Journal ArticleDOI
Focusing of multimode laser beams with variable beam parameters
R. Iffländer,H. Weber +1 more
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TLDR
In this article, a focus of constant diameter and constant position can be realized if the output beam of the laser is varying in diameter only, and the variation of the output-beam divergence can be compensated by a different optical system.Abstract:
This paper deals with the focusing of multimode radiation. Two special types of resonator are presented: type 1 produces constant beam radius at varying internal thermal lensing and type 2 has, under some conditions, constant beam divergence. It will be shown that by suitable imaging, a focus of constant diameter and constant position can be realized, if the output beam of the laser is varying in diameter only. Variation of the output beam divergence can be compensated by a different optical system.read more
Citations
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Influence of Spherical Aberration of the Active Medium on the Performance of
N. Hodgson,H. Weber +1 more
TL;DR: In this article, the perfor- mance of both stable and unstable resonators is investigated theoretically by numerically solving the Fresnelintegrals, in-cluding the amplification, the refractive power and the aber- ration of the rod.
Journal ArticleDOI
Influence of spherical aberration of the active medium on the performance of Nd:YAG lasers
N. Hodgson,H. Weber +1 more
TL;DR: In this article, the performance of both stable and unstable resonators is investigated theoretically by numerically solving the Fresnel-integrals, including the amplification, the refractive power and the aberration of the rod.
Journal ArticleDOI
Multirod resonators for high-power solid-state lasers with improved beam quality
TL;DR: In this article, the beam quality can be improved without reducing the output power by using several rods inside the same resonator and by a suitable choice of rod position and resonator parameters.
Journal ArticleDOI
Beam-quality changes generated by thermally-induced spherical aberration in laser cavities
TL;DR: In this article, the intensity moment formalism was used to analyze the beam quality parameter of the emitted laser beams and a number of resonance conditions that certain beam shape parameters of any stable laser mode should fulfill are derived.
Journal ArticleDOI
High-power solid-state lasers with unstable resonators
N. Hodgson,H. Weber +1 more
TL;DR: In this article, the thermal lensing properties of stable and unstable resonators are compared and rules for the design of optimized stable resonators containing a focusing rod are given for the optimization of optimized instability.
References
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Journal ArticleDOI
Laser beams and resonators
H. Kogelnik,Tingye Li +1 more
TL;DR: This paper is a review of the theory of laser beams and resonators and emphasis is placed on formulations and derivations which lead to basic understanding and on results which bear practical significance.
Journal ArticleDOI
Spot size and divergence for Laguerre Gaussian beams of any order
Journal ArticleDOI
Beam divergence and refractive power of directly coated solid state lasers
TL;DR: In this article, a relation between the far field divergence angle of a laser output beam and the elements of the laser resonator matrix is derived, which yields an expression for the FAR of the output beam in terms of the pump light induced refractive power D of the rod.
Journal ArticleDOI
Diffraction losses and mode structure of equivalent TEM(00) optical resonators.
H. P. Kortz,H. Weber +1 more
TL;DR: By means of equivalence relations and adaption of the aperture size to the size of the undisturbed Gaussian beam it is possible to reduce the number of characterizing parameters to two: the adapting factor, the product.