Abstract
An optically tunable optoelectronic oscillator (OEO) implemented by
employing a two-port optical phase modulator without using any electronic
microwave filters is proposed and experimentally demonstrated. The key
device in the system is the two-port phase modulator, which functions, in
conjunction with a dispersive element in the loop, to form a high-Q
microwave filter to perform microwave frequency selection. The central
frequency of the microwave filter is a function of the optical wavelength
and the chromatic dispersion of the dispersive element, therefore, the
oscillation frequency can be simply tuned by tuning the wavelength of the
laser source or the chromatic dispersion of the dispersive element. A
theoretical analysis is provided, which is verified by experiments. The
phase noise performance and the frequency tunability are both experimentally
investigated.
© 2010 IEEE
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