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Thread: Yellow laser or parts to build one

  1. #11
    Join Date
    Jan 2013
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    Bothell, Washington
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    2nd one. ******SOLD******************

    577-5W

    Manufactured 10/03/2007

    My notes on this one are.

    Threshold is @ 12.8amps

    @ 17.5 amps output is 360mw (stable at 360mw for the 10min I ran it)

    After 17.5 amps power drops to around 180mw and hangs there until,

    @ 35amps power jumps up to 500mw.

    I do not have a date sheet on this one.

    No attempt was made to tweek BRF and LBO temps. Test was at 40c and 40c.

    35amps is approximate absolute maximum current.

    asking $600 for this one. Collimator / Lens shown in pictures is not included.
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    Last edited by kclements; 09-07-2020 at 08:13.

  2. #12
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    Jan 2013
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    Bothell, Washington
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    Next one, ******SOLD*******************

    577-3W

    Manufactured 10/12/2007

    This was actually the 2nd OPSL head I ever owned. I got it a few years ago.

    It did not power up. No output.

    I cracked it open to see the guts, but never touched anything in it.

    I put the cover back on it after I was done.

    No data sheet on this one either.

    Asking $400
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    Last edited by kclements; 09-07-2020 at 08:13.

  3. #13
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    Jan 2013
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    Bothell, Washington
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    4th one,

    Genesis MX577-3W

    Manufactured 07/24/2014

    Included is the factory data sheet.

    Notes are,

    @22.2amps output is 1.64 Watts

    @32.5 amps output is 3.05 watts.

    Spec should be 3W @ 22.2amps

    Absolute max current is 36amps.

    So it is making its spec power but it is getting close to the max current rating.

    This usually means it has high hours on the head.

    Still good though for a few thousand more hours I would think.

    Asking $2500
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  4. #14
    Join Date
    Jan 2013
    Location
    Bothell, Washington
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    5th one, **********SOLD**************

    MX-577-3W

    Manufactured 11/20/2012

    This one comes with the factory datasheet

    Notes are,

    Output not stable.

    @22.9amps output is 220mw

    @27.5 amps power jumps to 1w (power stable for 5min test)

    @36 amps power is 1.5w

    So at absolute maximum current it is doing 1/2 its rated power.

    I would assume it has high hours on it.

    Asking $1500
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    Last edited by kclements; 09-07-2020 at 12:01.

  5. #15
    Join Date
    Jan 2013
    Location
    Bothell, Washington
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    6th and last one.

    Genesis MX577-3w

    Manufactured 09/10/2014

    Comes with Factory data sheet.

    This one seems perfect.

    3.2w at 22.1amps

    4.05w at 24.amps.

    No reason to go any higher on the tests.

    Data sheet shows it should be doing

    3w at 22.1 amps

    It is doing over that.

    Asking $4000
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  6. #16
    Join Date
    Sep 2020
    Posts
    25

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    I saw a green one of these emitting light with just DC voltage to the diode, can the unit do that without any other controls? I am interested in the last one which produces full output, but cannot throw down that kind of money on it right now. I could, in not too much time from now, maybe we could discuss working something out. Do you have any photo's you can send showing what is inside one of these?

    Chris
    Last edited by LaserHobbyist; 09-06-2020 at 20:21.

  7. #17
    Join Date
    Jan 2013
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    Bothell, Washington
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    You can use a Constant Current power supply with a compliance voltage of about 1.8v and get the head to output.

    However,

    They are not designed to be ran this way for any time and the output will not be stable for to long.

    The head will also overheat pretty fast.

    They really need a Diode driver designed for the Taipan/Genesis heads that has 3 Bipolar TEC drivers to control the Base Temp, LBO temp and BRF temp.

    I can supply the driver for an additional $1500. They come with the 12p Fischer connector/cable, 2 TEC's for the Base, a USB to serial converter for the GUI that can monitor/control and program it
    to run any of the Taipan/Genesis heads.

    You would still need,
    24v DC power supply @ 10amps or better.
    A heatsink for the head.
    and a small 24v DC fan to cool the driver.


    Attached are some pics of the insides.

    The failures I have seen are the glue failing on the TEC's for the LBO, BRF and in one case one of the optics.

    I have heard from a good source that the 40w Diode Bar can be replaced if they are dead or weak. But he was only able to obtain 8w from dead 10w 532 head when he was finished.

    I personally have never tried to replace the Diode Bar in any of them. Although at some point in the future I will try when I get time.

    From the manual the Diode is a Coherent 40w 810nm CCP


    Last picture is of the Driver.
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  8. #18
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    Bothell, Washington
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    Just for reference,

    Here is the inside of a Taipan 639nm 5W ($50,000 new!)

    These run heads side by side so they are twice as big as a normal Taipan/Genesis head.

    One of the sides was not outputting. Upon inspection of that head. The LBO and BRF TEC's had came unglued.

    Still working on this one.

    Once side is running good though.
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  9. #19
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    Sep 2020
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    Quote Originally Posted by kclements View Post
    Just for reference,

    Here is the inside of a Taipan 639nm 5W ($50,000 new!)

    These run heads side by side so they are twice as big as a normal Taipan/Genesis head.

    One of the sides was not outputting. Upon inspection of that head. The LBO and BRF TEC's had came unglued.

    Still working on this one.

    Once side is running good though.
    Those are not as difficult to work on as I thought they might be, I would be interested in a dead or lower power output one right away, but what wavelength is the bar diode? Of course I am familiar with normal SHG for green, but being yellow, I'm not at all sure for OPSL. They sure get a lot for these new, it's like a mountain of money.

    Silly question I had earlier about running without more than voltage to the diode, I thought there might be some kind of TEC control electronics inside, I guess.

    Chris
    Last edited by LaserHobbyist; 09-06-2020 at 21:07.

  10. #20
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    Bothell, Washington
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    They arent exactly easy to work on.

    I posted the pump diode specs a few messages up.

    But here they are again.

    It is a Coherent 40w 810nm. Not sure how many emitter. I can find out though.

    I was told that 810nm is not exactly crucial due to the OPS chip. It can be + or - 2nm .

    But I have not confirmed this.


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