Simulation of Bidirectional Long-Distance Chaos Communication Performance in a Novel Fiber-Optic Chaos Synchronization System

2013 ◽  
Vol 31 (3) ◽  
pp. 461-467 ◽  
Author(s):  
Jia-Gui Wu ◽  
Zheng-Mao Wu ◽  
Yu-Ran Liu ◽  
Li Fan ◽  
Xi Tang ◽  
...  
Keyword(s):  
Chaos Synchronization ◽  
Fiber Optic ◽  
Long Distance ◽  
Communication Performance ◽  
Synchronization System ◽  
Chaos Communication

Chaos communication using observer based chaos synchronization

1999 ◽  
Vol 32 (2) ◽  
pp. 2047-2052
Author(s):  
Toshimitsu Ushio ◽  
Eiji Inoue
Keyword(s):  
Chaos Synchronization ◽  
Chaos Communication

Analysis of prospects of fiber optic long-distance telephone network architecture

1991 ◽  
Vol 29 (7) ◽  
pp. 23-25
Author(s):  
L.E. Varakin ◽  
A.S. Adjemov ◽  
L.I. Golyayeva ◽  
A.F. Petrov ◽  
V.M. Tjomkin
Keyword(s):  
Network Architecture ◽  
Fiber Optic ◽  
Telephone Network ◽  
Long Distance

Distributed Fiber Optic Strain Sensing with Embedded Small-Diameter Optical Fibers in CFRP Laminate

2007 ◽  
Vol 334-335 ◽  
pp. 1013-1016
Author(s):  
Tadahito Mizutani ◽  
Takafumi Nishi ◽  
Nobuo Takeda
Keyword(s):  
Spatial Resolution ◽  
Optical Fibers ◽  
Composite Structures ◽  
Fiber Optic ◽  
Current Trend ◽  
Small Diameter ◽  
Long Distance ◽  
Distributed Sensors ◽  
Cfrp Laminate ◽  
Sensing Applications

Although demand for composite structures rapidly increase due to the advantages in weight, there are few effective assessment techniques to enable the quality control and guarantee the durability. In particular, an invisible microscopic damage detection technology is highly required because damages such as transverse cracks, debondings, or delaminations can lead to the critical failure of the structures. Among many non-destructive evaluation (NDE) methods for composite structures, fiber optic sensors are especially attractive due to the high sensitivity, the lightweight, and the small size. In the current trend of the structural health monitoring technology, fiber Bragg gratings (FBG) sensors are frequently used as strain or temperature sensors, and Brillouin scattering sensors are also often used for a long distance distributed measurement. The Brillouin distributed sensors can measure strain over a distance of 10km while a spatial resolution was limited to 1m. Some novel sensing method is proposed to improve the spatial resolution. The pulse-prepump Brillouin optical time domain analysis (PPP-BOTDA) is one of the latest distributed sensing applications with a cm-order high spatial resolution. The PPP-BOTDA commercial product has the spatial resolution of 10cm, and can measure the strain with a precision of ±25og. This precision, however, can be achieved by using conventional single-mode optical fibers. In our research, small-diameter optical fibers with a cladding diameter of 40om were embedded in the CFRP laminate to avoid the deterioration of the CFRP mechanical properties. Thus, in order to verify the performance of PPP-BOTDA, the distributed strain measurement was conducted with the small-diameter optical fibers embedded in the CFRP laminate.

Design of S-Box Based on the Discrete Chaos Synchronization Systems

2013 ◽  
Vol 373-375 ◽  
pp. 1874-1880
Author(s):  
Dan Dan Han ◽  
Hong Yan Zang ◽  
Le Quan Min
Keyword(s):  
Affine Transformation ◽  
Chaos Synchronization ◽  
Initial Condition ◽  
Generalized Synchronization ◽  
Synchronization System ◽  
Discrete Chaos ◽  
New System

Based on the theorem of generalized synchronization for discrete chaos systems, a new discrete chaos synchronization system was designed. Using the new system and the properties of sensitive dependent on initial condition, a novel S-box generation approach was proposed. An affine transformation was used to shuffle S-box. Testing the cryptographic properties shows that the S-box generated in the proposed algorithm has sound cryptographic performance.

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