New experiment for green laser

[trinh hong phuoc]

I removed the IR diode from the green laser module. If I replaced it with a red lpc 836 diode, what would be the result?

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[trinh hong phuoc]

I removed the IR diode from the green laser module. If I replaced it with a red lpc 836 diode, what would be the result?

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[Mosc007]

You wont have any output.

 

[trinh hong phuoc]

You wont have any output.

What happens when I replace the ir laser diode with a red laser diode?Experiment has not been tested yet:làn sóng::làn sóng:

 

[CurtisOliver]

Your laser is a DPSS. You have two crystals in there. The first is a Nd:YAG which outputs 1064nm and the second is the KTP doubling crystal. Now Nd:YAG's major absorption line is at 808nm. The same wavelength as the IR diode you have extracted. It doesn't however accept 650nm, so it won't produce no output at all. So the first crystal will not have enough gain to produce the needed 1064nm for the KTP to double in order to output 532nm.

Edit: The reason why it has not been tested yet is because we already understand the process enough to know it won't work.

 

[Mosc007]

The Crystals and Frequency double only work if you pump them with the correct wavelength.

 

[Alien Laser]

Interesting post some pics if it works, op:

 

[Radim]

Source (paid): http://iopscience.iop.org/article/1...8B59F7D1A76AE2A790F.c3.iopscience.cld.iop.org

 

[CurtisOliver]

Good graph Radim. As you can see the line is pretty much flat at 650nm. You won't get any emission.

 

[Radim]

Thanks, Oliver.

BTW: From emission spectrum it is visible why other beautiful visible wavelengths compared to 532 nm (from 1064 nm) are so inefficient to produce - especially 473 nm (from 946 nm). Also due to many emission lines and frequency doubling (and sum frequency doubling) processes it is nicely visible why Nd dopped crystals are used to produce so many awesome wavelengths in this solid state laser (therefore with larger cavity, better beam specs are reached compared to semiconductor - diode lasers).

 

[CurtisOliver]

Precisely Radim. :beer:
1064 is the dominant wavelength.

 

[NightExplorer96]

Thanks indeed for sharing that graph Radim :beer: :beer:

-Alex

 

[lasersbee]

What happens when I replace the ir laser diode with a red laser diode?Experiment has not been tested yet:làn sóng::làn sóng:

If you also remove the Crystals you will have
a Red Laser....

Jerry

 

[CurtisOliver]

Crystal clear thinking Jerry.

 

[Richie89]

Just replace the IR laser with a 2W C-mount 808nm. j/K
:lasergun:

 

[diachi]

Your laser is a DPSS. You have two crystals in there. The first is a Nd:YAG which outputs 1064nm and the second is the KTP doubling crystal. Now Nd:YAG's major absorption line is at 808nm. The same wavelength as the IR diode you have extracted. It doesn't however accept 650nm, so it won't produce no output at all. So the first crystal will not have enough gain to produce the needed 1064nm for the KTP to double in order to output 532nm.

Edit: The reason why it has not been tested yet is because we already understand the process enough to know it won't work.

It probably isn't Nd:YAG actually, most, if not all modern pointers use Nd:YVO4 for 1064nm.

But yeah... won't work. You'd get some red out of the front, but it won't be a nice spot and won't be collimated well at all.

Just replace the IR laser with a 2W C-mount 808nm. j/K
:lasergun:

You smell that? Smells like Nd:YVO4 burning!