Selective nonlinear spectroscopy of inhomogeneously broadened phonon resonances in a disordered medium
Basiev T. T., Dianov E. M., Zakhidov E. A., Karasik A. Ya., Mirov S. B., Prokhorov A. M.
Panoramic Stokes and anti-Stokes scattering spectra have been measured in glass fiber lightguides with biharmonic monochromatic pumping. The results can be used to develop tunable narrow-band subnanosecond sources which emit in the Stokes and anti-Stokes spectral regions with respect to the pump. An arrangement for a selective stimulated-Raman gain is discussed. This arrangement has yielded the first measurements of the homogeneous broadening (~ 16 cm"1) of an inhomogeneously broadened phonon vibration (v~460 cm" *) in amorphous Si02.
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![](/ps/1491/article_22771_800_head.png "<b>Panoramic Stokes and anti-Stokes scattering spectra have been measured in glass fiber lightguides with biharmonic monochromatic pumping. The results can be used to develop tunable narrow-band subnanosecond sources which emit in the Stokes and anti-Stokes spectral regions with respect to the pump. An arrangement for a selective stimulated-Raman gain is discussed. This arrangement has yielded the first measurements of the homogeneous broadening (~ 16 cm"<sup>1</sup>) of an inhomogeneously broadened phonon vibration <i>(v~460 </i>cm" *) in amorphous Si0<sub>2</sub>.</b>")