A special-velocity-matched electro-optic (EO) phase modulator employing a microwave resonant design in lithium niobate is presented. Both the microwave property and phase-modulation performances of the 3.25-GHz modulator agree well with the numerical simulations. Using this modulator in a single-pass configuration with 1-kW microwave drive power, the spectral bandwidth of a 1 053-nm, 3-ns pulse-length laser is broadened to 0.13 nm. With a clear aperture of 5×5 (mm), the modulator is suited for two-dimensional smoothing by spectral dispersion in high power laser systems.
© 2013 Chinese Optics Letters
(140.3580) Lasers and laser optics : Lasers, solid-state
(160.3730) Materials : Lithium niobate
(230.2090) Optical devices : Electro-optical devices
(230.4110) Optical devices : Modulators
(350.4010) Other areas of optics : Microwaves
Youen Jiang, Xuechun Li, Shenlei Zhou, Wei Fan, and Zunqi Lin, "Microwave resonant electro-optic bulk phase modulator for two-dimensional smoothing by spectral dispersion in SG-II," Chin. Opt. Lett. 11, 052301- (2013)