Broadband mid infrared pulses from potassium titanyl arsenate/zinc germanium phosphate optical parametric amplifier pumped by Tm, Ho fiber seeded Ho:YAG chirped pulse amplifier.
We present a concept of a white light seeded cascaded mid infrared (mid IR) optical parametric amplifier (OPA) based on potassium titanyl arsenate and zinc germanium phosphate nonlinear optical crystals and producing 100 mJ level pulses centered at 5300 nm, with the spectrum supporting four optical cycle pulse duration. The OPA is pumped by 2090 nm master oscillator/power amplifier based on a Tm,Ho fiber laser seeder and a Ho:YAG regenerative amplifier delivering 3.8 mJ sub ps pulses at a repetition rate of 1 kHz. We validate that output parameters of the OPA are scalable by means of increasing the pulse energy, decreasing the pulse duration and redshifting the central wavelength.
Optics letters