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Abstract— <p>A highly Yb-doped polarization-maintaining fiber has been developed. Optimization of the aluminophosphosilicate core composition made it possible to achieve a high gain (comparable with that of phosphate glasses), simultaneously with high pump-to-signal conversion efficiency. Codoping the core with germanium oxide provided high photosensitivity and made it possible to record highly reflective fiber Bragg gratings directly in the active fiber. Single-frequency fiber lasers have been designed based on the developed fiber, which generate in a single polarization mode with a record-short cavity length, equal to 14 mm. The pump-to-signal conversion efficiency was shown to be 22% for a polarized single-frequency laser at a wavelength of 1064 nm and 17% for a polarized single-frequency laser at 976 nm.</p>

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Short Single-Frequency Fiber Lasers with Distributed Bragg Reflectors Based on Highly Yb-Doped Photosensitive Polarization-Maintaining Silica-Based Fiber

  • 期刊论文

  • 发表日期：

    2025年12月1日

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  • I. A. Semenov,
  • A. A. Rybaltovsky,
  • D. A. Davydov,
  • M. E. Likhachev,
  • A. S. Lobanov,
  • D. S. Lipatov

摘要

Abstract—

A highly Yb-doped polarization-maintaining fiber has been developed. Optimization of the aluminophosphosilicate core composition made it possible to achieve a high gain (comparable with that of phosphate glasses), simultaneously with high pump-to-signal conversion efficiency. Codoping the core with germanium oxide provided high photosensitivity and made it possible to record highly reflective fiber Bragg gratings directly in the active fiber. Single-frequency fiber lasers have been designed based on the developed fiber, which generate in a single polarization mode with a record-short cavity length, equal to 14 mm. The pump-to-signal conversion efficiency was shown to be 22% for a polarized single-frequency laser at a wavelength of 1064 nm and 17% for a polarized single-frequency laser at 976 nm.