Is something approaching 1W of 532nm possible in a big handheld ?

I am getting one of Kenom's Kryton Beast's whenever they get machined. Is anything approaching 1W of 532nm possible to fit in that size host? For those that don't know, it's going to be 2" around and 11" long and use 2 18650 batteries.

The strongest 'module' you can get that I know of is an 800mW from CNI, and it would need active cooling and a lot of power, it's possible but not in a Beast.

Its been done professionally. I haven't seen anything >1W, but it definitely won't be done by the hobbiest, until the hobbiest can make his own green modules!

I doubt it could be done in a handheld. We have a 2 foot long, 6 inch tall 2W 532nm laser in the optics lab I'm interning in, though.

kevinmost93 said:

I doubt it could be done in a handheld. We have a 2 foot long, 6 inch tall 2W 532nm laser in the optics lab I'm interning in, though.

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thats pretty big for 2W...

this melles does +2w in a smaller package...

1W of green would require a 5W pump diode, which needs just over 6 A to operate normally - way above any reccomended current draw from any 18650 if you want them to live over 1 hour. Or at least not explode agressively.

Sorry, it's not possible.

Your best bet is to have 2 or 3 W IR c-mount in there and have a very powerful IR burner.

Visibility would obviously be 445nm 1W, perhaps even ran at 1.8-1.9 A and have just over 1.5W out of it.

But for a green, this is as best as it gets for the money:
High power 400mW green laser module/IR filtered [OLHGLM400] - $380.00 : Welcome to O-Like.com, Your source for laser products

Bill bought one of those and it does 550mW peak I think, just over 500mW average or something. See his channel on youtube "billg519" , same username here.

You can also ask him about powerful IR builds, since the guy does have 4W IR in a handheld host. Uses some big*ss 2x 26500 or something lithium ions.

Well I never said that the laser we use is compact.

The housing is very plasticky though so I'm thinking the actual internal components don't take up that much room and it's just a bulky shield.

you Could build a 1W green but your host would be the size of a 6V flashlight the underwater kind.
In there you would have plenty of room for the cooling and enough room for all the power you need. but at that size it would not be portable in the sense i call portable anything that goes in my pocket.
And if you wanted to go crazy they even make fanny pack psu for them so you could have even more room for it.
but why 1W of green it only takes 200mw of green to out shine the 445nms so even if you only got 400mw of green it would be stupid bright.

I was shown one that I am not at liberity to speak much about- made for a private owner and not for sale to the public. It had a fan inside and was powered by two wired rechargeables about the size of 'D' cells. They had another slightly smaller one that had 4 DPSS diodes inside that each had its own opening out the front.(not combined into one beam)it ran from 2(or 3-not sure) CR 16340s. So it is definetly do-able. Portable handhelds if you have a large pocket(and pocketbook!)

got another look at the 1watt greenie--i was told it did have a 5W ir in it. and that one 'might' be gotten for around 1600$

Eudaimonium said:

1W of green would require a 5W pump diode, which needs just over 6 A to operate normally - way above any reccomended current draw from any 18650 if you want them to live over 1 hour. Or at least not explode agressively.

Sorry, it's not possible.

Your best bet is to have 2 or 3 W IR c-mount in there and have a very powerful IR burner.

Visibility would obviously be 445nm 1W, perhaps even ran at 1.8-1.9 A and have just over 1.5W out of it.

But for a green, this is as best as it gets for the money:
High power 400mW green laser module/IR filtered [OLHGLM400] - $380.00 : Welcome to O-Like.com, Your source for laser products

Bill bought one of those and it does 550mW peak I think, just over 500mW average or something. See his channel on youtube "billg519" , same username here.

You can also ask him about powerful IR builds, since the guy does have 4W IR in a handheld host. Uses some big*ss 2x 26500 or something lithium ions.

Click to expand...

Going to have to disagree on the battery part, Eudamonium.

An IR diode has a Vf of ~1.8V, which at a current draw of 6A=10.8W.

In general 18650 batteries are rated at 2C, decent quality ones handle 2C without sweat.

So lets take a 2800mAh 18650 battery, 4.2v at full charge X 5.6A = 23.52W (does drop, however is still sufficient)

Through the use of a semi decent DC-DC converter one could power a 5W pump diode from a 18650 battery without much problem. Judging by the size of the beasts front compartment, I think sufficient space for the converter could be found.

To be honest, the main problem I see is keeping the crystals happy and cool.

brtaman said:

Going to have to disagree on the battery part, Eudamonium.

An IR diode has a Vf of ~1.8V, which at a current draw of 6A=10.8W.

In general 18650 batteries are rated at 2C, decent quality ones handle 2C without sweat.

So lets take a 2800mAh 18650 battery, 4.2v at full charge X 5.6A = 23.52W (does drop, however is still sufficient)

Through the use of a semi decent DC-DC converter one could power a 5W pump diode from a 18650 battery without much problem. Judging by the size of the beasts front compartment, I think sufficient space for the converter could be found.

To be honest, the main problem I see is keeping the crystals happy and cool.

Click to expand...

What you are calculating here is the input power of 10W.
Grab into account efficiency of 45% and you got a 4-5W diode.

Next, not a lot of batteries actualy have THAT large capacity, and none from DX actually have them. I just happen to have all my batteries from DX because they are dirt cheap. They are usually only about 2000mAh or so.

Though buck converter might work, well depending on their efficiency that is, but it's possible to push it to power a 5W c-mount from one 18650,

But for that you're much better off with bigass D cells, like Hercules uses them.

That or a lithium polymer battery, like these :
4PCS A123 NEW original 18650 Lifepo4 battery element - eBay Other, Rechargeable Batteries, Batteries Chargers, Electronics. (end time 13-Sep-10 19:58:40 AEST)

30A, quite impressive, eh?

Eudaimonium said:

What you are calculating here is the input power of 10W.
Grab into account efficiency of 45% and you got a 4-5W diode.

Next, not a lot of batteries actualy have THAT large capacity, and none from DX actually have them. I just happen to have all my batteries from DX because they are dirt cheap. They are usually only about 2000mAh or so.

Though buck converter might work, well depending on their efficiency that is, but it's possible to push it to power a 5W c-mount from one 18650,

But for that you're much better off with bigass D cells, like Hercules uses them.

That or a lithium polymer battery, like these :
4PCS A123 NEW original 18650 Lifepo4 battery element - eBay Other, Rechargeable Batteries, Batteries Chargers, Electronics. (end time 13-Sep-10 19:58:40 AEST)

30A, quite impressive, eh?

Click to expand...

Hey Eudaimonium

I actually have a few of the A123 Lifepo4's on order. I was just thinking since their recommended fully charged state is 3.6V can I charge them with my normal 18650 charger?

Or you could just make a proton pack
:evil:

Eudamonium:

Yes...I calculated the required input power to achieve an output of 5W, based on the 6A figure provided by you...

Believe it or not but there is a whole world of brand name 18650 cells available out there (LG, Samsung etc...), which do come in in the capacity I mentioned and beyond. I own two DX cells, which as you mentioned are indeed complete crap...I power all my lasers from Samsung 2600mAh cells. I wouldn't trust a DX cell over .5C imo. Name brand on the other hand...lovely! BTW: A great source is a laptop which doesn't charge anymore...generally too expensive to fix...but can be powered through cord...battery pack is then useless and viola... very decent 18650 cells!

I don't disagree that a D-cell would be superior in terms of high current applications...what I am disagreeing with is the statement in the post I quoted.

Would a 18650 powering a 5W pump diode be ideal? Absolutely no, but it is more than possible.

Yes LiFe batteries are indeed quite nice, problem is capacity TBH, they are superior to LiIon in every other way. However I fail to see the relevance...

Thanks for the input guys. I'm not too worried about battery life. If I could use 2 high cap 18650's and get 15-30 minutes use out of them that would be fine.

As for why would I want 1W of 532nm in a portable? Well I like to be unique, and that would definitely be a unique build.

Its been done, but this has a 'built in' battery @ 3.6v, so im guessing
some sort of parallel config.

5000mw,5W 808nm Infrared IR Laser Nightvison Flashlight - eBay (item 110576724435 end time Sep-21-10 07:07:20 PDT)