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Old 02-04-2011, 04:07 AM #1
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Cool 5W c-mount maglite

Frequency doubled, fiber coupled, adjustably collimated 5W C-mount in a large maglite host...anyone have any input? Possible?


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Old 02-04-2011, 04:10 AM #2
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Default Re: 5W c-mount maglite

Not a good first project.

And I doubt it.

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Old 02-04-2011, 04:50 AM #3
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Default Re: 5W c-mount maglite

Trevor is right, You could power the diode, but unless you're a non-linear optics kind of a guy, It will take you a long time to get your 1W of green out of a doubler in TEM00, and then collimated into a beam just by tinkering.

Not to mention the thermal issues you would run into.

No doubt others have dreamt of something like this, but with all the tinkering laser gurus here, no one has yet been able to make something like a 1W green handheld. Only one manufacturer I know of does it, but not cheaply.

Props for dreaming big though!
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Old 02-04-2011, 05:03 AM #4
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Default Re: 5W c-mount maglite

Quote:
Originally Posted by maranello551 View Post
Frequency doubled, fiber coupled, adjustably collimated 5W C-mount in a large maglite host...anyone have any input? Possible?
So you want to frequency double a diode?
What wavelength?
And what is the fiber for? The doubled output or to correct the diode's beam or...?

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Old 02-04-2011, 05:19 AM #5
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Default Re: 5W c-mount maglite

i don't care too much about the doubling as long as i have burning power. if i keep it IR how difficult would this be?
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Old 02-04-2011, 05:57 AM #6
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Default Re: 5W c-mount maglite

difficult, but more feasable. Correction optics aren't impossible to use.

You will need a 5W C mount diode at whatever wavelength you prefer. Just make sure it has a built on FAC.

From there, you will need a cylinder lens to correct the rectangular beam into a square. If you use the right lens, you can then go straight to a beam expander so you can focus the thing to where you want.

Co2 has been done before also. See: StarWarz CO2 Power

Fiber coupled diodes would only be effective at centimeters of distance, and if they didn't take tens of amps to be driven.
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Old 02-04-2011, 12:58 PM #7
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Default Re: 5W c-mount maglite

^FAC = Fast Axiz Correction
For a first project it is the way WRONG thing to build IMO. Just get yourself a dvd burner and burn some things, after some experience get yourself goggles for IR AND THEN the laser (after the goggles for godssake). If you are experimenting with frequency doubling for green get goggles for 532nm 808nm and 1064nm (for godssake).
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Old 02-04-2011, 02:16 PM #8
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Default Re: 5W c-mount maglite

Close, the C is for correction. It changed the divergence to something closer to the slow axis, and that value is still WAY too large to be considered collimated.
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Old 02-04-2011, 02:58 PM #9
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Default Re: 5W c-mount maglite

@Cyparagon
I edited the message, changing from correction, thinking it was collimator lol
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Old 02-21-2011, 08:04 PM #10
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Default Re: 5W c-mount maglite

Can I ask a related question -

What was your intended approach for heatsink design?

I am the proud owner of a 635nm 300mW C-Mount diode. This build is going to be absolutely over my head, and I'm absolutely thrilled about that
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Old 02-21-2011, 08:21 PM #11
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Default Re: 5W c-mount maglite

@rhd
OP: Last Activity: 02-04-2011 03:19 AM
IIRC, Kenom makes heatsinks/modules for C-mounts.. you should contact him.
Where did you get 635 C-mount?
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Old 02-21-2011, 08:35 PM #12
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Default Re: 5W c-mount maglite

PM'd

I took a gamble on this:
PLT Technology Inc. 635nm, 300mW laser diode on C-mount - eBay (item 170603571114 end time Feb-21-11 12:02:22 PST)

I'm sure it's not going to be an easy diode to make use of...or focus...and it wasn't cheap... so please don't burst my bubble for at least a day or so, k? lol
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Old 02-21-2011, 08:36 PM #13
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Default Re: 5W c-mount maglite

I'd buy if I have the money so.. CHEAP!
you pm'ed me?
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Old 02-21-2011, 08:43 PM #14
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Default Re: 5W c-mount maglite

Lol, sorry, no - PM'd Kenom

It seemed cheap, relative to anything else I had seen of that power in that wavelength. The PIV curve is really impressive too. They took it up to 1100mA, and got 360mW out of the diodes in testing.

Of course, it's "as-is", so it might not work. Yikes!
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Old 02-21-2011, 09:01 PM #15
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Default Re: 5W c-mount maglite

Quote:
Originally Posted by rhd View Post
Can I ask a related question -

What was your intended approach for heatsink design?

I am the proud owner of a 635nm 300mW C-Mount diode. This build is going to be absolutely over my head, and I'm absolutely thrilled about that
You will want to bolt it down to a heat-sink, power it up, and test it before you get it mounted.
Aixiz lenses won't help you with this diode, so you will have to find some optics that work before anything else.

Does this diode have FAC? If so, it will be a little easier to get a decent beam.
My recommendation would be to use 2 elements. A very short FL lens positioned very close to the emitter to tame the raw beam, then a longer FL lens (with a large diameter) to capture as much light as possible. The fatter the beam, the lower your divergence will be. You'll still get a rectangular beam without correction, though.

After that, you will need to design the heat-sink around the optics.
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Old 02-21-2011, 09:35 PM #16
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Default Re: 5W c-mount maglite

One of the challenges is that I have almost zero data on this diode.

Would a FAC be of sufficient size to be visible in the product shot? Or are they tiny? All I have at the moment is the product photo - don't have the diode yet.

In either case, where would be a good place to start hunting for optics?

Cheers
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