Diode radial pumped composite microchip Yb:YAG laser: output performances and thermal effects

Traian Dascalu; Nicolaie A. Pavel; Takunori Taira

doi:10.1117/12.582785

21 October 2004 Diode radial pumped composite microchip Yb:YAG laser: output performances and thermal effects

Traian Dascalu, Nicolaie A. Pavel, Takunori Taira

Proceedings Volume 5581, ROMOPTO 2003: Seventh Conference on Optics; (2004) https://doi.org/10.1117/12.582785
Event: ROMOPTO 2003: Seventh Conference on Optics, 2003, Constanta, Romania

Abstract

A diode radial pumped microchip Yb:YAG laser that consists of a Yb-doped core surrounded by undoped YAG of slab shape is presented. Quasi-continuous wave pumping of an 800-μm thick 10-at.% Yb doped core of 2 x 2 mm² square shape with pulses of 5-Hz repetition rate and 2.5% duty cycle delivers 66-W output peak power at 220-W input pump power with 49% slope efficiency. 112-W peak power with 63% slope efficiency and 38% optical-to-optical efficiency, were obtained from a of 1.2 x 1.2 mm² square 15-at.% Yb:YAG core of 800-μm thickness. Continuous-wave operation with up to 90 W were obtained from a 400-μm thick Yb:YAG/YAG structure with a 10-at.% Yb:YAG square core of 2x2-mm² area; the slope efficiency and optical-to-optical efficiency with respect to the pump power were 40% and 28%, respectively. Measurements of the optical phase distortions induced by pumping gives focus shift bellow 0.05 m and shows the absence of astigmatic effects, indicating the axial heat flow in this pumping configuration.

Citation Download Citation

Traian Dascalu, Nicolaie A. Pavel, and Takunori Taira "Diode radial pumped composite microchip Yb:YAG laser: output performances and thermal effects", Proc. SPIE 5581, ROMOPTO 2003: Seventh Conference on Optics, (21 October 2004); https://doi.org/10.1117/12.582785

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