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We present multi-joule-level energy extraction from Tm:YLF. The tabletop, diode-pumped system consists of a Tm:YLF oscillator followed by a 4-pass Tm:YLF amplifier, which produced 3.88J in 20ns pulses and up to 38.1J in long-pulse mode.

We report on the first multi-joule-level Tm:YLF amplifier. In this experimental setup, a Tm:YLF oscillator seeds a 4-pass diode-pumped Tm:YLF amplifier, producing output energies of 3.88J in 20ns and up to 38.1J in long-pulse operation.

We report on the generation of high energy, high power pulses in a tabletop diode-pumped Tm:YLF-based laser system, which delivers amplified pulse energies up to 108 J, as well as GW peak power performance when seeded with nanosecond duration pulses. Furthermore, the high power and efficiency capabilities of operating Tm:YLF in the multi-pulse extraction (MPE) regime were explored by seeding the experimental setup with a multi-kHz burst of pulses exhibiting a low individual pulse fluence, resulting in a 3.6 kW average power train of multi-joule-level pulses with an optical-to-optical efficiency of 19%.

We demonstrate optical parametric amplification using a spatially-homogenized pump beam for the first time and investigate the impact of pump beam angular content on OPA efficiency and bandwidth.