Has anybody experimented with the 10W+ IR diodes?

Rivem · May 24, 2016

I've seen some c-mount, f-mount, and rarely a TO-9 808nm diodes with claims of 10W power levels. They're single emitter and not the FAP/arrays we've seen on the forum. I'm not sure they're legitimate, but they've got a price tag like they are.
I'm sure they're intended for high power DPSS.

Anybody that's into IR illumination or serious burning messed with them at all? Seems pretty interesting to me for use in a CNC if I could get it to cut balsa well. Would make a scary invisible laser pointer though.

Here are some eBay links for examples, but they're far from the only ones for sale online:

808nm 10W High Power C Mount Laser Diode | eBay

808nm 15W High Power C Mount Laser Diode | eBay

10W 808nm Laser Diode F Mount with Fac Lens | eBay

Edit: I guess they wouldn't be good for burning wood, but I'm sure there are tons of uses. Alaskan and Hemlock Mike both have 808nm bar diode FAP projects, so this would be similar but likely with better beam specs.

ElectricPlasma · May 24, 2016

Re: Has anybody experimented with the 10W+ IR diodes

Interesting project idea, I can only imagine the heatsyncing needed for 10w coming straight from a diode especially for a CNC's run time. Don't know much about IR diodes myself, maybe someone can chime in about them and if these look legit or not.

Laser Modules for Cutting/Engraving (CNC) - OdicForce

Odicforce.com said:
Bluray (405nm) Laser Diodes

These diodes are available as in 100mW, 200mW and 500mW. OEM versions of these diodes are normally extracted from high speed Bluray writers as these are much cheaper than catalogue components.

The 405nm laser light is adsorbed better than red laser light by many materials so black masking is not required.

200mW 405nm Laser Diode

Paper black: Cut
Chocolate: Cut/engrave
Paper white: Cut /engrave
Coloured fabric: silk, cotton: Cut
Hard Cardboard: Engrave
Balsa, Plywood: Engrave
0.5mm balsa: Cut/Engrave

500mW 405nm Laser Diode

Paper black: Cut
Chocolate: Cut/engrave
Paper white: Cut /engrave
Coloured fabric: silk, cotton: Cut/engrave
Hard Cardboard: Cut/Engrave
Balsa, Plywood: Engrave
1.0mm balsa: Cut

How thin is the wood your cutting, ever thought of combining a couple class IV 405nm diodes? Their wavelength cuts much easier but that sacrifices power as there aren't much 405nm diodes above 1W. Maybe you could try combining a couple, or maybe more, with a beam combiner and G2 as your lens? Blue works as well, that's pretty much the compromise between IR and 405nm. Maybe you can run a (or again, maybe a couple) NUBM44s with a G2?

You should check out the link earlier in this post, pretty useful info. Shows info for up to 500mW 405nm and 2W 450nm.

Rivem · May 24, 2016

Re: Has anybody experimented with the 10W+ IR diodes

ElectricPlasma said:
Interesting project idea, I can only imagine the heatsyncing needed for 10w coming straight from a diode especially for a CNC's run time. Don't know much about IR diodes myself, maybe someone can chime in about them and if these look legit or not.

Laser Modules for Cutting/Engraving (CNC) - OdicForce

How thin is the wood your cutting, ever thought of combining a couple class IV 405nm diodes? Their wavelength cuts much easier but that sacrifices power as there aren't much 405nm diodes above 1W. Maybe you could try combining a couple, or maybe more, with a beam combiner and G2 as your lens? Blue works as well, that's pretty much the compromise between IR and 405nm. Maybe you can run a (or again, maybe a couple) NUBM44s with a G2?

You should check out the link earlier in this post, pretty useful info. Shows info for up to 500mW 405nm and 2W 450nm.

Thanks for the links. I've actually tried a friend's 2W 445nm on 1/8", and it worked okay, but the cut wasn't great, and it took several passes. I'd really like to go up to 1/4" balsa if I get my own.

I'm sure combining a bunch of 405nm lasers would work great, but I'm not sure the cost and effort would be worth it compared to other options.

Still, buying a cheap CO2 cutter from China and making it tolerable might be worth it for my uses. Probably would cost about the same as most DIY options. It'd work for glass too. Gotta get my mill and lathe first though

Was looking around for cheap FAP lasers to experiment with when I came across these. I don't think I'd use one, but they seem really interesting. I'm hoping somebody has one and has LPMed it on overdrive.

Cyparagon · May 24, 2016

Re: Has anybody experimented with the 10W+ IR diodes

The large emitter size means they have a very poor beam, and will focus to a broad line. IR is not ideal for wood burning either.

I've got a 40W diode bar I play with from time to time.

ElectricPlasma said:
I can only imagine the heatsyncing needed for 10w coming straight from a diode

It's a basic calculation. 2V*11A = 22W in. 10W out means 12W of heat.

By comparison, those numb44 things are 4.5A*4.5V = 20W in. 6W out means 14W of heat.

Rivem · May 24, 2016

Re: Has anybody experimented with the 10W+ IR diodes

Cyparagon said:
The large emitter size means they have a very poor beam, and will focus to a broad line. IR is not ideal for wood burning either.

I've got a 40W diode bar I play with from time to time.

It's a basic calculation. 2V*11A = 22W in. 10W out means 12W of heat.

By comparison, those numb44 things are 4.5A*4.5V = 20W in. 6W out means 14W of heat.

Thanks for the input Cyp. I just looked at the specified emitter size, and it's definitely huge

. I thought the big semiconductor was more for heat dissipation, but it looks like it's spreading all that serious power over a big area.

I also just checked out the absorption spectra of several types of wood, and it looks like most wood has a high reflectance/low absorption around that IR wavelength. I guess I'll scratch 808nm for my CNC plans

Still, these things seem really interesting. That extra efficiency is pretty cool too. Would probably make an awesome IR illuminator if I was still into night vision.

Are they the highest power single emitter laser diodes commercially available right now? They've also got to be able to push at least a bit over their massive rated power.

Rivem · May 31, 2016

Styropyro's back: :bumpit:

Care to try one out?

DashApple · Jun 2, 2016

Not used a Cmount one , but I have used a 7W 940nm fibre coupled diode

Rivem · Jun 2, 2016

DashApple said:
Not used a Cmount one , but I have used a 7W 940nm fibre coupled diode

Cool! Was it a FAP or single emitter?

DashApple · Jun 2, 2016

Rivem said:
Cool! Was it a FAP or single emitter?

Thanks , Single emitter : D

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