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Abstract <p>Two compact fiber lasers generating in the range of 1535 nm, which are based on a specially developed composite highly doped erbium fiber, are presented. A DFB laser based on a 4.1-mm-long phase-shifted fiber Bragg grating (FBG) generates single-frequency radiation with single polarization; the linewidth is ~3 kHz and the output power is 170 µW at a pump power of 450 mW. The laser with a linear cavity configuration formed by the FBG and a dielectric mirror, which has a length of the active medium of 1.3 cm, also demonstrates single-frequency radiation with a linewidth of ~1 kHz and an output power of 1.08 mW at a pump power of 400 mW. As far as we know, these lasers have record-breaking short cavity lengths in their classes with the spectral and power characteristics suitable for a wide range of applications.</p>

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Record-Breaking Short Single-Frequency Fiber Lasers Based on a Composite Highly Doped Erbium Fiber

  • 期刊论文

  • 发表日期：

    2025年12月1日

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  • M. I. Skvortsov,
  • K. V. Kolosova,
  • E. V. Golikov,
  • A. V. Dostovalov,
  • V. S. Terentyev,
  • S. R. Abdullina,
  • O. N. Egorova,
  • S. L. Semenov,
  • S. A. Babin

摘要

Abstract

Two compact fiber lasers generating in the range of 1535 nm, which are based on a specially developed composite highly doped erbium fiber, are presented. A DFB laser based on a 4.1-mm-long phase-shifted fiber Bragg grating (FBG) generates single-frequency radiation with single polarization; the linewidth is ~3 kHz and the output power is 170 µW at a pump power of 450 mW. The laser with a linear cavity configuration formed by the FBG and a dielectric mirror, which has a length of the active medium of 1.3 cm, also demonstrates single-frequency radiation with a linewidth of ~1 kHz and an output power of 1.08 mW at a pump power of 400 mW. As far as we know, these lasers have record-breaking short cavity lengths in their classes with the spectral and power characteristics suitable for a wide range of applications.