Nonlinear light transformations were observed in a nitrogen-doped silica fiber pumped with a Nd:YAG laser (λ=1.06 µm) . Light generation in the spectral range 355–430nm was obtained with an efficiency of up to 2×10<sup>-4</sup> . The UV light was found to be the result of third-harmonic generation, stimulated Raman scattering of the third harmonic, and third-harmonic generation from the Stokes components of the pump light. Lasing based on the color centers of nitrogen-doped silica was observed in the range 380–430nm.
© 1997 Optical Society of America
I. A. Bufetov, M. V. Grekov, K. M. Golant, E. M. Dianov, and R. R. Khrapko, "Ultraviolet-light generation in nitrogen-doped silica fiber," Opt. Lett. 22, 1394-1396 (1997)