Abstract

Stimulated Raman scattering with 532-nm pulsed laser light is investigated in a 7.9-μm-core step-index multimode fiber. While low-intensity pump or single-mode LP01 excitation produces the usual stimulated Raman scattering light, mixed-mode (LP01 + LP02) excitation with pump intensities of ~5 kW uniformly shifts the multiorder Stokes Raman spectrum by an amount determined by fiber parameters, thus making stimulated Raman scattering tunable. This is due to the mediating influence of the four-photon mixing in the fiber.

© 1994 Optical Society of America

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