High Efficiency TEM(sub 00) Mode Nd: Laser Study Program.
Final rept. Jun 72-Jul 73,
HOLOBEAM INC PARAMUS N J
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The overall objective of this contract was to extend the state of the art of the low order mode CW NdYAG laser. The performance objective was a 50 watt TEM00 mode output at 1 efficiency. The first requirement in this program was to establish an unambiguous way in which to characterize low order mode beams so that any laser output beam could be measured and characterized against an absolute reference. The first part of Section II introduces such a beam characterization method. Resonators for enhanced low order mode operation are investigated in Section II. Section III describes probe beam measurements to investigate the cause of the anamolous cavity loss. They indicate the presence of a negative spherical aberration type of distortion in the thermally induced lens of a pumped YAG rod. Section IV discusses several possible ways to reduce this induced distortion.
- Lasers and Masers