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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/3663

Title: Compact fibre-laser-pumped Ho:YLF oscillator-amplifier system
Authors: Bollig, C
Strauss, HJ
Esser, MJD
Koen, W
Schellhorn, M
Preussler, D
Nyangaza, K
Jacobs, C
Bernhardi, EH
Botha, LR
Keywords: Fibre-laser-pumped
Oscillator-amplifier system
Ho:YLF
Lasers and electro-optics
Quantum electronics
Conference on Lasers and Electro-Optics (CLEO) and Quantum Electronics and Laser Science
CLEO/IQEC
Issue Date: Jun-2009
Publisher: IEEE
Citation: Bollig, C, Strauss, HJ and Esser, MJD. 2009. Compact fibre-laser-pumped Ho:YLF oscillator-amplifier system. Conference on Lasers and Electro-Optics (CLEO) and Quantum Electronics and Laser Science Conference (QELS), Munich, Germany, 14-19 June 2009, pp 1
Abstract: Ho:YLF is an attractive laser material for 2 µm high energy sources since it has a much longer upper laser level lifetime (~14 ms) and higher emission cross section than Ho:YAG. In addition, the very weak thermal lens on the polarisation helps to deliver diffraction limited beams even under intense end-pumping. However, Ho:YLF has a somewhat stronger quasi-three-level nature, which implies that in order to reach transparency at the 2065 nm line, 22% of the Ho ions need to be pumped into the upper laser level (at room temperature), but it already reaches transparency at the 1940 nm pump wavelength with only 56% of the Ho ions in the upper laser level. In addition, the pump absorption cross section at 1940 nm is relatively low and strongly polarised.
Description: Copyright: 2009 IEEE
URI: http://hdl.handle.net/10204/3663
ISBN: 978-1-4244-4080-1
Appears in Collections:Laser physics and technology
General science, engineering & technology

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