Frequency pulling of stimulated Raman scattering in microdroplets

Abstract

Spectral features observed in stimulated Raman scattering from 20-μm methanol droplets at 1-GW/cm² pumping levels appeared locked in wavelength at the center of their respective gain profiles. Typically, a feature’s wavelength remained constant while the droplet size varied by as much as 0.3%. This is attributed to frequency-pulling effects caused by the presence of Raman gain. Wavelength shifts of up to ±0.5 nm in the positions of morphology-dependent resonances would explain the observations and are consistent with calculations.

© 1990 Optical Society of America

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