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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...

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.

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...

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...

PM inbound on the 532.

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.

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...

What's the duty cycle on that thing?

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)...

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

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

I have a 594nm HeNe :)

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

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...

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...

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.

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

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.

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.

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