Abstract
We theoretically and experimentally demonstrate a novel broadband phase-to-intensity
modulation conversion technique for microwave photonics processing system.
The technique is based on optical carrier phase shift of a phase modulated
signal using stimulated Brillouin scattering. More than 360$^{\circ}$ carrier phase shift can be
achieved. By simply adjusting the carrier phase shift while preserving its
amplitude unchanged, the phase modulation can be fully or partially converted
to intensity modulation. The main advantage of the proposed method lies in
its broadband nature since the SBS is only imparted on the optical carrier
and the phase modulated sidebands are not affected as long as the modulating
frequency is higher than the Brillouin bandwidth. In addition, as a microwave
photonics processing application, we demonstrate the dispersion induced power
penalty control in radio-over-fiber systems using the proposed technique.
Experimental results match well with the theoretical prediction.
© 2011 IEEE
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