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Power broadening is an effect whereby the line-width of a laser is broadened by the laser intensity itself. Higher laser intensity leads to a larger line-width. This can be explained by considering the decay rate of atoms from the upper to lower laser level. As the laser intensity increases, this decay rate (which is linearly related to the line-width) increases due to stimulated emission.

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Power broadening in lasers refers to the phenomenon where the linewidth of the laser output is broadened as the output power increases. This is due to the nonlinear effects that become more pronounced at higher power levels, causing the spectral width of the laser light to widen. It can affect the coherence and stability of the laser beam.

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Q: What is power broadening in lasers?
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