This article is cited in 25 papers

Lasers

Effect of active-ion concentration on holmium fibre laser efficiency

A. S. Kurkov^a, E. M. Sholokhov^a, A. V. Marakulin^b, L. A. Minashina<sup>b

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

Abstract: We have measured the fraction of holmium ions that relax nonradiatively to the ground level as a result of interaction at a metastable level in optical fibres with a silica-based core doped with holmium ions to 2 × 10¹⁹ — 2 × 10²⁰ cm^-3. The percentage of such ions has been shown to depend on the absolute active-ion concentration. The fibres have been used to make a number of 2.05-μm lasers, and their slope efficiency has been measured. The laser efficiency decreases with increasing holmium concentration in the fibres

PACS: 42.55.Wd, 42.60.Lh, 32.50.+d, 36.40.-c

Received: 01.03.2010
Revised: 01.04.2010

 English version: Quantum Electronics, 2010, 40:5, 386–388

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