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    B&W-tech Spectrometer & 473 module: Setup+Mods+Info

    Re: B&Wtech 473nm unit / Spectrometer Mods & Info Mosc007, I'm a technician at a small state university. Is there any chance of adding a Comma Separated Value (CSV) output to your software with the wavelength in nanometers and pixel count? I'm putting five units into a undergraduate lab...
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    Partial mirror beam splitter for high power laser measurements

    We professionals use thick wedges to separate the ghost beam from the Fresnel beam.. Much easier then a glass slide.. Steve
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    New Spyro Project Thoughts

    Replace one of the four mirrors with a Dove prism. Lets you introduce offsets and orbits to the pattern... Thank me later.. Steve
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    FDAs Proposed Ban Of Laser Pointers

    Unintended uses like illuminating cars, planes, ships, trains, soccer players, football players, baseball batters, hockey players, concert goers, rock stars, and idiotic stuff like this is why FDA is asking to roll back to 1990s rules and performance. Once upon a time when laser diodes were...
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    Water Laser? New Type of Experimental Laser

    I pulled the paper at work. They are using Using water ripples ringing around a droplet to create a symmetrical array of phonons to cause a minute , but highly controllable frequency shift of the pump laser light. All it does is impart a controlled Raman or Brillioun shift to the incoming...
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    best wavelenght to ionize air

    9g50-100 mJ of 3 to 7 nanosecond pulsed Yag will do it all day. If there is dust in the air for the plasma to form on. Far less power is needed if it's hitting my fingernail or business card. For this you need a EO q-switch, an Ao style usually is too slow. Used to be a real problem on...
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    converting galvos and pin assignments

    G325 use a RF driven capacitive position sensor that outputs a few microamps per degree of current riding on a 2 Mhz broad spectrum RF hash that has to run through a low pass filter and into a current to voltage converter based on a differential amplifier. The more modern galvos output two...
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    FDA wants to restrict green & blue laser pointers as "defective"

    Fda has precedent for this. They are rolling things back to a 1990s rule, to period when there were no complaints. Make them any angrier, and they will roll it back to the period before that, when a manufacturing permit was required to mass produce a pointing device. When cheap 5 mw 690 nm...
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    Spectra Physics 164 265 exciter

    Sam was handing out the wrong email. However , I hate to be mean, but if you could not open an account at the other forum, or find me in one of the four other places on the net, I'm going to be questioning your ability to change the laser over. You have to change the main connector and...
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    Lexel Excel 3000 3W Argon Ion Power Supply?

    You do NOT want an Excel series PSU. They were a limited run, with the design produced by an outside contractor for Lexel. There is a un-needed, incredibly complex logic board in the Excel psu that is probably the reason it was discarded. Excel PSUs thus have severe issues for repair, due to a...
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    can an IR dot cause afterimage or damage

    Don't try the CW high power IR spot on the wall thing without proper goggles. The power levels for damage are actually a bit less then a similar visible spot in some cases due to retinal adsorption of the IR as the wavelength gets longer. Only way to be sure something is safe over a few tens...
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    Homebuilt 3-5W Copper Vapour Laser System

    AngelG, Its not all gone, just principal staff have retired except for one or two guys. Also they got European grant to do metalworking etc. and went very quiet. Not much market for laser show CuBr any more, and technology was/is open, to the level of complete drawings if you have access to...
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    Which is better for a DIY liquid sky effect: spinning polygon mirrors, or a galvo?

    Rotating mirrors give you very large angle scans with a fixed angle. This spreads the energy out a lot, which can mean needing more laser power. Also they tend to have a very narrow scan rate range, which gets boring. Steve
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    laser crystals bonded with q-switch

    Two pulses, with the first one being small, is probably due to lensing from self adsorption in the CR:YAG. First starts to bleach, then heats up causing lensing, adsorption, diffraction, or scatter, then finally fully bleaches and lases. It is not uncommon to see poorly designed...
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    Homebuilt 3-5W Copper Vapour Laser System

    FYI guys, sodium D1 will not lase. Sodium D2 will lase if properly pumped, but you need to seed it with an external dye laser to suppress a problem with a forbidden transition. So of course the cost of adding a dye laser and tuning it makes a true visible sodium laser not worth doing...
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    Homebuilt 3-5W Copper Vapour Laser System

    As a former CVL owner, just one question? Why not insulate the tube and just cool the end bells? Or do you have high temperature insulation under the cooling cylinder that I cannot see? Steve
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    laser crystals bonded with q-switch

    Doing a little quick math in my head, and based on 27+ years of experience. Since it says 60% T on the OC coating , the transmission is way too high for that length of crystal, at amateur pumping conditions. You may need an external OC as well. 6 to 15% would have been believable. 60% T...
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    All 609nm please stand up

    Kaiser, You got access to a frequency counter that does Ratio A/B in your lab? I have access to a milling machine for the airtrack cart. :-) That would get it over with once and for all, us a short red laser for the reference and the 609 line to be the target. Note for Bloom, a ratio...
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    LaserPhysics Reliant 300WC help

    Two lines with a third weak blue is the "Red Blues", in old school water cooled laser show parlance. You have a severely high pressure tube if the red and blue dominate. When the pressure rises, the transition probability favors 647 and 482 Krypton lines, and your other blue is probably a weak...
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    Any low cost suggestion to get a tunable laser?

    ECDL A little more hacking oriented site: Click on URL---> 100mW+ single mode external cavity diode lasers (ECDL) Click on URL----> http://hololaser.kwaoo.me/laser/ECDL-test.html More or less oriented to what I think the OP probably wants this wavelength range for: Click on URL--->...


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