First try to establish a population inversion.

• How many energy levels do you need?
• Which energy level do you need to pump?
• Do any of the energy levels have to be metastable?
• Does adjusting the energy level and the wavelength of the pump photons and the emitted photons change the ease with which you can achieve a population inversion?
  

Configure your atoms' electronic energy levels Lamp Control Lifetime Litetime Energy (ev) 2 2 1 2 -Energy Levels 2 3 Two O Three 2 Options Lamp View Enable mirrors Photons Beam Laser Power Lower Transiti... Internal Display photons O Photons Power emitted from upper Lasing Dangerl energy state Wave view Output Power Reset All