3. Quantum-Mechanical Theory of the Nonlinear Optical Susceptibility 4. The Intensity-Dependent Refractive Index 6. Nonlinear Optics in the Two-Level Approximation 7. Processes Resulting from the Intensity-Dependent Refractive Index
1. The Nonlinear Optical Susceptibility; 2. Wave-Equation Description of Nonlinear Optical Interactions 5. Molecular Origin of the Nonlinear Optical Response