A Hybrid Optical Fiber and FSO System for Bidirectional Communications Used in Bridges

作者：Yu Yi Lin^*; Liaw Shien Kuei; Chou Hsi Hsir; Le Minh Hoa; Ghassemlooy Zabih

来源：IEEE Photonics Journal, 2015, 7(6): 7905509.

DOI：10.1109/JPHOT.2015.2488286

• Free space optics
• erbium doped fiber amplifier
• fiber sensor
• long-haul transmission system

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.

• 出版日期2015-12