Search results

I've been searching for 589nm laser light for the last decade. Luckily circa 2023, we have low power nonlinear optics which can produce similar light... But, prior to that... The best success I ever had at getting something near 589nm (sodium emission line) was to pump a Rhodamine 6G +...

Lame. My email address is my forum username + gmail. If some unicorn wants to drop 4900$ on a batch of these diodes, let me know. I'd be down to grab 2.

@Shmackitup Is this still a purchase option/group buy? I'd love to pick one up, if shipping to Canada is an option.

Yep. Not driving the damn thing without CC output. I've got a buck converter that outputs 1.2v to VCC, up to 20a, with a CC pot coming from Amazon today. Although it's only offering half the amperage necessary to drive the array, it's a step up from the ~10a CC bench supply I've been using to...

Honestly, I could probably just find a 50a output buck converter on amazon for less of the cost of the DIY. I'm always worried about powering on CC buck converters, due to their horrible tolerances, and possible output spikes on power on/off. EDIT: I can't find any buck converters rated for a...

Also, if anyone's wondering WHY I need a 40w 808nm source, it's to pump into an optical train for 808>1064>532nm light, using some homegrown KDP crystals that I'm cutting and polishing myself. 808nm FAP : > MIRROR [T95% 808nm | R 99% 1064nm] > CRYSTAL [Nd:YVO4] > CRYSTAL [KTP to test, or KDP...

This was my concern. I DID say I wasn't super worried about efficiency, but sinking a 100w or so, is a bit outside the realm of reasonability... This WAS my first idea, though... build a cheap 110vac>3v toroid, rectify it with a low voltage rectifier, clean the hell out of its output, and...

Hey guys, long time no post. I've got a Coherent branded FAP 808nm +/-3mw source, rated for 40w of optical output. Based on the datasheet it has a Vf of <2.2v for the array. Its threshold lasing current is ~9a, (mine begins to lase around 8a, but my bench supply fails after 10a, so I can't...

I think the title is pretty explanatory. Background: I'm designing my own ESP8266 based PWM 3 channel driver. I'm using a 0-1500ma CC driver (LD06AJSA) that accepts a wide-band PWM input. I'll be using the ESPs PWM output pins for duty input to the CC board. Question: Let's say I'm giving the...

I know this is a bit off topic for the typical use of LPMs, But I need to set up a variable intensity UVA-UVC source, using multiple LED diodes at discrete wavelengths, from ~400nm to ~280nm. I do realize 280nm is the high-end of UVC, but the source in question doesn't need to go lower...

I bought a small cash box, and some high density foam (think like, the BS audio absorptive foam from amazon). 30$ all together One key in my car. One key in my main safe (mainly documents etc.). Then I mounted the cash box using a few N52 magnets to the bottom of. a pullout drawer in a metal...

Make sure that CNC is perfectly calibrated. I can't get traces smaller than .5mm on mine that can handle more than 35ma without burning out (generic boards/resist, obviously a thicker copper layer would help, I'm buying the <1$ boards for very LV applications). Works well, but it's a slow print...

Are you mounting the diode to a CNC/printer and sending it g-code? otherwise, masks with a proper lens, and a 15$ UV 10w LED might be a lot less hassle (afterall, it's how Intel-Israel does their ULV masking for 30 billion transistors haha, (exactly like that, with a 15$ LED -_-) But you're...

Why not go with any ~400nm 3w LED source, usually comes with a driver too. Throw it on a heatsink, and put the bottle over top of it.. 5-10$ on ebay, with better dispersion (will light the whole bottle). But, if you want to see the *line* of fluorescence in your tonic, obviously the 405nm diode...

Yeah, I mean, we can definitely try and help. But the attitude so far in this thread has been somber at best... and for good reason. Almost any sufficiently powerful laser can burn something 15-20 ft away, by adjusting it's focal point, and selecting the correct colour target (obviously, for...

Nope, haven't tried it - but assuming the absorption spectra of the dye you're using matches the diode's output... you should be fine. AFAIK you'll have to combine the 2/3 beams, before you pump your media, though, or you'll get multiple emissions, and not a summed output. Unless, well, that's...

405 is NEAR UV. It will cause most things that would fluoresce under a blacklight, to do so, while still having a visible purple dot. True UV sources, say <400nm are almost invisible to the human eye - which makes them quite neat. I have a 375nm and 365nm LED (both are 50w) and while I can...

I'm running all my 488's off cheap 2$ ebay drivers at around 200ma. Honestly, the poor electronics on the board are the limiting factor, as the drivers overheat. I can still see the beam in the dark so, eh.

You should have no issues using a lens to focus it to whatever depth you like. (just for god's sake, use a glass one if you're going beyond 30mw or so). If you're going into the higher power ranges, use a lens that's coated for 405nm, they're glass, and around 10$ on amazon. I don't know why...

I used to pop those diodes until I went with the LM317 and a decent input voltage. There are thousands of 1$ 100-500ma CC drivers on ebay that would work for you, but again, input voltage is important (for the heat of the driver). Any reason why you want to DIY a 1-2$ part?