Higher Stokes Components Research Articles

Resonances of pumping and higher stokes components in fiber Brillouin lasers and a method of setting them

An algorithm is presented for setting a fiber Brillouin laser that allows simultaneous provision of the resonance of pumping and higher Stokes components. The proposed radiation source combines a low noise level and low lasing threshold characteristic of double-resonance lasers with the advantages of multifrequency optical emitters.

Four-wave parametric processes in multicascade SRS conversion of neodymium laser radiation into an eye-safe region

Four-wave parametric processes in multicascade SRS conversion of neodymium laser radiation into an eye-safe region are studied in relation to the phase mismatch of parametric coupling, which is determined by the refractive index dispersion of the SRS medium. The numerical simulation showed that the generation of multicascade SRS at a particular wavelength in the IR region can be even more efficient than the single-cascade conversion if the parametric coupling between the first Stokes and anti-Stokes components is weak and higher Stokes components are strongly parametrically coupled with each other. This situation is observed in the eye-safe IR region, where the refractive index dispersion of solid-state SRS media is minimal, which allows one to optimize the SRS conversion by choosing an SRS medium and its length.

Efficient generation of the first Stokes component of stimulated Raman scattering in a selective optical delay line

An experimental study was made of conversion of pulsed radiation of the 0.53μ wavelength to the 0.63μ radiation by stimulated Raman scattering in methane enclosed in an optical delay line. Selective coating of the mirrors used in the delay line made it possible to reduce the losses due to the generation of the second and higher Stokes components. The quantum efficiency of conversion to the first Stokes component achieved in these experiments was ~0.52.

Investigations of the angular distribution of the higher stokes components of stimulated Raman emission in benzene, carbon disulfide, and nitrobenzene

Investigations of the angular distribution of the higher stokes components of stimulated Raman emission in benzene, carbon disulfide, and nitrobenzene