Blue Laser Dual Diode 9mm.

This is my project for laser pointer used dual diode 9mm, 26650 host.

Using two diodes 9mm with copper heatsink and glass lens for 445nm.


Testing + heatsink about 500mW/diode.






The cube.


Driver module with heatsink


Button with Eagle Eye Led Green.




Finish.


Eagle switch.


Front face with glass anti dust.




Beam shoot.


Using 2 26650 Li-Fe battery.




Some beam shoot picture.








Clip.
:thanks:

Wow very nice! What's the power? That's looks like a very efficient way to double diode. Looks very clean! Would love to have one like this

dope. +rep

Nice! But why only 500mW per diode...? Each of those could easily run at 3 watts...

Nice job man! Always love seeing dual diode builds.


Should press those diodes in a bit more, they are supposed to be recessed in the module

crazyspaz said:

Nice! But why only 500mW per diode...? Each of those could easily run at 3 watts...

Click to expand...

At 500mW only when testing, finish run 3 watts per diode.

ARG said:

Nice job man! Always love seeing dual diode builds.

Should press those diodes in a bit more, they are supposed to be recessed in the module

Click to expand...

Thanks ARG :beer:

SKeeZ said:

dope. +rep

Click to expand...

Instantly reminded me of Kid n Play :crackup:


Great build...very tidy.

+3

Some job, tomsk! In the end your video proves the dual diode laser you've built is in great shape and represents the 445nm wavelength with a glory.

:gj:

Nice work :beer:

+1 :gj:

Great build. The host looks very familiar.
There is even room for a third diode.

The big question is, how much kiss it going to take to get one built?!

Very nice build !! Yea !! " Combiners Conquer " !!!!! I assume you have one LD beam ( Primary) straight out and one LD (Secondary) at a 90 degree....entering the PBS cube.

How are you adjusting/aiming the Secondary beam so it aligns with the Primary beam ???. Adjustment is the key here !!! As you well know !! Finally...more pics of the head LD/Cube arrangment will be interesting !!! Thanx for the post.

CDBEAM=======>

I was wondering the same thing. How is the second diode arrange to hit at 9 0degrees . In the picture they are parallel right? Or am I missing something? My mother's maiden name is Nguyen!

tomsk said:

At 500mW only when testing, finish run 3 watts per diode.

Click to expand...

nice hope you can test it on a power meter when its finished!

In the " Cube " pic...you can see the LD on the right clearly enough...looks to be orientated going straight into the PBS Cube.
I think...the circle on the left... is a mirror reflection of the front of the Secondary LD....and that beam is going into the PBS...at a 90 degree angle...entering the the PBS on the left side. SO...the mirror used to bounce the left beam at 90 degree... is also used to steer the Secondary beam.

I must note that the " Steering " or abillity to adjust beam alignment is a key element in " Combiner Hand Helds ". With one beam...a 10th of a degree of the beam direction being off the radial axis of the body of the unit....will not likely be noticed....BUT...
When combining two....or more beams....that is when " AS close to perfect" machining becomes completely necessary. Therein lies the challenge....the fun...and the reward !!!!!!!

One note...the LD beams must BOTH start very,very,very close to the same origin elevation. The bounce mirror cannot adjust for a mis-alignment of the LD elevations...just pitch and yaw. Also....the diodes must be rotated within their individual mounts at 90 degree to each other to deliver the correct polarization into the cube.

A work-around to this is to position a waveplate in one of the LD beam path's. This plate looks just like a thin disk...and it itself must be rotated in the correct orientation to change the polarization to be 90 degree off the other beam one is trying to combine in the PBS.
SOooo... both options allow the PBS cube to effectively combine beams. The difference between rotating the LD's vs. using a waveplate....with the 445 Multi-element diode... will be seen in the farfield geometry.

If other corrective optics are not used to shape the 445 typical bar output into a more rectangular output....this is what you will get;

1) With just rotating the LD's to be 90 degree to each other, the PBS will work...and deliver a cross output " + "....as the " bars " cross each other to form a plus " + "
geometry.

2) With using a waveplate... both LD's must be rotated so that the slow axis is in the same position...( BOTH outputs have the bar shape going the same way...SOoo
one sees this - - and not this - l ) The waveplate rotates the polarization of the one beam....and does not effect the geometry....so....the farfield geometry using a wave plate delivers just this -- one beam is superimposed over the other beam.....so....no cross....just a bar.

I prefer the cross " + " ....as this is closer to a dot/circle....and....the wave plate cuts the power output of one beam down about 5%...So...there you have it...a nuts and bolts on beam combining with a PBS....which...by the way stands for
" Polarized Beam Splitter " ....but we are using the PBS as a combiner vs. a splitter.

CDBEAM=======>