Laser rods are used as laser media and active media in the generation of a laser beam through stimulated emissions. Non-linear optical (NLO) crystals are used in frequency conversion.
Protective laser windows are used in high-power laser material processing, in particular. Protective windows protect pricy laser optics against damage from material splatter.
Conversion screens, also known as sensor cards, make invisible laser radiation visible. They are held as sensors directly in the laser beam. There are versions available for low, medium, and high power lasers.