This article is cited in 19 papers

Optical fibres, lasers and amplifiers. Properties and applications

Supercontinuum generation in thulium-doped fibres

A. S. Kurkov^a, V. A. Kamynin^a, V. B. Tsvetkov^a, Ya. È. Sadovnikova^b, A. V. Marakulin^c, L. A. Minashina<sup>c

a</sup> Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow
^b Moscow State University of Instrument Engineering and Informatics
^c Russian Federal Nuclear Center E. I. Zababakhin All-Russian Scientific Research Institute of Technical Physics, Snezhinsk

Abstract: Supercontinuum generation in thulium-doped fibres under pumping at 1.59 μm is investigated. Amplification of supercontinuum in the range of 1.8--2.0 μm is found for a fibre doped to a level of 2 × 10¹⁹ cm^-3. For a fibre with an activator concentration of 2 × 10²⁰ cm^-3 amplification is also observed in the (2.1 — 2.45)-μm band, which suggests the occurrence of the ³H₄ → ³H₅ optical transition in the fibre. The occupation of the ³H₄ level can be explained by cooperative effects.

Keywords: supercontinuum generation, optical fibre, thulium ions.

PACS: 42.81.Dp, 42.65.Dr, 42.65.Ky, 42.55.Wd

Received: 04.07.2012

 English version: Quantum Electronics, 2012, 42:9, 778–780

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