• Clarkson, William
• Barua, Pranabesh
• Burns, Mark
• Shardlow, Peter
• Jefferson-Brain, Thomas, Lewis
• Sahu, Jayanta Kumar

Abstract

<p class="OSAAbstract">High power, short-wavelength operation of a thulium-doped silica fiber laser at 1726 nm has been demonstrated in a core-pumped monolithic (all-fiber) resonator configuration, in-band pumped by a high power erbium-only fiber laser operating at 1580 nm. The thulium fiber laser yielded 46.7 W in a single-spatial-mode output beam for 65 W absorbed pump power. The corresponding slope efficiency with respect to absorbed pump power of 79.8% compares favorably with the theoretical maximum (Stokes) efficiency of 91.5%. The prospects for further scaling of single-mode power in this wavelength regime to &gt;100 W are considered, as well as the potential applications for high power lasers operating in this difficult-to-reach wavelength band.</p>

Topics

• Thulium
• Erbium