We describe a new design for chromium-doped forsterite lasers based on near-IR (700–800-nm) pumping of a thin (3-mm) crystal. In contrast with pumping at 1.06 μm, near-IR pumping permits the use of shorter crystal lengths, which enable one to develop compact and diode-pumped laser geometries. Near-IR pumping also results in an increased effective figure of merit and tuning performance. Using a Ti:Al2O3 pump laser, we investigated cw laser characteristics over a range of pump wavelengths compatible with diode pumping. Room-temperature cw operation with a tuning range of 1175 to 1375 nm was achieved. Kerr-lens mode-locked operation of this laser was also demonstrated with pulse durations of ~50 fs.
© 1996 Optical Society of America
Original Manuscript: July 24, 1996
Published: December 15, 1996
B. Golubovic, V. P. Mikhailov, B. E. Bouma, I. P. Bilinsky, and J. G. Fujimoto, "Thin crystal, room-temperature Cr4+:forsterite laser using near-infrared pumping," Opt. Lett. 21, 1993-1995 (1996)