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Thread: ... will ruby spheres work for a DIY-laser?

  1. #11
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    mixedgas is offline Creaky Old Award Winning Bastard Technologist
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    You're going to hit Stokes law if you try to pump in the IR.. IR would not pump the 694 transition, the pump light for a three or four level system needs to be shorter in wavelength then the lasing wavelength. The process Has to comply with the laws of Thermodynamics. You may see long wavelength IR fluoresce from a Chromium line if you pump at 976, if you could detect 1.5 to 3.5 microns.

    Steve
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  2. #12
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    ... yes, the NIR-diodes are not suited and not meant for the ruby or Fluoresceine setups.

    Nd:YAG rods are pumped with something between 803 to 810nm to emit 1064nm; the Yterbium fiberlasers are pumped with 975nm to give 1070nm.

    Have too a Nitrogene TAE "laser", which pulses at 337nm with 200ps! short pulses of peak powers up to 400kW!!, what could be interesting for the Fluoresceine or other dyes.

    But something with the pig-tailed NIR-diodes would be much easier to build, if I'll get a lasing medium with NIR pumping at 975nm ...

    Viktor

  3. #13
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    in a traditional ruby laser silver will make about 10 flashes before it burns right through. It can't handle the power. What will is not much but Dielectric is better.

  4. #14
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    ... in a "traditional" ruby laser the laser beam is a thin line, so all of the energy will concentrate on a pretty small area on the end mirrors.

    With a sphere, the beam is only "focussed" in the center of the sphere and widened on the polar mirrors -- I think, the center will brake down, before the mirrors evaporate.

    But what energies are we talking here about? - I would be really surprised, when managed to get some Watts CW or (when pulsed) some hundred Watts peak-power out

    Viktor

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    ... placed a glass "UV-tester" on the 405nm-LED at 10, 100, 500 and 1000 Milliamperes

    Viktor
    Attached Thumbnails Attached Thumbnails 6-405nm@10_100_500_1000mA.jpg  

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  6. #16
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    Not sure if this is the *proper* thread for this but I just came across this article about cw ruby but it's probably old news. Still:

    https://www.osapublishing.org/osac/f...-184&id=403683
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  7. #17
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    ... Thanks! - looks like pretty helpful information

    Viktor
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