A high-quality gadolinium vanadate (GdVO4) crystal with 7-at. % thulium as the starting material was grown by the Czochralski technique. The measured absorption spectra exhibited sufficient absorption coefficients for laser diodes (LDs) for neodymium laser pumping: 6.0 cm−1 for π polarization and 6.2 cm−1 for σ polarization at 808 nm. Laser oscillation was carried out with single-stripe 808-nm LDs in an end-pumping configuration. A slope efficiency of 28% and a threshold of 750 mW were exhibited with respect to the absorbed pump power. An output power of 420 mW was achieved at an absorbed power of 2.4 W. It was demonstrated that Tm:GdVO4 is a useful material for 2-µm lasers, particularly in a compact LD-pumped system.
© 2005 Optical Society of America
Original Manuscript: July 1, 2004
Revised Manuscript: November 1, 2004
Manuscript Accepted: November 6, 2004
Published: May 20, 2005
Yoshiharu Urata and Satoshi Wada, "808-nm diode-pumped continuous-wave Tm:GdVO4 laser at room temperature," Appl. Opt. 44, 3087-3092 (2005)