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Registered Member #1721
Joined: Sat Sept 27 2008, 08:44PM
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Posts: 136
Hello:
One idea which I had a while back was in reference to a possible "Simple Simon" method for CW Dye laser pumping:
Normally CW dye lasers are pumped by using very expensive Argon lasers, and big 532nm frequency doubled Nd:YAG lasers. Nitrogen lasers are great in pulse mode, but wouldn't CW be awesome if it could be done on the cheap? To get a dye laser to go CW you need 2 things:
1. Very high pumping intensity in a tiny spot, in other words a laser.
2. A pumping wavelength which will excite the dye properly.
One evening while playing with my 100mw 405nm violet diode laser, I could not help but notice the incredible effect which occurred when the beam hit a ruler which I had on the counter. It was made from a fluorescent orange doped acrylic material, we defiantly had fluorescence, and a lot of it!!! The next thought in my mind was:
"I wonder if one could use one, or maybe more than one 100mw 405nm diode lasers to pump a cw dye laser? In the same way like you would use an Argon, or a green SHG Nd:YAG laser?"
In theory is seems like this should work, I mean we are not talking about SHG conversion, or a parametric oscillator, which require very stringent beam quality control. For this to work, it would seem like that we only have achieve a high enough energy density, with some simple off the shelf focusing optics, and a normal cw dye laser setup.
My laser cost me just a little over 50 bucks, the individual diodes are only about $20 from this seller, and the service was good, they are also all over ebay. If a few of these LD's were wired in series, then only one power supply would be required. They could even be fiber coupled. Here is where I bought mine if you are interested, the effect of what is essentially a black light laser is good fun!!! just in itself. Please however watch your eyes with these things, the violet wavelength does not appear as bright as it really is, due to the eye's drop in retinal sensitivity at this wavelength. So please be careful, and do not "Stare Into Beam With Remaining Eye" Here is one vendor, I chose this one in part because of his nifty laser diode drivers:
I just do not have the time to try this theory right now, but it may be just the thing for your sons science project, or for the next generation home laser projection system : ) So I figured I would post it.
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Fluorescence and dye laser experiment/demo ideas?
