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FrozenGate by Avery

574nm 36 mW Yellow Laser

In lumia it looks more yellow than green. 575 looks slightly orange in lumia. I’m using 532 green
 





Same here to both kecked and Ultra.
565 does look nice and yellow through lumia, especially with 490 cyan or 450 blue.
I have 2 of the 575's on order for two weeks now and they tell me not in stock yet as well.
 
Yes, it's very disappointing that the 575nm lasers are out of stock at the moment. I'm very glad I got one before the storm gates opened and the flood for them started. On a different topic, I got a 428nm laser diode today drop shipped from a member here to measure and set up with a driver in a module. This diode cost $500.00, so will be using extra care while working with it.
 
Yeah I'm glad I got mine when I did.

428nm is no secret, that's mine. Can't wait to hear your thoughts on it!
 
I will let you know everything I can glean from this diode ASAP, Zach. I'm not going to rush it as it is quite an expensive diode.
 
I ordered 2 last units from the seller, I miss my yellow, because one was destroyed in the name of science :D


He labels them 50mw, I’ll see if this is true, I’m the owner of LPM right now.:beer:

BTW, Tero, your 473nm labby measures 255mw , nice!
 
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paul1598419 said:
Yes, it's very disappointing that the 575nm lasers are out of stock at the moment. I'm very glad I got one before the storm gates opened and the flood for them started. On a different topic, I got a 428nm laser diode today drop shipped from a member here to measure and set up with a driver in a module. This diode cost $500.00, so will be using extra care while working with it.
Click to expand...

Is good to know that OPT in China is going to make more and more powerful versions of 575nm as well.

I would guess that the limited stock was just a run of sample production and that the product has not become a popular one to date for several reasons among them people want garden and Holidays displays in white or RGB much more so than they would want "yellow"
Looks like they are seeking orders for thousands from a mass market commercial marketer/reseller and not very interested in selling one at a time samples. I mean where are they going as a manufacturing company with a few onesie and twosie sales to an extreme niche laser enthusiast market and as stage lighting RGB projectors can create an acceptable illusion of a yellow wavelength--so...
 
Ultracrepidarian said:
The Chinese seller said that he will let me know when 575nm is back in stock.
Click to expand...

Last I heard from Freeman he thought that they should get them within a few days, of course he said that a few weeks ago also :(.

Regarding the orange line in these, am I correct in my understanding that they are only in the 575nm ones.
Has anyone been able to spectrometer this orange line yet?
 
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Has the pump diode wavelength been ascertained? For this one or the 561 nm laser.


Don't know if this info is a lead or not. I'll leave that up to more knowledgeable members.

Two separate abstracts. Link applies to the second abstract.

We report an end pumped single transverse-mode (TEM00) yellow laser based on Dy3+:ZnWO4 crystal. The pump light is InGaN blue laser diode at 450 nm with the maximum power of 1.5 W. A 3 cm length Dy3+:ZnWO4 crystal served as the gain medium. By way of the square filter, we discuss the TEM00 properties. In continuous-wave operation and single transverse-mode, a maximum output power of 0.110 W and a slope efficiency of 13.0% are achieved at an emission wavelength of 575 nm.
Dy3+:ZnWO4 Yellow laser Single transverse-mode
_______________________________
We present what is, to the best of our knowledge, the first report on yellow-green laser generation based on the frequency doubling of the 1.1 μm transitions in Nd:YAG ceramics. By employing an 885 nm diode laser as the end-pumping source and a lithium triborate crystal as the frequency doubler, the highest continuous wave output powers of 1.4, 0.5, and 1.1 W at 556, 558, and 561 nm are achieved, respectively. These result in optical-to-optical efficiencies of 6.9%, 2.5%, and 5.4% with respect to the absorbed pump power, respectively.
https://www.ncbi.nlm.nih.gov/m/pubmed/26193034/
Click to expand...
 
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I don't know if the orange line came from OPT Lasers or the Australian seller. Mine has only the one line and it is narrow and very stable. I suspect any 610+nm lines are only seen on somewhat defective units. I have two cheap 532nm lasers that have multiple lines. One has 4 lines, the other, 6.
 
I have three from Australia land and all are sharp lined single and stable. The 565 is the best actually. Widest I’ve seen it 3nm on a side and that could be sensor saturaton as it’s one peak. I’ll hit it on a grating and look at the expanded beam. Problem is if I form an external cavity it will sharpen up.
 
The orange line from mine came from the Aussie seller. Mines with Rich right now and hasn't been measured
 
An attempt to make it handheld. Rich needs to experiment a bit to figure out how to electrically isolate the module.

I have the blitzbuck picked out.
 
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