Optics light and lasers : the practical approach to modern aspects of photonics and laser physics Light rays Wave optics Light propagation in matter Optical images Coherence and interferometry Light and matter The laser Laser dynamics Semiconductor lasers Sensors for light Laser spectoscopy Nonlinear optics I: optical mixing processes Nonlinear optics II: four wave mixing APPENDIX: A: Mathematics for optics B: Supplements in quantum mechanics