Even though the first edition was published decades ago, the principles remain untouched. Here is what modern photonics engineers learn from Laud:
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. laser and nonlinear optics by bb.laud PDF
If Part I is about generating coherent light, Part II is about manipulating that light to create new frequencies and effects. This is where B.B. Laud truly shines. Even though the first edition was published decades