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Quantum Hall effect created using light - physicsworld.com The article above discusses the QHE was seen manipulating photons. It's a decent read. What I enjoy most is they think the discovery could lead to circuits using photons instead of electrons. Say bye-bye to heat degradation caused by...

Can anyone help me identify these connectors on Coherent HeNe power supplies? I'm not looking for the HV Alden, but the LV input one. I've hunted through Digikey, but doing so is like searching for a needle in a haystack. I want to price the crimper and connectors to setup several of these.

Gas Lasers and Stuff From The Cellar. Melles Griot 05-LHR-911 HeNe Laser + PSU $70 (was $80) or Head-only: $20 (was $30) * Wavelength: 632.8 nm Red; Rated: 2.0 mW; Metered: 1.25 mW Laser Drive PSU * Input: 110VAC; Output: 1450 VDC @ 4-6.0 mA Purchased from LPM member: Cheech226 Includes...

I bought an older (sealed) HeNe from eBay hoping she might lase. I hooked her up to a PSU and I see no output. Not even plasma glow. :yabbem: Poopy. The funny thing is, when I unplug her, I’ve been shocked by the exposed HV connections at the Alden connector - several times in the last few...

I have an orange HeNe that is near of life, outputting <25uW and I thought (after reading Sam's Repair) if I let it cook for a few weeks, its output might improve. One of the things to check, is the emission spectra of the plasma and the output of the tube for "new colors" meaning, signs other...

I'm looking to get some CNC work done. Who do I talk to? I think most I've seen on here are lathe types. Not many CNC types, maybe. I'm looking to build some tiny kinematic mirror mounts, on the order of 8mm x 8mm.

I bought a 2W brown laser diode from a forum member, a while back. It worked great, too, right up until I dropped it. It must be a DPSS. Does anyone know where I can buy more of these unique diodes?

UPDATED 24 April 2013 (see below) This group buy appears to be directly from an OEM manufacturer. I located this host and began making inquiries and Dan Zhu of Long Shining Lasers (lslaserpointer.com) is prepared to offer the following rifle host with all the goodies. Pricing (by color...

No, this isn’t the kind you smoke, unless something goes horribly wrong. (pun intended) Can anyone help me identify this style of potentiometer on digikey.com? I can measure it and see it’s a 2K Ohm pot, but the PCB mount style, is what has me running in circles. I get tons of hits on...

I recently came into possession of a lab laser that had been torn down in an effort to improve the beam specs. This is a LSR635NL-150mW from Lasever.com. She runs from a 5V power supply providing analog modulation. I'm looking at restoring her, since I seem to have all the components to make...

It must be due to the recent Saint Patrick’s Day holiday, because I’ve had a few people ask if I can provide them some pen-style laser pointers in 532 green, equal to the one I use to demonstrate during night-time astronomy outings. Mine is 5 years old and outputs a 150mW. I've had some bad...

I just read an article referenced on another forum about a guy injuring a pilot with his Wicked Laser Arctic. The commentary on p64 suggests the days are numbered for those wanting to buy or own a high powered laser in the US. Too many really dumb people are calling too much attention to the...

I found a lost and forgotten lithium battery to my Ryobi cordless drill that looks like the attached photo. It has zero volts and the smart charger won't charge it and it blinks the error lights. I've been wondering, if I could just get a little current into to the battery, perhaps the smart...

I hope I'm not too late to start one of these. Hey, all. I am a newcomer. Though I've been a member for several weeks, I've failed to follow protocol and start a welcome thread. I am a single parent of two teenagers who are loving science and I'm rekindling my own interest in all things...

I read in another thread that sometimes, even brand new M-140 diodes can give up the ghost, shortly after they are put to use over 700mA. Is it unwise to run new diodes, for a while, on the bench to see if they're going to die young? How long is a reasonable burn-in time? 30 minutes...

I’m trying to build an all analog driver system to drive X-Y scanners for use with some old gas lasers. Back in the mid-1980s, a group of us junior college geeks enjoyed harvesting HeNes and 60X Argons from Surplus Sam of Southern California. Some of us pointed these lasers through galvos for...

Where do the G1/G2 lenses come from? Can they be harvested from sleds or projectors? Were they specifically manufactured for use with laser diodes? Or are they re-purposed optics from another industry? I'm having a devil of a time finding out where they come from.

I've spent a good part of my day, today, scouring the internet for an Oudin Coil. Very similar to a Tesla Coil, only it's more of a hand-held unit emitting high voltage at the tip. I found this one: Oudin Coil with safety switch $199 But the $200 price tag is a little hard to swallow. I've...

I am trying to figure out if one of these mirrors is curved? Or is it just that the two mirrors are not in parallel? The beam seems to end, on the right side, suggesting its bouncing back and forth to infinity. Any comments?

In my ReKe RGB Chi-jector, I am seeing what looks like two (2) 150mW 660nm red diodes combined through a PBS cube. What gets me, is they are not heat sinked, nor fan cooled. In fact, they are wrapped in a rubber foam and pressed into clamps so they don't rotate. Are there red diodes that run...