Beam Profiling of a Multimode Laser.
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF ENGINEERING
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The experimental investigation into the intensity profile characteristics of a multimode, high-power, continuous-wave, CO2 laser is presented. Quantitative one-dimensional profiles were obtained using an enhanced swept null point calorimeter. Qualitative two-dimensional profiles were obtained using the IR transparency material -- 3M, Type 577. The results were the beam divergence is 3.75 mrad the intensity profile is characterized basically by a circular mode pattern, but superimposed by a distinguishable rectangular component the rectangular component only varies in intensity proportional to the laser power and inversely proportional to the optical path length the shot stability is about or - 7 wsq cm and the average profile deviation from an idealized flat top profile varies from 11 to 15. Author
- Lasers and Masers