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Thread: 1W 520nm Nichia Laser Diode TEST

  1. #1
    Join Date
    May 2011
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    Germany (Kassel)
    Posts
    264

    Default 1W 520nm Nichia Laser Diode TEST

    Hi guys,

    Today my 1W 520nm Nichia diode arrived. An amazing piece of green

    As you can see the pins are not placed in the center which makes it a bit tricky to mount with standard brass mounts where the pin hole at the backplate is placed in the center but it works.

    For all tests I used an aspheric lens with an NA=0,53 and FL=4,6mm
    As correction optics I´ve chosen anamorphic prisms and set them up for 2x mangification.

    Without correction the beam at the output is a little bit tighter as of the 1,6W 445nm diode. The threshold current is about 300mA. I´ve only driven it to 1W behind the lens @ 1600mA. According to the datasheet the max. current is 1,8A but there is no operation current given. So I did not drive it above. Another reason is that I only got 1pc.

    Pictures tell more than words. So.....

    Click image for larger version. 

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    Last edited by lasertack; 01-16-2014 at 07:50.

  2. #2
    Join Date
    Apr 2008
    Location
    Amsterdam, NL
    Posts
    2,098

    Default

    Thank you very much for posting these results. Much appreciated. This proofs the diode is a perfect replacement for a DPSS green.


    Maurice.

  3. #3
    Join Date
    Jul 2007
    Location
    west sussex uk
    Posts
    2,280

    Default

    awesome news thanks for posting , look forward now to the prices dropping to <$200
    When God said “Let there be light” he surely must have meant perfectly coherent light.

  4. #4
    Join Date
    May 2011
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    Germany (Kassel)
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    264

    Default

    will take some months or maybe a year. the mass production will start by the end of March.
    Last edited by lasertack; 01-18-2015 at 05:32.

  5. #5
    Join Date
    Jul 2010
    Location
    Netherlands
    Posts
    3,314

    Default

    Looks great but the diodes are too expensive so far. Not sure but how great does the orange and yellow look with this diode?

  6. #6
    Join Date
    Jan 2013
    Location
    Salem, OR
    Posts
    147

    Default

    lasertack, I love you I've been looking for this info for a while now, as the specs sheets I've seen surface for this diode have been lackluster at best.

    Also, PM incoming about the pin placement.
    Neat!

  7. #7
    Join Date
    Aug 2010
    Location
    Belgium
    Posts
    295

    Default

    If I understand your measurement, it is possible to have a 3.5mm beam width and 0.6mrad of divergence? (with a x4 magnification)

    What is the height of the beam at the output?


    Next step : set the temperature at 0°C and try @t 2500mA .

    Thanks for sharing

    --- www.neodym.be ---

  8. #8
    Join Date
    May 2011
    Location
    Germany (Kassel)
    Posts
    264

    Default

    I dont know what the best possible result is. I had to do it quick for my customer. Had not much time to play with. It´s up to you to put it into liquid nitrogen and shoot 100A through it

    Could be a nice experiment. Maybe I need to visit my old university

  9. #9
    Join Date
    Jun 2008
    Posts
    286

    Default

    here are some pictures with 800mW output on my 1w 520 diode's ( safly)
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    more on my facebook.
    ps. i love the colours!
    this projector is a beamshow projector with uncorrected green and bleu diode I-shape and correcte 638nm
    i bring it to the LEM saterday

  10. #10
    Join Date
    May 2011
    Location
    Germany (Kassel)
    Posts
    264

    Default

    Nice to see them performing in a projector.

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