METHOD FOR REDUCING LASER BEAM DIVERGENCE IN RING-SHAPED ACTIVE MEDIUM LASERS Russian patent published in 2005 - IPC

FIELD: electronic engineering; beam generation for ring-shaped active medium lasers.

SUBSTANCE: proposed method includes organization of gain distribution throughout sectional area of active medium with ring distribution of gain excess above resonator loss. Proportion between external and internal diameters d_ext and d_int, respectively, on boundaries of gain excess above resonator loss throughout beam section is chosen from following expression: 2.21 < d_ext/d_int < 2.61.

EFFECT: reduced divergence of laser beam at minimal output radiation power loss without complicating resonator mechanical design.

2 cl