In this research, a 1064 nm single-longitudinal-mode (SLM) vortex beam was generated from an annular-pumped Nd:YVO 4 microchip laser, in which a circular Dammann grating was used to reshape the 808 nm pump light into an annular intensity profile. As a result, the laser emitted a SLM LG 01 beam with a maximum output power of 192 mW. A straightforward technique for producing SLM vortex beams is made available by this work.
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Song et al. (2024) studied this question.
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