Wavelength-tunable Hermite–Gaussian modes and an orbital-angular-momentum-tunable vortex beam in a dual-off-axis pumped Yb:CALGO laser
Wavelength-tunable Hermite–Gaussian modes and an orbital-angular-momentum-tunable vortex beam in a dual-off-axis pumped Yb:CALGO laser
A dual-off-axis pumping scheme is presented to generate wavelength-tunable high-order Hermite–Gaussian (HG) modes in Yb:CaGdAlO4 lasers. The mode and wavelength can be actively controlled by the off-axis displacements and pump power. The purities of the output HG modes are quantified by intensity distributions and the measured M2 values. The highest order reaches m = 15 for stable HGm,0 mode, and wavelength-tunable width is about 10 nm. Moreover, through externally converting the HGm,0 modes, the vortex beams carrying orbital angular momentum (OAM) with a large OAM-tunable range from ±1ℏ to ±15ℏ are produced. This work is effective for largely scaling the spectral and OAM tunable ranges of optical vortex beams.
291-294
Shen, Yijie
42410cf7-8adb-4de6-9175-a1332245c368
Meng, Yuan
8690642a-48a9-4b47-b0ac-dd1aea60f3b0
Fu, Xing
21bd4974-1d1f-4a6a-84e2-c805ef547450
Gong, Mali
cbf30aad-44d3-49d7-967a-1716d7e80668
15 January 2018
Shen, Yijie
42410cf7-8adb-4de6-9175-a1332245c368
Meng, Yuan
8690642a-48a9-4b47-b0ac-dd1aea60f3b0
Fu, Xing
21bd4974-1d1f-4a6a-84e2-c805ef547450
Gong, Mali
cbf30aad-44d3-49d7-967a-1716d7e80668
Shen, Yijie, Meng, Yuan, Fu, Xing and Gong, Mali
(2018)
Wavelength-tunable Hermite–Gaussian modes and an orbital-angular-momentum-tunable vortex beam in a dual-off-axis pumped Yb:CALGO laser.
Optics Letters, 43 (2), .
(doi:10.1364/OL.43.000291).
Abstract
A dual-off-axis pumping scheme is presented to generate wavelength-tunable high-order Hermite–Gaussian (HG) modes in Yb:CaGdAlO4 lasers. The mode and wavelength can be actively controlled by the off-axis displacements and pump power. The purities of the output HG modes are quantified by intensity distributions and the measured M2 values. The highest order reaches m = 15 for stable HGm,0 mode, and wavelength-tunable width is about 10 nm. Moreover, through externally converting the HGm,0 modes, the vortex beams carrying orbital angular momentum (OAM) with a large OAM-tunable range from ±1ℏ to ±15ℏ are produced. This work is effective for largely scaling the spectral and OAM tunable ranges of optical vortex beams.
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Accepted/In Press date: 7 December 2017
e-pub ahead of print date: 10 January 2018
Published date: 15 January 2018
Identifiers
Local EPrints ID: 442528
URI: http://eprints.soton.ac.uk/id/eprint/442528
ISSN: 0146-9592
PURE UUID: 355f8c2c-f9d1-4297-b2cf-c59d87bef1dc
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Date deposited: 17 Jul 2020 16:31
Last modified: 16 Mar 2024 08:31
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Contributors
Author:
Yijie Shen
Author:
Yuan Meng
Author:
Xing Fu
Author:
Mali Gong
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