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Thread: ML501P73-2, a capless 638nm 5.6mm 500mW Red Laser Diode - Test results.

  1. #1
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    Default ML501P73-2, a capless 638nm 5.6mm 500mW Red Laser Diode - Test results.

    The hope is that the emitter on the P73 is identical to the G71, although this has not been proven yet it appears to be likely.

    If they are optically the same; then the same correction optics will work on both the G71 & P73.
    A GB is running for the relevant optics on here:
    http://www.photonlexicon.com/forums/...tion-optics-GB

    At present there is a lack of suppliers for the P73, prices have been reported to be around 110USD, if you find any sources then please share the info for everyone.


    Optics:
    First Lens :2mm ( Available from Dave on the forum) Dave can supply a mount for the lens.

    Second lens ( Available from kiyoukan on the forum - See the GB above )
    Third Lens ( Available from kiyoukan on the forum - See the GB above )

    Drivers
    Suitable drivers are available from a few vendors:
    Die4Drive
    DrLava
    Eddison

    Diode protection available from
    Not Needed.

    Datasheet
    http://www.mitsubishielectric.com/se...1p73_p1245.pdf

    Usage and Configuration
    Available from CDbeam

    Credits for the Development of the G71 solution goto
    CDbeam
    Solarfire
    logsquared
    kiyoukan
    Steve-o


    To be continued...
    Last edited by andyf97; 03-16-2012 at 15:21. Reason: Updates.

  2. #2
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    The price tag sounds about right from what I am hearing. I am being told they should be available next month but I am not getting my hopes up as it has been "they will be available next month" for about 8 months now.

    I could be wrong but I thought I heard the emitter was a tad bigger but anyway I can't wait to see some results on them as it sounds like they will have a much less wavelength shift and a considerable increase in output.

  3. #3
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    I cant wait till i can get my hands on some. i am dreaming of a 4W quad 635nm build.
    DTR i hope you dont mind but i linked your shop for the 635nm 300mw diodes.
    Hope you have good stock!

  4. #4
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    Quote Originally Posted by kiyoukan View Post
    I cant wait till i can get my hands on some. i am dreaming of a 4W quad 635nm build.
    DTR i hope you dont mind but i linked your shop for the 635nm 300mw diodes.
    Hope you have good stock!
    Certainly don't mind and yes I have a good stock currently.

  5. #5
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    Photos of the 500mW diode zoomed in:

    Some strange marks on the chip, could be from the bonding wire machine, see better on the 4th photo, oddly this is exactly the same on each diode.

    Will try and get a better photo in a bit.

    Be interested to see a de canned 300mW version zoomed in.
    Last edited by andyf97; 04-23-2012 at 05:42. Reason: updates

  6. #6
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    nice photos any running tests yet?
    i will try to get a better image.
    Click image for larger version. 

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  7. #7
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    Quote Originally Posted by kiyoukan View Post
    nice photos any running tests yet?
    i will try to get a better image.
    Click image for larger version. 

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    Interested to see if the chip has those marks too. SO you'll have to use a digital microscope.

    Should be doing some tests later today or tomorrow.

  8. #8
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    here is the best photo of my 300mw diode i can do, i got 2 more uploading from my phone that i will put on here.
    This is phone plus 3 lenses to get that close




    So the 500mw version looks to have 2x the bond wires.
    So that is good news.
    Last edited by kiyoukan; 04-23-2012 at 06:43.

  9. #9
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    oh, ok. now it is clear.
    andy is posting a 500mw while kiyoukan is posting a decaned 300mw

    and yes, these bond wires look like good news. let's see what happens during testing
    "its called character briggs..."

  10. #10
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    Seams that little mark is a connection going to something on the side. maybe its a thermal cutout which would explain a few interesting things about these diodes, on the other hand it could be just a manufacturing defect but funny its looking the same on every diode..

    So, 4 bond wires indeed, longer die, back heat deflector, and a possible thermal cutout/esd or bad manufacturing?.

    Given the 300mW was reaching 900+ mW at extremes, I think this is going to top the 1W.

    In a bit am going to mount a 300 next to a 500 to do a without lens beam profile comparison.

    Attachment 31867

    Attachment 31868

    Attachment 31869

    Attachment 31870

    Attachment 31871



    Anyone fancy replacing that mirror.
    Attachment 31872



    Bugger me if that does not look like a Mitsubishi Logo.

    Attachment 31873
    Last edited by andyf97; 04-23-2012 at 07:38.

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