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FrozenGate by Avery

Dual LOC project w/PBS cube

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LuxIgnis

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In this thread I'd like to describe my efforts to try and combine 2 red LOC lasers, for a 500+ mw of pure red.

So far I have the aixiz modules and the diodes ready.

Today I designed a jig for mounting everything, trying to keep it as simple as possible.

I have also cut the pice I needed in aluminum with a hobby cnc machine.

This is what I came up with.

The cube is 5x5mm and will be glued on the half square point that you can see which also has 5mm sides, so it's impossible to misalign things.

The modules we know are 12mm diameter and will sink below the surface about 3.2mm. Also those once secured, are impossible to move, they are pretty stuck between the two sides and touching the bottom perfectly.

They will be secured with tie wraps, so they can be rotated easily.

Also I left room for focusing, since both lasers will have to be focused the same.

I am hoping the beams will not overshoot the cube, and I believe it won't, but if that's the case I will raise the cube a couple millimiters.

Here is a photo of the device.
 

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You'll likely want to mount the cube on an adjustable platform of some sort, since tweaking is always necessary when aligning PBS cubes. Even if your measurements and angles are perfect, there will still be enough variation in the diodes to cause you to need adjustments. Also, for a PBS cube to work properly, the diodes axes of emission (polarization) must be 90 deg. from one another.
 
Are you sure you want to make it a labby? You could be the very first one to make this into a pointer :D


Keep us updated, this is going to be awesome :)
 
...never thought of making it portable....

with the aixiz modules at 90° it would be one FAT pointer shooting from the side....

To make it portable it would be better to use a bigger cube and place the bare diodes at a few mm to the cube.


It's a good idea for a future project.

Actually, now that I think of it, I could just cut it up and use the front portion of the aixiz modules.

Definitely feasable..., if this works, I might just try that.
 
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When you actually do this it would be a good idea to glue the focus of the diodes to infinity because a small shift of the lens could mess up your alignment.
 
I am putting together the components,
and I have designed a driver TTL for the two lasers,
don't pay attention to the weird layout I am still a beginner with electronics....
 

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That's looking very sweet!

Very professional :)

Looking forward to seeing your final results, keep up the good work and keep us posted :d
 
very strange way of mounting the aixiz housings, why would you want to cut the beam coming out in half?
 
actually the modules sink in just 3mm , flush with the metal ring, the beam will not be cut at all, I will also file a bit right in the middle with a round file. The measurements have all been taken into account, the picture probably doesn't show it, but will take another picture from the front of the modules to show how it's flush with the metal housing.
 
I filed a bit right in the center but I don't think it was necessary, since the beam will be getting thinner as it comes out, and the lense area is totally clearing the module's beds.
 

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My advice is to be careful getting too tight with your tolerances around the lens assemblies. The lenses typically have a bit of play to them and if you get them blocked close on a side you might not be able to adjust them enough to get a clean beam.. especially since it seems your cube will be rigidly mounted. Merely adding my thoughts, though.. I'm interested to see some efficiency numbers and a beam profile in the far-field from the finished product.
 
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im not sure thats the best setup to be honest.

with the beams so tight tothe surface will you be able to adjust the cube to get proper alignment?
 
good advice,
I will try with this setup and If I cannot alight the beam in a satisfactory way,
I will redraw the mount and make the front part of the beds longer all the way up to the cube's position, and also will make it deeper in the front part where the lens assembly is, so it can rotate easily. Right now, when I keep the modules tight, the focus adjustment turns, but not freely, it rubs the bottom of the beds.
 
PBS cubes are those small cubes in phr sleds? Sorry if this is a noob question but I really need to know.. Thanks!
 
Remember to isolate the two modules electrically.

Both will be case negative, so if they touch, both of the diodes will be fired.

...I think.
I read it somewhere on here.

Can somebody smarter than me confirm this?
 
Both cases will be ground,

but the positive leads will be independent.

So it should work just fine.

The Red diodes may not equally share current,
but you can remedy that with small series resistors (.33 ohm).

For alignment, you will probably need some adjustment ability on the laser reflected by the PBS cube.

LarryDFW
 
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