Magic mode switching in Yb:CaGdAlO sub(4) laser under high pump power

We present unique spatial-mode switching in a cw Yb:CALGO laser when pumped at a multihundred-watts power level. It permits us to automatically stabilize to a TEM sub(00) mode from a highly spatial multimode regime. This stabilization is achievable thanks to polarization-mode switching allowed by th...

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Bibliographic Details
Published in:Optics letters 2013-01, Vol.38 (20), p.4138-4141
Main Authors: Druon, Frederic, Olivier, Mickael, Jaffres, Anael, Loiseau, Pascal, Aubry, Nicolas, DidierJean, Julien, Balembois, Francois, Viana, Bruno, Georges, Patrick
Format: Article
Language:English
Subjects:
Crystals
Lasers
Pumps
Spectroscopy
Stabilization
Switching
Thermal properties
Online Access:Get full text
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Summary:We present unique spatial-mode switching in a cw Yb:CALGO laser when pumped at a multihundred-watts power level. It permits us to automatically stabilize to a TEM sub(00) mode from a highly spatial multimode regime. This stabilization is achievable thanks to polarization-mode switching allowed by the particular spectroscopic and thermal properties of Yb:CALGO crystal. This atypical and unexpected behavior is studied in detail in this Letter and explained by analysis of the thermo-optical coefficients for CALGO.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.38.004138