Diode pumping of Nd:ASL and its frequency doubling for blue emission around 450 nm

David Pabœuf 1 Gaëlle Lucas-Leclin 1 Patrick Georges 1 Bernd Sumpf 2 Götz Erbert 2 Cyrille Varona 3 Pascal Loiseau 3 Gérard Aka 3 Bernard Ferrand 4
1 Laboratoire Charles Fabry de l'Institut d'Optique / Elsa
LCFIO - Laboratoire Charles Fabry de l'Institut d'Optique
2 FBH - Ferdinand-Braun-Institut für Höchtstfrequenztechnik
3 LCMCP (site Paris VI) - Laboratoire de Chimie de la Matière Condensée de Paris (site Paris VI)
4 CEA-LETI - Laboratoire d'Electronique et des Technologies de l'Information
Abstract : We present the diode pumping of a Nd-doped strontium and lanthanum (Nd:ASL) crystal Sr1-xLax-yNdyMgxAl12-xO19 (0.05 ≤ x ≤ 0.5; y = 0.05) for second harmonic generation around 450 nm. In order to fulfill the pumping requirements of this crystal, we have developed a high-brightness pump source based on a tapered amplifier in an extended cavity with a volume Bragg grating for wavelength stabilization. A pump brightness of 110 MW.cm-2sr-1 has been obtained with a linewidth lower than 80 pm at 798 nm. This laser source has been used to pump a Nd:ASL crystal to obtain 300 mW at 906 nm and 53 mW at 453 nm by intracavity doubling with a LBO crystal.
Keywords : Diode pumped solid-state lasers Rare earth Second harmonic generation Neodymium Volume holographic grating
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David Pabœuf, Gaëlle Lucas-Leclin, Patrick Georges, Bernd Sumpf, Götz Erbert, et al.. Diode pumping of Nd:ASL and its frequency doubling for blue emission around 450 nm. Photonics West - LASE 2008, Jan 2008, San Jose, United States. pp.87112, ⟨10.1117/12.769125⟩. ⟨hal-00531355⟩

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