Raman stimulated

Pausch R, Held M, Chen T, Schwoerer H and Kiefer W 2000 Quantum control by stimulated Raman scattering J. Raman Spectrosc. 31 7... 

Unlike the typical laser source, the zero-point blackbody field is spectrally white , providing all colours, CO2, that seek out all co - CO2 = coj resonances available in a given sample. Thus all possible Raman lines can be seen with a single incident source at tOp Such multiplex capability is now found in the Class II spectroscopies where broadband excitation is obtained either by using modeless lasers, or a femtosecond pulse, which on first principles must be spectrally broad [32]. Another distinction between a coherent laser source and the blackbody radiation is that the zero-point field is spatially isotropic. By perfonuing the simple wavevector algebra for SR, we find that the scattered radiation is isotropic as well. This concept of spatial incoherence will be used to explain a certain stimulated Raman scattering event in a subsequent section. 

This is not the case for stimulated anti-Stokes radiation. There are two sources of polarization for anti-Stokes radiation [17]. The first is analogous to that in figure B1.3.3(b) where the action of the blackbody (- 2) is replaced by the action of a previously produced anti-Stokes wave, with frequency 03. This radiation actually experiences an attenuation since the value of Im x o3 ) is positive (leading to a negative gam coefficient). This is known as the stimulated Raman loss (SRL) spectroscopy [76]. Flowever the second source of anti-Stokes polarization relies on the presence of Stokes radiation [F7]. This anti-Stokes radiation will emerge from the sample in a direction given by the wavevector algebra = 2k - kg. Since the Stokes radiation is... 

Laubereau A 1982 Stimulated Raman scattering Non-Linear Raman Spectroscopy and its Chemical Applications ed W Kiefer and D A Long (Dordrecht Reidel)... 

Wang 0-S 1975 The stimulated Raman process Quantum Electronics vol 1A, ed H Rabin and 0 L Tang (New York Academic) pp 447-72... 

Wang 0-S 1969 Theory of stimulated Raman scattering Phys. Rev. 182 482-94... 

Yan Y X, Gamble E B and Nelson K A 1985 Impulsive stimulated Raman scattering general importance in femtosecond laser pulse interactions with matter, and spectroscopic applications J. Chem. Phys. 83 5391-9... 

Walsh A M and Loring R F 1989 Theory of resonant and nonresonant impulsive stimulated Raman scattering Chem. Phys. Lett. 160 299-304... 

Stimulated Raman spectroscopy is experimentally different from normal Raman spectroscopy in that the scattering is observed in the forward direction, emerging from the sample in the same direction as that of the emerging exciting radiation, or at a very small angle to it. 

Figure 9.20 (a) Stimulated Raman scattering experiment, (b) Concentric rings observed, in the... 

Figure 9.21 Transitions in the stimulated Raman effect in benzene...

In the stimulated Raman effect it is only the vibration that gives the most intense Raman scattering that is involved this is the case for Vj in benzene. 

Question. The v = I — 0 interval is 4160 for H2 and 2990 for H2. Estimate the wavelength closest to the exciting radiation from an XeCl laser of stimulated Raman shifted radiation for each of the gases. 

This Raman shifted radiation is obtained using the stimulated Raman effect (Section 9.3.2)... 

A similar calculation will show that the stimulated Raman effect applied to frequency tripled radiation from a Nd YAG laser, with a fundamental wavelength of 1064.8 nm, produces wavelengths of 299 nm, with H2, and 289 nm, with H2. 

Draw a diagram similar to that in Figure 9.21 to illustrate the stimulated Raman effect in FI2. Fligh-pressure FI2 is used to Raman shift radiation from a KrF laser. Calculate the two wavelengths of the shifted radiation which are closest to that of the KrF laser. 

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