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

Pico green laser module on eBay...anyone tried this?

I don't know if that's a whole PICO module.

BTW, mine arrived. It's very cool. 808 in, 532 out.

I won't have time to do much more testing for a while, but I can tell you a few things:

1) You need a VERY tightly focused beam of IR, which fairly high power, to get 532nm output.
2) It's not exactly *easy* to position it right. I was able to do it by hand, with tweezers, but you definitely need some precise positioning.

* cool fact *
I took an 808nm (cheapo) DinoDirect IR laser pointer, about 900mW, and focused it to a dot at about 1 foot distance. I shot it at the Pico module, and got 532 out. Not a ton, and it was hard as hell to hold steady, but amazinging it was doable. This sort of shocked me because 1) even focused, it's not a tight dot at a foot. 2) I wouldn't have expected the pointer to actually be 808, or close enough.
 





rhd said:
I don't know if that's a whole PICO module.

BTW, mine arrived. It's very cool. 808 in, 532 out.

I won't have time to do much more testing for a while, but I can tell you a few things:

1) You need a VERY tightly focused beam of IR, which fairly high power, to get 532nm output.
2) It's not exactly *easy* to position it right. I was able to do it by hand, with tweezers, but you definitely need some precise positioning.

* cool fact *
I took an 808nm (cheapo) DinoDirect IR laser pointer, about 900mW, and focused it to a dot at about 1 foot distance. I shot it at the Pico module, and got 532 out. Not a ton, and it was hard as hell to hold steady, but amazinging it was doable. This sort of shocked me because 1) even focused, it's not a tight dot at a foot. 2) I wouldn't have expected the pointer to actually be 808, or close enough.
Click to expand...

Cool!

Did you manage to get good output by putting it right in front of an ir diode? Mainly, I mean were you able to achieve tem00 output?
 
benmwv said:
Cool!

Did you manage to get good output by putting it right in front of an ir diode? Mainly, I mean were you able to achieve tem00 output?
Click to expand...

Noo..... but to be honest, this was one of those "Okay, I have family flying in to town 30 minutes from now, but this awesome thing just arrived in the mail, and I want to play with it for 5 minutes" kind of times.

I tried holding it in front of my CNI module's IR C-Mount with tweezers, set to 1A of current (probably around 1W of IR output), and there was green, but not bucket loads. I also, as mentioned, hit it with my 808 pointer.

I would guesstimate that I was seeing 30mW of output in either situation.

But honestly, it was an issue of being able to hold it still enough. I was frequently moving it in and out of the sweet spot. My approach to testing was nowhere near respectable. I wouldn't be shocked if a week from now I reported back, after having properly positioned the module, to find that my experience was entirely different.

One thing is fairly clear to me though - this is meant to be hit with a lot of IR.

That said, I call total BS on this:
http://laserpointerforums.com/attac...e-ebay-anyone-tried-cq-laser-technologies.jpg

3W of 808 in, to 1.2W of 532 out ???

That's just way too efficient for reality, isn't it?
 
Last edited:
rhd said:
Noo..... but to be honest, this was one of those "Okay, I have family flying in to town 30 minutes from now, but this awesome thing just arrived in the mail, and I want to play with it for 5 minutes" kind of times.

I tried holding it in front of my CNI module's IR C-Mount with tweezers, set to 1A of current (probably around 1W of IR output), and there was green, but not bucket loads. I also, as mentioned, hit it with my 808 pointer.

I would guesstimate that I was seeing 30mW of output in either situation.

But honestly, it was an issue of being able to hold it still enough. I was frequently moving it in and out of the sweet spot. My approach to testing was nowhere near respectable. I wouldn't be shocked if a week from now I reported back, after having properly positioned the module, to find that my experience was entirely different.

One thing is fairly clear to me though - this is meant to be hit with a lot of IR.

That said, I call total BS on this:
http://laserpointerforums.com/attac...e-ebay-anyone-tried-cq-laser-technologies.jpg

3W of 808 in, to 1.2W of 532 out ???

That's just way too efficient for reality, isn't it?
Click to expand...

In my CNI-PGL-A its using a 500mW B Mount 808nm diode and iam getting just under 200mW of Pure Green. :IR Filterd: THis is just using i guess a litle better quility Crystal set then you get in cheaper green lasers

So Depending on the quality of IR diode and what these actually can pump i would say its possible.

Remember those are Lab testing with Precise 808nm diodes nd equipment. SO there results will always be for the most part better then ours.
 
And, remember, for the right circumstances, 48% efficiency on optical to optical conversion is possible with DPSS (that is the theoretical max, I believe). So it's not unreasonable to suspect that, with better and better tech, a 40% efficiency would be doable for large amounts of IR. That said... these look VERY interesting. Would make it feasable to make high-powered green lasers by DIYers, possibly even into handhelds (if we can get someone construct modules, etc.). I mean, it's very easy to get your hands on a 1W 9mm 808nm diode, meaning 200mW of green output from these. If we can find 2-3W 9mm can diodes, then we are in an even better place.
 
What about those cheap-ass broken 473nm lab lasers? They have high powered 808nm lasers already wired up and mounted with an assload of beam-shaping optics as well.. All you'd need to do is fix one of those crystal arrays in there.
 
rhd said:
I wouldn't have expected the pointer to actually be 808, or close enough.
Click to expand...

It doesn't have to be right on for the process to work. However the closer to 808nm it is, the more efficient the process works. I've seen cheap, but still working, 532nm pointers with the pump line as high as 815nm before.
 
Usually the crystals are the problem, all the units should have the same approximate pump power, although I can't rule out the possibility of a half-dead pump diode :)
 
Certainly. Point of the matter is that we will need 2W+ of IR in order to make these worthwhile.
 
You must log in or register to reply here.


Back
Top