Abstract

We demonstrate a Raman fiber laser with an operating wavelength of 1480nm and record output power of 81W. High-power operation is enabled by a long-period grating used to frustrate backward lasing at the Stokes wavelength in the Yb-doped fiber amplifier. A cascaded Raman fiber with a long-wavelength fundamental mode cutoff enables efficient multiple Stokes scattering from 1117 to 1480nm while preventing further unwanted scattering to 1590nm.

© 2010 Optical Society of America

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