A simple approach to generate two bands of tunable microwave signal is proposed and demonstrated. In this scheme, two single-mode fibers with optimized Brillouin frequency shift spacing have been chosen as the scattering medium in two cascaded ring cavities. Two bands of tunable microwave signal from 390 to 453 MHz and 10.863 to 11.076 GHz can be obtained through adjusting the temperature of the fiber and the pump wavelength. The tunable frequency range can be further expanded by using a temperature controller with a wider adjustment range. The generated microwave signal exhibits high stability on frequency.
© 2012 Optical Society of America
(190.2640) Nonlinear optics : Stimulated scattering, modulation, etc.
(290.5830) Scattering : Scattering, Brillouin
(060.2840) Fiber optics and optical communications : Heterodyne
(060.3510) Fiber optics and optical communications : Lasers, fiber
Fiber Optics and Optical Communications
Original Manuscript: September 26, 2011
Revised Manuscript: December 26, 2011
Manuscript Accepted: January 1, 2012
Published: March 5, 2012
Rugang Wang, Xuping Zhang, Junhui Hu, and Guanghui Wang, "Photonic generation of tunable microwave signal using Brillouin fiber laser," Appl. Opt. 51, 1028-1032 (2012)