2 µm microchip laser based on Tm:YAG composite under 0.8 µm and 1.7 µm pumping

Jan Kratochvíl; Jan Šulc; Helena Jelínková; Karel Nejezchleb; Štěpán Uxa; Miroslav Čech; Veronika Čírtková

doi:10.1117/12.2609302

4 March 2022 2 μm microchip laser based on Tm:YAG composite under 0.8 µm and 1.7 μm pumping

Jan Kratochvíl, Jan Šulc, Helena Jelínková, Karel Nejezchleb, Štěpán Uxa, Miroslav Čech, Veronika Čírtková

Proceedings Volume 11980, Solid State Lasers XXXI: Technology and Devices; 119800F (2022) https://doi.org/10.1117/12.2609302
Event: SPIE LASE, 2022, San Francisco, California, United States

Conference Poster

Abstract

Composite Tm3+-doped Tm:Y3Al5O12, (Tm:YAG) microchip lasers were investigated. Effect of bonding the microchip rod with undoped YAG cap at one (YAG/Tm:YAG) and two (YAG/Tm:YAG/YAG) ends was studied and the results were compared to an unbonded Tm:YAG sample. The experiments were performed under 785 nm and 1700 nm diode pumping. The microchip rods had 3 mm diameter and 5/9/13 mm length. Faces were planar, polished and coated for HT at 1685 nm and 785 nm and HR at 1900–2050 nm at pumping end. Output coupler reflectivity value was R=98 The composite microchip lasers had advantageously high beam quality. At the maximum pumping power, the M2 parameter, measured by the knife-edge method, was M2=5.8 for the non-composite sample, which reduced to M2=4.5 for single-bonded and to M2=2.2 for double-bonded sample. There was a 30 End caps did not significantly influence output power or efficiency. The best obtained slope efficiency with respect to the absorbed power was 54.

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Jan Kratochvíl, Jan Šulc, Helena Jelínková, Karel Nejezchleb, Štěpán Uxa, Miroslav Čech, and Veronika Čírtková "2 μm microchip laser based on Tm:YAG composite under 0.8 µm and 1.7 μm pumping", Proc. SPIE 11980, Solid State Lasers XXXI: Technology and Devices, 119800F (4 March 2022); https://doi.org/10.1117/12.2609302

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