1 June 1992 Beam shaping of a multimode high-energy laser
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The output beam profile of a laser is the consequence of an optical resonator that is usually designed to optimize laser power. For a specific application, however, the intensity profile may lack the desired shape. An optical design that produces the transformation of the nominal 5.2 inch diameter output of a stable, multi-mode, high energy CO2 laser into a narrow line of width 0.005 X 1.0 inches with extremely high brightness (> 90 Kw/cm2) is discussed. The number of modes and power produced by the Electric Discharge Coaxial Laser (EDCL II) at the Phillips Laboratory were controlled by resonator design and intracavity apertures. Gaussian beam propagation, diffractive propagation, and geometric skew aspheric raytrace techniques were used to design an optical train which was fully corrected for all off axis aberrations. The novel use of a cylindrical mirror combined with a slit aperture reimaging technique produced the final line image. Included are measured experimental results that confirmed the design approach.
© (1992) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Vance A. Hedin, Vance A. Hedin, Burton D. O'Neil, Burton D. O'Neil, John H. Erkkila, John H. Erkkila, "Beam shaping of a multimode high-energy laser", Proc. SPIE 1625, Design, Modeling, and Control of Laser Beam Optics, (1 June 1992); doi: 10.1117/12.58932; https://doi.org/10.1117/12.58932

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