Introduction to Continuous mode of operation
Continuous-wave operation:
There are some applications in which the use of the laser depends upon the beam which has an output power that is constant over time. This type of lases is known as continuous wave (CW). There are many specialized lasers that are constructed in order to work in continuous wave mode to satisfy such an application. Many of these lasers are actually lasers in multiple longitudinal modes at the same time, and the beats of those oscillations between slightly different optical frequencies are, in fact, shorter time scales than the round-trip time (the reciprocal of the frequency) there but the dimensions produce variation difference between modes), typically a few nanoseconds or less. In the glass optical lenses industry, optical windows are fabricated with the help of industrial lasers optics.