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FrozenGate by Avery

Where to find a 2400 nm laser?

S

Sucoiri

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Hey guys,

I've been lurking for a little while now, and so far I haven't found anywhere I could buy a mid infrared range laser. I'm trying to do a optical experiment, and it won't work without a 1500-2400 nm 300 mW laser. I'm willing to build a laser to do this, but I can't even find a proper diode. Any idea on where to look?

Thanks,

Joseph
 





I'm trying to make an optical switch using vanadium dioxide thin films. When below 60 degrees C, these thin films are transparent in the mid infrared spectrum. However, once heated above 60 degrees, they become highly reflected. I'm trying to use a high powered laser to heat up the films, that will be powerful enough to be successfully redirected and switch multiple films in series. I've already worked out the specifics of manufacturing the films, I just need to find a high powered mid infrared laser.
 
I wonder if there really are any easily accessible lasers in that catagory...I've seen direct diode lasers in that range, but they're quite expensive... and I don't know of any gas lasers in that area aside from a rare HeNe and they're not powerful enough for heating. As far as I've seen DPSS doesn't go that low...
 
Sucoiri said:
I'm trying to make an optical switch using vanadium dioxide thin films. When below 60 degrees C, these thin films are transparent in the mid infrared spectrum. However, once heated above 60 degrees, they become highly reflected. I'm trying to use a high powered laser to heat up the films, that will be powerful enough to be successfully redirected and switch multiple films in series. I've already worked out the specifics of manufacturing the films, I just need to find a high powered mid infrared laser.
Click to expand...

+1 extremely interesting Joseph,are you looking for 300+mW or a close figure to the 300?

NS+T (NanoSytems & Technologies GmBh) make diodes in those wavelengths but I'm not sure if they would do anything at the power you need.

cheers

Dave
 
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If it'd be impossible to find a direct diode laser of the exact wave length, is there a way to take a 808 nm laser and change the wavelength to about 2000 nm?
 
I think you could try to buy an old YAG Erbium laser it lases at 2940nm and is diode pumped by 980nm diodes
 
Just looking at this, it looks like there are quite a few types of lasers that are in your wavelength/power range. Take a look and see which one is cheapest?

Just thinking that Er:Glass may be your best bet for power.
 
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Thanks for the suggestions about the pumped lasers, I completely forgot to check those. I found some suitable rods, I'll just now have to figure out how to put everything together. One last question, does the output power only depend on the pump, or does it depend on the lasting rod as well?
 
Your outpout factor is going tobdepend on alot more than input and the rod. Alot of it will come down to how much work you put into it as well as the quality of your cavity, mirrors, rod, input, alignment and more.

My suggestion would be to maybe purchase a ssy-1 laser head or an erbium laser head (Assembly may be needed) and get an idea of what you need to do. Meradith instruments sells all the parts you'd need for an SSY-1 and SAM's Laser FAQ has all the info on flash lamp pumped lasers you could ever want.

Once you know what you are doing you could then potentially assemble your own flash lamp pumped laser at the specific wavelength you need and adjust your power to your needs.

Building a flash lamp pumped laser requires alot of reading and alot of patients.
 
Sucoiri said:
Thanks for the suggestions about the pumped lasers, I completely forgot to check those. I found some suitable rods, I'll just now have to figure out how to put everything together. One last question, does the output power only depend on the pump, or does it depend on the lasting rod as well?
Click to expand...

If you are asking the sort of questions you have been asking --your best bet is to buy a complete unit that suits your needs.

Unless it is really really what you want to do you will spend more time and morney reinventing the wheel than it is worth.
 
Is there some reason why the 1550 and 1650 laser diodes are not acceptable? Thorlabs stocks them at 300mW and 225 mW, respectively. There are countless fiber lasers available in this range producing watts of power.
 
I'm going to do more research about the VO2 films to see if I can use a lower wavelength with a diode, and continue research into state systems lasers. Just from reading SAM's website, I think I could manage to do it with a er yag rod and diode pump cheaply. Thanks for your help!
 
Please be very careful with pulsed IR lasers (erbium, yag, titanium sapphire, ruby ect). They are incredibly dangerous even if you do know what you are doing. It only takes one mistake to loose an eye or endup in the ER because you accidentally touched a capacitor.

It seems like you are doing your homework so im sure you will take the proper precautions and understand the dangers involved.

I wish you good luck with your research. :beer:

Jeff
 
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