Optical power refers to the amount of energy carried by light waves per unit of time. It is typically measured in watts (W) and indicates how much light energy is emitted, transmitted, or received by an optical system. This concept is crucial in various applications, including lasers, fiber optics, and photovoltaic cells, where understanding the intensity of light is essential for efficiency and performance. In practical terms, optical power can influence how well devices like cameras or solar panels function. For instance, higher optical power in a laser can result in a more intense beam, which is useful for cutting materials or in medical procedures. Conversely, in fiber optics, managing optical power is vital to ensure signal clarity over long distances.