The process where an incoming photon triggers an atom to drop to a lower energy state, releasing a second, identical photon.

: Covers nonlinear frequency conversion as it relates to extending laser capabilities. Unique Properties of Lasers Laser Fundamentals William T Silfvast PDF - Scribd

) expanded on the original with new chapters on laser amplifiers and detailed sections on solid-state and semiconductor lasers. Core Content Overview

Provides specific technical descriptions for approximately 20 common laser types, including solid-state, semiconductor, and gas lasers. Laser Fundamentals - Amazon UK