Abstract

A carrier phase-shifted (CPS) double sideband (DSB) modulation technique in radio-over-fiber (RoF) system is proposed and experimentally demonstrated. By tuning the biases in a single-drive dual parallel Mach–Zehnder modulator (SD-DPMZM), the optical carrier in the DSB spectrum acquires additional phase shift. The transmittance response of a dispersive RoF link is thus being controlled and shifted in the frequency domain. Experiments successfully turned the maximum transmission frequency to 10GHz and 15GHz for both 25 and 39km fiber links. This is also a highly linear scheme, of which a spurious-free dynamic range (SFDR) of 111.3dB·Hz2/3 is experimentally obtained.

© 2011 Optical Society of America

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