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PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please sub

Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

I meant the big open rectangle shaped holes, but yes, I see what you are saying about the threaded holes. I was hoping this unit had a SHG crystal in one of those two gold holders with TEC under them, I expect one is a SHG and the other a vanadate rod.
 





Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

Alaskan said:
I meant the big open rectangle shaped holes, but yes, I see what you are saying about the threaded holes. I was hoping this unit had a SHG crystal in one of those two gold holders with TEC under them, I expect one is a SHG and the other a vanadate rod.
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Vanadate is in the sort of triangular shaped mount. The other one I think you're talking about is a Q-switch. The SHG crystal(s) maybe in the round component that looks sort of like a crystal oven.
 
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

There are two separate gold triangle mounts. I believe the oven has a LBO THG crystal in it for UV out. I guess there isn't an intermediary conversion from 1064nm to 355nm, otherwise it wouldn't be a THG, but why two rod holders when DPSS if it has a crystal oven?
 
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Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

Alaskan said:
There are two separate gold triangle mounts. The oven has a THG crystal in it for UV out. I guess there isn't an intermediary conversion from 1064nm to 355nm, otherwise it wouldn't be a THG.
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You mean here?

39e58b64-7404-4a71-bede-9881022bff77


Urru7Pq.jpg



Might be two separate chunks of vanadate, but likely just one long piece and that's just how the mount is designed. Not going to be a doubler in there.

Operation at 355nm is SFG of 1064nm+532nm, not SHG or THG.
 
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

Yep, I was thinking that was vanadate, and the other one feeding the NLO crystal in the oven a SHG. However, it's temperature in that triangle holder isn't as accurately controlled with that TEC under it, so not likely the one feeding the oven has a SHG in it, I suppose. But then, what is that one you circled for?
 
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

Alaskan said:
Yep, I was thinking that was vanadate, and the other one feeding the NLO crystal in the oven a SHG. However, it's temperature in that triangle holder isn't as accurately controlled with that TEC under it, so not likely the one feeding the oven has a SHG in it, I suppose. But then, what is that one you circled for?
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The one I circled is the vanadate.
 
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

I thought so, then that would make the other one a SHG?
 
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

Alaskan said:
I thought so, then that would make the other one a SHG?
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Disregard, I see it now >> What other one...? There's only the one triangle shaped mount and it's for the vanadate...

Also, weren't you looking for something like this a while back? http://www.ebay.ca/itm/LOT-OF-2-LD6...592447?hash=item25cfb5ddbf:g:kpEAAOSwB-1YpiWD

Edit: Wait, never mind, I see the second one now. Both are vanadate. Looks like two Z-fold cavities placed end to end for higher power... That's my guess anyway. Be easier if we knew what model/wavelength this was. Be nice to have a picture of the WHOLE head, rather than several pictures of parts of it.
 
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Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

I hope to have a photo of the whole head in a few weeks, once it gets to my home in Alaska :)

OK, two vanadate crystals which are combined to produce more 1064nm power, I guess. But, the rods are end pumped with 808nm, I believe, or, at least one of them is pumped w/808.. The way the "rod" sits in the holder, it appears they are double end pumped, into each end.

Edit: I can see UV stamped into the aluminum on the output, assuming 355 but I don't know.
 
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Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

Alaskan said:
I hope to have a photo of the whole head in a few weeks, once it gets to my home in Alaska :)

OK, two vanadate crystals which are combined to produce more 1064nm power, I guess. But, the rods are end pumped with 808nm, I believe, or, at least one of them is pumped w/808.. The way the "rod" sits in the holder, it appears they are double end pumped, into each end.

Edit: I can see UV stamped into the aluminum on the output, assuming 355 but I don't know.
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Damn Chris! You bought another crazy lab laser!? Are you planning on building a Deathstar or something? :p

Yup, looks like two vanadates, both pumped from both ends.

My guess would be 355nm too. And LOTS of it. Q-switched too.
 
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

Once I figured out it has two rods in it, I had to buy it. He accepted 400 dollars with free shipping. I hope to have the death star running in the next two years.
 
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

I just now saw this whole conversation. I was in Seattle most of the day and just now got online. That thing is a beast, Chris. From what I can see it looks like it is complete. If it outputs a pulsed 355nm, it could be very intense. I love to see more photos of it when you finally have it back in Alaska.
 
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

Alaskan is building a death star :cool:
 
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

If it is complete, I probably won't be pulling parts out of it and using it at UV instead, but all of the wires were cut off of the case, so I'd need to add all of my own controls and external IR input.

Edit: Editing a question in here the next day might not get attention, but I don't want to double post. Here's a question, if both of those rods are vanadate, why the Q-Switch?
 
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Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

That's a very good question, Chris! Let's hope someone sees it! (I got ya back buddy!) :) So excited to see this monster in full frame when you get home man!
 
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

Alaskan said:
If it is complete, I probably won't be pulling parts out of it and using it at UV instead, but all of the wires were cut off of the case, so I'd need to add all of my own controls and external IR input.

Edit: Editing a question in here the next day might not get attention, but I don't want to double post. Here's a question, if both of those rods are vanadate, why the Q-Switch?
Click to expand...


Same reason you'd have a Q-switch in a laser with a single rod: For Q-switching it! :p
 
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