How can I fix (do it yourself) this IPG fiber laser?

[GregR]

More inside photos.

Diode labels are:
Type PLD-5-962
SN G6TJBNHY

Type PLD-9-962
SN A6SANXMN

IMG_0897.JPG
IMG_0898.JPG
IMG_0899.JPG
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IMG_0901.JPG
IMG_0903.JPG
IMG_0904.JPG
IMG_0906.JPG
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photo 1.JPG
photo 2.JPG
photo 3.JPG

[VDX]

... complete different from CW-fiberlasers ...

The PLD-5 is a 5Watts @5Amps diode, the PLD-9 accordingly has 9Watts @9 Amps.

In the CW-types I'll have nearly 30 of this laserdiodes!

The russian marked device should be an AOM (Acousto-Optical-Modulator) for switching ON/OFF the resonancy to generate pulses with higher energies.

Viktor

[GregR]

... complete different from CW-fiberlasers ...

The PLD-5 is a 5Watts @5Amps diode, the PLD-9 accordingly has 9Watts @9 Amps.

In the CW-types I'll have nearly 30 of this laserdiodes!

The russian marked device should be an AOM (Acousto-Optical-Modulator) for switching ON/OFF the resonancy to generate pulses with higher energies.

Viktor

Hi Viktor,

Assuming that the control system will prevent a turn on, then what comments/suggestions/recommendations for the following approach.
Directly power on the diodes from a power source.
Directly power on the AOM from a power source.
Test laser output.
If the power is tiny, then assume that the previous steps worked (how else to check if the diode is on, does it get hot?)

Then, if there is no output coupler, or reflection grading because the fiber is cut short, then do the following:
Attempt to polish the fiber end (because it was cut with a pair of plyers)
Get an expansion setup to expand the beam and collimate
Add a regular YAG laser output coupler
Test the laser output.

Thanks,
Greg R

[Power]

I don't think you can run this laser without output isolator anyway.
Like this
$T2eC16d,!)0E9s37HlwFBRUKOO6Yl!~~60_57.JPG
I would not have a hope to repair this laser yourself. Just my 2 cents.

[mctawards]

Hi,

I experience with the same set up what you bought thru ebay...

1. The other end of the fiber has a collimator and I purchased along with that, but both separated.

2. When i tried to weld the fiber, with help of an experienced guy nearby we didnt suceed.

3. I searched the ozoptics dot com and saw some pigtail components to see to match this...

4. I bought a component from ebay

http://www.ebay.com/itm/110959240841...84.m1423.l2649

Hope to fit with my fiber end and assemble the collimator setup, which came along with this

Regards
Saravanakumar
Hope this helps to find a lead....

[Power]

The fiber should be fused spliced, period. What was the problem with the splicing?

[Skyko]

I bought a similar unit but do not have it yet. There is a master oscillator which is injected into the doped fiber and this is boosted by a power amplifier system that I guess are those diodes you took a picture of. I am not really thinking that the output coupler would be in the end of the fiber that is cut but would rather be inside somewhere near the coiled doped fiber (very fragile I read somewhere?).

My unit only has peak power of 6.25kW...your's is 12kW

Here is some info that *might* be the same for your unit. There are things that have to be set on the 25 pin connector, like turning on the MO and the Booster, disabling the emergency stop, setting the power via 8 bits and a latch pin, etc.

http://www.nutfieldtech.net/nutfield...riestypeB9.pdf

I will know more when I get mine and start playing around, while wearing a pair of OD10 goggles of course!

edit: Interesting find. I noticed in a document for another version of a IPG laser they describe the serial interface and command structure....could be usefull!
http://sparkycnc.com/pdfs/YLP-HP.pdf

[mctawards]

The fiber is sliced and fused using some special equipments, but the fusing is not able to complete because of its very thin nature and proper tools, unavailabiilty

regards
Saravanakumar

[als1980]

The first set of pictures showing the diodes from the inside of an IPG unit is mine! Lol. Just got done removing the diodes from the heat sink. Now what to do with 26 5w diodes... anyone have doped fiber laying around?

[VDX]

... i'm using them for laser-engraving and powder-sintering ;-)

You can combine several of them to a single spot for higher power.

Some years ago I was busy developing the adjusting workplace for a ringfocus-laser, where 80 pcs. of 20Watt-diodes were combined to an averaged spot with 1.6kW power!

With fibercoupled diodes this is much simpler than with the direct types with FAC's we used then - simply point a group of fiber ends through a single bigger lens, or attach GRIN-rod-lenses to the fibers and adjust them on a spot ...

Viktor