Acta Optica Sinica, Volume. 33, Issue 7, 706008(2013)
Optical Single Sideband Modulation Radio over Fiber System with Tunable Carrier-to-Sideband Ratio Based on Long Period Fiber Gratings
An optical single sideband modulation radio over fiber (RoF) system with tunable carrier-to-sideband ratio (CSR) based on long period fiber grating (LPFG) is presented. The system mainly consists of five polarization controllers (PC), a polarization beam splitter (PBS), two parallelized long period fiber gratings (LPFG), and a polarization beam combiner (PBC). By tuning the polarization controller placed in front of the polarization beam splitter, continuously tunable carrier-to-sideband ratio can be obtained. The impacts of modulation index, transmission peak value of LPFG, and extinction ratio of the Mach-Zehnder modulator on CSR are discussed. Simulated results for transmission over 40-km single mode fiber (SMF) show that the receiving sensitivity increases by 5.7 dB when CSR changes from 13.22 dB to 5.4 dB which matches well with theoretical analysis.
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You Haidong, Ning Tigang, Li Jing, Jian Wei, Wen Xiaodong, Chen Hongyao. Optical Single Sideband Modulation Radio over Fiber System with Tunable Carrier-to-Sideband Ratio Based on Long Period Fiber Gratings[J]. Acta Optica Sinica, 2013, 33(7): 706008
Category: Fiber Optics and Optical Communications
Received: Jan. 11, 2013
Accepted: --
Published Online: Jun. 7, 2013
The Author Email: Haidong You (11111006@bjtu.edu.cn)