6W Triple diode laser

[richard86]

Re: A little build I've started.

Does it not change wavelenth when combining beams?
Like give out a diffrent colour?


Yeah good luck with this build mate

 

[ARG]

Re: A little build I've started.

Does it not change wavelenth when combining beams?
Like give out a diffrent colour?


Yeah good luck with this build mate

The wavelength does not change. The colour will end up looking a little purplish when both the 445nm and 638nm are on.

Just like when combining red and green lasers it will end up looking yellow, but the wavelength is still 650nm and 532nm even though it appears ~590nm

 

[richard86]

Re: A little build I've started.

Oh right. Cheers bud

 

[ARG]

Re: A little build I've started.

Going to add updates to OP so it's easy to follow.

Ready for pressing! Using a 9mm diode press that I made on the lathe and a 5.6mm from WannaBurn that I bought when I started the hobby.

Applying a very thin layer of thermal paste to the insides of the modules where the diodes will go to fill up the microscopic cracks between the metal.

Pressed & soldered. 26AWG on the mits and 24AWG on the 9mm's for better current carrying capabilities I also mounted the lens' in their respective barrels.


Also, a friendly reminder to those building a laser: Make sure your lens barrel threads into your module perfectly before pressing in the diode. I nearly pressed the Mitsubishi diode into a bad barrel. Could've easily ended with me buying another 75$ diode out of my pocket if I wasn't careful :gun:

 

[TheDukeAnumber1]

Re: A little build I've started.

Applying a very thin layer of thermal paste to the insides of the modules where the diodes will go to fill up the microscopic cracks between the metal.

Very nice, that should be standard on all diodes. How about putting a little arctic alumina on the backs of the diodes?

Like so.

 

[ARG]

Re: Build: Tri-Diode laser

Thanks I have my reasons for not adding compound to the backs, but I wont get into in this thread or the topic of discussion will never go anywhere expect about thermal properties.

I would take some power measurements of the diodes, but my LaserBee is WAY off calibration, and I'm waiting to get my Ophir back from MarioMaster. I thought my Ophir was off, but he tells me it's matching his +/- 1% Coherent Fieldmax so I can safely assume my LaserBee is reading around 10% low. I wish I had known this before so I could've gotten my dual diode laser properly metered, it could've been 5W for all I know.

I can still work out the PIV curve with the un-calibrated LaserBee, so I'll do that tomorrow and select the currents to run the diodes at.

 

[sinner]

Re: Build: Tri-Diode laser

Congratulations ARG on starting up the building process, Hope everything goes as planned and smoothly.. Can't wait!!

 

[lasersbee]

Re: Build: Tri-Diode laser

Thanks I have my reasons for not adding compound to the backs, but I wont get into in this thread or the topic of discussion will never go anywhere expect about thermal properties.

I would take some power measurements of the diodes, but my LaserBee is WAY off calibration, and I'm waiting to get my Ophir back from MarioMaster. I thought my Ophir was off, but he tells me it's matching his +/- 1% Coherent Fieldmax so I can safely assume my LaserBee is reading around 10% low. I wish I had known this before so I could've gotten my dual diode laser properly metered, it could've been 5W for all I know.

I can still work out the PIV curve with the un-calibrated LaserBee, so I'll do that tomorrow and select the currents to run the diodes at.

Why don't you send back your LaserBee to have it re-calibrated..
It may still be under warranty. Send me your LaserBee's S/N by
PM and we'll look it up.
We do live in the same country so shipping would be not need
to go across international borders.

BTW if you know your LaserBee is 10% low you can still use it
in the interim since you have a baseline. Even if uncalibrated the
output is still linear..


Jerry

You can contact us at any time on our Website: J.BAUER Electronics

 

[ARG]

Re: Build: Tri-Diode laser

@Sinner thanks! I'll be getting more done today hopefully

Will do Jerry! I sent you a PM.

I didn't contact you about it earlier because I wanted to get the Ophir back and get all the data before I know for sure that it's off the rated +/-5% calibration.

 

[lasersbee]

Re: Build: Tri-Diode laser

I got your PM and replied... I'll need some additional info.

I understand it now seems to be only 6% off instead of the
~10% you stated above. That seems a bit better....:yh:


Jerry

You can contact us at any time on our Website: J.BAUER Electronics

 

[ARG]

Re: Build: Tri-Diode laser

I got your PM and replied... I'll need some additional info.

I understand it now seems to be only 6% off instead of the
~10% you stated above. That seems a bit better....:yh:

Yeah, I was speaking in hyperbole then. The laser for the testing wasn't at thermal equilibrium yet either, so it may be more or less. For now it looks like at the lower powers it's around 10% off, but for the readings over 1.5W it's around 6% off.
Once I have the Ophir I can run the laser for a few hours to reach thermal equilibrium and take accurate readings and post the results in a different thread.

 

[Trevor]

Re: Build: Tri-Diode laser

Yeah, I was speaking in hyperbole then. The laser for the testing wasn't at thermal equilibrium yet either, so it may be more or less. For now it looks like at the lower powers it's around 10% off, but for the readings over 1.5W it's around 6% off.

That's a whole lot worse than 10% across the board...

I hope you get it taken care of...

Good luck...

Trevor

 

[kaunak]

Re: Build: Tri-Diode laser

Hmm seems I was confused at first about the diodes used in this build. I thought it was going to be 3x 9mm for the awesome power they can output but you went with a 500mw mits instead. Any reason you chose the 638 over say a 5.6mm m140? The final wavelength will be cool to see and this is one of the coolest builds ive seen so far. Cant wait to see it finished

 

[ARG]

Re: Build: Tri-Diode laser

Hmm seems I was confused at first about the diodes used in this build. I thought it was going to be 3x 9mm for the awesome power they can output but you went with a 500mw mits instead. Any reason you chose the 638 over say a 5.6mm m140? The final wavelength will be cool to see and this is one of the coolest builds ive seen so far. Cant wait to see it finished

Thanks!

The process for combing three 9mm diodes would result in a larger beam, and there may be some splitting in the beam.

Using the mits diode allows for perfect overlap and higher power density, making for a brighter, smaller beam.

 

[Mrcrouse]

Re: Build: Tri-Diode laser

I hope the host gets to you soon, I am excited to see this!

 

[ARG]

Re: Build: Tri-Diode laser

I hope the host gets to you soon, I am excited to see this!

Knowing Canada Post it's probably going to take a couple more weeks. :crackup:

I hope to have it done soon after I get the host, I'm dying to build this