CHENG Yuan-ying, HU Jin, LI Jia-rong. Numerical Matrix Method of Mode for Optical Resonators[J]. Chinese Journal of Lasers, 2002, 29(s1): 44
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The transfer matrix of an optical resonator is obtained based on Frensnel-Kirchhoff diffracted integral equation by dividing the mirror into finite grids. The eigenvalue calculation and iteration of the transfer matrix will lead to the mode and far-field beam characterization of the resonator. An example is illustrated: confocal unstable resonator.