Berlin 2001 – wissenschaftliches Programm
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Q: Quantenoptik
Q 36: Laser III
Q 36.2: Vortrag
Freitag, 6. April 2001, 17:45–18:00, H 104
Continuous Wave Diode-Pumping and Efficient Laser Operation of a Widely Tunable Cr2+:ZnSe-Laser — •Michael Mond1, Hanno Kretschmann1, Ernst Heumann1, Günter Huber1, Stefan Kück1, V.I. Levchenko2, V.N. Yakimovich2, A.V. Podlipenski3, V.G. Shcherbitsky3, and N.V. Kuleshov3 — 1Institut für Laser-Physik, Universität Hamburg, Germany — 2Institute of Solid State and Semiconductor Physics, National Academy of Science, Minsk, Belarus — 3International Laser Center, Minsk, Belarus
In the last 5 years, divalent chromium ions in chalcogenide crystals have become of increasing interest, largely because of their use as widely tunable infrared lasers.
In this paper, we present continuous wave diode-pumping at 1.54 µ m of a Cr2+:ZnSe single crystal. The maximum output power was 16 mW with a slope efficiency of 14 %. In addition, efficient high power laser operation was obtained with a Tm:YAG-laser at 2.01 µ m as pump source. A slope efficiency as high as 73 % with a maximum output power of 1.4 W was achieved. Furthermore, the tunability of this laser in gain-switched operation was extended into the long wavelength range above 3 µ m for the first time. The tuning range of 900 nm (from 2.14 to 3.04 µ m) is comparable to the range of a titanium sapphire laser. In gain-switched operation pulse energies of up to 0.7 mJ were obtained with a center wavelength of 2.50 µ m.