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Thread: Beautiful Berlin Lasers

  1. #31
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    Quote Originally Posted by marco View Post
    Hi,

    if you have a high power q-switched Laserscope 532 you can also use a
    Raman-Cell (with internal gas return) filled with Deuterium to get bright
    red (strockes) and blue (antistrockes).
    With such a setup you will be able to convert arround 30-50% from
    532nm to ~630nm and 10-20% from 532nm to ~457nm

    greetings,
    marco
    I've got a liquid that does that for 1/200th the cost...Not a dye either. I'd publish it here, but I don't feel like giving that little bit away just yet.

    Steve

    Steve
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  2. #32
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    clandestiny is offline Eleventy-Billion Watt Ar/Kr >:)
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    Smile

    hey marco- thanks for the info-








    peace
    go big or go home

  3. #33
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    Hey P'fesser -

    Quote Originally Posted by mixedgas View Post
    I've got a liquid that does that for 1/200th the cost...Not a dye either.
    Reeeally...Red and Blue?? let's chat!! Does it need to 'circulate' as-in a dye-sys? Cause I've got plenty of 532 and a working 600 series....

    PM-sent...
    j
    ....and armed only with his trusty 21 Zorgawatt KTiOPO4...

  4. #34
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    Video of Berlin lasers.. pretty awesome!!

    http://www.youtube.com/watch?v=RiRhejN_dAk

  5. #35
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    Hello Steve,

    there are also some liquids doing nice Raman conversion - but you need a ramanshift
    of round 3000 1/cm - not all of them have this, some have more - some less.
    It would be much easier if the solid materials would have this raman shift,
    but they just have arround 800-900 1/cm.
    The biggest problem with all solid or liquid materials are thermal lense effects and
    damage by light, so the old gas cell is working best for high power.

    greetings,
    marco

  6. #36
    mixedgas's Avatar
    mixedgas is offline Creaky Old Award Winning Bastard Technologist
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    Quote Originally Posted by marco View Post
    Hello Steve,

    there are also some liquids doing nice Raman conversion - but you need a ramanshift
    of round 3000 1/cm - not all of them have this, some have more - some less.
    It would be much easier if the solid materials would have this raman shift,
    but they just have arround 800-900 1/cm.
    The biggest problem with all solid or liquid materials are thermal lense effects and
    damage by light, so the old gas cell is working best for high power.

    greetings,
    marco
    There is a new solid out with a high damage threshold, 30% conversion from green to yellow, and remarkably good self heatsinking.

    Steve
    Qui habet Christos, habet Vitam!
    I should have rented the space under my name for advertising.
    When I still could have...

  7. #37
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    Hi Steve,
    i read about some new Raman crystals, but the problem is that the shift is to low.
    From green to yellow is interesting for medical application, but for an RGB source
    i think it is not so usefull. Normaly the 2nd stroke is weak, so this is also not a
    good solution. It would be great to have a high stable solid state raman material with
    large shift - then high power RGB lasers shows become much easier

    greetings,
    marco

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