Preface.- Theoretic Analysis and Calculation of Three-wave Interaction in Nonlinear Optical Crystals.- Nonlinear Optics Mixing Theory.- Theory and Technology of Frequency-doubling Lasers and Frequency Mixing.- Optical Parametric Oscillators (OPO).- Quasi-phase Matching Technology (QPM).- Principle, Device and Technology of DPL.- RGB-DPL and High Power DPL.- Solid Tunable Laser Technology.- Tunable Titanium Doped Sapphire Laser.- Other Laser Tunable Technologies.