Stimulated emission and amplification of radiation under conditions of stimulated Raman scattering in crystals

Abstract

We consider the polarization of unstable type-IIB D0-branes in the presence of a background five-form field strength. This phenomenon is studied from the point of view of the leading terms in the non-abelian Born Infeld action of the unstable D0-branes. The equations have SO(4) invariant solutions describing a non-commutative 3-sphere, which becomes a classical 3-sphere in the large-N limit. We discuss the interpretation of these solutions as spherical D3-branes. The tachyon plays a tantalizingly geometrical role in relating the fuzzy S 3 geometry to that of a fuzzy S 4 .

Stimulated Raman scattering in Nd:SrWO4

“…How- . Some of those crystals mainly tungstates were found to be very useful for the frequency conversion of either nanosecond or picosecond pulses [10][11][12][13][14][15][16][17].…”

“…Suitable crystals for Raman frequencies generation include: nitrates and calcites (as Ba(NO 3 ) 2 , NaNO 3 or CaCO 3 ), tungstates (as BaWO 4 , SrWO 4 , KGd(WO 4 ) 2 , or KY(WO 4 ) 2 ), molibdates (as SrMoO 4 , or CaMoO 4 ), iodates and niobates (as LiIO 3 , or LiNbO 3 ), phosphates (as Sr 5 (PO 4 ) 3 F) or other crystal (as NaBrO 3 ). Some of those crystals mainly tungstates were found to be very useful for the frequency conversion of either nanosecond or picosecond pulses [10][11][12][13][14][15][16][17].…”

“…Figure12 Mode-locked output of Nd 3+ :SrWO4 laser (3955 in ethanol saturable absorber); fundamental (λ = 1057 nm) and Raman (λ = 1170 nm) wavelengths (on top), and SHG (λ = 585 nm) pulse (below)…”