Title :
A Hybrid Optical Fiber and FSO System for Bidirectional Communications Used in Bridges
Author :
Yi-Lin Yu ; Shien-Kuei Liaw ; Hsi-Hsir Chou ; Hoa Le-Minh ; Ghassemlooy, Zabih
Author_Institution :
Dept. of Electron. & Comput. Eng., Nat. Taiwan Univ. of Sci. & Technol., Taipei, Taiwan
Abstract :
In this paper, a 10-Gb/s hybrid optical fiber (OF) and free-space optics (FSO) link as part of a bidirectional long-haul OF transmission for application in outdoor environments such as bridges is proposed. A fiber-Bragg-grating (FBG) sensor head is used for monitoring the condition of a bridge, and in the case of the bridge being damaged, the transmission path is changed over from OF to the FSO link to ensure link connectivity. An Erbium-doped fiber amplifier is used to compensate for losses due to the fiber cable and the free-space channel. At a bit error rate (BER) of 10e-9, the power penalty between the OF and FSO paths is <; 1 dB, and the power variations for both paths are ±0.07 and ±0.12 dB, respectively.
Keywords :
Bragg gratings; bridges (structures); erbium; error statistics; fibre optic sensors; free-space optical communication; optical fibre amplifiers; optical fibre communication; FSO system; bidirectional communications; bidirectional long-haul OF transmission; bit error rate; bit rate 10 Gbit/s; bridges; erbium-doped fiber amplifier; fiber-Bragg-grating sensor head; free-space optics link; hybrid optical fiber; link connectivity; outdoor environments; Bridges; Collimators; Fiber gratings; Optical fiber sensors; Optical fibers; Optical switches; Erbium doped fiber amplifer; Fiber sensor; Free space optics; Long-haul transmission system; erbium doped fiber amplifier; fiber sensor; long-haul transmission system;
Journal_Title :
Photonics Journal, IEEE
DOI :
10.1109/JPHOT.2015.2488286
