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Optics Letters

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  • Vol. 37, Iss. 13 — Jul. 1, 2012
  • pp: 2568–2570

Efficient high-power continuous wave Er:Lu2O3 laser at 2.85 μm

T. Li, K. Beil, C. Kränkel, and G. Huber  »View Author Affiliations


Optics Letters, Vol. 37, Issue 13, pp. 2568-2570 (2012)
http://dx.doi.org/10.1364/OL.37.002568


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Abstract

We report on crystal growth, spectroscopy, thermal conductivity and I11/24I13/24-laser performance of Er:Lu2O3. Pumping with an optically pumped semiconductor laser at 971 nm, 1.4 W of cw output power with a slope efficiency of 36% at 2.85 µm was obtained at room temperature. This exceeds the Stokes efficiency due to an upconversion process recycling population of the lower laser level back into the upper laser level, yielding the highest efficiency of any Er-sesquioxide laser around 3 µm. Under diode pumping, 5.9 W of output power with 27% of slope efficiency was achieved with an M2 of 1.2 to 1.4.

© 2012 Optical Society of America

OCIS Codes
(140.3380) Lasers and laser optics : Laser materials
(140.3500) Lasers and laser optics : Lasers, erbium
(140.3580) Lasers and laser optics : Lasers, solid-state

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: April 5, 2012
Manuscript Accepted: April 23, 2012
Published: June 21, 2012

Citation
T. Li, K. Beil, C. Kränkel, and G. Huber, "Efficient high-power continuous wave Er:Lu2O3laser at 2.85 μm," Opt. Lett. 37, 2568-2570 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-13-2568


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