Intra-Cavity Spiral Phase Plate Laser with Non-Inverting Sagnac Mirror

William R. Kerridge-Johns

doi:10.1364/CLEOPR.2022.CThP1H_04

Proceedings of the 2022 Conference on Lasers and Electro-Optics Pacific Rim
Technical Digest Series (Optica Publishing Group, 2022),
paper CThP1H_04
•https://doi.org/10.1364/CLEOPR.2022.CThP1H_04

Intra-Cavity Spiral Phase Plate Laser with Non-Inverting Sagnac Mirror

William R. Kerridge-Johns

Conference on Lasers and Electro-Optics/Pacific Rim 2022

Sapporo Japan
31 August–5 September 2022
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Solid State and Vortex Lasers (CThP1H)

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W. R. Kerridge-Johns, "Intra-Cavity Spiral Phase Plate Laser with Non-Inverting Sagnac Mirror," in Proceedings of the 2022 Conference on Lasers and Electro-Optics Pacific Rim, Technical Digest Series (Optica Publishing Group, 2022), paper CThP1H_04.

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Abstract

We propose and experimentally demonstrate intra-cavity spiral phase plate use with a non-inverting Sagnac mirror. The Nd:YVO₄ laser yielded high purity (>95%) LG₀₁ and LG₀₂ vortex output. The laser mode self-adapted to optimise LG₀₁ purity, minimizing higher order radial mode production characteristic of external SPP use.

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