V. A. Akulov, S. I. Kablukov, S. A. Babin, “Frequency doubling of a tunable ytterbium-doped fibre laser in KTP crystals phase-matched in the XY and YZ planes”, Kvantovaya Elektronika, 2012, Volume 42, Number 2,Pages <nobr>120

This article is cited in 6 papers

Nonlinear optical phenomena

Frequency doubling of a tunable ytterbium-doped fibre laser in KTP crystals phase-matched in the XY and YZ planes

V. A. Akulov^a, S. I. Kablukov^ba, S. A. Babin^ba

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

Abstract: This paper presents an experimental study of frequency doubling of a tunable ytterbium-doped fibre laser in KTP crystals phase-matched in the XY and YZ planes. In the XY plane, we obtained continuous tuning in the range 528 – 540 nm through intracavity frequency doubling. The second-harmonic power reached 450 mW for 18 W of multimode diode pump power, which was five times higher in comparison with single-pass frequency doubling. In a single-pass configuration in the YZ plane, we obtained a wide tuning range (527 – 551 nm) in the green spectral region and a second-harmonic power of ~10 mW. The tuning range was only limited by the mechanical performance of the fibre Bragg grating and can potentially be extended to the entire lasing range of the ytterbium-doped fibre laser.

Keywords: fibre lasers, frequency doubling, KTP, frequency tuning.

PACS: 42.55.Wd, 42.65.Ky, 42.70.Mp

Received: 08.12.2011