Denis Hall & P.E. Jackson 
The Physics and Technology of Laser Resonators [PDF ebook] 

Comprehensive yet concise, The Physics and Technology of Laser Resonators presents both the fundamentals and latest developments in laser resonator technology, including specific case studies. The book covers various types of resonators, including unstable, ring laser, and multifold laser. It also discusses numerical resonator calculations and laser beam analysis. This reference will be of value and interest both to newcomers to the field and to professional engineers wishing to update their knowledge.