👉 A laser fluid, also known as an active medium for lasers, is a special type of material that combines a gain medium with an active component, such as doped ions or molecules, to facilitate the amplification of light through stimulated emission. This medium is typically a gas, liquid, or solid that can be excited to a higher energy state, creating a population inversion necessary for laser action. The active component enhances the efficiency and performance of the laser by increasing the probability of photon interactions, thus enabling the generation of coherent light at specific wavelengths. Laser fluids are crucial in applications ranging from industrial cutting and welding to medical treatments and scientific research, offering precise control over light emission.