Abstract
A method for selective excitation of Ince-Gaussian modes is presented. The method is based on the spatial distributions of Ince-Gaussian modes as well as the transverse mode selection theory. Significant diffraction loss is introduced in a resonator by using opaque lines at zero-intensity positions, and this loss allows to excite a specific mode; we call this method “loss control.” We study the method by means of numerical simulation of a half-symmetric laser resonator. The simulated field is represented by angular spectrum of the plane waves representation, and its changes are calculated by the two-dimensional fast Fourier transform algorithm when it passes through the optical elements and propagates back and forth in the resonator. The output lasing modes of our method have an overlap of over 90 % with the target Ince-Gaussian modes. The method will be beneficial to the further study of properties and potential applications of Ince-Gaussian modes.
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Acknowledgments
This study was supported by the Fundamental Research Funds for the Central Universities, China, HUST, CXY13Q012.
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Lei, J., Hu, A., Wang, Y. et al. A method for selective excitation of Ince-Gaussian modes in an end-pumped solid-state laser. Appl. Phys. B 117, 1129–1134 (2014). https://doi.org/10.1007/s00340-014-5935-6
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DOI: https://doi.org/10.1007/s00340-014-5935-6