Green Lasers

[cheesewhiz]

Have any of you guys seen these things? I was at an outdoor rave a couple weeks ago and saw them. I just thought they were overpriced lasers because of the color, but they're freakin cool.. it was a bit foggy and you could see the whole beam.. and it shined forever

where can i buy these things for less than 150 bucks? hehe
and when can i get my blue laser?

 

[sharkeeper]

Green lasers are still very expensive because they are based on Diode Pumped Solid State Frequency Doubled (DPSSFD) laser technology. The wavelength of the DPSSFD lasers is 532 nm based on the intracavity frequency doubling a Nd:YVO4 (vanadate) chip using a KTP crystal inside the laser cavity. Their output may either be CW or quasi-CW. You can tell which you have by moving the spot rapidly across a screen - the trace from the quasi-CW type will break into discrete spots.

Decent CW ones can be found for $250 ish on ebay. Beware of cheaper ones that may actually be dangerous! The IR section (if the unit is disassembled) is producing strong IIIb output that's quite hazardous to the eyes because it's hardly visible.

Green has the best visibility of any wavelength. Blue will look dimmer at the same power output. Green and even Blue VLD's are on the way but are going to be very expensive for a while.

Cheers!

 

[EvilYoda]

word.

 

[yakko]

I have been to a couple raves where they had a green laser. It was just a little 60 watt one though.