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Thread: lpc-826 and phr-805 graphs

  1. #1
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    Default lpc-826 and phr-805 graphs

    i asked a guy from lpf to graph these diodes for me since i dont have a lot of time between my job and the shop. i thought you guys may be able to benefit from the info as well here.

    The "series 1" of the violet graphs was cooled but many things were changed throughout the test such as duration of each current step, TEC voltage, TEC heatsink fan voltage, and lens. Better to take "series 2" as a reference.


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  2. #2
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    Wow, can you clarify that wavelength shift per mA? 658 @ 10mA to 664 at 500mA seems like a big shift; is that without cooling?
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    allthat... aka: aaron@pangolin

  3. #3
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    Quote Originally Posted by Cyparagon
    Cooling them raised the voltage drop and lowers the wavelength. The red drops about 4nm when cooled to ~35F and the violet drops about 3nm when cooled to ~35F. The reds start at 657nm and rise ~0.015nm/mA. The violets start at 406nm and rise ~.040nm/mA.
    this is about the best i can tell you without his input. i think he used a TEC cooled rig for at least one diode of each kind if im not mistaken. ive posted them on lpf as well and am trying to get him to post exactly how his test setup was done during testing.

    "series 1" and "series 2" are 2 seperate diodes btw
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  4. #4
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    Thumbs up

    10-4; I would think that shift in wavelength would almost mean 200mW and 300mW wold look close to the same in terms of luminosity. that might be an ineresting graph if it was possible to make.

  5. #5
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    heres the links to the threads over there if you guys want to brave the kiddie drama to keep an eye out for cyparagons posts. ill keep this thread as up to date as possible with any info he may post back with.

    http://laserpointerforums.com/f38/ph...phs-63868.html

    http://laserpointerforums.com/f50/lp...phs-63867.html
    http://modwerx.com

    Modwerx stocks several components, accessories, and tools for the laser hobbyist and professionals!

    Always remember to keep it safe and sane by practicing proper laser safety whether your into pointers or laser shows!

    http://en.wikipedia.org/wiki/Laser_safety

  6. #6
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    A few key details are missing to fully understand the results in the graphs. What lens was used? (relevant for power graph).
    This space for rent.

  7. #7
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    as soon as he is online i will have a reply. as i stated i didnt do the testing on these. these diodes are fairly new so as far as i can tell these are the first graphs having to do with the 826 and 805 diodes.
    http://modwerx.com

    Modwerx stocks several components, accessories, and tools for the laser hobbyist and professionals!

    Always remember to keep it safe and sane by practicing proper laser safety whether your into pointers or laser shows!

    http://en.wikipedia.org/wiki/Laser_safety

  8. #8
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    Not to bash anyone, but what is the obsession with 405nm... isn't 445nm a much nicer diode to play with? or are the 4-5s easier to get as they come in most of the sleds now? Better to play with due to cost?

  9. #9
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    Quote Originally Posted by ndrew2505 View Post
    as soon as he is online i will have a reply. as i stated i didnt do the testing on these. these diodes are fairly new so as far as i can tell these are the first graphs having to do with the 826 and 805 diodes.
    Have you seen these (826)?

    http://www.photonlexicon.com/forums/...745#post189745

    http://www.photonlexicon.com/forums/...862#post189862

    http://www.photonlexicon.com/forums/...505#post190505

    Quote Originally Posted by allthatwhichis View Post
    Not to bash anyone, but what is the obsession with 405nm... isn't 445nm a much nicer diode to play with?
    They are popular with the pointer crowd for burning and popping balloons.
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  10. #10
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    Quote Originally Posted by dnar View Post
    i do like the violet color but they dont make good "white light"

    and no i havent seen those graphs. i only lurk on this forum for the most part b/c i cant afford to build a setup the way i want to. also i do miss posts from time to time...
    http://modwerx.com

    Modwerx stocks several components, accessories, and tools for the laser hobbyist and professionals!

    Always remember to keep it safe and sane by practicing proper laser safety whether your into pointers or laser shows!

    http://en.wikipedia.org/wiki/Laser_safety

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