Direct generation of 523 nm orbital Poincare mode from a diode-pumped Pr3+:LiYF4 laser with an off-axis optical needle pumping geometry

被引：21
作者：
Rao, A. Srinivasa [1 ,2 ]
Miike, Taku [1 ,2 ]
Miamoto, Katsuhiko [1 ,2 ]
Omatsu, Takashige [1 ,2 ]
机构：
[1] Chiba Univ, Grad Sch Engn, Chiba 2638522, Japan
[2] Chiba Univ, Mol Chiral Res Ctr, Chiba 2638522, Japan
来源：
OPTICS EXPRESS | 2021年 / 29卷 / 19期
基金：
日本学术振兴会;
关键词：
ANGULAR-MOMENTUM; VORTEX BEAMS; RED; INTRACAVITY; ORANGE; LIGHT;
D O I：
10.1364/OE.439491
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We demonstrate an ultra-compact (8 mm-long) green orbital Poincare Pr3+:LiYF4 (YLF) laser, in which the intracavity lasing modes are represented as eigenmodes on an equivalent orbital Poincare sphere (eOPS). This is achieved through the simple application of an 'optical-needle' pumping geometry in conjunction with off-axis laser mode-manipulation. Optical vortices that are produced and mapped on north and south poles of the eOPS exhibit a maximum output power of 304 mW with a pump-to-laser-output slope efficiency of 12%. In addition, higher-order structured modes, including Ince Gaussian (IG), helical IG (HIG), Hermite-Laguerre Gaussian (HLG) and vortex lattices, can be directly generated from the laser cavity. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
引用
收藏
页码：30409 / 30418
页数：10
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