Abstract
Frequency up-conversion in optical fibers has attracted much attention recently. Rare earth doped silica or fluoride fibers have been shown to efficiently convert IR into visible light. In this case the frequency of the up-converted light as well as the efficiency of the process depends on the impurity ion imbeded in the fiber core. We report here some experimental results of a different process ocurring in silica based telecommunications single mode fibers irradiated with a Q-Switched and mode- locked Nd:YAG laser light at 1.064µm. For input peak powers above~5 kW, visible light was observed after a few meters of fiber, together with a broad infrared Raman spectrum generated by the intense 1.064µm laser light.
© 1992 IQEC
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