講演情報
[23a-A310-7]Direct generation of orange and red 1st order Bessel-like beams using Pr fiber
〇Yuto Yoneda1, Srinvasa Rao Allam1, Yasushi Fujimoto2, Katsuhiko Miyamoto1, Takashige Omatsu1 (1.Chiba Univ., 2.CIT)
キーワード：
optical vortex、Pr doped fiber、Bessel-like vortex
We report on the demonstration of selective oscillation of Bessel-like vortex beams from the Pr3+ WPFG fiber laser in combination with an intracavity lens with strong spherical aberration.
The system showed the selective laser operation of a red (637 nm) or orange (605 nm) line by properly adjusting the position of the intracavity lens along the optical axis direction owing to chromatic aberrations. Note that the selective control of negative or positive topological charge of the generated vortex output was achieved by appropriately adjusting the lateral position of the intracavity lens.The maximum output powers of 605 nm and 637 nm Bessel-like vortex outputs were measured to be 20 mW and 83 mW, respectively, at the pump power of 2.3W. The system will be potentially extended to generate cyan (480 nm), green (523 nm) and deep-red (697 nm) Bessel-like vortex outputs.
The system showed the selective laser operation of a red (637 nm) or orange (605 nm) line by properly adjusting the position of the intracavity lens along the optical axis direction owing to chromatic aberrations. Note that the selective control of negative or positive topological charge of the generated vortex output was achieved by appropriately adjusting the lateral position of the intracavity lens.The maximum output powers of 605 nm and 637 nm Bessel-like vortex outputs were measured to be 20 mW and 83 mW, respectively, at the pump power of 2.3W. The system will be potentially extended to generate cyan (480 nm), green (523 nm) and deep-red (697 nm) Bessel-like vortex outputs.