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I have demonstrated a novel scheme to generate orthogonal frequency division multiplexing signals for radio over fiber systems using a fiber bragg grating and a direct-modulation laser. I employ the FBG because the bandwidth of the optical modulator is largely reduced and the architecture of the ROF system is simpler. Because no expensive broadband external modulator is used, the overall system is considered as a cost-effective solution. The simple structure and low cost of the DD-OFDM system is attractive for the future cost-effective systems.

A Cost-effective DD-OFDM ROF System Employing FBG and DML to Generate Optical mm-Wave