RF (radio frequency) laser excitation is a method of powering a laser, primarily gas lasers like CO2 lasers, by using radio frequency waves to excite the laser medium. 

The RF power module provides pulsed RF power to the lasler head to energize the laser gas mixture in the tube.

An RF (radio frequency) CO2 laser is an electrically-pumped gas laser that uses high-frequency RF waves to excite a CO2 gas mixture into producing a laser beam.

The beam passes through further precision aligned optical components which nominally collimates the beam for minimum divergence, then to an optional shutter assembly before it exits the laser system aperture.