Expensive blue was yesterday :)

[m0f]

Wow, great news. But I'm feeling confused, don't know if this news makes me happy or not, having just scraped all my pennies together for my first blue at 473nm a month back

This does have me thinking about a couple of flank projectors, and I haven't even finished the build yet, and definitely haven't recovered financially yet lol.

Also, as I've got my green dialed back a fair amount, I could use a bit more oomph in the blue. Someone mentioned combining 473 and 445 ? Could this be done via standard pbs ? or would an expensive dichro be needed ? I've got a flexmod and tec laying around, this sounds promising for sure.

I think i've got the bug now

[Xytrell]

Does the projector diode assembly have a TEC?

[flecom]

Also, as I've got my green dialed back a fair amount, I could use a bit more oomph in the blue. Someone mentioned combining 473 and 445 ? Could this be done via standard pbs ? or would an expensive dichro be needed ?

if you have a single 473 and a single 445 you can do this via a standard PBS... its been done here

[Stoney3K]

My understanding is that a GaN green diode was first demonstrated last year...

http://www.i-micronews.com/news/Sumitomo-claims-world’s-green-laser-diode-bulk-GaN-crystal,3330.html

I also read recently that a US company KAAI is commercialising green GaN diodes and demonstrated these at CES earlier this year.

Yikes. That would mean DPSS is soon to be quite history. Currently that diode is running pulsed operation, nothing said about CW yet, but a projector with all direct-injected diodes would seriously dominate the low- to mid-end market.

High-end users would probably stay with DPSS or go for OPSL because of better beam characteristics.

if you have a single 473 and a single 445 you can do this via a standard PBS... its been done here.

Doesn't Laserwave have reflect 473, pass everything else dichros in stock?

If these diodes pick up, I guess there will be more demand for reflect 445 dichros anyway.

[Diachi]

Doesn't Laserwave have reflect 473, pass everything else dichros in stock?

If these diodes pick up, I guess there will be more demand for reflect 445 dichros anyway.

Yeah, but they'll reflect across a wider range of blue wavelengths other than just 473nm.

[rangedunits]

IF i only knew how to build one...

[norty303]

Can anyone suggest an option for decent, reliable, adjustable, analog modulation drivers for these diodes please

Glad someone suggested the Flexmods, I ordered 2 myself yesterday and wasn't too sure if it was the right thing!

Hope he's got a few in stock, I guess there'll be a bit of a rush on these....

IF i only knew how to build one...

I think you've just got to do it - I've never done one but I'm sure I'll be able to get the components together and assemble them and test with the help of the forum. Then the next ones will be a breeze, but you gotta lose your virginity sometime!

[badger1666]

hey norty
where are you in east sussex ?? pm back
i could always show you whats what
and dont forget when you start tinkering around you must be wearing an anti static band
or theres a good chance its bye bye diode,
i am near gatwick if you ever need help

Glad someone suggested the Flexmods, I ordered 2 myself yesterday and wasn't too sure if it was the right thing!

Hope he's got a few in stock, I guess there'll be a bit of a rush on these....



I think you've just got to do it - I've never done one but I'm sure I'll be able to get the components together and assemble them and test with the help of the forum. Then the next ones will be a breeze, but you gotta lose your virginity sometime!

[norty303]

I'm in Eastbourne so not too far away from you. It might be worth a run up to see you with the bits when the time comes, just to be clear before I go and inevitably break something!

[DMills]

Possibly a very silly thought, but does anyone know if it would be reasonably possible to fabricate a "Lens Duct" that would directly couple to the front of the diode mounting assembly as found directly in the projector.

I am thinking an acrylic wedge that is shaped and coated to have total internal reflection and that narrows to a maybe 1mm point that is AR coated.

The front face of the duct could have a bank of fast axis correction optics cast right into it...

Yea divergence out the narrow end of the duct would suck, but at that point you have a smallish source equal in fast and slow axis divergence, for that there are lenses.

Just a thought.

Regards, Dan.