Suzuki Anna, Kalusniak Sascha, Ganschow Steffen, Kränkel Christian, Tokurakawa Masaki
Opt Lett. 2023 Aug 15;48(16):4221-4224. doi: 10.1364/OL.497847.
We report on a continuous wave (CW) and Kerr-lens mode-locked (KLM) Tm:YScO single-crystal laser centered at 2.1 µm. Efficient CW laser operation with a maximum slope efficiency of 51% was achieved under in-band pumping by an Er:Yb fiber master oscillator power amplifier (MOPA). In KLM operation, pulses as short as 49 fs corresponding to seven optical cycles were achieved at a repetition rate of 96.7 MHz with an average output power of 126 mW. Such short pulse durations are enabled by the inhomogeneously broadened emission spectrum of Tm:YScO extending to above 2200 nm.
