Final answer:
A laser that produces intense green light through a KTP crystal is a doubled Nd:YAG laser, which uses optical pumping and a crystal to double the frequency of the light.
Step-by-step explanation:
The laser being referenced, which produces intense green laser light through a KTP crystal, is typically known as a doubled Nd:YAG laser. This type of laser uses the neodymium yttrium aluminum garnet (Nd:YAG) as its lasing medium which, when doubled through a KTP (potassium titanyl phosphate) crystal, emits green light. The process involves optical pumping where energy is put into the lasing medium, leading to a population inversion. Then the emission of radiation is stimulated, and the light is made to pass through the KTP crystal, resulting in the frequency of the light being doubled, thus producing green laser light at 532 nm.