[12a-B508-1~11] 3.5 Laser system and materials

△ [12a-B508-9] Intra-cavity second harmonic generation of high order vortex modes

〇(M2)Kenshirou Niinuma¹, Adam Valles², Shunsuke Gotou¹, Katsuhiko Miyamoto^1,2, Takashige Omatsu^1,2 (1.Chiba Univ., 2.MCRC Chiba Univ.)

Keywords:Structured Laser Light, Optical Vortex

Optical vortex beams have a phase singularity derived from the spiral wavefront and a doughnut-shaped intensity distribution of the pumping beam. In order to extend the possible applications of such vortex beams, it is essential to count with a variety of laser light beams generated by means of vortex modes as the fundamental mode. In this study, we constructed a laser cavity based on Laguerre-Gaussian mode (index ℓ), which is the most typical optical vortex, and coupled multiple Laguerre-Gaussian modes by generating second harmonic within the cavity resonator.