Abstract
By means of boundary finite-element method,the field distributions and eigenvalues of the fundamental mode of the plano-concave resonator with a tilted Gaussian-reflectivity plane mirror are calculated and discussed.The results show that the laser mode moves along the direction of the mirror tilting.When the tilt angle of the mirror is big enough,the mode is distorted,no longer with a Laguerre-Gaussian distribution.Furthermore,following the increasing of the tilt angle,the far field distributions become bad,and the eigenvalue decrease.By decreasing the characteristic radius of the Gaussian-reflectivity,the distortion of the mode that is induced by the mirror tilting is decreased.
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