New Colossal UV Laser Diode - Nuvoton KLC432FL01WW - 3.3W 405nm and Beyond!

[Shmackitup]

Just did some testing on these new diodes I got and all I've got to say is H*LY SH!T!!! (pardon my punctuation)

These are rated for 3.3 watts @2.2 amps but they go much farther than that. I pushed one up to 5.5A and it didn't kill it. My LPM read over 8.2 watts of glorious violet photons. The un-collimated beam looks just like any other high power multi-mode and the divergence is very similar when collimated. The spectrum spread was from sub 400nm up to over 407nm.

Here's a video and some pics for your viewing pleasure:

New Colossal UV Laser Diode - Nuvoton KLC432FL01WW - 3.3W 405nm

Rated for 3.3W Output @2.2A but it keeps going and going and going and going!!! www.barnettunlimited.com

rumble.com

Nuvoton KLC432FL01WW

Nuvoton KLC432FL01WW - 3.3W+ 405nm Laser Diode

ibb.co

 

[Gryphon]

I've been eying these diodes but never in my wildest dreams did I think it would go that crazy. And here I thought the 2W from the GH04W10A2GC was impressive, this thing is in another league!

 

[kecked]

How much do they cost? Bad typing.

 

[Gryphon]

How. I have are they?

Are you okay?

How much do they cost? Bad typing.

LaserTree has them for $560, I'm wondering if he managed to get them cheaper than that because that's a lot for a single diode

 

[Shmackitup]

They were close to $500/ea. Definitely the most expensive diodes I've ever bought!

 

[Ricker]

 

[Ricker]

That is a super-spre...burner event. Must wear your mas... laser safety glasses!

 

[RedCowboy]

560.00 for basically a nubm in a less visible wavelength...... how's that ever going to sell ?

 

[Shmackitup]

560.00 for basically a nubm in a less visible wavelength...... how's that ever going to sell ?

Oh, it will sell....

 

[RedCowboy]

How do you figure ??

Granted 405nm is a graveyard groovy color and maybe it will burn a little better, but how can you think it will be worth that much over the existing 450nm diodes available for 1/10 the price ?

If it was single mode then you would have my attention, but same divergence as nubm44/08/0A/0E and overdriven 300% so MTTF ???

I can knife edge a few 2W 405's with much better divergence for a lot less $$$

 

[CurtisOliver]

Two words... Laser pumping

These would be amazing for visible pumped laser crystals that are optimal at those wavelengths. Agreed, you could knife edge lower powered diodes, but the form factor would obviously be larger.

 

[RedCowboy]

I am ignorant as to what you can pump with 405nm other that phosphors, now I know there are other uses in bio-medical/fluorescence and material curing but what chemical compound or crystal can you pump with 405nm and what will you get ?

Answering my own question somewhat I found this below, but is there something new/special that I am missing ? Something with a high return maybe ?

405-nm pumped Ce³⁺-doped silica fiber for broadband fluorescence from cyan to red

A pure Ce-doped silica fiber is fabricated using modified chemical vapor deposition (MCVD) technique. Fluorescence characteristics of a Ce-doped silica fiber are experimentally investigated with continuous wave pumping from 440 nm to 405 nm. Best pump absorption and broad fluorescence spectrum...

www.spiedigitallibrary.org

 

[CurtisOliver]

https://opg.optica.org/ome/fulltext.cfm?uri=ome-11-10-3445&id=458733

That diode would be very useful for the above laser. In general Eu or Eu,Sm doped crystals could definitely utilise it

 

[atomd]

Also pumping any blue dyes like cumarine basically requires 405nm or higher.

 

[farbe2]

Ruby also absorbs at 405nm but likes something around 410nm.
405nm also works and overdriving / heating / selection will get you there.

 

[kecked]

Once the price comes down to 100-200 I might consider it. Just too expensive.