An Experimental Investigation of the Resonant Modes of a Rooftop Laser.
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF ENGINEERING
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First-surface roof-reflectors were constructed with apex angles near 90 deg and used as resonator elements in a 2-meter laser cavity with a gain medium of electrically excited CO2, N2, and He at 10 torr pressure. The divergence, far-field intensity distribution, and beat frequency components were measured for the output beams of several roof-resonator configurations. Both single-mode and multi-mode operation was achieved, and the mode structure of the several alignment-insensitive configurations was inferred. Author
- Lasers and Masers