Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers

Buy Site Supporter Role (remove some ads) | LPF Donations

Links below open in new window

FrozenGate by Avery

561nm Yellow YAG (?) from Lumenis Varia Eye Laser

Want to become a slave to a bank, or several of them? Just let credit card debt rise up so high you can't do anything but pay the minimum.
 





Here's a photo of the YAG for the green 532nm SHG.

The doubling SHG KTP crystal to convert 1064nm IR to 532nm visible green is in the copper mount on the left. The YAG which is pumped with an 808nm IR diode to produce 1064nm IR in the middle, the 20W 808nm diode bar (max power, not what it is running at) on the right side. I am assuming the non-linear SHG crystal is KTP.

The 1064nm energy from the YAG in the middle of the photo is turned around and shot into the SHG crystal on the left from a mirror which would be where the camera is at, that same mirror allows 532nm green to leave the cavity while continuing to reflect 1064nm IR back and forth into the SHG crystal which has a highly reflective mirror behind it.

This is intracavity SHG, the NL crystal could be outside of the IR mirror cavity, but is more efficient when placed within it, requiring less 1064nm power, if I understand correctly.

Screen%20Shot%202017-03-01%20at%208.10.20%20AM.png
 
Last edited:
Alaskan said:
Here's a photo of the YAG for the green 532nm SHG.

The doubling SHG KTP crystal to convert 1064nm IR to 532nm visible green is in the copper mount on the left. The YAG which is pumped with an 808nm IR diode to produce 1064nm IR in the middle, the 20W 808nm diode bar (max power, not what it is running at) on the right side. I am assuming the non-linear SHG crystal is KTP.

The 1064nm energy from the YAG is turned around and shot into the SHG crystal from a mirror which would be where the camera is at, that same mirror allows 532nm green to leave the cavity while continuing to reflect 1064nm IR back and forth into the SHG crystal which has a highly reflective mirror behind it.

Screen%20Shot%202017-03-01%20at%208.10.20%20AM.png
Click to expand...

At the very least, you'll have nice mounts, crystals and other components to reuse if this ends up having any issues. :D
 
Yep, I have spare YAG assemblies for the red and yellow, just don't have spare non-linear crystals.

Edit: Adding a top down photo:

Screen%20Shot%202017-03-01%20at%2010.14.48%20AM.png


Notice there isn't a temperature probe on the YAG crystal, only the diode and NL crystal need to be monitored and adjusted to be at a specific temp.
The diode appears to have a pair of resistors mounted to it for heating, the NL crystal a TEC under it. You can see the wires running to the TEC to heat or cool the NL xtal on the right side, along with the thermistor wires.
 
Last edited:
My wife is amazing to be willing to take these photo's for me while I am working over seas.


Screen%20Shot%202017-03-01%20at%206.13.19%20PM.png


Screen%20Shot%202017-03-01%20at%206.18.19%20PM.png


Edit: a ray diagram - updated with BAW optics identification.

Ray_4_3.jpg
 
Last edited:
Ha, I already updated the photo with more info. For big photo's like that, quoting them makes the thread a bit long? Maybe no one else cares and I'm too, what's the word? I am surprised she hasn't said anything about the stuff I keep buying, maybe because I've been spending so much on that apartment.
 
I've edited my post to not include the photo. :whistle:
Lol, yes you can fill up the original house with more lasers, if you finish up the apartment to get away from them. :D
 
I already have too much laser stuff, but mostly because each item is in it's own box from stuff I've bought on ebay and not unpacked it yet. The question of how I can get it all to Ukraine, if I retire there to live in that apartment, is already a big one. Costs too much to ship stuff overseas if moving.

It's like the 5th time I've edited that photo, I think I'm done now. Spastic editing guy that I am. I just added the YAG output wavelengths, not saying I understand how they get 1319 nm out of that YAG for the red laser, I don't see how yet. For the "yellow" or 561 nm YAG I see what they are doing, filtering out the 1064 nm and only letting 1122 nm through, for the green, of course 1064nm is easy as it is the highest power peak out of an ND:YAG and if you let it alone, all of the power goes to that wavelength.

Another edit to add this from the original ebay listing, in case anyone is interested:

This is a used Tri-Color High Power DPSS laser head with complete intracavity optics.

Installed is a duel fiber optic port.
Cooled by a large heat sinc, ceramic TEC coolers, and fan.

Included is a complete description of the intra-cavity optics and beam control optics.
Schematic of the optics included.
You will know exactly what is inside.
Manufactured by Lumenis
This is a component of the Novus Varia Laser.
Produces a 532 Green, 561 Yellow, and 659 Red beam
Its in great used condition and doesant apear to be broken.


This is a partial list of the intra-cavity optics:
one pump diode for 659 system (20W @ 806nm)
one pump diode for 561 system (20W @ 806nm)
one pump diode for 532 system (20W @ 806nm)

Nd YAG- 1 1319nm
Nd YAG- 2 1123nm
Nd YAG- 3 1064

KTP SHG 659
KTP SHG 561
KTP SHG 532
Click to expand...
 
Last edited:
It's called perfectionism. :p Could you possibly edit again and remove the stray text box to the left. Oh, and also I would like to see the percentage of reflectivity/transmittance for every optical element. :crackup: Only kidding.

Remember that Nd:YAG emits multiple lines at once, but some are weaker than the others. Depending on the line, it may also only become present when involved in a cavity with the appropriate coatings for that line. The YAG will most definitely be outputting 1064nm, but it can also output the 1319 and 1122nm. Oh, with some genius at work, you could split the 1319nm line to create a SFG with 1064nm to produce a 589nm. :whistle:
 
Damn, missed that! Wish I could get 589 out of it, I wonder why splitting that won't work. I read somewhere if you don't filter for other lines that an ND YAG will put most, if not all of its power into 1064 nm. Maybe they just meant that was the predominant line, and there isn't anything more to it than that.
 
Haha. Need to edit. :D

1064nm is the predominant line, however it is possible to get the other lines without anything fancy otherwise we wouldn't have our 589 spartans. Just beam split the 1319 and split the 1064nm and combine them using a coated NLO crystal. It won't be as efficient as if you had one crystal lasing at both, but it should still work.
 
I'd sure like to have some 589nm power someday :)

What do you think those adjustable optics up top in the photo are for between the dichroic mirrors? Just for centering the beams?
 
Wouldn't all of us here. :p If you have the money you can get 200mW+ in lab form.
They could be anything. Corrective optics, waveplates?
 
You must log in or register to reply here.





Back
Top