The magnitudes and locations of the beam waists in both the sagittal and the tangential planes have been found by means of the <i>ABCD</i> matrix method for a triangular resonator. Equilateral and isosceles resonators are discussed, and curves are given from which resonators with astigmatism-free beams can be designed. A frequency-doubled triangular Nd ring laser has been constructed after this design, and it is demonstrated that this laser emits a single longitudinal mode with a circular TEM<sub>00</sub> Gaussian beam.
© 2000 Optical Society of America
(140.3410) Lasers and laser optics : Laser resonators
(140.3530) Lasers and laser optics : Lasers, neodymium
(140.3560) Lasers and laser optics : Lasers, ring
(140.3570) Lasers and laser optics : Lasers, single-mode
(190.2620) Nonlinear optics : Harmonic generation and mixing
Torben Skettrup, Thomas Meelby, Kjartan Færch, Søren Lund Frederiksen, and Christian Pedersen, "Triangular Laser Resonators with Astigmatic Compensation," Appl. Opt. 39, 4306-4312 (2000)