Senior Member
Hi Arnold,
No, I didn't work at that company / société.
I've sent you a PM with some more info; hopefully that might help.
Let me know if you need anything else or anything I can help with.
Dan
P.S. Sorry to tease, but some more pictures of the laser scanning that awesome green+gold 511/578nm
- There is no such word as "can't" -
- 60% of the time it works every time -
Senior Member
One more thing I forgot to add:
If you're building your own supply / or a CuBr from scratch, this document is quite comprehensive; at worst a superb read // highly recommended for anyone who is interested in CVL theory/design. I'd be interested to know if anyone found it useful.
(Link expired)
Last edited by danielbriggs; 01-25-2016 at 13:41.
- There is no such word as "can't" -
- 60% of the time it works every time -
Senior Member
Dan,
Are the cavity optics on your system stable or unstable?
Senior Member
I'm almost convinced they were stable plano-plano // plane-parallel on all the CVL/CuBr's I've had my mitts on. (Unless the ROC was on the order of meters+, but I find that fairly unlikely)Originally Posted by planters
That might not sound sensible from the outset for alignment of such a long cavity; however the gain on these things is stupidly high. It's really really hard to get the mirrors in an arrangement where it doesn't lase. The OC is plate glass (~4% reflectance), rear is obviously HR. You can take out both cavity mirrors and a healthy tube will *just* about still lase.You could modify them to be unstable, and get about 1/4 of the divergence of that of a stable resonator, but expect a drop in power of ~50%.
As I've said before, these things just want to lase, (and don't care for no stinkin' mirrors!)
Thus... the prospect of needing ultra stable resonator alignment is significantly relaxed; as it works.
Dan
Last edited by danielbriggs; 01-22-2016 at 08:27.
- There is no such word as "can't" -
- 60% of the time it works every time -
Senior Member
Yes this kind of laser has a very high gain and work in superradiance regime like a LE N2 laserI'm almost convinced they were stable plano-plano // plane-parallel on all the CVL/CuBr's I've had my mitts on. (Unless the ROC was on the order of meters+, but I find that fairly unlikely)
That might not sound sensible from the outset for alignment of such a long cavity; however the gain on these things is stupidly high. It's really really hard to get the mirrors in an arrangement where it doesn't lase. The OC is plate glass (~4% reflectance), rear is obviously HR. You can take out both cavity mirrors and a healthy tube will *just* about still lase.
As I've said before, these things just want to lase, (and don't care for no stinkin' mirrors!
Thus... the prospect of needing ultra stable resonator alignment is significantly relaxed; as it works.
Dan
Dan have you tested to remplace CuBr by an organometallique like copper acetylacetonate (159 °C) or copper acetate ( 127°C) ?
I have read that the pulse energy is 3 times more that with CuBr !
After this small CuBr laser works i will work with this Copper Vapor laser 40W http://www.swissrocketman.fr/laser-a...s,fr,3,239.cfm
Last edited by femtoman; 01-22-2016 at 12:33.
Senior Member
I have been experimenting with unstable cavities with the dye because the divergence is really high, but I have found the increase in threshold with the unstable cavity is unacceptably high and the power drops by something like 75%. The super high gain of the Cu laser will accommodate high losses. Id like to see a comparison of these cavities.
Creaky Old Award Winning Bastard Technologist
GG Petrash's book confirms the higher powers for the two salts without added hydrogen, but CuBr is capable of higher power and self regeneration in "Copper HiBrid" lasers. Your dealing with "HIBRID" technology invented by Dr. C. E. Little et Al. The basic core is by Dr. Sabonitov in Bulgaria and fine tuned by Dr. R.P. Mildren et al...
Hence the added hydrogen and additional bromine in the gas fill.
Hydrogen Bromide in Discharge
+
+
Some place I have the docs for the Oxford 40W, if I can still read the hard drive in the old laptop...
Steve
Qui habet Christos, habet Vitam!
I should have rented the space under my name for advertising.
When I still could have...
Senior Member
Arnold,Dan have you tested to remplace CuBr by an organometallique like copper acetylacetonate (159 °C) or copper acetate ( 127°C) ?
I have read that the pulse energy is 3 times more that with CuBr !
I've not done anything like that; it sounds interesting though and I'll read up on it.
My time has been taken up with other things recently, (such as a high power YAG), however on my list of projects for this year is a high power dye laser. More on that in a few months.
- There is no such word as "can't" -
- 60% of the time it works every time -
Senior Member
There are some excellent papers by Zemskov on unstable resonators for high gain laser medium // virtually all modern texts refer back to this work.
- There is no such word as "can't" -
- 60% of the time it works every time -
Senior Member
Hello planters,
I see your nice Dye Laser with 4 flashlamps. Have you picture or video from this laser in action ?
What are the specification of this dye laser (energy flashlamp,pulse duration) ?
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