What is a function of a beam stop or attenuator?

A beam stop or attenuator is specifically designed to manage the intensity of a laser beam. Its primary function is to reduce the beam intensity to a level that is below the Maximum Permissible Exposure (MPE), which is critical for ensuring safety in environments where lasers are used. By attenuating the beam, the risk of causing eye or skin injuries to personnel working in proximity to the laser is minimized.

Understanding the MPE is essential in laser safety practices; it defines the limit of exposure to laser radiation for humans in a specific wavelength and pulse duration. When the intensity is successfully reduced below this threshold using a beam stop or attenuator, it allows for the safe use of lasers in various applications, such as research, manufacturing, and medical procedures.

The other options do not align with the primary role of a beam stop or attenuator: they do not serve to increase intensity, direct the beam elsewhere, or broaden coverage. Instead, the focus is on attenuating, thereby promoting safety in laser operations.