Article

Bessel-Gauss output beam from a diode-pumped Nd:YAG laser

Optics Communications 238:335-340. DOI:10.1016/j.optcom.2004.05.012 pp.335-340

ABSTRACT We demonstrate a simple and compact laser source that directly produces a Bessel-Gauss beam. The laser resonator consists of a diode-end-pumped Nd:YAG crystal, a planar mirror, and a diffractive mirror designed to phase-conjugate only the lowest-order Bessel-Gauss beam.

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    Article: Theory of the unstable Bessel resonator.
    Raúl I Hernández-Aranda, Sabino Chávez-Cerda, Julio C Gutiérrez-Vega
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    ABSTRACT: A rigorous analysis of the unstable Bessel resonator with convex output coupler is presented. The Huygens-Fresnel self-consistency equation is solved to extract the first eigenmodes and eigenvalues of the cavity, taking into account the finite apertures of the mirrors. Attention was directed to the dependence of the output transverse profiles; the losses; and the modal-frequency changes on the curvature of the output coupler, the cavity length, and the angle of the axicon. Our analysis revealed that while the stable Bessel resonator retains a Gaussian radial modulation on the Bessel rings, the unstable configuration exhibits a more uniform amplitude modulation that produces output profiles more similar to ideal Bessel beams. The unstable cavity also possesses higher-mode discrimination in favor of the fundamental mode than does the stable configuration.
    Journal of the Optical Society of America A 10/2005; 22(9):1909-17. · 1.56 Impact Factor
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Keywords

Bessel-Gauss beam
 
diffractive mirror
 
lowest-order Bessel-Gauss beam
 
planar mirror