[20a-B301-1~11] 3.6 Ultrashort-pulse and high-intensity lasers

△ [20a-B301-1] Generation of sub-2-cycle, CEP-stable, intense MIR pulses by multiple-plate pulse compression

〇Peiyu Xia¹, Faming Lu¹, Nobuhisa Ishii¹, Teruto Kanai¹, Jiro Itatani¹ (1.Inst. for Solid State Phys., The Univ. of Tokyo)

Keywords:pulse compression, mid-infrared pulse, optical parametric amplifier

We demonstrate multiple-plate compression of mid-infrared multi-cycle pulses (3.5 μm, 120 μJ, 120 fs) generated from an optical parametric amplifier. We found empirically that a combination of 2 mm AR-coated Si, 2 mm YAG and 1 mm AR-coated Si plates efficiently broadens the spectrum of the femtosecond MIR pulses. 21 fs pulse duration (1.8-optical-cycle) is achieved by subsequent chirp-compensation by a pair of CaF₂ wedges.