Activity Stream

Glad to hear the AD633 rotation circuit is working. That is a fun and exciting circuit, not previously available, to my knowledge. Thank you laserist. You should get an award for your drawing. Kevint: Did you get the continuous turn sin cos pot supplying the rotation signal? I haven't tried using...

To the best of my knowledge that is the first picture of the inside of one on the internet. Steve..

... they can be activated for a short time (some ten seconds) without damage ... or some minutes, when below 10% nominal current, what's mostly the threshold, where the diodes starts emitting ...

Next step is for me to learn how to cut & polish fiber! Can these machines run for a short time without being water cooled or is it to risky to even turn on check them without water cooling in place first?

I test 6w rgb laser from rgb laser system ungary into a 3dlp video projector I meausrement 500 Lumens of beautiful color , for 30k lumens you maybe need 36watts

Congratulations Mike! Beautiful, amazing work. Well done! Greg

... best wouldbe to use the original fiber -- depending on the type and without AR-coating you wouldn't be able to use the max. power - or the end will explode ... here splicing a piece of the same fiber with already attached collimating head would help ... otherwise you have to learn high...

Agree, hopefully it is CW as opposed to pulse - I had assumed it was CW but I don't have enough info to know for sure. I suspect if it's pulsed then it's going to be hard to get up and running with no control over the rest of the electronics. I did try to find manuals, etc to see if they have a...

AFAIK there are some ten 70W@975nm-diodes used for pumping the resonator fiber. The diodes can be driven with high enough current and will emit up to around 3x the stated fiberlaser-power when combined. With some luck the type is a CW-laser, not a pulsed -- here I have a 130Watt CW-fiberlaser...

Apologies for digging up an old thread, but I think is the post relevant place to post my question. I recently bought (waiting for delivery now) an IPG Photonic P30-002921 Laser Module YLM-900 (TSC) - which was pulled from a working system. My thinking was I would try to revive this into a...

... nice! :cool:

In reply to a private communication, which may be of general usefulness: See CYGN-A post #53 for laserist's original post of the AD633 rotator schematic. I can report that when I correctly built what is described here, it worked, as seen in CYGN-A post #64. Notice I used a rectangular cycloid...

You ship me stamped anode and cathode weld flanges, which I know you have, I ship you 7x11 dielectric mirror sets ? Steve - - - Updated - - - You ship me stamped anode and cathode weld flanges, I ship you 7x11 dielectric mirror sets ? Steve

I bought a house and moved to aloha about 2 years ago. Down one vacuum system, just have my thermal evap system that i am adding an ion gun to. Also now have a FIB

Hi Dr Strobes. I see no one has replied to you but I'll say this. Buying a laser of 8 watts in power for $600 is unreal! Almost too good to be true. Over the years lasers have come down in price but that says to me it's fake or such poor quality it will be laughable. I hope I'm wrong. ...

Hey nice to meet ya! welcome to the forum! lots of great people here. I'm over in Troutdale, similar hobbies, have some home built rgb projectors. I work in the semiconductor industry as a equipment engineer for pvd, cvd and sputter tools. I like your toys. the vacuum toys are cool. One day id love...

Here it is. I took this photo around probably 1979.

Years ago there was a store called Efston Science that had a box of inventory from a supplier called Edmund Optics. There were random new components such as dichroic optics and gold surfaced concave mirrors, and they had a well stocked science project supply area which included diffraction film,...

Nice improv, Greg. The audience never knows what's actually going on behind their backs. This is why the wizard always hides behind the curtain. BTW, where can I get some of those diff gratings for my rig? BR Roj

Cost and availability of materials, ease of assembly, bang for buck, being able to flip a couple of diffraction effects in front of the projectors makes a show disproportionately more interesting. Also, before it goes away, listen to this show intro mixed from bits of shows including Crystal...

Thank You for the files

I am wondering if its powertrack mirrors or something in the UF cavity... the diodes are only 800 hrs of use and head is 1400hrs. The issue started when there was sudden change in wavelength..

14.7W at over 40A sounds like either diodes are end of life or something in beam delivery optics got broken.