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

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

Alaskan said:
Anyone know what output power this might produce? The seller said this listing works, but he was told only 1/2 milliwatt output:

Blue Light, 473nm Laser-optical assembly | eBay
Click to expand...

CurtisOliver said:
With only 0.5mW output I would expect that the laser has alignment issues or the pump diode has gone.
2.5W pump power should be sufficient for at least 100mW+ I would say.
Click to expand...


Output from the factory was 10mW with those. They have optical feedback to keep the power stable at around that power.

IIRC, with some adjustment (removal of light feedback, increase in pump current, temperature tuning) they can be pushed up to around 30mW, maybe a little more.
 





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

Really, that low? That's only 0.4% optical efficiency, even at 30mW you're looking at 1.2%. They look like they should handle a lot more than that, but maybe I've spent a bit too long on LPF with us trying to get as much power as possible. :p
If they are after high stability then they would sacrifice the power I guess.
 
Last edited:
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

CurtisOliver said:
Really, that low? That's only 0.4% optical efficiency, even at 30mW you're looking at 1.2%.
Click to expand...


Just because it has a 2.5W pump doesn't mean it's running at 2.5W. ;)
 
Last edited:
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

That is true. But I think Alaskan wants to know how much you could physically get out of it.
 
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

CurtisOliver said:
That is true. But I think Alaskan wants to know how much you could physically get out of it.
Click to expand...


Typically 20-30mW, sometimes a little bit more, after some modifications of course.

Model is BWB-10-OEM, they were produced by CNI. There's a bunch of threads about them from the past. The heads came in a couple varieties, externally they look the same. One version is just a pump diode, focusing lens, two TECs and the crystal set/cavity. The other version has beam shaping optics between the pump and crystals/cavity.

I had the first version with the more simple optics:

KW2Y93N.jpg


OcZj7PP.jpg
 
Last edited:
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

Thanks for sharing that Diachi. :) Nice images. :beer:
 
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

Alaskan said:
Anyone know what output power this might produce? The seller said this listing works, but he was told only 1/2 milliwatt output:

Blue Light, 473nm Laser-optical assembly | eBay
Click to expand...

This is the same unit you and i have bid on before in the past. I was interested in it for the spectrometer in it. It will need some modification, but should be able to get 1nm resolution when done and I have the setup procedure in my files for it. I figured the laser was just a bonus. If you can snag one of these cheap, it should be worth the effort. :yh:

These were set up to have a narrow line width with the spectrometer holding the WL very steady. It wasn't about power, but being right on 473nm and tight line width.
 
Last edited:
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

BW-tek 473 just stumbled across this and since I already have plenty of 473nm goodness at my disposal, decided to list it here for any of those less fortunate. Pretty sure these were able to be adjusted to get a reliable 30mW out of them. And for $50 shipped, this is about as cheap as 473 gets.
 
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

Not a bad deal, but will need a lens as it was fiber optic coupled and as is.....is not collimated.
 
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

CynicalBrad said:
BW-tek 473 just stumbled across this and since I already have plenty of 473nm goodness at my disposal, decided to list it here for any of those less fortunate. Pretty sure these were able to be adjusted to get a reliable 30mW out of them. And for $50 shipped, this is about as cheap as 473 gets.
Click to expand...


Damn, I'd have grabbed that had I seen it sooner! :p

Hap said:
Someone is selling a Fiber-coupled 808 CNI lab unit.

$450 @ 400mW

CNI MDL-III-808/400 Infrared Diode Laser, 808nm, 400mW, Fiber Coupled | eBay

-Alex
Click to expand...

That seller has a bunch of optics related stuff! :)
 
Last edited:
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

It appears to have some problems. It is 11 years old with "low" hours, yet only output 80% of its original stated power. It is being sold for repair or use at less than specified power.
 
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

CynicalBrad said:
BW-tek 473 just stumbled across this and since I already have plenty of 473nm goodness at my disposal, decided to list it here for any of those less fortunate. Pretty sure these were able to be adjusted to get a reliable 30mW out of them. And for $50 shipped, this is about as cheap as 473 gets.
Click to expand...


It's sold already! :whistle:
 
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

Hey, Chris. What about the 473nm DPSS you linked to, there are 7 of then and they have working spectrometers in them that could be repurposed for use outside the laser.
 
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

I've been thinking about that too, been watching these being listed for months now from that same seller, sometimes he starts them at 5 dollars on auction, but they keep getting bid up to 50 or more.
 
You must log in or register to reply here.


Back
Top