Question: which laser types is used in?
Answer: Helium Neon Laser: The first CW system was the helium neon (HeNe) gas mixture. ...  Argon, Krypton, and Xenon Ion Lasers. ...  Carbon Dioxide Laser. ...  ND:YAG Laser Systems: ...  Excimer Lasers: ...  Semiconductor Diode Lasers. ...  Other Lasers: