Single-frequency orbital angular momentum switchable modes from a microchip laser.
Opt Lett
; 49(11): 3198-3201, 2024 Jun 01.
Article
em En
| MEDLINE
| ID: mdl-38824362
ABSTRACT
We demonstrate the direct generation of single-frequency switchable orbital angular momentum (OAM) modes in a 1â
µm wavelength range using a NdYVO4 microchip laser. The 808â
nm laser diode pump beam is shaped into annular through an axicon associated with a lens. By adjusting the diameter and power of the annular pump beam, various OAM modes with different mode volumes can oscillate inside the NdYVO4 microchip. Moreover, a single-frequency output is also available due to the short cavity of the microchip. In the proof-of-principle experiment, single-frequency twofold multiplexed OAM modes | ± 1> and | ± 2> are generated, with experimentally measured fidelity higher than 96%. This work presents a compact and versatile single-frequency OAM source and will inspire multiple advanced scenarios ranging from classical to quantum photonics.
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MEDLINE
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En
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Opt Lett
Ano de publicação:
2024
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Article