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  1. L

    Question about intensity control with PWM

    I've done what your trying to do at 12Kpps. I used an acousto-optic modulator with an 80 Mhz base frequency and 14 Mhz of bandwidth. Had a video grade 8 bit ADC clocked at 6 Mhz ran into a comparison register circuit clocked at 6.2 Mhz for dithering. Turned the AOM on and Off PWM style...
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    561nm and 563nm-571nm laser modules for sale

    As for 976, as a pump replacement, We tried... Diode change was easy if you have worked on fine mechanics before. , #2 JIS screw driver, soldering iron , anti stat strap, a pair of decent flat jawed 4" needle nosed pliers, and a soldering iron. You need quick drying epoxy to properly insulate...
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    Anyone have info on the Lumenis Novus Spectra?

    The V-106 emulates a SP T series rack mount diode laser power supply. You just need the interlock wiring, a USB to serial cable and the commands to send. its 0-3 watts of 1064, and that one doesn't have the Q-switch from the looks of it. I'm in the process of reverse engineering one for...
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    Self defense

    Montana Grizzly Bear Notice: In light of the rising frequency of human/grizzly bear conflicts, the Montana Department of Fish and Game is advising hikers, hunters, and fishermen to take extra precautions and keep alert for bears while in the field. We advise that outdoorsmen wear noisy little...
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    Beam termination/laser catch:

    I prefer a stack of single sided razor blades, the closely spaced, sharp edges , diffract high power beams quite nicely. Steve
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    But I want a Crystal of XZY for Color ZZZ nm for 10$ on Ebay Or How I learned to Love Commercial Crystals and Hate the Bomb!

    Note the attached RCA internal magazine is 1963ish. The Laser was invented about two years earlier. I get question after question on Solid State Laser Crystal growth.. This publication has a pretty good explanation of why it it is difficult and expensive. What they do not mention is the time...
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    DYE help

    His actual best bet is to find a University or Industrial lab near him, that has a working dye. Then go there and ask for help. in 30 years of working with lasers, I can count on three fingers of one hand, the number of people I've met who got a ring dye going from scratch without the...
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    DYE help

    About 4-5 grams minimum if he gets it on the first go round. He still needs a big green DPSS or an All lines Argon doing say 4 Watts. 405 is out as a pump, not close enough to the lasing wavelength. Steve
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    DYE help

  10. L

    DYE help

    Ah, the Manual your Looking for is a "Lexel Aurora" Which was a Lexel 295 Argon with a Dye Head just like that. When I get home from work I'll see if I still have it in the stuff I rescued from the Lexel Factory Auction. Basically the idea is get the get working with pure alcohol and a tiny...
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    How Important Is Soft Start?

    Ever tore into a DVD burner driver? Trust me, the DC bias comes up sloooowy... It may not be 15 seconds, it may be on the order of milliseconds, but it IS there. The soft start is built into the current mirror startup circuits in the chip itself. Transient analysis is a huge part of Electrical...
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    SP 127b alive and well! :D

    It is not ordinary Pyrex on these... It is an aluminosilicate that has reduced helium diffusion and specialized expansion properties that let it bond to Kovar for the lead thrus. Junctions between the different glasses need 3 or more different glass types on average aka a graded seal.. Most...
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    ANTIFA Likely Permanently Blinded Federal Officers With Lasers, Officials Say

    Overdriven LRADs of a more sophisticated type can be very bad for civil rights if misused. Just Less then Lethal, not Non-Lethal, is the way to think about the terminology of some of these devices. I'm not going to get into details, because I have the odd nightmare still and a conscience...
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    ANTIFA Likely Permanently Blinded Federal Officers With Lasers, Officials Say

    Quote ' I'd like to offer my services to the protesters. Put away the lasers and I'll help you build your own LRAD device" Do me a favor and don't do that. I worked for one of the companies in that market for a while. Trust me on that... Give them an inch and they'd take a mile, trust...
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    574nm DPSS 20mW

    Opt was NOT the only group working on that crystal. I looked at ordering one from my favorite Chauvet Dealer. "preorder" and no firm deadline for shipment. Chinese government sponsored research is almost always spread across multiple labs, crystal growth is no exception. I would not assume...
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    What happens if they confiscate your laser?

    Feds, outside of Customs, just send you a letter of apparent liability after giving you a chance, in most cases, to submit a correction plan, after sending you a notice of violation. In other words, cease and desist, send XXXXX Dollars to ZYYY account at a Bank in Pittsburgh in N days or...
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    Morons with Drones.........

    Personal drones and RC planes are the FAA's new target. The new rules are draconian. You have till Monday at like Midnight Eastern to comment on the FAA NRPM at regulations.gov.
  18. L

    HeCd laser availability ...

    KImmon.. Still makes them. Omnichrome not made for a decade and change, and no new Liconix for like 20 something years. Therefore, look at Kimmon… The recent Kimmons are beautiful instruments. I have no experience with the Russian design, which are few and far in between, and never really...
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    Another knuckle head

    US Title 18 CHAPTER 2 SECTION 39a is one of the applicable federal rules, "Interference with Aircrew in the Performance of their Duties". Steve
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    successfully lase Pr YLF crystal

    Where are you located? Perhaps I can send you some brand new orange or green HENE OCs to match your experiment. I have around 175 of them in different variations including multiline. Steve


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