| Gain In laser physics, gain refers to the amplification of light or electromagnetic radiation within the laser medium, leading to the production of coherent laser light. Gain occurs when the population of excited atoms or molecules in the laser medium exceeds the population of ground-state atoms or molecules, creating a condition known as population inversion. The gain medium, typically a solid, liquid, or gas, provides the energy necessary for the stimulated emission of photons, resulting in the coherent and monochromatic output characteristic of laser light. Controlling the gain of the laser medium is essential for maintaining stable laser operation and optimizing engraving performance in laser engraving systems. |
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