We describe and demonstrate a novel technique for continuously tuning the frequency of a dual-loop-configuration optoelectronic rf oscillator. The rf tunability is obtained from a tunable diode laser and dispersive optical fibers. Results are presented for three ranges of frequency, centered at 550 MHz, 3 GHz, and 9 GHz. The frequency can be tuned electrically with constant rf power within a range of 0.1–1.9 MHz, depending on the center oscillation frequency. The tuning range can be increased eightfold through the use of highly dispersive fibers.
© 2002 Optical Society of America
(060.2310) Fiber optics and optical communications : Fiber optics
(140.3600) Lasers and laser optics : Lasers, tunable
(230.4110) Optical devices : Modulators
(260.2030) Physical optics : Dispersion
(350.4010) Other areas of optics : Microwaves
Stéphane Poinsot, Henri Porte, Jean-Pierre Goedgebuer, William T. Rhodes, and Bertrand Boussert, "Continuous radio-frequency tuning of an optoelectronic oscillator with dispersive feedback," Opt. Lett. 27, 1300-1302 (2002)