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Thread: 4w 808nm diodes anywhere?

  1. #1
    Enlightened
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    Default 4w 808nm diodes anywhere?

    I'm going to build a 4w IR device which uses double C batteries. Battery life will be extremely short, but it is for firestarting and lab/show purposes so this is not an issue. Does anyone know where to find a C mount type 4w 808nm diode which outputs properly for tight beam collimation? I looked everywhere on the net, but I never seem to have any luck when it comes to diode searching. Thanks guys.

  2. #2
    *Flashaholic* IsaacHayes's Avatar
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    Default Re: 4w 808nm diodes anywhere?

    Be very carefull with your eyes (and others) as this is invisible mostly and very dangerous. If you can find a 2W or even 1W you should be able to start fires with that. I know fiber optic lasers for networking and such can be in that range. Check ebay but becarefull of course!!

  3. #3
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    Default Re: 4w 808nm diodes anywhere?

    4w was just the goal I guess you could say. I would view it with a digital camera or nightvision. Also while of coarse using eye protection. I know these things are out there but hard to come across.

  4. #4
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    Default Re: 4w 808nm diodes anywhere?

    coherent is one of the place to get 3W C-type: http://www.cohr.com/
    http://www.cohr.com/downloads/780_to..._DevicesDS.pdf


    You can also see nlight for 5W C-type: http://www.nlightphotonics.com/Products/Prod_C.asp

    However, all the single device of this power have an emitting area of 1um x 200um which is not good for producing tight beams.

  5. #5
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    Default Re: 4w 808nm diodes anywhere?

    If you were in China, I suggest you buy it from HT at: http://www.htoe.com.cn/english/speci...810nmhpld.html
    Good quality and much cheaper price. I once asked for quot on LDM-0808-003W-X3 and got the anwser of 2000rmb/ea which is 250usd/ea. This is the company that Coherent China recommended to me when I ask them for quotation. I personally don't like the 5W version because the emitter area is too large and we can always overrun the 3W device to 5W in short period since aging is not a concern at all in battery powered system.

  6. #6
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    Default Re: 4w 808nm diodes anywhere?

    Too bad I can't run across something with a more proper emitting area. I could over drive a 3w since it would only be on for about 20 seconds.

  7. #7

    Default Re: 4w 808nm diodes anywhere?

    An emitting area larger than 100x1um is real hard to collimate to a stable tem00 beam. every now and then you run across 500mW - 1W units with a 50x1um emitter on ebay. those are quite nice.

  8. #8
    Flashaholic* Draco_Americanus's Avatar
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    Default Re: 4w 808nm diodes anywhere?

    I am going to try doing the same thing, but I am going to use a 35watt diode laser with a fiber optic cable allready attached. I just hope the diodes I ordered from e-bay work, one guy had them for around 50 bucks but they where as-is and untested. I wish to build it into a maglight using aa batteries with addapters that I allready have

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