A power-scaling strategy for longitudinally diode-pumped Tm:YLF lasers
- First Online:
- Cite this article as:
- So, S., Mackenzie, J., Shepherd, D. et al. Appl. Phys. B (2006) 84: 389. doi:10.1007/s00340-006-2286-y
- 267 Downloads
We describe a power-scaling strategy for longitudinally diode-pumped Tm:YLF lasers based on optimisation of the thulium doping level and the gain geometry. Carefully designed laser experiments at lower powers are shown to allow a simple means for accurately predicting the thermal loading and hence the power-scaling properties of this system, including the effects of ground-state depletion, cross relaxation and energy-transfer upconversion. An optimised doping level of 2 at. % and a slab geometry are shown experimentally to allow scaling of a single gain unit to output powers of ∼70 W, limited by the available pump power, and a strategy for scaling well beyond 100-W output is discussed.