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Diode-pumped Q-switched Alexandrite laser in single longitudinal mode operation with Watt-level output power

: Munk, A.; Strotkamp, M.; Walochnik, M.; Jungbluth, B.; Traub, M.; Hoffmann, H.-D.; Poprawe, R.; Höffner, J.; Lübken, F.-J.


Optics Letters 43 (2018), No.22, pp.5492-5495
ISSN: 0146-9592
Journal Article
Fraunhofer ILT ()

We present significantly improved performance data of a diode-pumped 𝑄-switched Alexandrite laser in single longitudinal mode operation developed as a beam source for resonance lidar systems. The average output power of the laser—operating at the potassium resonance at 770 nm with a linewidth below 10 MHz—could be increased by a factor of five to the Watt-level by means of an optimized resonator design and pump scheme. The pulse energy is 1.7 mJ with a beam quality of M2≤1.1 in both spatial directions at a repetition rate of 500 Hz.