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Frontiers of Optoelectronics

Front Optoelec Chin    2009, Vol. 2 Issue (4) : 368-378     DOI: 10.1007/s12200-009-0026-8
RESEARCH ARTICLE |
New progress of mm-wave radio-over-fiber system based on OFM
Rujian LIN(), Meiwei ZHU, Zheyun ZHOU, Haoshuo CHEN, Jiajun YE
Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Shanghai University, Shanghai 200072, China
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Abstract

This paper presents an overview on new progresses of millimeter wave (mm-wave) radio-over-fiber (RoF) system based on mm-wave generation by optical frequency multiplication (OFM), including generation of high-order optical side modes by optical modulation using dual-drive Mach-Zehnder modulator (DD-MZM) and enhancement of high-order optical side mode induced by selective amplification due to stimulated Brillouin scattering (SBS). The paper describes OFM by using DD-MZM in principle and verifies it in an experimental bidirectional 40 GHz RoF system. SBS amplification enhances the generated information-bearing mm-wave in downlink and also helps in producing a pure reference mm-wave for radio frequency-intermediate frequency (RF-IF) down-conversion in uplink. These efforts pushed the OFM technology of mm-RoF systems to achieve more and more feasibility and cost-effectiveness.

Keywords networks      optical communications      radio-over-fiber (RoF) system      optical frequency multiplication (OFM)      Mach-Zehnder modulator (MZM)      self-heterodyne      stimulated Brillouin scattering (SBS)      free spectrum range (FSR)      millimeter wave (mm-wave)     
Corresponding Authors: LIN Rujian,Email:rujianlin@vip.sina.com   
Issue Date: 05 December 2009
 Cite this article:   
Rujian LIN,Meiwei ZHU,Zheyun ZHOU, et al. New progress of mm-wave radio-over-fiber system based on OFM[J]. Front Optoelec Chin, 2009, 2(4): 368-378.
 URL:  
http://journal.hep.com.cn/foe/EN/10.1007/s12200-009-0026-8
http://journal.hep.com.cn/foe/EN/Y2009/V2/I4/368
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Rujian LIN
Meiwei ZHU
Zheyun ZHOU
Haoshuo CHEN
Jiajun YE
Fig.1  RF-driven DD-MZM
Fig.2  Basic configuration of OFM
Fig.3  Light wave spectrum after phase modulation
Fig.4  Light wave spectrum after phase-intensity conversion
Fig.5  Photocurrent spectrum after self-heterodyning
Fig.6  Bidirectional 38/40 GHz RoF system based on OFM using dual-electrode MZM (demod: demodulator; pre-amp: pre-amplifier)
Fig.7  Optical spectrum for single arm of MZM driven by+24 dBm
Fig.8  Optical spectrum for single arm of MZM driven by+27 dBm
Fig.9  Optical spectrum for dual arms of MZM driven by+27 dBm
Fig.10  Spectrum of PD output at point C
Fig.11  Spectrum of receiver output at point D
Fig.12  Spectrum of 38 GHz BPSK at point D
Fig.13  Spectrum of 40 GHz signal at point E
Fig.14  Spectrum of 2 GHz BPSK at point I
Fig.15  Waveform of output 100 Mbps data
Fig.16  Diagram of modulation scheme (PC: polarization controller)
Fig.17  Stokes spectrum of SBS over optical sideband
Fig.18  RF spectrum of photocurrent
Fig.19  Curves of Bessel functions
Fig.20  Bidirectional RoF system setup
Fig.21  Optical signal spectrum with the 7 th side mode SBS-amplified
Fig.22  Spectrum of generated mm-wave by OFM
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