Bidirectional Hybrid Optical Communication System Based on Wavelength Division Multiplexing for Outdoor Applications

Abstract

The simulation and investigation of a 32×10 Gb/s WDM all–optical bidirectional hybrid communication system for outdoor applications is presented in this article via multidisciplinary softwares. In order to track the system condition, a strain sensor based on fiber Bragg grating (FBG) is integrated in–line with the fiber optic link (FO–link). Then, a free space optical link (FSO–link) with 4–channel is simulated to act backup or rescue to the FO–link in the event of disaster or bombing. The FO–link is working well until the strain reach to 180 µε, after that the FO–link has degraded. Therefore, an optical switch is incorporated in between these systems (FO–link & FSO–link) to turn–on the FSO–link which act as a backup system to FO–link and maintains the continuity of the data transmission. According to the hybrid link results, there is an efficient enhancement in the Q–factor as compared with the FO–link even when there is heavy rain.

Secure Optical Communication Using a New 5D Chaotic Stream Segmentation

“…Encryption method based on some emerging techniques such as chaotic systems is one of the essential resources to ensure the protection of such documents. Most of the previous strategies were based on optical code [6][7][8][9] until a chaotic laser emerged that plays an important role in enhancing the security of optical communication [10][11][12][13]. In chaotic communication, the carrier is used to embed the message before sending it to the receiver side.…”

Multi-channel chaos synchronization based on two asymmetric mutually coupled WRC-FPLDs

“…Most previous studies on chaotic communication are limited to one-to-one communication with one pair of chaotic lasers [2][3][4][5][6][7] , which can not meet the development demand of future secure communications. Hence, multi-access optical chaos communication systems based on wavelength division multiplexing (WDM) have been proposed [8][9][10][11][12][13][14][15][16][17][18][19] . For example, Matsuura et al have demonstrated experimentally and numerically WDM with chaotic waveforms as subcarriers in two pairs of one-way-coupled Nd: YVO4 microchip lasers 8 .…”