Lasers and Non-Linear Optics is a comprehensive academic text widely used by advanced undergraduate and graduate students in physics and engineering. It bridges the gap between fundamental laser physics and the complex field of nonlinear optical phenomena. Core Content & Structure

Detailed Reference Lists: The book includes extensive, alphabetically ordered bibliographies at the end of each edition to facilitate independent research.

Comprehensive Laser Taxonomy: It provides detailed working principles for a wide range of systems, including: Solid State: Ruby, Nd:YAG, and Neodymium glass lasers.

2. Google Books Preview

While not a full PDF, Google Books often hosts scanned previews of older editions of Laud’s work. This is useful for cross-referencing specific equations.

• Second-harmonic generation (SHG): Laud explains basic phase matching: in a nonlinear crystal the fundamental and second-harmonic waves must remain in phase to build up energy coherently. For a 1064 nm Nd:YAG pump in a birefringent crystal, small angular tuning or temperature changes can restore phase matching — an experimental knob emphasized in the book.
• Kerr lensing and mode locking: The text sketches how an intensity-dependent refractive index (n = n0 + n2 I) produces self-focusing in the cavity, which can be exploited as a fast saturable-absorber surrogate to produce femtosecond pulses. Laud’s back-of-the-envelope estimates for the nonlinear length versus cavity length clarify when Kerr-lens mode locking is feasible.
• Four-wave mixing (FWM): The book shows how two pump photons and a signal photon can produce an idler via χ(3) interactions, and why phase matching (or near-degenerate frequency relations) matters. Laud’s example calculations for gain and bandwidth help predict whether FWM will be observable in optical fibers or bulk media.
• Pulse propagation and group velocity dispersion (GVD): Laud walks through how GVD broadens ultrashort pulses and how the interplay of dispersion and nonlinearity yields solitons. He provides formulae for dispersion length and nonlinear length so you can tell if a pulse in a fiber will disperse or self-shape.