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  1. mwang

    Finally got myself a spectrometer!

    Hey everyone! It's been a long time since I posted anything here. I started collecting lasers back in 2013. Recently got back into this hobby. I've always wanted a spectrometer. I finally saved up enough to justify pulling the trigger, and a week or so ago, I saw this gem on ebay. Ended up...
  2. mwang

    808 nm Pen: Interesting Spectrometer Readings

    Next time I use the spectrometer I'll be sure to try and take more readings. By the width of the peaks from this data, though, it looks like both are lasing lines. Can't tell for sure though.
  3. mwang

    808 nm Pen: Interesting Spectrometer Readings

    Interesting. This would mean that there are a large amount of lasers outputting at 800nm and 808nm, but a relatively small amount in between? I would think that the spectrum should be somewhat continuous like a gaussian distribution, and not with two distinct peaks. And don't worry, the spot...
  4. mwang

    808 nm Pen: Interesting Spectrometer Readings

    I was doing some spectrometer readings for my research samples and slipped in my laser... Did a quick test on my 808nm ebay pen (power output 220 mW, multimode bar-shaped output). I took the lens off, and directly allow the laser output into the spectrometer from a few feet away to let the...
  5. mwang

    Huge sale! New things added! :d

    PM inbound on the 532.
  6. mwang

    Quick Question for CO2 Lasers

    That is good to hear :D Definitely will triple check the connections from now on. And not operate the laser with only 4 hours of sleep.
  7. mwang

    Quick Question for CO2 Lasers

    So I was firing up my CO2 Laser again, and I accidentally connected the leads backwards. Realized my stupid mistake within 10 seconds, turned the PSU off and put the leads back on in the right direction. The laser seems to still run perfectly normally. I would assume this did some small amount...
  8. mwang

    For Sale 405nm G2 Pen Laser

    What's the duty cycle on that thing?
  9. mwang

    An Apology for Everyone

    Here are my personal experiences with Eitan: Back in July, 2014, I ordered an Arcane 3W laser from him. Eitan was very responsive, and had all of the properties of a good seller: good customer service, relatively fast shipping for Israel (no fake tracking numbers, got here within 14 days iirc)...
  10. mwang

    FS: Spectra Diode Labs SDL-3450 Fiber Coupled Laser 10W 808nm JDS Uniphase JDSU

    I would be interested if it was easier to power :( Too much of a hassle haha. Good luck on the sale.
  11. mwang

    50w portable CO2 laser !!!

    Was playing around with my 40W CO2 the other day... Too powerful to set it on fire, ironically.
  12. mwang

    Blackwolf's collection liquidation sale *pic heavy*

    How much are you asking for the 405nm Blord build?
  13. mwang

    Tungsten Hosts?

    The alloy my block is made of is used as a bucking bar: dampening the shock of putting rivets in the manufacture of aircraft. It is designed to withstand massive amounts of shock continuously for years. What was the alloy that your ring was made of? Are you sure it is not tungsten carbide? Many...
  14. mwang

    Tungsten Hosts?

    The key is to use sintered tungsten alloys such as 95W 3.5Ni 1.5Fe. I have a block of this: it is extremely dense, 18 g/cm^3, and is not as brittle as pure tungsten, yet almost as hard. I have literally thrown this as hard as I can on cement and only a few minor scratches resulted. It would me...
  15. mwang

    What was your first Laser?

    First one was a red keychain pointer I bought at Fry's. Second one was an ~75 mW green pointer. Got hooked after that, and bought a 700 mW 445 nm.
  16. mwang

    WTB: Beam Expander 532nm >5X

    Thanks for the link! I'll shoot the seller a few questions. Meanwhile I'm still open to offers! :)
  17. mwang

    WTB: Beam Expander 532nm >5X

    I'll be using it with my 1.3 W CNI labby. It'll need a clearance of at least a diameter of 5 mm on the input side (to be safe). I'll measure the exact beam aperture diameter later today. I'm willing to pay <$250 for a good one? I can't afford buying a new one from EdmundOptics.
  18. mwang

    WTB: Beam Expander 532nm >5X

    Hello all, I'm looking for a beam expander for 532nm lasers that is >5X, preferably 10X. Please PM me an offer if you have one to sell. :) EDIT: The beam expander will need to have at least 5 mm diameter at the input.
  19. mwang

    Map of Members with Access to Laser Power Meters

    You can add me, 95051, 5W ophir nospin lpm, I'll test any laser up to 5W.




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