A High Speed Radio on Fiber Based on Optical Double-Sidebands via Optical Filter and Optical Phase Modulation

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Abstract:

We demonstrate a system scheme of generating and transmitting base-band and radio frequency signal based on optical double-sidebands scheme to generate optical millimeter-wave signal via optical phase modulation (OPM) and FBG. The system architecture with the source of laser at central station, the data re-modulation on downlink optical carrier gained from one base station is a good method to reduce the cost of uplink transmitter, for it does not needs the source of laser and wavelength administration at the base station. The optical phase modulator is inexpensive and mature. The downlink communicated bandwidth can be doubled to realize Ultra Width Band & Ultra High Frequency (UHF) communication via phase modulation and FBG at the base station. And the other signal which is reflected by FBG can be reused as uplink via amplitude modulation availably. The simulation results show that the bi-directional 2.5Gbit/s data and UHF microwave with 24GHz is successfully transmitted over 50km distance of a single-mode optical fiber with a optical dispersion of 20ps/(nm·km), an optical attenuation of 0.25dB/km and a light source power of 3dBm.

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636-639

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July 2014

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