Controlled-inversion-profile amplifier as soft aperture
Abstract
A new method of achieving a soft aperture for profiling the transverse distribution of laser beam intensity is proposed. An amplifier with cross-sectionally profiled inversion is used. The required profiling can be achieved by using the scatter of the inversion of an auxiliary laser emission excited in certain regions of the active element of the amplifier. Experimental results are presented on an amplifier with cylindrical active element made of neodymium glass, in which inversion was profiled by the emission at internal ring modes during reflection from the polished cylindrical surface of the active element. The proposed method will permit a significant reduction in the inhomogeneities of the transverse distribution due to diffraction on different apertures.
- Publication:
-
Kvantovaia Elektronika Moscow
- Pub Date:
- February 1979
- Bibcode:
- 1979KvanE...6..377B
- Keywords:
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- Laser Outputs;
- Light Amplifiers;
- Light Beams;
- Luminous Intensity;
- Radiation Distribution;
- Cross Sections;
- Glass;
- Laser Materials;
- Laser Modes;
- Neodymium Lasers;
- Population Inversion;
- Lasers and Masers