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
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 - Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information

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

Domains: Optics [physics.optics]; Optics / Photonic

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⟩