What is the typical measurement for energy used in lasers?

In the context of lasers, energy is typically measured in millijoules. This unit reflects the amount of energy delivered by the laser during a pulse or over a certain duration of operation. Millijoules are particularly relevant in laser contexts because many laser applications, such as those used in medical or industrial settings, operate with energy outputs that are relatively small and precise, making millijoules an appropriate and practical unit of measurement.

Other options, like seconds, refer to time; millimeters measure distance or optical path length; and kilowatts represent power, which is the rate of energy consumption over time. While power can relate to a laser's operation, energy measurement in a laser's application is conventionally given in millijoules, focusing on the total energy output rather than how quickly it is delivered. Therefore, millijoules provide a clearer understanding of the energy characteristics of laser treatments and their effectiveness in various applications.