Le petit deathstar

[swamidog]

i've been working on a little project with laserwizardry...

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and some video.... (sorry we didn't have any ballons to try popping)

[mixedgas]

c'est très magnifique
Maintenant, où sont les stormtroopers

Steve

[swamidog]

we sent them out for pizza.

what's the chance of us being able to pump dye with this? this is doing roughly 12 watts.

c'est très magnifique
Maintenant, où sont les stormtroopers

Steve

[dsli_jon]

we sent them out for pizza.

what's the chance of us being able to pump dye with this? this is doing roughly 12 watts.

Slim to none.. at least not Rhodamine / SulfaRhody.. wrong 'color' for absorption-efficiency with that particular-goo, and, unless using a dye-jet, not enough power to 'tip the scales' on threshold, either... ie: we've pumped the dye-cels with 18W of CW 532, at the 'proper' spot-size to tip threshold, and, even though the 532 is a much more ideal ~ for the Rhody... zippo... it's not till you get the hi-peaks of Q-switching, that you can get the cels to give it up... worse-so, with a 445-attempt... but if you had a jet, and a *reeealy*-small spot-size..?? ..Still, the blue is 'not right' for efficient-absorption with Rhody...

Now, the P'Fessor will correct all my wrong-data... Thanks, Steve...

..But, still... Knarly-werk, Guys...

j

[DZ]

Wow that's nice! Great work guys!

[mixedgas]

Never say Never, I'll say NO way and you guys will go and do it on me.

Ok, a lab grade dye laser has been thresholded by a PL member at ~500 mW of 532. He could play with the concentration of the dye to get it just right, and he had a CR599 jet based laser with the right optics (I went Postal and shipped him a high gain output coupler ). He was getting lasing, but he did not get power conversion. He also had the luxury of picking his dye and additives. He is a master of flashlamp pumped pulsed dye lasers.

I told him it would probably not work till a watt and a half.... However he had a TIGHT ring dye laser, a very TIGHT pump beam, and God must have sent him a tailwind, because he is a Watt below the published AR+ threshold for that laser. HE also had serious patience.

Some guy in a scientific lab got around 1-5 mW with a 1W 445 pump, after much work. He did not, however, have a 12 Watt pump.

First test would see if you can focus all that to a 100-200 uM spot, with a mirror. Call Exciton and see what they have that has a adsorption curve at 445.

It will have to be a flowing jet laser.

I'm a bit more of a optimist then Jon, 1 in 9 odds, if you spend a lot of time on it and can get all the beams into the focal spot.

It will be aligning each laser on a more personal basis, and I dont know if you have the right mounts for that.

The pump fold and focus mirror is a 7.62 mm diameter optic with a tight curve. Can you even fit on the mirror?

Karl does have a nice source of carrier materials for the dye.

I though about it the second I saw the beam pics.

Dye, maybe not. Ti:Saph, yes. However what would you do with a watt of 690?

I have a customer that wants a corrected scientific 2 watt blue, with spares, so we may see soon, I could send the spare blue module to New York to the dye guy for tests.

You guys did not go for compact, so its heartening to see that unit could bolt onto a big green.



Steve

[swamidog]

It will be aligning each laser on a more personal basis, and I dont know if you have the right mounts for that.

all the knife edging mirrors are on mm1's. we could cheat the knife edge alignment to a very small near field spot.

The pump fold and focus mirror is a 7.62 mm diameter optic with a tight curve. Can you even fit on the mirror?

if not 100%, very close. the pbs cube we're using is only 10mm per face and there's no beam spillover.

Dye, maybe not. Ti:Saph, yes. However what would you do with a watt of 690?

nothing... i'm not interested in being practical. it would just be a really gratifying milestone in my laser experience.

[planters]

I do believe that J. Singer was just barely successful with the low power 532 pump source. At the 445 wavelength RG6 may have an absorption coefficient 10 to 20 x lower than at 532, nevertheless it might be possible by increasing the dye concentration to increase absorption depth. Also, modifying the collimation of the pump beam may be key as you trade off spot size against depth of focus. The hard part is that you don't know, even with everything "maximized" if your even close. So let me make a suggestion. Do you have access to a CW Argon that would let you set up the dye flow cell and get it lasing? Then ADD the 445 composite beam through a dichroic and optimize total output. Then if it looks good see if you can walk off, maybe fully, the Ar contribution.

[swamidog]

we set up the little beast outside for the initial far field alignment. then we lit a sparkler.... for science

[steve-o]

That's a whole loota blue

[swamidog]

That's a whole loota blue

not enough..

[kl79]

hello, could you please tell us more about diode intensity ? and the temperature of the diodes ?
In other words...is it safe without tec ?

(and we don't say "c'est très magnifique", we just say "c'est magnifique" or "c'est très beau" )

[swamidog]

we're driving the diodes conservatively at about 1.25A each. the mounts get warm, but not hot. it will be run in a beam table with a light duty cycle and with forced air cooling. no tec needed. i'm sure we'd be fine running the diodes much hotter, but better safe than sorry.

hello, could you please tell us more about diode intensity ? and the temperature of the diodes ?
In other words...is it safe without tec ?

(and we don't say "c'est très magnifique", we just say "c'est magnifique" or "c'est très beau" )

[mixedgas]

(and we don't say "c'est très magnifique", we just say "c'est magnifique" or "c'est très beau" )[/QUOTE]

Pardon/I'm sorry.

I'm sure the late Miss Miskovitch, my French instructor, some twenty years ago, would have corrected me. If she had spent more then one week a year in Paris a year.

Steve

[steve-o]

hello, could you please tell us more about diode intensity ?

The intensity of this particular rig , if the beam were to hit a wall, would probably start a massive fire that would burn the entire house down .. :/

[swamidog]

worked like a champ!

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