High Efficiency TEM(sub 00) Mode Nd: Laser Study Program.

Abstract

The overall objective of this contract was to extend the state of the art of the low order mode CW Nd:YAG 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.

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1975
Accession Number
ADA014838

Entities

People

  • James E. Murray

Tags

DTIC Thesaurus Topics

  • Contracts
  • Distortion
  • Efficiency
  • Lasers
  • Measurement
  • Resonators
  • Yag Lasers

Fields of Study

  • Physics

Readers

  • Computer Science.
  • Optical Physics and Photonics.
  • Systems Analysis and Design

Technology Areas

  • Directed Energy