Mr. Siyuan Zhang Profile

Siyuan Zhang

at Univ of Science and Technology of China

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Proceedings Article | 16 December 2022 Paper

All-fiber high-order transverse-mode switchable laser

Xinhua Jiang, Junna Yao, Siyuan Zhang, Anting Wang

Proceedings Volume 12501, 125010D (2022) https://doi.org/10.1117/12.2655577

KEYWORDS: Fiber lasers, Fiber Bragg gratings

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We propose and demonstrate a simple method to generate an all-fiber high-order transverse-mode switchable laser using a few-mode Bragg fiber grating (FM-FBG). The switchable output of the LP₀₂ mode, LP₁₁ mode, and LP₀₁ modes is precisely realized by adjusting the operating wavelength in the cavity, which breaks through the limitation of only two low-order modes in most reports about all-fiber transverse-mode switchable lasers. The slope efficiencies for the three modes are 2.5%, 5.9%, and 9.3%, respectively. The central wavelengths of the lasers are 1530.2 nm, 1531.3 nm, and 1532.1 nm, respectively, and the corresponding side mode suppression ratios are -61 dB, -67 dB, and -65 dB, which ensures the purity of the modes. This work has huge potential applications in sensing, mode division multiplexing, optical communication, laser processing, and surface plasmon excitation.

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