Question about diode lasers and DPSS lasers

Hi all, I own some lasers but don't know exactly how they work. I'm really interested in it, so here are some questions I hope somebody can answer

1. What is so special about "laser-light" why it can be focused so massive?
2. How does DPSS lasers work? I know there is a IR diode inside and some crystals right? What do the do?

I've googled but I found only much of stuff I don't understand.

Cheers :beer:

Laser light is essentially a one, single wavelenght of light, while other sources produce a bunch of wavelenghts.

Laser diode produces one single wavelenght. If that wavelenght is what you want, you focus it into a beam and call it a day. Boom, direct diode system.

Now, if the desired wavelenght does not exist, such as 532nm, in a diode - you use workaround which involves an IR diode, and a set of crystals which convert the wavelenght into what you want. Such system if far more inefficient and more difficult and expensive to produce then diode lasers.

So there's that. There's ton of information everywhere, you just need to know what exactly to look for. Searching for "DPSS lasers" will msot likely take you to a bunch of places selling them. However, searching for "Nd:YAG / Nd:YVO4 and/or KTP / LBB / LBO crystals" will most likely land you some info

Thanks So if IR light gets throught such a crystal there comes anoter wavelenght out?
(sounds like black magic xD )

Okay i found something thank you!