Abstract
Stimulated Raman scattering (SRS) with the effect of large longitudinal
electric field $(E_{z})$ that appears in submicrometer waveguide (SMWG) is studied.
Because of the existence of large $E_{z}$, SRS is allowed even its pump-Stokes polarization combination
seems to be forbidden by the Raman selection rules. It also suggests that
SRS is quite weak in extremely small SMWG because the mode distributes a
large part outside the waveguide core region which has no contribution to
SRS. Based on its stronger Raman gain and better performance in single mode
property and free carrier lifetime reduction, the ridge waveguide is a
better candidate than wire one to realize SRS lasing in extremely small
SMWG.
© 2010 IEEE
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