Abstract
We demonstrate a Raman fiber laser with an operating wavelength of and record output power of . 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 while preventing further unwanted scattering to .
© 2010 Optical Society of America
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