Abstract
We analyze in theory, simulation, and experiment the spurious-free dynamic
range (SFDR) for a radio-over-fiber system using an optical single sideband
(OSSB) Mach–Zehnder modulator (MZM) that is linearized using mixed
polarization. The mixed polarization OSSB MZM makes use of a dual-electrode ${ z}$-cut ${\rm LiNbO}_{3}$ MZM, where a linear polarizer is placed in front and in behind
the optical modulator, respectively. It is found that intermodulation
distortion can be suppressed significantly regardless of modulation index.
Thus intermodulation induced power fading and crosstalk via fiber chromatic
dispersion for a given RF carrier is reduced compared to using the
conventional OSSB MZM. Improvements of $\sim {13}\,{\rm dB}$ in SDFR is predicted in theory, simulation, and demonstrated
experimentally.
© 2009 IEEE
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