抄録
High-energy infrared (IR) femtosecond laser sources are important for applications in ultrafast and
strong-field laser science; thus, considerable effort has recently been made to develop such laser systems.
In this paper, we review our recent work on developing TW-class high power mid-infrared (MIR)
few-cycle lasers in the 1 ~ 4 μm region using a dual-chirped optical parametric amplification (DC-OPA)
method. By employing a Ti:sapphire laser with joule energy to pump the DC-OPA system, MIR femtosecond
pulses with 100-mJ-class energy are demonstrated. High conversion efficiency, high energy scalability,
and wide wavelength tunability in DC-OPA are confirmed experimentally. By precisely optimizing
the chirps of the seed and pump pulses in the DC-OPA system, gain narrowing of amplified pulses
can be suppressed.
