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Old 01-08-2017, 05:23 AM #145
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Default Re: Portable FAP Red

Mike, I was worried why you were gone so long! Tried emailing you but the email failed at the address I had. I just added you so you can PM me. Did you get your FAP project finished?


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Old 01-09-2017, 01:26 AM #146
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Default Re: Portable FAP Red

Chris -- I'll try another PM. I wouldn't
work last night.
Mike
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Old 01-09-2017, 07:57 AM #147
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Default Re: Portable FAP Red

Worked! OK, I didn't know you weren't able to PM me earlier. Please post photo's of your new lens arrangement when ready
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Old 01-13-2017, 01:31 AM #148
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Default Re: Portable FAP Red

Chris -- This is my condenser assembly ----



I have a simple SMA fiber input fitting and one to hold your PCX housing. I am being careful NOT to burn another
expensive component. The fiber cable should protect the FAP if something goes wrong. I will be cleaning all optics
before I bring up the 808 power!

Those are coated lenses from THOR Labs. 26 mm OD and 16 mm fl Aspheric PCX.
HM
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Old 01-13-2017, 04:15 AM #149
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Default Re: Portable FAP Red

Nice, AR coated

The focus will be adjustable?
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Old 01-14-2017, 01:43 AM #150
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Default Re: Portable FAP Red

The assembly is adjustable. "If you can't make it perfect,
make it adjustable!"
HM
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Old 02-26-2017, 02:57 PM #151
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Default Re: Portable FAP Red

Hello Mike,
Not been able to log in here for years for too many reasons.

1. I looked into adding CC to your PTH08 supply via the tracking pin by adding simple add-on circuit. Difficult because TI Datasheets seems to hide the glue switching chip, incomplete schematic shows no inductor! There must be a simple way to adjust current via over current also. I'll let know latter on that. I really love the boards state of the art inductors. I'll post my solution on this latter.

I would use only 16 gauge wire to FAP as over current insurance and add
super low res. capacitor solders to FAP pins. PM me and I'll mail you a free diode protector.

2. Inside the FAP, what's the layout, bar or separate diodes?
Any photos posted here?
I'd like to interface my new 40W bar with fiber concentrator and found one on e-bay, do you think this is near same what you see inside the FAP.
I need homogenize my bar into a 3x3 crystal, I think this one perfect.
see attached link.

dave george
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Old 02-26-2017, 03:06 PM #152
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Default Re: Portable FAP Red

I can tell you what is inside his FAP as he got it from me, it is a bar.
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Old 02-26-2017, 03:43 PM #153
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Default Re: Portable FAP Red

Its a CCP diode ( Bar ) with 19 emitters coupled into 19 fibers .
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Old 02-26-2017, 04:39 PM #154
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Default Re: Portable FAP Red

Quote:
Originally Posted by Hemlock_Mike View Post
I'm getting started here on a new project. I hope to make this portable (handheld) !!!
A big thanks to Chris from way north for his help.



These are the main components. The FAP RED module, a SUPER buck driver from TI and a
battery pack to kick ass.... The Pot is for power control and the PB switch is the trigger.


This is the back side showing the fan cooled copper heat sink and the back of the driver.
The copper buss bars don't show well but are necessary for the 30+ Amps involved.

More later -----
HMike
Very nice project, impressive, going to be one heck of a hand held. Looking forward to the build pics and beam shots they should be spectacular!
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Old 02-27-2017, 03:24 PM #155
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Default Re: Portable FAP Red

The PTH08 series is proprietary so no complete schematic available.
Never expected Texas Inst. to poorly document it.

I like the design but adding a custom adjustable OP amp constant current would take the best skilled 1 or 2 days.

I just scored that Coherent 19 fiber to bar assembly on EB, has anyone worked with one? link posted earlier
It should be straight forward to make the 40W bar into a FAP.
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Old 02-27-2017, 03:27 PM #156
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Default Re: Portable FAP Red

I found a good document on that regulator and forwarded it to Mike, he probably still has it, but I don't. It isn't a schematic regarding the IC, but does give a pin-out and all the info you might need to make one work.

I have bought both bars and FAP units with a bar in them. As far as getting the fiber bundle to put on a bar, you can do that by buying one on ebay, but not cheap.

Edit:

http://www.ebay.com/itm/Fiber-array-...-/262235716987
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"I regard consciousness as fundamental. I regard matter as derivative from consciousness..." - Max Planck. "Everything we call real is made of things that cannot be regarded as real" - Neils Bohr. "What we call physical things and events do not exist independently of subjective experience..." - Deepak Chopra.

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Old 02-27-2017, 03:39 PM #157
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Default Re: Portable FAP Red

Quote:
Originally Posted by laserrod View Post
It should be straight forward to make the 40W bar into a FAP.
It isn't, you need to align 19 fibers and 19 emitters perfectly to minimize insertion loss on each one, then make sure they are all secure and won't drift when you're done.

Quote:
Originally Posted by Alaskan View Post

I have bought both bars and FAP units with a bar in them. As far as getting the fiber bundle to put on a bar, you can do that by buying one on ebay, but not cheap.

Edit:

Fiber array for high power laser diodes - Coherent FAP | eBay
That price isn't too bad, the fun part is coming up with a jig or some way to get them all aligned, and not damage them in the process either.
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Old 02-27-2017, 04:06 PM #158
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Default Re: Portable FAP Red

Initially, he sold one to me for 15 bucks, but I didn't use it yet. The next time I tried to buy one he wanted 35 dollars.

Edit: I found a link to download the doc I found for Mike: http://www.ti.com/lit/ds/symlink/pth08t250w.pdf
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Sincerely investigate any of these three short quotes as new concepts and you've taken your first step into a larger world:

"I regard consciousness as fundamental. I regard matter as derivative from consciousness..." - Max Planck. "Everything we call real is made of things that cannot be regarded as real" - Neils Bohr. "What we call physical things and events do not exist independently of subjective experience..." - Deepak Chopra.

Each of these three rabbit holes go deep, ending up in the same place.

Useless troll fighting.
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Last edited by Alaskan; 02-27-2017 at 05:36 PM.
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