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Opt Lett. 2003 Jul 1;28(13):1093-5.

High-power, low-noise, Yb-doped, cladding-pumped, three-level fiber sources at 980 nm.

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1
Optoelectronics Research Centre, University of Southampton, Southampton SO17 1BJ, United Kingdom.

Abstract

We present results on a high-power, cladding-pumped, Yb-doped fiber emitting at 977 nm in laser and ampllified-spontaneous-emission source configurations. We obtained up to 1.4 W of fiber-coupled, single-mode output power and slope efficiency as high as 68%. To our knowledge these are the highest powers efficiencies achieved from a single-mode fiber laser at approximately 980 nm and the first demonstrated results on a high-power amplified-spontaneous-emission source in this wavelength range. High power and high slope efficiency are achieved by using a high numerical aperture (> 0.7), a jacketed air-clad fiber, and a high-brightness pump source. Both types of sources exhibit relative intensity noise below -130 dB/Hz and are thus suitable for a wide range of applications.

PMID:
12879918
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