How do you focus regular light to make it a laser beam?

How to Focus your laser to make it burn « Science Experiments

Beam waist, explained by RP; focus, laser beam

Is it possible to focus multiple CW single mode laser beams using

Premium Vector Red Laser Beam Set

Features:Cu copper reflector mirror with good optics characteristics is widely used for CO2 laser engrave machine. Dielectric film reflector is a new

CO2 Laser Cutter Focus Focal Lens Laser Beam Combiner Lens Diameter 20mm 25mm for CO2 Laser Engraving Cutting Machine to Adjust Light Path and Make

Laser Beam Profiler: Definition, How It Works, and Purpose

Be Focused Like A Laser Beam Veritus Group

ATTRACT Featured Stories: High Power Laser Beam Profile And Pointing Measurement (HPLM) ATTRACT Project

Laser beam focusing - How to make Best laser focus!

How to Make a Burning Laser: 9 Steps (with Pictures) - wikiHow