[25a-D316-1~10] 3.6 Ultrashort-pulse and high-intensity lasers

[25a-D316-1] Development of a CEP-stable OPA around 2 μm with high repetition rate and high average power

〇Takayuki Kurihara¹, Tianqi Yang¹, Tomoya Mizuno¹, Teruto Kanai¹, Jiro Itatani¹ (1.ISSP, Univ. Tokyo)

Keywords:optical parametric amplifier, mid-infrared light generation, femtosecond laser

Targetting at next-generation high-harmonics driver sources, we develop an OPA system delivering few-cycle mid-infrared pulses in the 2 μm spectral region. The system is pumped by a commercial Yb:KGW laser system delivering 0.4 mJ pulse energy, pulse duration of 300 fs and a repetition rate as high as 100 kHz. In-line intrapulse difference frequency generation and subsequent OPA stages results in a broadband emission covering 1.8-2.5 μm, maximum pulse energy of 30 μJ, and compressed pulse duration of 22 fs.