title: GaP waveguide emitters for high power broadband THz generation pumped by Yb-doped fiber lasers.
abstract: We demonstrate the generation of broadband THz pulses by optical rectification in GaP waveguides pumped by high power Yb-doped fiber amplifiers. The dispersion of the GaP emitter can be controlled via the geometry of the waveguide; the peak frequency of the emitted THz radiation is tuned by varying the waveguide cross-section. Most importantly, the use of a waveguide for the THz emission increases the coherent buildup length of the THz pulses and offers scalability to higher power; this was investigated by pumping a GaP waveguide emitter with a high power Yb-doped fiber laser system. A 25-MHz-repetition-rate pulse train of THz radiation with 120 muW average power was achieved using 14 W optical power, which represents the highest average power for a broadband THz source pumped by fiber lasers to date.
authors: Guoqing
authors: G
authors: Chang
authors: Charles J
authors: CJ
authors: Divin
authors: Jun
authors: J
authors: Yang
authors: Malakeh A
authors: MA
authors: Musheinish
authors: Steven L
authors: SL
authors: Williamson
authors: Almantas
authors: A
authors: Galvanauskas
authors: Theodore B
authors: TB
authors: Norris