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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 38, Iss. 14 — May. 10, 1999
  • pp: 3025–3029

Simplified intracavity phase plates for increasing laser-mode discrimination

Anatolii A. Napartovich, Nikolay N. Elkin, Vera N. Troschieva, Dmitry V. Vysotsky, and James R. Leger  »View Author Affiliations


Applied Optics, Vol. 38, Issue 14, pp. 3025-3029 (1999)
http://dx.doi.org/10.1364/AO.38.003025


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Abstract

Recently, a new class of laser resonators was introduced that utilizes diffractive mirrors and an additional intracavity diffractive phase element. High modal discrimination and low fundamental-mode loss were achieved simultaneously by use of sinusoidal and pseudorandom diffractive phase elements. An intracavity phase element consisting of a simple single-step phase modulation is approximated by a Gaussian with a small radius. Explicit expressions are obtained for the modal-discrimination factor as a function of resonator parameters with a Gaussian output mirror. Numerical simulations are performed for a phase element with a step singularity in the phase function, the fundamental mode of this cavity being super-Gaussian. The modal discrimination of the cavity is studied for different radii of the single-step phase modulation, the position of the phase plate, and the cavity Fresnel number. Optimum solutions are found for a plane output mirror with either a striped or a circular shape.

© 1999 Optical Society of America

OCIS Codes
(140.3300) Lasers and laser optics : Laser beam shaping
(140.3410) Lasers and laser optics : Laser resonators
(140.3430) Lasers and laser optics : Laser theory
(140.3460) Lasers and laser optics : Lasers
(140.4780) Lasers and laser optics : Optical resonators

History
Original Manuscript: August 10, 1998
Revised Manuscript: December 7, 1998
Published: May 10, 1999

Citation
Anatolii A. Napartovich, Nikolay N. Elkin, Vera N. Troschieva, Dmitry V. Vysotsky, and James R. Leger, "Simplified intracavity phase plates for increasing laser-mode discrimination," Appl. Opt. 38, 3025-3029 (1999)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-38-14-3025

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