Intracavity stimulated Raman scattering with feedback at the Stokes frequency in a laser with active mode locking. II

An experimental investigation was made of the energy and time characteristics of the Stokes radiation pulses as a function of the mismatch of a Stokes resonator relative to a laser resonator at different hydrogen pressures. An optimal dependence of the energy and duration of the Stokes pulses on the mismatch was observed. A theoretical analysis was made allowing for the phase relationships. This explained the optimum by the transient nature of stimulated Raman scattering, exhaustion of the pump radiation, and nonlinear phase modulation which appeared during energy exchange. A study was made of the time characteristics of the Stokes radiation when a change occurred in the dephasing time of induced molecular vibrations when a buffer gas (helium) was added to hydrogen.