[21a-E214-1~9] 4.6 Quantum Optics and Nonlinear Optics

▼ [21a-E214-2] Flower-shaped modes generation from a tunable optical vortex parametric laser

〇(DC)Roukuya Mamuti¹, Shunsuke Goto¹, Katsuhiko Miyamoto^1,2, Takashige Omatsu^1,2 (1.Chiba Univ., 2.MCRC)

Keywords:optical vortex, optical parametric oscillator

Optical vortex beam exhibits a ring-shaped spatial profile andcarries an orbital angular momentum (OAM), characterized by an azimuthal phase term, (ℓ is a topological charge and is the azimuthal angle), and has beenwidely applied in a variety of fields, such asoptical tweezing and manipulation, and material processing. Also, flower-shaped modes, i.e. coherent superposition of optical vortices with different OAM states also receive much attention, because their unique properties provide potentially advanced applications, including optical trapping and quantum optics. The aforementioned applications strongly desire a versatility of wavelength and OAM state to optical vortex sources.
In this presentation, we report on the first demonstration of a tunable vortex laser with versatile flower-shaped modes based on an optical vortex pumped optical parametric oscillator(OPO) formed of a non-critical phase-matching LiB₃O₅(NCPM-LBO) crystalin a linear cavity configuration with a cavity length of 60 mm.