Secondary Raman and Brillouin mode suppression in two- and three-mirror-cavity diamond Raman lasers

Muye Li; Yuxiang Sun; Huawei Jiang; Richard P. Mildren; Ondrej Kitzler; David J. Spence; Yan Feng

doi:10.1364/OE.483482

Secondary Raman and Brillouin mode suppression in two- and three-mirror-cavity diamond Raman lasers

Muye Li, Yuxiang Sun, Huawei Jiang, Richard P. Mildren, Ondrej Kitzler, David J. Spence, Yan Feng

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

We report an investigation into secondary mode suppression in single longitudinal mode (SLM) 1240 nm diamond Raman lasers. For a three-mirror V-shape standing-wave cavity incorporating an intra-cavity LBO crystal to suppress secondary modes, we achieved stable SLM output with a maximum output power of 11.7 W and a slope efficiency 34.9%. We quantify the level of χ(2) coupling necessary to suppress secondary modes including those generated by stimulated Brillouin scattering (SBS). It is found that SBS-generated modes often coincide with higher-order spatial modes in the beam profile and can be suppressed using an intracavity aperture. Using numerical calculations, it is shown that the probability for such higher-order spatial modes is higher for an apertureless V-cavity than in two-mirror cavities due its contrasting longitudinal mode-structure.

Original language	English
Pages (from-to)	8622-8631
Number of pages	10
Journal	Optics Express
Volume	31
Issue number	5
DOIs	https://doi.org/10.1364/OE.483482
Publication status	Published - 27 Feb 2023

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abstract = "We report an investigation into secondary mode suppression in single longitudinal mode (SLM) 1240 nm diamond Raman lasers. For a three-mirror V-shape standing-wave cavity incorporating an intra-cavity LBO crystal to suppress secondary modes, we achieved stable SLM output with a maximum output power of 11.7 W and a slope efficiency 34.9%. We quantify the level of χ(2) coupling necessary to suppress secondary modes including those generated by stimulated Brillouin scattering (SBS). It is found that SBS-generated modes often coincide with higher-order spatial modes in the beam profile and can be suppressed using an intracavity aperture. Using numerical calculations, it is shown that the probability for such higher-order spatial modes is higher for an apertureless V-cavity than in two-mirror cavities due its contrasting longitudinal mode-structure. ",

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AU - Li, Muye

AU - Sun, Yuxiang

AU - Jiang, Huawei

AU - Mildren, Richard P.

AU - Kitzler, Ondrej

AU - Spence, David J.

AU - Feng, Yan

PY - 2023/2/27

Y1 - 2023/2/27

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AB - We report an investigation into secondary mode suppression in single longitudinal mode (SLM) 1240 nm diamond Raman lasers. For a three-mirror V-shape standing-wave cavity incorporating an intra-cavity LBO crystal to suppress secondary modes, we achieved stable SLM output with a maximum output power of 11.7 W and a slope efficiency 34.9%. We quantify the level of χ(2) coupling necessary to suppress secondary modes including those generated by stimulated Brillouin scattering (SBS). It is found that SBS-generated modes often coincide with higher-order spatial modes in the beam profile and can be suppressed using an intracavity aperture. Using numerical calculations, it is shown that the probability for such higher-order spatial modes is higher for an apertureless V-cavity than in two-mirror cavities due its contrasting longitudinal mode-structure.

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Secondary Raman and Brillouin mode suppression in two- and three-mirror-cavity diamond Raman lasers

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