[OPTICAL REVIEW Vol. 4, No. 1B (1997) 176-179]

Tunable Single-mode Pulsed Ti3+:Sapphire Laser Injection-Seeded by a Continuous-wave Cr3+:LiSrAlF6 Laser

Nilesh J. VASA,1 Kouki MORISHITA,1 Husayin PARHAT,1 Tatsuo OKADA,1 Mitsuo MAEDA1 and Osamu UCHINO2

1 Graduate School of Information Science and Electrical Engineering, Kyushu University, Hakozaki, Fukuoka, 812-81 Japan, 2 Meteorological Research Institute, 1-1 Nagamine, Tsukuba, Ibaraki, 305 Japan

(Received September 30, 1996; Accepted November 8, 1996)

Spectrally pure high-power tunable single-mode operation of a pulsed Ti3+:sapphire laser by a tunable injection-seeding is reported. The injection laser was a cw diode laser pumped, spectrally narrowed tunable Cr3+:LiSrAlF6 (Cr3+:LiSAF) laser with a grating in the auxiliary cavity. Single-mode tunable operation of a pulsed Ti3+:sapphire ring oscillator was obtained at different wavelengths in the range between 818 nm and 848 nm with a typical linewidth of 0.006 cm-1. To extend the applicability of this operation to a differential absorption lidar system, the single-mode Ti3+:sapphire oscillator output was amplified and a high energy output of 38 mJ was obtained with the same linewidth.

Key words : solid-state laser, tunable laser, injection seeding, Ti3+:sapphire laser, Cr3+:LiSrAlF6 laser, laser radar