What does the term "focused beam" refer to in laser technology?

The term "focused beam" in laser technology refers to a laser beam that has been converged to a small spot, significantly increasing its intensity. When a laser beam is focused, the light energy becomes concentrated over a smaller area, allowing for a much higher power density. This is essential in various applications, such as cutting, welding, or medical treatments, where precision and the ability to deliver high energy to a specific location are crucial.

Focusing a beam involves using lenses or mirrors to direct the light waves so that they converge at a particular point. As the energy is concentrated, the intensity of the beam at that focal point can be many times greater than that of the unfocused beam, making it more effective for tasks that require strong energy application on a targeted area. Therefore, the characterization of a focused beam as one that is converged to a small spot highlights its ability to perform tasks requiring precision and intensity, setting it apart from other beam configurations.