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FrozenGate by Avery

473nm Blue Modules

Gryphon said:
$400......hmmm, i think for that i will just buy a complete build rather than risking it with a module :undecided:
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$400 won't get you 10mW (could be more than that...or less). Only in the CNI GB you can get a 5mW Aquarius for $300.00 or so.

It's $400 now, $300 next year :p
 





By combining 405nm and 532nm, you don't get 473nm, you can get something close to it on the CIE diagram, but it is impossible to get 473, or any other wavelength for that matter.

The main reason for the cost in blue lasers is the crystals needed, as well as the control for the crystals. LBO is a very tough crystal to work with, if you cut it off axis by a couple degrees or even less then a degree, you will greatly decrease the efficiency at a specific temperature. LBO usually needs to be heated to a high temperature and kept there very stable.

Additionally, the gain at the secondary line on Nd:YVO4 or Nd:YAG is much lower which means you need a better cavity, this means less losses on the mirrors, and better anti reflective coatings. The yield on high reflector mirrors, is much lower and thus the lost product makes the cost higher. Antireflective coatings are the same way.
 
ZRTMWA said:
Well a 5mW CNI blue cost $315 in the GB right? I don't feel like emailing CNI but I would guess $100-$200 less than what that costs normally (non GB). Is Viasho a supplier for CNI?
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Viasho is a manufacturer, just like CNI (they are CNIs competition). They are generally considered to be slightly higher quality than CNI.
 
Laser_Ben said:
By combining 405nm and 532nm, you don't get 473nm, you can get something close to it on the CIE diagram, but it is impossible to get 473, or any other wavelength for that matter.

The main reason for the cost in blue lasers is the crystals needed, as well as the control for the crystals. LBO is a very tough crystal to work with, if you cut it off axis by a couple degrees or even less then a degree, you will greatly decrease the efficiency at a specific temperature. LBO usually needs to be heated to a high temperature and kept there very stable.

Additionally, the gain at the secondary line on Nd:YVO4 or Nd:YAG is much lower which means you need a better cavity, this means less losses on the mirrors, and better anti reflective coatings. The yield on high reflector mirrors, is much lower and thus the lost product makes the cost higher. Antireflective coatings are the same way.
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That's good info, thanks man.

For people who don't know what LBO means:

Lithium triborate - Wikipedia, the free encyclopedia
 
LBO is horribly inefficient at the wrong temperature. For example, my Spectra Physics Millennia uses a very long LBO crystal for non critical phase matching. It is one of the most efficient CW DPSS lasers out there. When pumped with 15W of 808nm at room temperature, the laser emits less then 1mW, however when the crystal is heated up to 170 degrees Celsius, the laser emits nothing more until it is within ~2 degrees of ideal at which point it shoots up to ~2W.
 
2W's of blue. Yeah that's what Niko wants.

Just stating the obvious here........
405nm + 532nm = multiline UV/Green, not ~473nm but "simulates" blue. :D
 
Exactly, however, they use the same crystal and similar cut angles to do the doubling of the IR for blue. The point is, it is difficult to make a high power module in a small size.
 
I saw the 473nm module before , it is bigger than normal 532nm , silver appearance , generate heat faster ,,, then output goes down too .
I suppose disassemble Blur-DVD or something like that to find 473nm laser module better .
 
If anything, I would contact CNI to see if they are willing to sell the modules used in the "Aquarius." They are larger than 12mm but It shouldn't be a big problem. Members here are capable of machining heat-sinks etc. to suit the module.

I was looking into building a ~50mW 445nm laser.
Unfortunately, priorities won't allow me the luxury... for the moment...
 
vinsion said:
......I suppose disassemble Blur-DVD or something like that to find 473nm laser module better .
Click to expand...


I don't really know what you are trying to say but there will never be any 473nm laser in a blueray burner. or any burner. :thinking:
 
RA_pierce said:
If anything, I would contact CNI to see if they are willing to sell the modules used in the "Aquarius." They are larger than 12mm but It shouldn't be a big problem. Members here are capable of machining heat-sinks etc. to suit the module.

I was looking into building a ~50mW 445nm laser.
Unfortunately, priorities won't allow me the luxury... for the moment...
Click to expand...

Exactly! I can imagine the "DIY 473nm 18650 KIT" by jayrob :p
 
Yeah I just recently started thinking about building my own DPSS 473nm lol. I was looking at some high end crystals that are capable of producing up to 70mW of 473nm when pumped with 2W of 808nm.
 
Well, in LBO's defense, there are two types.

Type one is much easier to work with and can phase match at room temperature and is not *quite* as picky when it comes to crystal temps

Type two requires the crystal to be heated to within a couple degrees for doubling to occur. This method is much more efficient but much more difficult to work with.

Most 473nm lasers any of us have played with will be type one,

(I may have gotten the one and two backwards, but you get the idea)
 
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