Magic mode switching in Yb:CaGdAlO4 laser under high pump power

作者：Druon Frederic^*; Olivier Mickael; Jaffres Anael; Loiseau Pascal; Aubry Nicolas; DidierJean Julien; Balembois Francois; Viana Bruno; Georges Patrick

来源：Optics Letters, 2013, 38(20): 4138-4141.

DOI：10.1364/OL.38.004138

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 TEM00 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.

• 出版日期2013-10-15