New Diode

[jors]

hahahah not at this moment
yes, better with 2nd provider
have copper..indium?..nice!
sorry this is going off-topic...maybe a new thread for Praseodymium laser develop?, but time consuming...wallet killer, however a fascinating travel for sure...green+red from a single slab mmmmmm also high power red with good beam specs finally? less pricey then OPSL...possible..
but I'm not sure if worth the effort.... due laser video projectors/cinema industry LDs have fast development...Sure gonna see better red-green laser diodes soon

Great! if you have a couple lying around...I have the Copper slab and Indium sheet ..so let's do it!
Cheers
Attachment 47631 PS. That AR coating looks a tad pricey!

[planters]

but I'm not sure if worth the effort.... due laser video projectors/cinema industry LDs have fast development...Sure gonna see better red-green laser diodes soon

That is exactly the problem. With the rapid development of these direct diode sources, spending a lot of money and time (I'd guess a minimum of 6mo.) to develop a pumped crystal is probably not worth it.

what about a ziz-zag water cooled slab (longitudinally,side, pumped)..say two YLF slabs?

For a few hundred$ and assembling the head out of existing optics inventory then it might be fun. But, for $15,000 to build maybe a 10W orange head probably isn't going to happen. The optical layout in your attachment is very similar to the design for the dye head that I described above with the exception that the pump is focused just....just inside the reflective surface of the flat mirror. The fluid loop is a hassle, but the color is whatever you want it to be, modifying a LS dye head would only require custom windows. This would avoid the exposed dye jet and would be far less expensive. This article is the best I can do without the reader having to subscribe to a service.
http://www.dtic.mil/dtic/tr/fulltext/u2/a275114.pdf

[VDX]

I know it's a tad "offtopic" but since visible lambda fibres have cropped up againAttachment 47610
Attachment 47608Viktor you don't happen to know of a source for 50 micron high power (visible wavelength) delivery fibres ............................ in very small or "one off" quantities do you?
I have to fix an old Argon Ziess retinal surgery setup but can't find suitable replacement delivery fibre! Attachment 47609
Cheers

... I have some broken output fibers of 1070nm-fiberlasers ... could be, they have a core diameter of 50µ.

The fibers of the 975nm pumping diodes have 100µ.

When developing some workplaces for assembling fiberscopes, I've got some 30µ fibers, which are normally used for light-feeding into endoscopes.

Depending on the types and lengths, I could send you some of the broken fibers ...

Viktor

[catalanjo]

@ "Depending on the types and lengths, I could send you some of the broken fibers ...
Better if I open a new thread ... we are way off topic if fibers are not for Bigblu-"nubman" (NUBM44)
Cheers

[planters]

Finished. I'll upload the video tonight or tomorrow morning.

[dnar]

Yes, that is the thread. THanks.

I would not worry. The bottleneck is what it is and you won't change it. But, think about the thermodynamics going on there. If you want to run, say 4 diodes hard, then you're talking about removing 100W of waste heat. The base plate will represent another heat flow issue. I've cooled a lot of modules and when you try to dump 100 W into the base plate it gets warm. I have found that only liquid cooling can keep the base near room temperature. If you want to super-cool the diodes for EVEN MORE POWER then you will have to deal with hundreds of watts of waste heat from the base plate and nearly the same bottleneck at the diode flange. This is due to the TEC's. Only liquid cooling will prevent a significant temperature rise in this situation.

Do not forget the differences between CW in testing and real world laser show duty cycle... In reality during a show the duty is much lower that 100% due to colour variations and effect modulation.

[planters]

Do not forget the differences between CW in testing and real world laser show duty cycle... In reality during a show the duty is much lower that 100% due to colour variations and effect modulation.

True, but also remember that my testing is in a 20C lab with CLEAN heat exchangers and no installation obstructions.

[kecked]

462nm yes or no?

Here is something to think about. At what output do these higher power diodes start lasing. IE is the low current performance non linear. If I use this diode and run it at 500mw in my livingroom am I sacrificing low power linearity and better off with lower power diodes? Wonder if that is the case to combine a single mode lower power with the higher power so it takes over on the low current end when the big boy quits.

[DTR]

462nm yes or no?

Nope 450-455nm.

[dnar]

Nope 450-455nm.

A slight improvement on 445nm, but is it noticeable?