Broadband Terahertz Pulses Generated by a Compact Femtosecond Photonic Crystal Fiber Amplifier

We demonstrate a scalable, compact, high-power, and broadband terahertz (THz) source based on a cutting-edge large-mode-area photonic-crystal-fiber amplifier system. A 3-mm (110)-cut bulk GaP crystal was used as the THz emitter based on an optical rectification technique. Systematic optimization of the operation parameters allowed a THz output up to 150 μW to be achieved with an input laser power of 12 W in the GaP crystal.