why are commercially available lasers almost always red?

Question

why are commercially available lasers almost always red?

In: Technology

Answer 1

Many times a red gas laser will be a helium neon laser. The frequency cannot be easily altered because of atomic properties , so we have to deal with it.

Another used color is green at 532 nm, which is always a Nd YAG laser which operates at 1064 nm which you cannot see but it goes through a frequency doubler so it becomes the classic green color.