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Index-tunable structured-light beams from a laser with an intracavity astigmatic mode converter

Index-tunable structured-light beams from a laser with an intracavity astigmatic mode converter
Index-tunable structured-light beams from a laser with an intracavity astigmatic mode converter
Structured-light lasers are highly topical due to not only their ability to tailor customized distribution of intensity, phase, orbital angular momentum (OAM), and other optical properties, but also the compact and simple at-the-source generation scheme. Here we propose a form of structured-light laser, intracavity mode convertor laser, with the ability to generate two-dimensional (2D) tunable high-order Hermite-Gaussian (HG) modes with a large indice range (up to 15). The mode convertor constituted by two cylindrical lenses is always used for external OAM conversion, but here we show that it can be inserted into a laser cavity as an intracavity element for symmetry-breaking control, which we also demonstrate with a complete matrix optics theory. The generated 2D HG modes can also be converted into Laguerre-Gaussian (LG) vortex beams with both tunable OAM and radial momentum. Moreover, we also show the ability to directly generate vortex beam from our laser cavity. Our approach meets the urgent necessity for a practical laser device for more versatile light, providing more alternative parametric space for structure control and fostering extended applications.
2331-7019
Pan, Jing
cae3d33b-a85d-4fef-9446-5ded0384dfc8
Shen, Yijie
42410cf7-8adb-4de6-9175-a1332245c368
Wan, Zhensong
becbd162-65a9-4191-920c-ee958a64c0c7
Fu, Xing
b93bc44e-4b8c-4e94-9b40-ad53938c59d6
Zhang, Hengkang
71ab61f6-e757-4fd1-a7ba-e3bb11860ebd
Liu, Qiang
4db828c1-7c28-44fc-a1eb-089038809477
Pan, Jing
cae3d33b-a85d-4fef-9446-5ded0384dfc8
Shen, Yijie
42410cf7-8adb-4de6-9175-a1332245c368
Wan, Zhensong
becbd162-65a9-4191-920c-ee958a64c0c7
Fu, Xing
b93bc44e-4b8c-4e94-9b40-ad53938c59d6
Zhang, Hengkang
71ab61f6-e757-4fd1-a7ba-e3bb11860ebd
Liu, Qiang
4db828c1-7c28-44fc-a1eb-089038809477

Pan, Jing, Shen, Yijie, Wan, Zhensong, Fu, Xing, Zhang, Hengkang and Liu, Qiang (2020) Index-tunable structured-light beams from a laser with an intracavity astigmatic mode converter. Physical Review Applied, 14 (4), [044048]. (doi:10.1103/PhysRevApplied.14.044048).

Record type: Article

Abstract

Structured-light lasers are highly topical due to not only their ability to tailor customized distribution of intensity, phase, orbital angular momentum (OAM), and other optical properties, but also the compact and simple at-the-source generation scheme. Here we propose a form of structured-light laser, intracavity mode convertor laser, with the ability to generate two-dimensional (2D) tunable high-order Hermite-Gaussian (HG) modes with a large indice range (up to 15). The mode convertor constituted by two cylindrical lenses is always used for external OAM conversion, but here we show that it can be inserted into a laser cavity as an intracavity element for symmetry-breaking control, which we also demonstrate with a complete matrix optics theory. The generated 2D HG modes can also be converted into Laguerre-Gaussian (LG) vortex beams with both tunable OAM and radial momentum. Moreover, we also show the ability to directly generate vortex beam from our laser cavity. Our approach meets the urgent necessity for a practical laser device for more versatile light, providing more alternative parametric space for structure control and fostering extended applications.

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Index-Tunable Structured-Light Beams from a Laser with an Intracavity Astigmatic Mode Converter - Accepted Manuscript
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Accepted/In Press date: 8 September 2020
e-pub ahead of print date: 26 October 2020

Identifiers

Local EPrints ID: 445365
URI: http://eprints.soton.ac.uk/id/eprint/445365
ISSN: 2331-7019
PURE UUID: 6ce013aa-7ddf-4fbc-9387-5ed9ad3467b3

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Date deposited: 04 Dec 2020 17:30
Last modified: 14 Sep 2021 19:47

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