Abstract

We demonstrate that higher order transverse-mode beams can be selectively operated by creating their suitable gain distributions in a laser gain medium. By adjusting the scanning angles and the phase difference between two resonant scanning mirrors used for the manipulation of pump beam patterns, a wide variety of gain distributions such as linear, elliptical, and circular patterns were generated. As a result, single transverse-mode operations of many higher order transverse modes of Hermite–Gaussian, Laguerre–Gaussian, and Ince–Gaussian beams were realized. The switching of these modes was readily and quickly accomplished without further mechanical alignment and any optical elements.

© 2015 Optical Society of America

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