Parametric stimulated Raman scattering with solid hydrogen

We investigate solid hydrogen as a nonlinear optical medium. We carry out s timulated Raman scattering (SRS) experiments using a large Raman coherence prepared with two single frequency pulsed lasers. We show that multiorder S RS generation proceeds collinearly to the pump beam axis without stringent restriction of phase matching. We show also that the SRS generation dominan tly occurs for negative two-photon detuning for which the Raman coherence c an follow the antiphased state coherence.