Diode-pumped actively Q-switched thulium laser

J. K. Jabczynski; W. Zendzian; J. Kwiatkowski; H. Jelinkova; J. Sulc; M. Nemec

doi:10.1117/12.752870

23 August 2007 Diode-pumped actively Q-switched thulium laser

J. K. Jabczynski, W. Zendzian, J. Kwiatkowski, H. Jelinkova, J. Sulc, M. Nemec

Proceedings Volume 6731, International Conference on Lasers, Applications, and Technologies 2007: Advanced Lasers and Systems; 673114 (2007) https://doi.org/10.1117/12.752870
Event: International Conference on Lasers, Applications, and Technologies '07, 2007, Minsk, Belarus

Abstract

The properties of several Tm doped crystals regarding application in Q-switched tunable laser were analyzed theoretically. The acousto-optically Q-switched Tm:YLF laser is described in experimental part. The fiber coupled (0.4-mm core diameter) laser diode bar at 792-nm wavelength was deployed for pumping. The uncoated, with 3.5% dopant of thulium YLF rod of &slasho;3x8mm size wrapped with indium foil was mounted in copper heat-sink maintaining 293 K temperature of coolant water. Above 6 W of output power and near 50% slope efficiency with respect to absorbed pump power was demonstrated in free-running mode for a short, 40-mm long resonator. The quartz acousto-optic modulator with above 80% diffraction efficiency for 25-W power of RF was taken as the Q-switch for such a laser. In the best case of Q-switching mode up to 2-mJ output energy with 15-ns pulse duration corresponding to 100-kW peak power was demonstrated for rep. rate of a few Hz. Emission wavelength was around 1904 nm for both free-running and Q-switching regimes

Citation Download Citation

J. K. Jabczynski, W. Zendzian, J. Kwiatkowski, H. Jelinkova, J. Sulc, and M. Nemec "Diode-pumped actively Q-switched thulium laser", Proc. SPIE 6731, International Conference on Lasers, Applications, and Technologies 2007: Advanced Lasers and Systems, 673114 (23 August 2007); https://doi.org/10.1117/12.752870

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KEYWORDS

Semiconductor lasers

Thulium

Absorption

Q switched lasers

Diodes

Crystals

Fiber coupled lasers

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