Abstract
Previous calculations of the low-loss modes of a symmetric cylindrical confocal laser resonator have been extended to the asymmetric case. Diffraction losses are governed by the geometric-mean Fresnel number N <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">m</inf> of the two end mirrors and, in the system we consider, by the Fresnel number N <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">o</inf> of an output coupling aperture in one of the mirrors. Loss factors and mirror field distributions have been calculated numerically for different N <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">o</inf> for N <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">m</inf> in the range 0.6 ≦ N <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">m</inf> ≦ 2.
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