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FrozenGate by Avery

445nm and 473nm Laser Diodes

S

spark001uk

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Jun 12, 2008
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Any idea if 445 and 473nm diodes are being utilised in any products yet?

Be a while before we can afford them though I imagine, $2800 for an engineering sample of an NDB7112E 500mW 445nm diode from Nichia apparently!
At least there'll be no "IR" arguments like there are with DPSS!

Look the datasheets up HERE, in particular the NDB7112E. So will this mean simply adding a suitable driver and a collimating lens and that's it then?
 





I haven't heard of 473nm diodes, but I know the 445s are in limited production. Were getting a 200mW unit at one of my labs as soon as the company gets it all calibrated and set up for us. I'm guessing it cost around $20k though. I don't think they will be used for anything in mass production until laser TVs go mainstream. 405 is better for optical storage media so the 445 and/or 473 wont be usd for that. There may be some other consumer based uses I'm not thinking of as well.
 
Follow my link to the datasheets, see what you think? (the 473 is only up to 50mW i think, but in 445 there's a 500mW)
 
Ouch 2800$...steeep...maybe time for a second mortgage :P 445nm at 500mw *drool*


brtaman
 
Multi-longitudinal mode. That is not the same as multi transverse mode if that's what you are thinking of. It will still be a regular diode dot.
 
Oops. I suppose I should have looked at the data sheet before opening my mouth. I wonder if they are calling it multi transverse because of the oblong shape which would be a lot like TEM00 and TEM01 together. Guess we'll hvae to convince someone to for out the $2800 to buy one and find out.
 
Ok let's take a vote, who's the most loaded here? And also has a VERY good antistatic strap!! :D
 
Calm down. That just isn't very practical, and would never happen. I'm guessing the oblong shape is describing the dot like how our infamous 650 & 405 diodes don't make a perfect circle. I'm sure it could be made to be round but it would I imagine it would by clipping the beam by passing it through a perfect circle cut out. It would be better to leave it oblong so it would have more photons! I seriously doubt that a LD direct could be anything other then TEM00.
 
Ace82 said:
Calm down.  That just isn't very practical, and would never happen.  I'm guessing the oblong shape is describing the dot like how our infamous 650 & 405 diodes don't make a perfect circle.  I'm sure it could be made to be round but it would I imagine it would by clipping the beam by passing it through a perfect circle cut out.  It would be better to leave it oblong so it would have more photons!  I seriously doubt that a LD direct could be anything other then TEM00.  
Click to expand...

Its actually not possible to reshape a beam that way because of diffraction. However, there are anamorphic prisms that do the job - they're just VERY expensive.
 
As far as 473nm laser diodes go. I think the only hope in the product market bringing the price down(or at least create a higher demand) would be laser projection. The use of Red, Green, and Blue lasers.

http://www.microvision.com/
 
I doubt we'll see anything about laser projection until laser TV's become more mainstream.
 
Anything other than red/green pointers would probably distract the audience too much to actually get the message across. And I don't see why businesses would want to pay $$$$ for a blue pointer, when they could buy a red/green pointer for $$.
 
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