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LED powered lasers (article)






rkcstr

rkcstr

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So I'm guessing they're talking about a sort of LED-pumped polymer that produces a stimulated coherent light from the energy of the LED? What would they call it? LEDPP ;D
 
rocketparrotlet

rocketparrotlet

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Sounds like this would be able to tune from violet to blue. That's very interesting.

Now wouldn't that be the best, being able to switch from blu-ray to blue to indigo...awesome.

-Mark
 
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This technology does seem interesting to say the least! I know a lot of people that would kill for cheep, cw, power that has that large a tuning range! Although I have a feeling these lasers would be highly multi mode and probably have generally terrible beams specs.

As a side note, our own laser ben has pumped ordinary yag rods with leds here is a post about it on pl
 
GooeyGus

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... said:
This technology does seem interesting to say the least! I know a lot of people that would kill for cheep, cw, power that has that large a tuning range! Although I have a feeling these lasers would be highly multi mode and probably have generally terrible beams specs.

As a side note, our own laser ben has pumped ordinary yag rods with leds here is a post about it on pl
Click to expand...

not exactly ordinary yag rods in the sense that most of us know, but pretty close!

They are CTH:YAG rather than ND:YAG. CTH:YAG has high absorption in the blue spectrum, so Ben is using some high power blue LED's to pump these little CTH:YAG pieces. It should lase at 2.13 microns, rather than 1.06 microns like regular nd:yag
 
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ElektroFreak

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I think it would be far-fetched to think that these lasers would be tunable in real-time. Most likely they would be set at the factory to a certain wavelength. The design is tunable, but I doubt that the individual lasers will be.
 
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rog8811

rog8811

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Most likely they would be set at the factory to a certain wavelength. The design is tunable, but I doubt that the individual lasers will be.
Click to expand...

I have a small twiddly screwdriver in my pocket and I am not afraid to use it ::)

Regards rog8811
 
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suiraM

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GooeyGus said:
not exactly ordinary yag rods in the sense that most of us know, but pretty close!

They are CTH:YAG rather than ND:YAG. CTH:YAG has high absorption in the blue spectrum, so Ben is using some high power blue LED's to pump these little CTH:YAG pieces. It should lase at 2.13 microns, rather than 1.06 microns like regular nd:yag
Click to expand...

I was thinking about trying that with Ti:Sapphire crystals, but have been unable to obtain any this side of $500, which is a bit much just to test to see if it works. High intensity LEDs use a blue wavelength that is almost perfect for pumping Ti:Sapphire (460nm, IIRC), and you get 5W LEDs cheaply (though they obviously don't put out 5W optical energy).

I would imagine Ti:S is less expensive than CTH:YAG, though?
 
Switch

Switch

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GooeyGus said:
not exactly ordinary yag rods in the sense that most of us know, but pretty close!
Click to expand...

Well changing the Nd to CTH makes all the difference since that's the actual active stuff that does all the lasering(that's why Nd:YVO4 does the same as thing as Nd:YAG).The YAG.YVO4 is only an optical medium to hold it in.Btw, can't you pump Nd:YAG with 808nm LEDs?You'd have to get them pretty close to 808nm but it should be possible....

As for the polymer laser, that's pretty cool, but too bad the article isn't more detailed (i'm too lazy to search for other sources now anyway). I'd like to know what kind of power, beam specs and unit size would they be expecting.
 
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