Laser Amplification

Laser amplification is the process used to increase the intensity of light in a laser system. It starts with a source of energy that excites atoms in a medium—like gas, liquid, or solid—causing them to emit light. This emitted light is then amplified through a series of stimulated emissions, where the emitted photons stimulate more atoms to release their light, creating a coherent and focused beam. A key component in making this possible is the optical cavity, which reflects the light back and forth to enhance the amplification before it exits as a powerful laser beam.