupled oscillators. , 2008, Physical review. E, Statistical, nonlinear, and soft matter physics.

[31]  Atsushi Uchida,et al.  Tb/s physical random bit generation with bandwidth-enhanced chaos in three-cascaded semiconductor lasers. , 2015, Optics express.

[32]  M. Benedetti,et al.  Private Message Transmission by Common Driving of Two Chaotic Lasers , 2010, IEEE Journal of Quantum Electronics.

[33]  L. Appeltant,et al.  Information processing using a single dynamical node as complex system , 2011, Nature communications.

[34]  K. Alan Shore,et al.  Physics and applications of laser diode chaos , 2015 .

[35]  Yuncai Wang,et al.  Time delay signature elimination of chaos in a semiconductor laser by dispersive feedback from a chirped FBG. , 2017, Optics express.

[36]  Anbang Wang,et al.  Chaotic Correlation Optical Time Domain Reflectometer Utilizing Laser Diode , 2008, IEEE Photonics Technology Letters.

[37]  H Thienpont,et al.  Physical random bit generation from chaotic solitary laser diode. , 2014, Optics express.

[38]  Kun Qiu,et al.  Security-enhanced chaos communication with time-delay signature suppression and phase encryption. , 2016, Optics letters.

[39]  Kun Qiu,et al.  Generation of flat wideband chaos with suppressed time delay signature by using optical time lens. , 2017, Optics express.