Keywords:mid-infrared, high-energy, parametric amplification
Development of high-energy infrared (IR) fs pulses currently have become important for strong-field laser sciences.To break a bottleneck of energy scaling in the standard optical parametric amplification (OPA) scheme, we have proposed and demonstrated a dual chirped optical parametric amplification (DC-OPA) method. For the first time in literatures, we have obtained fs pulses with100-mJ-class energy and multi-TW peak power in 1-2 μm region by DC-OPA. Moreover, DC-OPA is capable to generate high-energy mid-infrared (MIR) and far-infrared (FIR) fs pulses. In this work, we experimentally obtained 31 mJ pulses in the MIR wavelength region at 3.3 μm. The pulse duration was compressed to 70 fs which consists of 6.4 optical cycles. In the next work, we will increase its peak power to TW-class by shorten the pulse duration to two-cycles and by further increasing its pulse energy.