All-fibre single-mode small-signal amplifier operating near 0.976 μm

S. S. Aleshkina, D. S. Lipatov, T. A. Kochergina, V. V. Velmiskin, V. L. Temyanko, L. V. Kotov, T. L. Bardina, M. M. Bubnov, A. N. Guryanov, M. E. Likhachev

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


We have developed and demonstrated a polarisation-maintaining single-mode ytterbium-doped fibre for light amplification at a wavelength near 0.976 μm in an all-fibre configuration. A distinctive feature of the proposed fibre design is low losses due to fusion splices with standard single-mode fibre having a core diameter of 10 μm, which has made it possible to produce an all-fibre small-signal amplifier with a gain threshold near 3 W and a differential pump-to-signal conversion efficiency of 9.8 % in the saturation regime. The proposed amplifier has been shown to be well-suited for small-signal amplification. In particular, at an input signal power near 1 mW and a gain of 20 dB, the ratio of the amplified signal to the integrated luminescence intensity near 0.976 μm exceeds 20 dB. A 40-dB gain has been demonstrated for an ultrasmall signal of ∼10-μW power.

Original languageEnglish (US)
Pages (from-to)919-924
Number of pages6
JournalQuantum Electronics
Issue number10
StatePublished - 2019


  • Large mode area fibre
  • Ytterbium fibre amplifier
  • Ytterbium-doped optical fibre

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Statistical and Nonlinear Physics
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering


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