Second harmonic of higher-order Poincare sphere beam with two orthogonal 5%MgO:PPLN crystals

被引：0

作者：

Jiang, Qinan ^{[1
]}

Zhao, Minglin ^{[1
]}

Wang, Yuanxiang ^{[1
]}

Wang, Shuolin ^{[1
]}

Dou, Jiantai ^{[1
]}

Liu, Jun ^{[1
]}

Li, Bo ^{[2
,3
]}

Hu, Youyou ^{[1
]}

机构：

[1] Jiangsu Univ Sci & Technol, Sch Sci, Zhenjiang 212100, Peoples R China

[2] Huazhong Univ Sci & Technol, Sch Opt & Elect Informat, Wuhan 430074, Peoples R China

[3] Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Opt Valley Lab, Wuhan 430074, Peoples R China

来源：

APL PHOTONICS | 2024年 / 9卷 / 05期

基金：

中国国家自然科学基金;

关键词：

CYLINDRICAL VECTOR BEAMS; ORBITAL ANGULAR-MOMENTUM; CONTROLLED GENERATION; MICROSCOPY;

D O I：

10.1063/5.0198012

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this work, the second harmonic (SH) of higher-order Poincare sphere (HOPS) beam was introduced and demonstrated with two orthogonal 5%MgO:PPLN crystals. Based on the quasi-phase-matching technique, the vectorial coupled wave equations were derived to simulate the SH of HOPS beams through the two crystals, including the cylindrical vector beams (CVBs), elliptically polarized CVBs (EPCVBs), and circularly polarized vortex beams. Then, the experimental setup was established to reveal that the SH of CVBs and EPCVBs present the four-lobed structure and still exhibit vector characteristics. Meanwhile, the circularly polarized vortex beams become the linearly polarized vortex beams with double phase topology, confirming the conservation of orbital angular momentum. Moreover, the maximum SH conversion efficiency of CVBs, EPCVBs, and circularly polarized vortex beams can reach 25.3%, 23.4%, and 29.4%, respectively, which may be instructive for promoting the SH generation of vector vortex beams with high efficiency. (c) 2024 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

引用

页数：10