Narrow linewidth power scaling and phase stabilization of 2-μm thulium fiber lasers

Gregory D. Goodno; Lewis D. Book; Joshua E. Rothenberg; Mark E. Weber; Stanley B. Weiss

doi:10.1117/1.3631869

1 November 2011 Narrow linewidth power scaling and phase stabilization of 2-μm thulium fiber lasers

Gregory D. Goodno, Lewis D. Book, Joshua E. Rothenberg, Mark E. Weber, Stanley B. Weiss

Author Affiliations +

Optical Engineering, Vol. 50, Issue 11, 111608 (November 2011). https://doi.org/10.1117/1.3631869

Abstract

Thulium-doped fiber lasers (TFLs) emitting retina-safe 2-μm wavelengths offer substantial power-scaling advantages over ytterbium-doped fiber lasers for narrow linewidth, single-mode operation. This article reviews the design and performance of a pump-limited, 600 W, single-mode, single-frequency TFL amplifier chain that balances thermal limitations against those arising from stimulated Brillouin scattering (SBS). A simple analysis of thermal and SBS limits is anchored with measurements on kilowatt class Tm and Yb fiber lasers to highlight the scaling advantage of Tm for narrow linewidth operation. We also report recent results on active phase-locking of a TFL amplifier to an optical reference as a precursor to further parallel scaling via coherent beam combining.

©(2011) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

Gregory D. Goodno, Lewis D. Book, Joshua E. Rothenberg, Mark E. Weber, and Stanley B. Weiss "Narrow linewidth power scaling and phase stabilization of 2-μm thulium fiber lasers," Optical Engineering 50(11), 111608 (1 November 2011). https://doi.org/10.1117/1.3631869

Published: 1 November 2011

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