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Optica Publishing Group
  • Conference on Lasers and Electro-Optics
  • OSA Technical Digest (Optica Publishing Group, 1995),
  • paper CTuI63

Compact-large-mode-volume resonator with spatial filtering

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Abstract

Near-Gaussian beams in wide-aperture lasers with cylindrical active elements are usually obtained by using confocal unstable1 or stable telescopic resonators.2 In the cases in the literature the active volume is utilized most efficiently at reasonable cavity lengths. A semiconfocal resonator with diffraction filtering has also been reported.3 A common feature of these schemes is that spatial filtering and a large mode volume are achievable because of a large difference between mode cross sections in different parts of a cavity. In the case of strict requirements for the resonator length, this difference can result in the optical breakdown of a dielectric, the damage to the optical elements, a drastic decrease in the output coupling, and an increase in the sensitivity to alignment.

© 1995 Optical Society of America

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