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Recent content by Daedronus

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    Large 532nm laser project

    A good 808nm beam is also important. The tem00 1064nm beam inside the nd:yvo4 is very small in diameter and ideally you want all the 808nm pump beam to be focused and absorbed inside the same volume. 808nm absorbed outside the tem00 volume can generate extra modes or simply be wasted. This is...
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    Large 532nm laser project

    ahh, you need to add pictures, nice find!
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    impress optical components

    How much for a Thin Film Polarizer coated for 1064nm, with 12mm diameter clear aperture? Do you have mounts for the polarizer? Do you have a messenger account, like MSN or Yahoo? Cheers
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    Looking for a >1Joule YAG Laser head

    nd:yag damage threshold....700 mega watts/cm2 150joules in 3 miliseconds....50 kilo watts? nope, you won't do anything to the rod. Anyway, even a red LOC diode will put out 1J, if it's running at 200mW in a 5 seconds interval it will put out exactly 1 joule. 1 Watt = 1 Joule/1 Second. My point...
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    Looking for a >1Joule YAG Laser head

    Here is a nice calculator for flash lamps: Fenix Technolgy : Fenix Calculator If we enter the ssy1 arc length, and bore, 150Joules, and 3ms pulse length we get 18% of the explosion energy, this is perfectly acceptable.
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    Looking for a >1Joule YAG Laser head

    There are two limits, the amount of energy the flash lamp can handle, and the saturation of the nd:yag crystal. If the PFN delivers long pulses in the flash lamp, the lamp will hold (that is it won't explode). There are no problems whatsoever to get a PFN to discharge in 3-4ms. You put in the...
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    Looking for a >1Joule YAG Laser head

    1J is not that big of a deal....especially if you don't mention pulse width. ssy1 can probably do it with a few ms pulse width. The electrical to optical for pulsed nd:yag is about 1%, so you just need about 100-150J in the flash lamp. But yes, once again....why 1J? In one of my videos you...
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    Buying: A complete ruby laser head

    Forget about all that PFN nonsense, the values are far from critical. I played with that for a long time and measured things with a oscilloscope, and I can tell you it's nothing too exotic. And the flash lamp pulse length for ruby is far less critical then for nd:yag. There was also another guy...
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    Buying: A complete ruby laser head

    He could always ask the seller...that exclusion list is a bit arbitrary... Or some kind soul from a non excluded country could get it for him.
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    Buying: A complete ruby laser head

    large Ruby laser rod, red laser DIY part 690 nm - eBay (item 250617850209 end time Apr-25-10 14:32:05 PDT) Ruby rod, ships worldwide...he might also have mirrors for them. Edit: and even better...
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    Buying: A complete ruby laser head

    Nope, there is nothing illegal about a ruby laser, the rule only refers to ex military equipment, and there are other ruby heads besides the rangefinder from the tank. And, there maybe ruby heads outside US for sale. Back to the topic, 300$ for what you ask maybe a bit too little. There is a...
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    FS: 355nm Q-switched UV laser

    While this laser is definitely dangerous, most of my lasers are industrial or medical grade, they can not only blind you but also kill you with the electrical, so it's beyond me how you set the rules for who qualifies or not. That, and another thing that bugs me, you got a nice laser but never...
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    SSY-1 Laserhead

    If you want air break-down and if you get a ssy1 make sure it has the q-switch in place. The ssy1 is cheap but so can be other better laser heads. Look what I just got for 133$: High Power Water Cooled Laser ND:YAG Rod 532 nm - eBay (item 350309705067 end time Jan-29-10 04:58:43 PST) No, I did...
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    SSY-1 Laserhead

    But if you must have a SSY1, here is one outside US, for cheap: Laser for sale
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    SSY-1 Laserhead

    Don't get too stuck on getting a ssy1, they are small, the flash lamp can't handle too many Joules, etc... You might want to wait for one of the nice water cooled heads that show up once in a while on eBay (like the one from my last video), or you could just get one of the huge ND:GLASS rods...




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