Paper detail

Generation of Chinese-characters-like modes with transverse mode locked lasers

Spontaneous transverse mode locking to generate optical vortex arrays is already widely studied for the frequency degenerated transverse modes. While, the mode locking between transverse modes in different orders (non-frequency degenerated families) to achieve spatial stationary beam patterns is rarely reported. The theory of transverse mode locking is discussed. Concepts of general transverse mode locking (G-TML) and restricted transverse mode locking (R-TML) are mentioned. It's experimentally shown that R-TML is possible in microchip cavities with high nonlinearity. More interestingly, some Chinese characters like laser modes can be generated by microchip lasers with this special transverse mode locking effect. And various experimental results and corresponding simulations are presented.

preprint2020arXivOpen access

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