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

  1. #11
    Join Date
    Jun 2012
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    Mainland China
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    38

    Default

    More inside photos.

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

    Type PLD-9-962
    SN A6SANXMN

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  2. #12
    Join Date
    Oct 2012
    Location
    Germany
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    1,050

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    ... 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

  3. #13
    Join Date
    Jun 2012
    Location
    Mainland China
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    38

    Default start up

    Quote Originally Posted by VDX View Post
    ... 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

  4. #14
    Join Date
    Jun 2013
    Posts
    3

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    I don't think you can run this laser without output isolator anyway.
    Like this
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    I would not have a hope to repair this laser yourself. Just my 2 cents.

  5. #15
    Join Date
    Jul 2013
    Posts
    8

    Default

    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....

  6. #16
    Join Date
    Jun 2013
    Posts
    3

    Default

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

  7. #17

    Default

    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
    Last edited by Skyko; 07-10-2013 at 11:55.

  8. #18
    Join Date
    Jul 2013
    Posts
    8

    Default

    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

  9. #19
    Join Date
    Sep 2012
    Posts
    64

    Default

    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?

  10. #20
    Join Date
    Oct 2012
    Location
    Germany
    Posts
    1,050

    Default

    ... 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

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