Search Results (4 total)

We study a generalized notion of two-mode squeezing for the Stokes and anti-Stokes fields in a model of a cavity Raman laser, which leads to a significant reduction in decoherence or quantum noise. The model comprises a lossless cavity with classical pump, unsaturated medium, and arbitrary homogeneous broadening and dispersion. Allowing for arbitrary linear combinations of the two modes in the definition of quadrature variables, we find that there always exists a combination of the two output modes that exhibits quadrature squeezing with noise reduction below the vacuum level. The number of noise photons for this combination mode is proportional to the square root of the number of Stokes noise photons.

Anomalous pump-depletion reversal in stimulated Raman scattering has been observed and is interpreted as the development of a soliton induced by a random phase shift in the injected Stokes beam. The experimental findings are presented and compared with the analytical solutions to the undamped stimulated Raman scattering equations as well as with a numerical study of the damped equations.

The cross section for anti-Stokes Raman scattering from inverted atomic iodine is calculated by a semiempirical procedure and shown to be dominated by the quadrupole component. Relative intensities for F₂-F₁ transitions F₂ and F₁ are the total angular momenta of the initial and final hyperfine split states) in the hyperfine split multiplets are calculated, and maximal intensity of 25% is found for the 2-4 transition. However, in stimulated Raman scattering maximal gain is expected at the position of the 3-2 line, where collisional broadening and Stark splitting lead to a strong overlap of three lines. The resulting effective cross section is about 33% of the total cross section. For scattering with pump radiation at λ=1.06 μm an effective cross section of dσ / dΩ=0.71×10^-28 cm² is obtained, with an estimated accuracy of 20%. This is somewhat lower than the estimate dσ / dΩ=10^-28 cm² which has been published recently.

We propose and analyze an experiment designed to probe the extent to which information accessible to an observer and the "eraser" of this information affects measured results. The proposed experiment could also be operated in a "delayed-choice" mode.