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LASER SYSTEMS AND MATERIALS
Disk lasers with off-axis beam paths in degenerated type cavities
V.B. Tsvetkov, D.A. Nikolaev
Prokhorov General Physics Institute of the Russian Academy of Sciences, 119991, Vavilov str., 38, Moscow, Russia
e-mail: tsvetkov@lsk.gpi.ru
The wide use of thin disk laser concept occurs due to their excellent property of a significant reduction of the thermal effects in the active medium. Moreover, its outstanding features give rise to new applications with the multipoint pumping. In this case all the intracavity beams become off-axis beams with a closed loop trajectory and the resonator possesses the property of degenerated laser cavity.
At this way we may use two different concepts. The first is the use of the common degenerate cavity configuration with a consequent cavity round trips of a single laser beam through all the pumping points. In this case we may easily realize single frequency or double frequency lasers. The second way consists in the realization of phase synchronization of several laser channels. In this case the super mode with TEM00 intensity profile and the sizes corresponding to the whole pumping area is obtained.
Experimental data concerning methods of multi-beam pumping and degenerated cavity realization enable to discuss the possibility of application.
