A Yb3+:Ca4GdO(BO3)3 (Yb:GdCOB) crystal has been diode pumped for the first time to our knowledge. We obtained 47.5% slope efficiency at 6 °C, producing 191 mW of power at 1050 nm, with a 2.4% output coupler. Temperature does not significantly affect the laser performance: At room temperature we still obtained 180 mW of power for the same cavity. We achieved tunability of the Yb:GdCOB laser from 1035 to 1088 nm with a 1.7% output coupler and 100-nm tunability with a low-transmission output coupling (T = 0.03%).
© 1999 Optical Society of America
Original Manuscript: August 25, 1998
Revised Manuscript: November 20, 1998
Published: February 20, 1999
Frederika Augé, François Balembois, Patrick Georges, Alain Brun, Frédéric Mougel, Gérard Aka, Andrée Kahn-Harari, and Daniel Vivien, "Efficient and tunable continuous-wave diode-pumped Yb3+:Ca4GdO(BO3)3 laser," Appl. Opt. 38, 976-979 (1999)