Indeed i do, and read i will... i like to try to understand a bit more about the science behind things but in all honestly colour is way more complex than we as infants are taught.You have some reading to do my friend.
Sam's Laser FAQ - Preface, Introduction, What is a Laser?, Safety
It isn't necessarily the color of the cyrstal, or the *gas*, etc. It's a function of chemistry and physics.Am i right in assuming it has something to do with the colour of the crystal placed at the front of a diode?... The wavelength of the DPSSFD lasers is 532 nm based on the intracavity frequency doubling of a Nd:YVO4 (vanadate) chip using a Potassium Titanyl Phosphate, KTiOPO4 (KTP) crystal inside the laser cavity... if these are the compounds used to produce green... then why arnt we seeing a mixure of the other compounds used for other colours, Eg: what ever compounds used for blue / whatever compounds used for red = Pink?
Good *basic* answer but don't forget DPSS. I'm in NO WAY any expert but it is quite complex.*Basic* answer for a *basic* question;
There are some compounds in nature that *can* produce laser radiation *under the right circumstances*. But not EVERYTHING can produce a laser beam.
Seawater doesn't produce laser beams. Neither does coffee (although I WISH it did, I drink enough of the stuff). Common glass doesn't "lase". But believe it or not, some organic material found in jellyfish apparantly "lases":
If you took a ruby laser, but replaced the ruby with a rod of quartz, it wouldn't produce a laser beam, because quartz doesn't "lase", at ANY color. But when ruby "lases", it "lases" red.
Infrared (808 nanometers) laser diodes use aluminium gallium arsenide(GaAlAs). Most of the blue (445nm) lasers and also the violet (405nm) use indium gallium nitride(InGaN). Cheap red laser pointers use Aluminium gallium indium phosphide (AlGalnP). Those compounds all produce lasers at SPECIFIC colors. BUT; replace any of those diode components with, say, a grain of SALT, and then it would NOT make a laser.
So; only specific things "lase". And they all "lase specifically" at "their" color. But there are always new discoveries. They might find a NEW compound for a NEW shade of blue. Or a CHEAPER compound for an already existing color.