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We demonstrate record power and efficiency for 1.5micron fiber lasers using a cascaded Raman laser based on a new architecture with output power of 301W at 1480nm and optical to optical conversion efficiency of 42%.
A CW Erbium-doped fiber laser with >100W at 1554nm is demonstrated. The laser is core-pumped in-band by a Raman fiber laser with record power of >140W at 1480nm. The total conversion efficiency is ∼75%.
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