Mismatch Robustness and Security of Chaotic Optical Communications Based on Injection-Locking Chaos Synchronization

2006 ◽  
Vol 42 (9) ◽  
pp. 953-960 ◽  
Author(s):  
X. Li ◽  
W. Pan ◽  
B. Luo ◽  
D. Ma
Keyword(s):  
Optical Communications ◽  
Chaos Synchronization ◽  
Injection Locking

scholarly journals Spin Laser Local Oscillators for Homodyne Detection in Coherent Optical Communications

Micromachines ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 573
Author(s):  
Nobuhide Yokota ◽  
Hiroshi Yasaka
Keyword(s):  
Spin Polarization ◽  
Optical Communications ◽  
Injection Locking ◽  
Optical Data ◽  
Cavity Surface ◽  
Orthogonal Polarization ◽  
Linear Birefringence ◽  
Polarization Modulation ◽  
Homodyne Detection ◽  
Local Oscillators

We numerically investigate spin-controlled vertical-cavity surface-emitting lasers (spin-VCSELs) for local oscillators, which are based on an injection locking technique used in coherent optical communications. Under the spin polarization modulation of an injection-locked spin-VCSEL, frequency-shifted and phase-correlated optical sidebands are generated with an orthogonal polarization against the injection light, and one of the sidebands is resonantly enhanced due to the linear birefringence in the spin-VCSEL. We determine that the peak strength and peak frequency in the spin polarization modulation sensitivity of the injection-locked spin-VCSEL depend on detuning frequency and injection ratio conditions. As a proof of concept, 25-Gbaud and 16-ary quadrature amplitude modulation optical data signals and a pilot tone are generated, and the pilot tone is used for the injection locking of a spin-VCSEL. An orthogonally-polarized modulation sideband generated from the injection-locked spin-VCSEL is used as a frequency-shifted local oscillator (LO). We verify that the frequency-shifted LO can be used for the homodyne detection of optical data signals with no degradation. Our findings suggest a novel application of spin-VCSELs for coherent optical communications.

32  Gb/s chaotic optical communications by deep-learning-based chaos synchronization

2019 ◽  
Vol 44 (23) ◽  
pp. 5776 ◽  
Author(s):  
Junxiang Ke ◽  
Lilin Yi ◽  
Zhao Yang ◽  
Yunpeng Yang ◽  
Qunbi Zhuge ◽  
...  
Keyword(s):  
Deep Learning ◽  
Optical Communications ◽  
Chaos Synchronization

COMPLEXITY AND SYNCHRONIZATION IN CHAOTIC INJECTION-LOCKING SEMICONDUCTOR LASERS

2011 ◽  
Vol 25 (26) ◽  
pp. 2061-2067 ◽  
Author(s):  
LEI YANG ◽  
WEI PAN ◽  
LIAN SHAN YAN ◽  
BIN LUO ◽  
SHUI YING XIANG ◽  
...  
Keyword(s):  
Semiconductor Lasers ◽  
Chaos Synchronization ◽  
Injection Locking ◽  
Permutation Entropy ◽  
Feedback Delay ◽  
Slave Laser ◽  
Master Laser ◽  
Feedback Strength ◽  
Chaotic Signals ◽  
The One

The chaotic complexity properties of semiconductor lasers in the chaotic synchronization systems are investigated numerically, based on the information theory based quantifier, the permutation entropy (PE). We find that, on the one hand, the degree of complexity for the master laser increases with the feedback strength firstly and then saturate at higher feedback strength, but are hardly affected by the feedback delay. On the other hand, for the slave laser, the complexity degree is closer to that for the master laser when the high quality chaos synchronization is obtained, which shows that, the PE method is a successful quantifier to evaluate the degree of complexity for the chaotic signals in chaos synchronization systems, and can be considered as a complementary tool to observe the synchronization quality.

scholarly journals Injection-locking chaos synchronization and communication in closed-loop semiconductor lasers subject to phase-conjugate feedback

2020 ◽  
Vol 28 (7) ◽  
pp. 9477 ◽  
Author(s):  
Ning Jiang ◽  
Anke Zhao ◽  
Shiqin Liu ◽  
Yiqun Zhang ◽  
Jiafa Peng ◽  
...  
Keyword(s):  
Semiconductor Lasers ◽  
Chaos Synchronization ◽  
Closed Loop ◽  
Injection Locking ◽  
Phase Conjugate

Synchronization of Chaotic Quantum Dot Light Emitting Diodes under Optical Feedback Effect

2020 ◽  
pp. 144-148
Keyword(s):  
Quantum Dot ◽  
Delay Time ◽  
Chaos Synchronization ◽  
Optical Feedback ◽  
Light Emitting Diode ◽  
Feedback Effect ◽  
Complete Synchronization ◽  
Light Emitting ◽  
Coupling Methods ◽  
Coupling Parameters

Chaos synchronization of delayed quantum dot light emitting diode has been studied theortetically which are coupled via the unidirectional and bidirectional. at synchronization of chaotic, The dynamics is identical with delayed optical feedback for those coupling methods. Depending on the coupling parameters and delay time the system exhibits complete synchronization, . Under proper conditions, the receiver quantum dot light emitting diode can be satisfactorily synchronized with the transmitter quantum dot light emitting diode due to the optical feedback effect.

Noise Effects on Generalized Chaos Synchronization in Semiconductor Lasers

2014 ◽  
Vol 2 ◽  
pp. 413-416
Author(s):  
Kenichi Arai ◽  
Susumu Shinohara ◽  
Satoshi Sunada ◽  
Kazuyuki Yoshimura ◽  
Takahisa Harayama ◽  
...  
Keyword(s):  
Semiconductor Lasers ◽  
Chaos Synchronization ◽  
Noise Effects

A Novel Turbo Coded Modulation Scheme for Deep Space Optical Communications

2010 ◽  
Vol E93.B (5) ◽  
pp. 1260-1263 ◽  
Author(s):  
Sangmok OH ◽  
Inho HWANG ◽  
Adrish BANERJEE ◽  
Jeong Woo LEE
Keyword(s):  
Optical Communications ◽  
Coded Modulation ◽  
Modulation Scheme ◽  
Deep Space ◽  
Turbo Coded Modulation
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