Creaky Old Award Winning Bastard Technologist
New piece of gouge.
Qswitched pumps do not need triplet state quench additives, only CW lasers when going for power. This comes from Exciton's scientist.
Obtainable red power in the Qswitch 532 pump case is solvent dependent.
Binary mixtures are for not for 532 Qswitched pumps for the most part.
Numbers for conversion were shockingly high in the LS type case. 30%, and some have obtained higher.
Steve
Last edited by mixedgas; 12-03-2010 at 14:50.
Senior Member
Well you don't need a quench additive provided the flow rate is sufficient to clear all the dye from the spot before the next pulse, so I would guess that running a dye head on a LS would have a fairly well defined maximum PRF.
How much of a limit this in practise I don't know.
Solvent choice and its effect on conversion efficiency is in the literature, but some of them are spectacularly nasty chemicals (Especially when combined with dye that is bad news to begin with).
There is much good discussion of solvents and dyes here: http://bcp.phys.strath.ac.uk/ultrafa...laser-dyes.pdf
Regards, Dan.
Senior Member
Thanks for the PDF, definitely save for future reference.Originally Posted by DMills
Quenching additives are only for CW. With a Q-switched pump, even if it's running at a high rep rate (at 10kHz or so), a dye cell is still acceptable.
Creaky Old Award Winning Bastard Technologist
Exciton actually suggested the propylene carbonate for the DCM, for peak power.
Considering it is used in lipstick, that is a nicer choice then say, DMF etc.
Steve
el gringo loco
hey there G-man...
Ook, so, as-promised, was in the shop last nite takin some pix for some other posts, and I fired up one of our dye-units (..the 'tired' one, that I was discussing tryin to 'improve-on' the dye-mix, etc, in this thread...) and, yep - she's still a hottie!
...so, njoy the pix, and - sorry about the 'obnoxious' DSLI-logo all-over the shotsbut, if 'DJ StickyFingers', there, wants to steal my pix again / post on his Flickr-pages or his BSite, he's gonna have to be willing to give DSLI some 'free-press' in the process...
...and if this... http://www.flickr.com/photos/prodjal...7624242336736/ is "12 Watts...", than I'm 'Mother Theresa'...(...I think maybe he just *forgot* the 'decimal-point' between the 1 and 2...
...Here's what 10 Watts looks-like:
... no 'fog', no 'time exposure', just LOTS of Red...
...10W o' Red with some 'haze' in the room...
...and it was really rainy / foggy out, last nite, sooo....
(...last-shot had a 'slight' time exposure... but I think you 'get the point', eh?
..and, then, I got an *idea*...
..and it was a really 'intriguing' color-mix, cause, in that "Red", you've actually got at least two 'dominant' lines, lasing - you can sort-of see it in this machita-shot - (btw, this shot was only ~4.5W.. I couldn't *take* a shot of the 10Ws in the dark...the camera was jonesing...)
...
...see the 'paired' lines?... not exactly-sure of the exact-nm's, but eye-guess would-be right-at ~630 and then 640 - one was definitely a Red and the other was pretty 'orange', (by-comparison, right next-to the other)...
...interesingly, the 'redder' (guessing-640), was the more 'powerful' line, so, perhaps that clues-us that the LS-mix is likely more DCM than anything... perhaps + some Kiton...
So, yeah - someday, when I have some time (...yeah, right!...we'll see..
cheers...
j
....and armed only with his trusty 21 Zorgawatt KTiOPO4...
Senior Member
hey there G-man...
Ook, so, as-promised, was in the shop last nite takin some pix for some other posts, and I fired up one of our dye-units (..the 'tired' one, that I was discussing tryin to 'improve-on' the dye-mix, etc, in this thread...) and, yep - she's still a hottie!
...so, njoy the pix, and - sorry about the 'obnoxious' DSLI-logo all-over the shots
...and if this... http://www.flickr.com/photos/prodjal...7624242336736/ is "12 Watts...", than I'm 'Mother Theresa'...
...Here's what 10 Watts looks-like:
...and it was really rainy / foggy out, last nite, sooo....
..and, then, I got an *idea*...
..and it was a really 'intriguing' color-mix, cause, in that "Red", you've actually got at least two 'dominant' lines, lasing - you can sort-of see it in this machita-shot - (btw, this shot was only ~4.5W.. I couldn't *take* a shot of the 10Ws in the dark...the camera was jonesing...)
...see the 'paired' lines?... not exactly-sure of the exact-nm's, but eye-guess would-be right-at ~630 and then 640 - one was definitely a Red and the other was pretty 'orange', (by-comparison, right next-to the other)...
...interesingly, the 'redder' (guessing-640), was the more 'powerful' line, so, perhaps that clues-us that the LS-mix is likely more DCM than anything... perhaps + some Kiton...
So, yeah - someday, when I have some time (...yeah, right!...
cheers...
j
i love red my fav colour, looks awesome
Eat Sleep Lase Repeat
Senior Member
I guess you missed the PRO DJA docu-drama on Discovery then?Oh wow, what a nob.
Doc's website
The Health and Safety Act 1971
Recklessly interfering with Darwin’s natural selection process, thereby extending the life cycle of dim-witted ignorami; thus perpetuating and magnifying the danger to us all, by enabling them to breed and walk amongst us, our children and loved ones.
Senior Member
That red looks pretty awesome J
Doc's website
The Health and Safety Act 1971
Recklessly interfering with Darwin’s natural selection process, thereby extending the life cycle of dim-witted ignorami; thus perpetuating and magnifying the danger to us all, by enabling them to breed and walk amongst us, our children and loved ones.
el gringo loco
Hey Andy...
Yep.. it's really 'mezmerizing', isn't it?...
...Dyin to get this Red on a pair of scanners, and make me some 'cherry sine-waves'...
cheers, guys...
j
Senior Member
Holy F#ck. No, just, I have nothing to say...
That is the most red I've seen in once place. I sat there gazing at those pics for a good few minutes. Good work with the photography. And the watermark looks awesome, I've seen worse GFX failures
Personally, it's got quite a bit of orange in it. Not that it's a bad thing, I think it looks rather nice.
In the photos, the dominant line also looks like 630nm, not 640nm. If memory serves me correct the dye used in PDT had an absorption band 630-633nm, so a dominant 640 line would have been of little use. But I could be wrong.
Anyway, thanks for the photos, they've turned out nicely.
But 30W RGB? Bring it on!
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