565nm From LaserLandAustralia

[Lazer2107]

He opened an account on PL to post in MagicL520's thread for these that he had some for sale also. Seems it is all about moving units at the highest price.

MagicL520's is the runned by the chinese company OPT which is selling them for 30usd. Laserkid21 is the Australian seller LaserLandAustralia.

 

[LSRFAQ]

I had a high powered 561 one, but sold it to a friend who really wanted it. About 55 mw for 1.17 amps pumped. Wavelength shifted a few nm longer during warmup, as typical for some solid state materials with wide gain bandwidth. 3 mm beam diameter , about 1,1 mR. Hit around 55 mw. Not a direct doubled diode, not for that price, and I have worked with doubled diode systems. Doubled diodes "wink" as they warm up and need a hideous amount of active stabilization gear. No winking on this guy and the amplitude was rock stable for an open loop system. Beautiful transverse mode, not quite TEM00 but more like Top Hat when expanded.

Deffo DPSS... Nice mode, mine was circular with a slight elliptic shape.. Almost no stray light.

Very stable fringes when ran thru an improvised interferometer of sorts.

I have two of the 575 on order with a combination buy with a friend.

Mine was the Laserlands Austrialia labbie, and I'd order one again in a heartbeat.

Being whom I am, I would not be shocked if he shipped me a hot, clean one, but that was a VERY nice laser.

That was NOT an LED for the naysayers... Trust me on that!

I still have access to it if need be. I'll run a real long analysis on the 575s.

MY friend wanted to recreate a certain type of lumia color mix that you will (until now) only see starting with a 568 or 575 nm krypton, and I was only too happy to oblige. With special optics and lower tube pressures Krypton Ion DOES has a second yellow line.

Steve

 

[Alaskan]

Knowing your stuff does produce better goodies, I think... I ordered a lower power one off of ebay from him because it cost 50 bucks less for only 10 mw difference, but I don't think he was pricing them that way in the past.

 

[Mosc007]

The Australian seller is still peddling those on eBay as "40-50mw 565nm DPSS True Yellow Laser Module".
Down in the description he says "produces a bright lemon yellow color." Is anythng but "True Yellow" :wtf:
The seller says the same thing in his 575nm listings along with the same very green looking photo as well?

Makes you wonder what he is doing--why he is misrepresenting 565nm.
Is not exactly an accurate or honest description. Go figure?

Your post seems a bit unfair.

Have you bought one from him ?

Do you know for fact his specs are not real ?

Or are you calling me a Liar ?


Weather you can accept it or not, the ones he is selling is NOT the same as the ones on Alibaba.


As for the color of the beam. I am sure you have seen it posted here by a few members that taking a photo does not work. 565nm comes out green.

Calling it true Yellow is not very accurate though. Hopefuly 575nm is very close to true yellow.

 

[paul1598419]

The driver is not the same. I am not convince that the head is not. These drivers are a dime a dozen from China. The heads could actually be the exact same head, unless you have seen both and know for a fact there is a difference. At any rate, the 565nm ones are not lemon yellow no matter who they come from.

 

[Mosc007]

The driver is not the same. I am not convince that the head is not. These drivers are a dime a dozen from China. The heads could actually be the exact same head, unless you have seen both and know for a fact there is a difference. At any rate, the 565nm ones are not lemon yellow no matter who they come from.

Are you saying the Alibaba ones have a G2 lens ?

I used two different LPM's on the first 565nm and confirmed 25-30mw. As we have seen the Alibaba ones are about 19mw.

The color description is the only issue I have with his listing.

 

[Encap]

Your post seems a bit unfair.

Have you bought one from him ?

Do you know for fact his specs are not real ?

Or are you calling me a Liar ?

Weather you can accept it or not, the ones he is selling is NOT the same as the ones on Alibaba.

As for the color of the beam. I am sure you have seen it posted here by a few members that taking a photo does not work. 565nm comes out green.

Calling it true Yellow is not very accurate though. Hopefuly 575nm is very close to true yellow.

"Have you bought one from him ?
Do you know for fact his specs are not real ?
Or are you calling me a Liar ?" and so on...
I have no idea what you are talking about? I don't understand your post.
None of the above nonsense has anything to do with anything in my post -- only your last 2 sentences which confirm my observations, do.

I was pointing out the fact of the listing on eBay by the reseller says---"40-50mw 565nm DPSS True Yellow Laser Module" and "produces a bright lemon yellow color" pointing out that is a misrepresentation---a 565nm wavelength simply is not "true yellow" "bright lemon yellow color".
You also indicate same in the last paragraph of your post.

and I also pointed out that the 575nm listing word description is the same + that he uses the same photo in both listings.

Take a look at the resellers eBay listings for yourself.

 

[Skittles]

Your post seems a bit unfair.

Have you bought one from him ?

Do you know for fact his specs are not real ?

Or are you calling me a Liar ?

Having more pictures and info posted about the things he is selling would improve his sales and will give customers a peace of mind, but apparently having good feedback is good enough to keep the money rolling.

He is charging $200+ for the item and all he shows is this:

But hey if it works, it works.

 

[Alaskan]

LOL, yes, I was also wanting to see more, but he did have photo’s of the unit up in prior listings.

 

[Mosc007]

"Have you bought one from him ?
Do you know for fact his specs are not real ?
Or are you calling me a Liar ?" and so on...
I have no idea what you are talking about? I don't understand your post.
None of the above nonsense has anything to do with anything said my post -- only your last 2 sentences which confirm my observations, do.

I was pointing out the fact of the listing on eBay by the reseller says---"40-50mw 565nm DPSS True Yellow Laser Module" and "produces a bright lemon yellow color" pointing out that is a misrepresentation---a 565nm wavelength simply is not "true yellow" never has been, never will be --to "normal" human color vision eyesight--which you also indicate in the last sentence of your post.

and I also pointed out that the 575nm listing word description is the same + that he uses the same photo in both listings.

Take a look at the resellers eBay listings for yourself.

It sounded to me like you are saying his statement of 40-50mw is misrepresentation.

Your general attitude towards this seller seemed off to me. Calling him a Pedler.

I have bought from him a number of times. His English is poor so I understand not much information and hard to communicate with. He does rely on his reputation which is as good as it gets on Ebay.



This thread has been quite upsetting to me right from the start. It seems like I have been banging my head against a brick wall. Getting mocked for posting "Real" information. One Post was litteraly laughing at how stupid the concept of a 565nm Laser for this price is, Inferring I was a fool. Another post said "I will wait till it's someone I can trust"......


It's only now a few members have them that it's obvious they are real.


Next time I won't be the person that takes the risk and posts the first review on something new that seems impossible. I will just enjoy my unique toy and keep my mouth shut.

 

[Alaskan]

 

[kecked]

I have the 565 and it is yellow next to 532. I have on order both the 575 from both sellers. I am happy with what I have so far. Will let you know on the 30.00 ones.

 

[LSRFAQ]

I bet I get called a liar until some of these folks find out that ONE properly chosen crystal can adsorb the pump diode light, lase, wavelength shift the primary lasing line 100 nanometers from resonant Raman scattering, and frequency double, but not be the mythical "direct doubled diode" Without instruments, you would not be able to tell the difference.


Which is one way to do low cost yellow...

Its all in the coatings and how skilled you are at cutting the crystal.

Direct doubled diodes usually need a four mirror cavity with real time feedback. This is to build up enough stored energy at one molecular state or single frequency in the doubling crystal.


For those who asked privately, I'm not doing a teardown on these. I'll figure it out from what I can measure with a spectrometer and mas-INT. I have a rule about not whacking perfectly good lasers with a hammer.

For those of us who know a deep bit about laser hardware, beam propagation, and economics, that yellow-green dot in the Ebay auction picture was more then enough.

At first I though they would be a production over-run or a factory test model. I'm pleasantly surprised they are not.

His shipping and communications were quite good.

Steve

 

[ZRaffleticket]

Thank you for all the info on the direct doubling. I figured it was more complex than sticking a diode in front of KTP and calling it a day, though I never knew exactly what it involved.

Right now our only lead on the 565 is Nd:SFAP (564.5 out - wants 806nm pump instead of 808), though with 575 out at the same time (573 measured here) I'm inclined to believe they're using the same crystal with a slightly different coating, which is part of why I was thinking this was a direct double and not the SFAP as there's only SFG of 3 lines that come close to 575, which is unreasonable for $30 DPSS.

Very much looking forward to what you find. I think these are IR filtered, though I guess that would depend on your spectro as I'm sure whatever low cost solution they have doesn't get it all. May need to tear it down to some degree otherwise.

 

[kecked]

I have to say until I saw the laser I was wary but once I saw it I had to have it. It is green but also yellow and in a mix it is yellow. I am hoping the 575nm is really the yellow I am looking for. Pun intended.

 

[Skittles]

This thread has been quite upsetting to me right from the start. It seems like I have been banging my head against a brick wall. Getting mocked for posting "Real" information. One Post was litteraly laughing at how stupid the concept of a 565nm Laser for this price is, Inferring I was a fool. Another post said "I will wait till it's someone I can trust"......


It's only now a few members have them that it's obvious they are real.


Next time I won't be the person that takes the risk and posts the first review on something new that seems impossible. I will just enjoy my unique toy and keep my mouth shut.

All I see is respect and support on the first few pages of this review.
How can you not expect at least some skepticism on a wavelength that has always been the destroyer of wallets and now all of a sudden its affordable with little information to it and offered by sellers almost no one here knows.
Of course there will be criticism, and it was good criticism.

We are thankful for your review, it was great, but if you wish to no longer post threads like this its your choice.