[r-johnv]

https://en.wikipedia.org/wiki/List_of_laser_types

Wavelengths of commercially available lasers. Laser types with distinct laser lines are shown above the wavelength bar, while below are shown lasers that can emit in a wavelength range. The height of the lines and bars gives an indication of the maximal power/pulse energy commercially available, while the color codifies the type of laser material

[mahirsaid]

That's a better break down thank you.

[jacquesm]

Funny, I posted the same link yesterday.

https://news.ycombinator.com/item?id=46968701

[nextaccountic]

Why is there no xray or gamma ray lasers?

[GJim]

Try reflecting X-rays or gamma rays and you will understand why.