Analytical expressions for the <i>M</i><sup>2</sup> factor and the mode-coherence coefficients of hyperbolic-cosine– (cosh-) Gaussian beams have been derived, and a simple method of producing cosh-Gaussian beams in an experiment, superposition of two decentered Gaussian beams, has been proposed. Our results will be useful for studying more-general Hermite–sinusoidal-Gaussian beams.
© 1999 Optical Society of America
Baida Lü, Bin Zhang, and Hong Ma, "Beam-propagation factor and mode-coherence coefficients of hyperbolic-cosine Gaussian beams," Opt. Lett. 24, 640-642 (1999)