PHOTONIC GENERATION OF TUNABLE MICROWAVE SIGNAL USING A PASSIVELY Q-SWITCHED DUAL-WAVELENGTH FIBER LASER

摘要

A novel photonic tunable microwave generation based on a dual-wavelength Q-switched Er-doped fiber laser is proposed and experimental demonstrated. In the proposed configuration, two cascaded fiber Bragg gratings (FBG) are used as a cavity mirror, and a semiconductor saturable absorber mirror as another one. By changing the operation temperature of the FBG, stable dual-wavelength Q-switched pulses with tunable wavelength spacing are achieved, and wavelength spacing of 0.24-0.66 nm, corresponding to microwave signals of 30-82.5 GHz can be obtained. (c) 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:166-168, 2015