This compilation introduces readers to a broad cross-section of topics, from the basics of guided wave optics and nonlinear optics to biophotonics. Written by leading experts in optics and photonics, it combines fundamental principles and recent advances in one volume, including coverage of soliton dynamics, supercontinuum generation, fiber-Bragg-grating writing techniques, plasmonics, nonlinearity in stratified media, and more. The book offers a valuable overview of the field for students and researchers alike and identifies directions for future research in guided wave and photonic device technology.