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Old 04-10-2016, 04:52 AM #1
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Default Combining 2 NUBM44 for portable 14W

Alright, I do not mean to be spoon fed info. Ive been looking hard but I cant find the info I need. I am curious of what I would need for this project. I know I need a PBS cube but I am not exactly sure of what kind I would need. Also it here any other optics needed besides the PBS. I am also curious if there is practical way to focus the combined beams like you would normally with 3 element lens or g2 lens?


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Old 04-10-2016, 04:56 AM #2
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Default Re: Combining 2 NUBM44 for portable 14W

contact either Jander or CDbeam as they're specialise in that area.
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Old 04-10-2016, 07:17 AM #3
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Default Re: Combining 2 NUBM44 for portable 14W

The lasers have to be heat sinked, you would need G2 lens and a cylindrical pair for each to correct the divergence of the fast axis then a bounce mirror, a wave plate and a combine cube or pass/reflect glass at a 45 angle, maybe finish off with a nice beam expander.

Use the search bar, you can find the info.
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Old 04-10-2016, 08:58 AM #4
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Default Re: Combining 2 NUBM44 for portable 14W

Oh, Hi Red, you were as always faster in reply than me!

Hi midnightchime,

If you do not want to be spoon fed, just look at my non portable device in last reply to Redīs thread in Optics section - there you will see how it all has to be assembled.

About portable: I have been trying to assemble such a thing (for 2 NUBM07, but this could also work with 44īs) since year start, but every heatsink I orderd from ebay and aliexpress turned out to be not what was advertised on pictures or simply not passing to 12mm copper modules.
So finally, I decided to make heatsinks from 12 mm shaft holders (you see one on the picture).

Here is the assembled but not yet tested optomechanics part with 3 cyl. lenses acc. to finding of Milos in his Optics thread. The bag contains prism mirror. PBS cube and waveplate are not on the picture, because I do not want to scratch them before glueing on. I also want to test these 3 step-down circuits from dx to drive 2 NUBM07 in series at 3.5A. For 44īs you will need SXD drivers instead.



To make a thing like this the parts except of Al shafts from hardware shops will be:

2x 12mm copper modules from DTR (short Al rods are their placeholders on the picture) with SXD drivers and G-2 lenses.
4x 12mm shaft holders from aliexpress cut to obtain heatsinks with optical axis hight of 15mm and well filed to ensure heat transfer to the baseplate.
2x PBS/mirror holders from Lasertack. They are designed for optical axis at 15mm hight.
1x dielectric coated Prism mirror from Lasertack (or flat mirror from elswhere).
1x 445nm waverotator (this is how they call waveplate in Poland) from Optlasers with brass mount. This set is not in their ebay shop, but I asked by mail and they sent it together for the price of 638nm set.
2x sets of 3x Cylindrical lenses also from Optlasers. They are for 638nm, but work well with blue because of broadband AR coating. Unfortunately they do not sell separate concave lenses, so I have to sacrifice 2 sets. The reason for such orientation of 3 lenses is to build a variable 1D beam expander - you can find explanation in Milos thread, Optics section. These lenses have 12mm square shape and you can see pass well into the 12mm Al U-shaft.
1x 400-450nm PBS (I checked several from lasertack, stanwax, aliexpress and techhood-the cheapest one - they all work well).

Last thing - do not expect 14W exactly. With the tested non portable device I only got 12-13W for combined beam while only one laser on at a time of mesuring and my LPM sensor has burned pitches after this because it was at its limit.
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Old 04-10-2016, 11:12 PM #5
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Default Re: Combining 2 NUBM44 for portable 14W

thank you for your input. This is not going to be as simple as I thought. Im not sure if I should go forward with doing it only to stall in the middle of the project or do a poor job due to lack of tools. Or perhaps I am just being intimidated by concepts that I d not fully understand. You see I have been building lasers for 4 years now but never moved on from just your basic single diode. I thought it would be a fun project to combine 2 beams. I have only ever made lasers that are held together with electric tape and hot glue lol
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Old 04-26-2016, 02:04 AM #6
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Default Re: Combining 2 NUBM44 for portable 14W

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Originally Posted by midnightchime View Post
thank you for your input. This is not going to be as simple as I thought. Im not sure if I should go forward with doing it only to stall in the middle of the project or do a poor job due to lack of tools. Or perhaps I am just being intimidated by concepts that I d not fully understand. You see I have been building lasers for 4 years now but never moved on from just your basic single diode. I thought it would be a fun project to combine 2 beams. I have only ever made lasers that are held together with electric tape and hot glue lol
NO....It is not simple !! Optics are a demanding Master !! But worth it !!! Perhaps I will undertake another build....which shall combine two (2) HP blue diodes. I have several builds to finish still !!! Beam out !!
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Old 05-07-2016, 08:59 AM #7
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Default Re: Combining 2 NUBM44 for portable 14W

Hi CDBEAM,

On you beautuful builds in different colours there was a pair of big square cylindrical lenses (6x if I am correct).
Do you know a source of those where price woulds be resonable?
What size are they?

Thank you.
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Old 05-07-2016, 01:23 PM #8
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Default Re: Combining 2 NUBM44 for portable 14W

Quote:
Originally Posted by Light superglue View Post
Hi CDBEAM,

On you beautuful builds in different colours there was a pair of big square cylindrical lenses (6x if I am correct).
Do you know a source of those where price woulds be resonable?
What size are they?

Thank you.
6X at 18mm wide by 23mm tall. PM me
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Solar Prominence-Laser Lumia combined with audio http://laserpointerforums.com/f47/laser-lumia-terrawatt-labs-97261.html
CYAN CANNON V BUILD-Green + Blue = Photon Cannon - Build resumed http://laserpointerforums.com/f49/cy...ild-94999.html
Titanium Cyprus TRI EDC with 520 nm and GITD Europium barrel rings-Completed http://laserpointerforums.com/f45/my...t-94978-2.html
TRIDENTIS BUILD-Three (3) 445 Combiner-Knife edge-Completed http://laserpointerforums.com/f65/tr...uty-83781.html
DRAGON'S HEAD BUILD-Optically corrected P73-Completed http://laserpointerforums.com/f50/no...ign-87235.html
Purple pHAZE Combiner - Red + Blue = Purple-Completed http://laserpointerforums.com/f42/pu...ple-93717.html
Sky Blue Ramjet-Corrected NUBMO7E- Completed http://laserpointerforums.com/f42/sk...ild-94646.html
Check out http://www.hobbylasers.com/
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