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Looking for yellow laser

ZRaffleticket

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Yeah I'm still working with them on a date for a restock. Currently "probably closer to end of april". Sounds to me like they only have the capacity to make 10-20 at a time. I've expressed interest in 555nm, 561nm and 574nm to them.
 



CurtisOliver

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Yeah I'm still working with them on a date for a restock. Currently "probably closer to end of april". Sounds to me like they only have the capacity to make 10-20 at a time. I've expressed interest in 555nm, 561nm and 574nm to them.
Sounds like they may produce the crystals directly themselves? Can you ask what Crystal they use? We could only speculate. It would be nice to put this to rest and would love to do more research into it. Might open up a rabbit hole
 

Encap

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Yeah I'm still working with them on a date for a restock. Currently "probably closer to end of april". Sounds to me like they only have the capacity to make 10-20 at a time. I've expressed interest in 555nm, 561nm and 574nm to them.
Continue to stay with them and asking--can't hurt.

They have been saying "maybe in a month" for a couple of years now even to their commercial manufacturing customer Opt Laser who developed product ready to go to market and who would buy commercial quantites of those modules if available. No dice as of 2 yrs ago--still no word that the products are on their screen yet.

My guess is those crystals and module products using them is a minor effort/slow boat effort at best are not a business priority for them as the can make a lot more money a lot quicker/faster on other proven fully developed products with already established strong markets and sales for those products.
 
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ZRaffleticket

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They did make a batch of the pulsed 8mm 561's. I passed on them then they sold out. They are still pumping things out, just very slowly.
 

CurtisOliver

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Nope it is not LiLuF4, well at least not as like in that thread as the pump wavelength is completely wrong.
The pump is 976nm which automatically lends itself to praseodymium doped crystals (Pr:xxx)

And as I just looked up Pr:LiLuF4 I can rule out known visible combinations in the yellow/green to yellow part of the spectrum.

What we know is that the crystal has to be able to be pumped by the 976nm. It is a self doubling crystal (SFD) so no external frequency doubling crystal is needed. And the crystal needs to have a broader spectral width than that of typical DPSS's you see, verified by member spectros and the sellers looser wavelength listings. These crystals don't produce narrow spectral peaks like you expect from some solid states. Some headway was found on what crystals it might be in previous threads. But as I said, it would be nice to put the speculation to rest.
 
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ZRaffleticket

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Their ~545s are 808nm pumped.

I have an opt head thats 976nm pumped, but I also have a ~575 thats 940nm pumped. Hard to say its only one crystal.
 

blueasthesky

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You’d think with better technology yellow pointers would be made cheaper and stronger.

Oh well :/

-Alex
 

CurtisOliver

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Their ~545s are 808nm pumped.

I have an opt head thats 976nm pumped, but I also have a ~575 thats 940nm pumped. Hard to say its only one crystal.
Interesting. So 545’s are neodymium doped and that 940nm pumped 575 seems like an experimental multiple doped crystal. Quite possible a co doping with praseodymium and another rare element.
 

Sowee7

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Continue to stay with them and asking--can't hurt.

They have been saying "maybe in a month" for a couple of years now even to their commercial manufacturing customer Opt Laser who developed product ready to go to market and who would buy commercial quantites of those modules if available. No dice as of 2 yrs ago--still no word that the products are on their screen yet.

My guess is those crystals and module products using them is a minor effort/slow boat effort at best are not a business priority for them as the can make a lot more money a lot quicker/faster on other proven fully developed products with already established strong markets and sales
They are selling the laser modules, a few days ago, I bought a 561nm laser from them and it just arrived today they said they have 18 of those modules
In stock
 

CurtisOliver

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This is a different dpss process to that of typical 555/556nm lasers.

Edit: It is still possible you may be correct on the crystal, just not the doping. Nd:YCOB exists, but I have seen a patent using Nd:YGG.
I'm putting my bet more on Nd:YGG for the 555nm dpss. Correct pump wavelength.
 
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RedCowboy

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They are selling the laser modules, a few days ago, I bought a 561nm laser from them and it just arrived today they said they have 18 of those modules
In stock
Link please ?
 




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