"Coherence." . . "Lasers." . . "Pumps." . . "Resonance." . . "Pumping." . . "Excitons." . . . . "Lasers and masers." . . "WASHINGTON STATE UNIV PULLMAN Dept. of CHEMISTRY." . . "Test and evaluation." . . . . . . . . . . . . . . . . . . "The nonlinear optical susceptibility is calculated for a system of two closely located bound excitons by treating the test field as a perturbation in pump-probe experiments. The coherence of the superradiance effect on the spectral hole burning is found to be dramatic in the transient regime for both on-resonance and off-resonance pumping."@en . . "Cooperative Effects on Transient Spectral Hole Burning"@en . "Combustion." . . "Probes." . .