Re: green HeNe lasers

[Dean Baird <dbaird@JPS.NET>]

HeNe produced red (primarily), yellow, and green (to lesser extents). Usually,
the end mirror filters out all but the red. The expense of the greenies
is the mirror (dielectric depositing, etc.) to filter out all but the green.
Same with yellow. They must also start out with more power, since most
of the energy goes into producing the red.

At least that's my understanding of it.

Dean Baird
Rio Americano HS, Sacramento
Dean Baird's Phyz Home Page