This article is cited in 3 papers

SELECTION OF PAPERS PRESENTED AT THE INTERNATIONAL WORKSHOP ON FIBRE LASERS (20-24 SEPTEMBER 2020, NOVOSIBIRSK)

Pump depletion in Raman lasing in a graded index multimode fibre

A. G. Kuznetsov^a, S. I. Kablukov^a, E. V. Podivilov^a, S. A. Babin<sup>ab

a</sup> Institute of Automation and Electrometry, Siberian Branch of Russian Academy of Sciences, Novosibirsk
^b Novosibirsk State University

Abstract: We examine multimode diode laser pump depletion in a graded index multimode (MM) fibre Raman laser generating a high-quality Stokes beam. Spatial 'hole burning' in the transmitted pump beam is demonstrated. A balance model is constructed for interaction of the pump and Stokes waves in the MM Raman laser. Analytical formulas are derived and used in calculations demonstrating qualitative agreement with experimental data. The origin of the observed quantitative discrepancies is discussed.

Keywords: Raman lasing, graded index multimode fibre, fibre Bragg gratings, pump depletion effect, balance model.

Received: 09.10.2020

 English version: Quantum Electronics, 2020, 50:12, 1091–1095

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