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Thread: Blue eBay diodes - 5.6mm vs 9mm laser diode case - heat efficiency

  1. #11
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    Cool

    Quote Originally Posted by aijii View Post
    hmm. 24 x 1 watt diodes, knife edged, and mixed with a laserscope
    Whatcha gonna use for red?

    Adam

  2. #12
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    Quote Originally Posted by buffo View Post
    Whatcha gonna use for red?
    Split the vag beam, send 3/4 of it to a dye cell (Or use a raman shifter).

    Hey, you know that might actually work, 18W or so of blue (all those mirrors), maybe 10W of red and 10W of green.

    Bit big and heavy, and with really ropey beam specs, but hey, 25W or so of (admittedly Q switched) white from a 32A single phase supply....

    Actually I wonder if you could stokes shift the blue to red, pump beam quality would be a serious problem, as threshhold tends to be high but it just may be possible.

    Regards, Dan.

  3. #13
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  4. #14
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    Wink

    Quote Originally Posted by DMills View Post
    Split the vag beam, send 3/4 of it to a dye cell (Or use a raman shifter).

    Hey, you know that might actually work, 18W or so of blue (all those mirrors), maybe 10W of red and 10W of green.

    Bit big and heavy, and with really ropey beam specs, but hey, 25W or so of (admittedly Q switched) white from a 32A single phase supply....

    Actually I wonder if you could stokes shift the blue to red, pump beam quality would be a serious problem, as threshhold tends to be high but it just may be possible.

    Regards, Dan.
    Now look what you've done Adam... Inspiration is always a beautiful thing.
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  5. #15
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    Quote Originally Posted by buffo View Post
    Whatcha gonna use for red?

    Adam
    take part of the green and pump the dye
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  6. #16
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    Quote Originally Posted by SrS View Post
    Assuming this is true and the 2500 lumen beamer contains custom 1W diodes (higher power in same casing with as downside worse beamspecs) and the 2000 lumen model contains “original” 500mW nichia’s. Isn’t the 2000 lumen beamer a better donor device for our purpose then?
    The "better" companies use 2x500mW nichia to build 1W 445nm to get better beam specs.

  7. #17
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    Quote Originally Posted by DMills View Post
    Split the vag beam, send 3/4 of it to a dye cell (Or use a raman shifter).

    Hey, you know that might actually work, 18W or so of blue (all those mirrors), maybe 10W of red and 10W of green.

    Bit big and heavy, and with really ropey beam specs, but hey, 25W or so of (admittedly Q switched) white from a 32A single phase supply....

    Actually I wonder if you could stokes shift the blue to red, pump beam quality would be a serious problem, as threshhold tends to be high but it just may be possible.

    Regards, Dan.
    18 + 10 + 10 is a bit more than 25W ?
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  8. #18
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    Quote Originally Posted by buffo View Post
    Whatcha gonna use for red?

    Adam
    1064nm.

    i mean, it works with blu-ray, and thats almost invisible
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  9. #19
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    Quote Originally Posted by aijii View Post
    18 + 10 + 10 is a bit more than 25W ?
    True, but you have to allow for quite a few losses.

    The combining dicros have to survive large Q switched pulses which probably means that you have to expand the beams from the KTP and the dye, combine everything and then telescope it back down, which equals a lot of surfaces to soak up the light.

    Also there is probably not the space on a 'scope optical bed to do the diode shuffle there, (By the time you have the dye laser components and the beam splitters on there) so you are into more optics to bring the blue to the red and green.

    It would rate as a very silly thing to build in some ways, but I suppose it has a certain WTF cool! factor about it.

    Actually a more interesting question is if there is a red or green laser medium with a pump band that is a good match for the 445 blue... Blue being cheap enough now that using it to pump a red or green could be interesting is a suitable gain medium exists (maybe one of the normally argon pumped dye chemistries).

    New thread time methinks....

    Regards, Dan.

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