I don't understand the reason to build one with thos prices.:yabbem:
"Actually the "green laser diodes" are more of a blue green than a true green like DPSS.
They are ~510nm compared to 523nm. There have been some more recent breakthroughs but true green efficiency is "very poor" due to the complexity of the diode."
I bet you that this is way more than what was being asked. This member is very new and still unwise to many things here. There have been many postings that have answers easily accessible. If he was actually asking about the diode version versus the DPSS versions I would be surprised.
But I won't say that it is all bad because I just learned something new by reading this thread ! I love learning about the chemistry and manufacturing side of things.
There isn't a market for these diodes as they are lossy, poor output for input energy and OVERLY complex to make. There is also a shortage of rare earths needed to make the substrate at the moment to boot.
-- 1% efficiency for a green LD vs 6% or there abouts for a DPSS ( green) laser. Make your pick.
Actually the "green laser diodes" are more of a blue green than a true green like DPSS.
They are ~510nm compared to 523nm. There have been some more recent breakthroughs but true green efficiency is "very poor" due to the complexity of the diode.
There isn't a market for these diodes as they are lossy, poor output for input energy and OVERLY complex to make. There is also a shortage of rare earths needed to make the substrate at the moment to boot.
-- 1% efficiency for a green LD vs 6% or there abouts for a DPSS ( green) laser. Make your pick.
I don't think your comment about the lack of a market is accurate. There is a big market for green laser diodes in the media projection field. Picos and small integrated projectors are all waiting on these diodes. Lasers have an advantage over LEDs in that the focusing mechanisms required (or rather not required) for laser projection allow size optimizations.
I suppose it's fair to say "Ok, but the projector industry is not itself a huge market, like, say optical drivers are". To which I would comment that I've never seen our normal 445s used outside of projectors, and yet there's clearly a viable market for 445s.
Also, where did you get your 1% efficiency for a green LD figure? I can't point to any literature to back this up, but you've got to be wrong. No?
These "upcoming" green diodes are generally rumored to be around 50mW. At 1% efficiency, you would be pumping 5W of power into them. Assuming a Vf of even 5V, that's a full 1A of current going in for 50mW of output. That just seems very questionable to me.
Yea I believe they run on just 200mA, I don't recall the voltage tho. Also they will have a ton of uses for sure.
That's why they're still in labs and not on store shelves.