Abstract
With the example of the serial model of a pulsed Nd‐glass laser, it is shown that the use of an unstable resonator with a semireflecting homogeneous exit mirror makes it possible to significantly decrease the laser‐beam divergence and increase the uniformity of the radiation‐intensity distribution in the near zone. We were the first to obtain a laser‐beam quality of ∼(40–50) mm·mrad for technological glass lasers and to attain a depth of fusing of of ∼6.3 mm for steel (aspect ratio ∼10) for an energy of ≈ 23 J. The obtained uniformity of the radiation‐intensity distribution was estimated at the level of ±10%. The beam‐quality level attained for the Nd‐glass laser beam allows us to recommend it for both realization of deep‐fusion regimes and laser hardening without the use of external integrating optical elements.
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Kayukov, S.V., Yares'ko, S.I. & Mikheev, P.A. Widening the Scope of Working of Solid‐State Nd‐Glass Lasers. Journal of Engineering Physics and Thermophysics 74, 825–832 (2001). https://doi.org/10.1023/A:1016705705323
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DOI: https://doi.org/10.1023/A:1016705705323