Abstract
We present an infrared source operating at 1937 nm center wavelength capable of generating 1.35 mJ pulse energies with 1 kHz repetition rate and 2 GW peak power based on a diode-pumped Tm:YAP regenerative amplifier. The obtained pulses after 45 round trips have been compressed down to 360 fs. Using only a small portion (15 μJ) of the output of the system we managed to generate a white light continuum in a 3 mm YAG window that exhibits the viability of the system as a suitable candidate for a pumping source of a mid-infrared optical parametric amplifier.
Highlights
Intense ultrashort infrared (IR) pulses play a pivotal role in many of the current research fields and applications
Powerful femtosecond pulses in the vicinity of 2 μm are highly desired for coherent mid-infrared (MIR) [1,2,3,4,5] or terahertz (THz) pulse generation [6], high harmonic generation reaching soft x-ray in water-window [7,8,9], and atmospheric sensing [10]
In this work we present a new scheme that solely based on Thulium-doped YAlO3 (Tm):YAP takes the capability of such lasers to 2 GW peak power after compression, using a ring cavity regenerative amplifier design
Summary
Intense ultrashort infrared (IR) pulses play a pivotal role in many of the current research fields and applications. OPA in general has complicated design due to the requirements of the precise synchronization between the pump and seed pulses while a very high intensity pump pulse is required for triggering the parametric amplification. This fact attracts a lot of attentions to the development of solid-state lasers, directly generating high energy ultrashort pulses around 2 μm, such as Tm:YAP, Ho:YAG, Ho:YLF, or Cr:ZnSe [17,18,19,20,21,22]. Regenerative or multi-pass amplifiers based on these materials can scale up nJ pulses directly to mJ energy levels while each material has its own advantages and disadvantages
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