In conclusion, "Laser and Nonlinear Optics" by B.B. Laud is a comprehensive textbook that provides a detailed analysis of the principles of lasers and nonlinear optics. The book is a valuable resource for students, researchers, and professionals in the field of optics and photonics. The PDF version of the book offers a convenient and accessible way to explore the subject matter. Whether you are a student, researcher, or professional, this book is an excellent resource to learn about laser and nonlinear optics.

| Feature | | Boyd - "Nonlinear Optics" | Shen - "The Principles" | | :--- | :--- | :--- | :--- | | Target Audience | B.Sc/M.Sc (Beginner) | Ph.D / Researcher (Advanced) | Researcher (Theoretical) | | Mathematical Rigor | Moderate | High | Very High | | Laser Coverage | Extensive (50% of book) | Minimal (Assumed known) | None | | Practical Examples | Ruby, He-Ne, Diode lasers | Crystals, Fiber optics | Purely theoretical | | Cost (Approx.) | Low ($20-40) | High ($100-200) | Moderate ($80) |