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Thread: 9mm 445 Nichiam Laser diode

  1. #1
    Join Date
    Jan 2012
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    Default 9mm 445 Nichiam Laser diode

    I Test 3 different diodes to try to get a better idea of them.

    Test was done on all 3 diodes one after another in the same Heatsink,module,G1 lens, Power supply & Ophir Laser Power Meter etc.

    Here is the Simply heatsink and Ophir LPM sensor setup:


    The DMM is the LPM Reading since my other display on my Ophir head only went up to 2A i used my DMM for the Display:

    Each Mark was done in 50mA intervals waiting 1 minute in between each reading.

    Diode (1).........

    Currant - Voltage - mW
    150mA - 3.6V - 10mW
    200mA - 3.7V - 80mW
    250mA - 3.8V - 160mW
    300mA - 3.8V - 250mW
    350mA - 3.9V - 320mW
    400mA - 4.0V - 410mW
    450mA - 4.0V - 500mW
    500mA - 4.0V - 580mW
    550mA - 4.1V - 650mW
    600mA - 4.1V - 730mW
    650mA - 4.1V - 820mW
    700mA - 4.2V - 900mW
    750mA - 4.2V - 970mW
    800mA - 4.2V - 1050mW
    850mA - 4.3V - 1130mW
    900mA - 4.3V - 1210mW
    950mA - 4.3V - 1270mW
    1000mA - 4.4V - 1340mW
    1050mA - 4.4V - 1420mW
    1100mA - 4.4V - 1490mW
    1150mA - 4.4V - 1550mW
    1200mA - 4.5V - 1620mW
    1250mA - 4.5V - 1700mW
    1300mA - 4.5V - 1760mW
    1350mA - 4.5V - 1815mW
    1400mA - 4.6V - 1900mW
    1450mA - 4.6V - 1950mW
    1500mA - 4.6V - 2000mW
    1550mA - 4.6V - 2055mW
    1600mA - 4.6V - 2110mW
    1650mA - 4.6V - 2150mW
    1700mA - 4.6V - 2200mW
    1750mA - 4.7V - 2250mW
    1800mA - 4.7V - 2310mW
    1850mA - 4.7V - 2370mW
    1900mA - 4.7V - 2405mW
    1950mA - 4.7V - 2440mW
    2000mA - 4.8V - 2460mW
    2050mA - 4.8V - 2480mW
    2100mA - 4.8V - 2505mW
    2150mA - 4.8V - 2520mW
    2200mA - 4.8V - 2540mW
    2250mA - 4.8V - 2567mW
    to
    2300mA - 4.8V - 2495mW Dimmed................
    No Damage


    Diode (2).........

    Currant - Voltage - mW
    150mA - 3.6V - 10mW
    200mA - 3.7V - 90mW
    250mA - 3.8V - 165mW
    300mA - 3.8V - 250mW
    350mA - 3.9V - 325mW
    400mA - 4.0V - 415mW
    450mA - 4.0V - 500mW
    500mA - 4.0V - 570mW
    550mA - 4.1V - 650mW
    600mA - 4.1V - 720mW
    650mA - 4.1V - 830mW
    700mA - 4.2V - 900mW
    750mA - 4.2V - 970mW
    800mA - 4.2V - 1060mW
    850mA - 4.3V - 1140mW
    900mA - 4.3V - 1235mW
    950mA - 4.3V - 1290mW
    1000mA - 4.4V - 1360mW
    1050mA - 4.4V - 1425mW
    1100mA - 4.4V - 1495mW
    1150mA - 4.4V - 1555mW
    1200mA - 4.5V - 1640mW
    1250mA - 4.5V - 1710mW
    1300mA - 4.5V - 1770mW
    1350mA - 4.5V - 1825mW
    1400mA - 4.6V - 1895mW
    1450mA - 4.6V - 1955mW
    1500mA - 4.6V - 2010mW
    1550mA - 4.6V - 2045mW
    1600mA - 4.6V - 2105mW
    1650mA - 4.6V - 2150mW
    1700mA - 4.6V - 2205mW
    1750mA - 4.7V - 2250mW
    1800mA - 4.7V - 2320mW
    1850mA - 4.7V - 2350mW
    1900mA - 4.7V - 2405mW
    1950mA - 4.7V - 2430mW
    2000mA - 4.8V - 2470mW
    2050mA - 4.8V - 2485mW
    2100mA - 4.8V - 2505mW
    to
    2150mA - 4.8V - 2380mW Dimmed................ "This one Dimmed alot"
    No Damage



    Diode (3).........

    Currant - Voltage - mW
    150mA - 3.6V - 10mW
    200mA - 3.7V - 80mW
    250mA - 3.8V - 180mW
    300mA - 3.8V - 270mW
    350mA - 3.9V - 310mW
    400mA - 4.0V - 420mW
    450mA - 4.0V - 505mW
    500mA - 4.0V - 585mW
    550mA - 4.1V - 660mW
    600mA - 4.1V - 750mW
    650mA - 4.1V - 820mW
    700mA - 4.2V - 890mW
    750mA - 4.2V - 990mW
    800mA - 4.2V - 1100mW
    850mA - 4.3V - 1190mW
    900mA - 4.3V - 1280mW
    950mA - 4.3V - 1370mW
    1000mA - 4.4V - 1450mW
    1050mA - 4.4V - 1540mW
    1100mA - 4.4V - 1630mW
    1150mA - 4.4V - 1710mW
    1200mA - 4.5V - 1800mW
    1250mA - 4.5V - 1885mW
    1300mA - 4.5V - 1950mW
    1350mA - 4.5V - 2035mW
    1400mA - 4.6V - 2105mW
    1450mA - 4.6V - 2190mW
    1500mA - 4.6V - 2170mW
    1550mA - 4.6V - 2255mW
    1600mA - 4.6V - 2300mW
    1650mA - 4.6V - 2350mW
    1700mA - 4.6V - 2390mW
    1750mA - 4.7V - 2430mW
    1800mA - 4.7V - 2480mW
    1850mA - 4.7V - 2530mW
    1900mA - 4.7V - 2575mW
    1950mA - 4.7V - 2610mW
    2000mA - 4.8V - 2630mW
    2050mA - 4.8V - 2645mW
    2100mA - 4.8V - 2655mW
    2150mA - 4.8V - 26750mW
    to
    2200mA - 4.8V - 2610mW Dimmed................
    No Damage


    One Big thing i Noteced is was the Voltage is Much Higher for these. Like .5V More.

    Our 5.6mm diodes are 4.2V-4.3V Maybe 4.4V "Rarely" at 1.8A.......

    I do not like this Extra Voltage and this is a Big Down Side to these diodes.



    Although there Not 3W diodes They appear to be very efficient diode. Especially the Last one. There Near 3W diodes.

    They seem to be within the same power range of each other from 150mA to 700mA. After this is where you will start to see the difference between the 3 diodes.

    Also IF your not aware of this 445nm diode very quit a bit with heat. Sometimes peak powers can range of a difference by 100mW or more sometimes.

    In this Case, I re-tested all 3 diodes about 8 hours later and got this:

    Diode 1) - 2620mW at 2.1A
    Diode 2) - 2590mW at 2.1A
    Diode 3) - 2760mW at 2.1A


    So these new 9mm 445nm diodes are on Par with the 5.6mm version of the New M&H series diode. NO Question about that

    The diodes I have all of them even the other 2 that i have not ran a Log of yet i tested them and They are all Very Efficient diodes.! The Higher One I have Now is Peaking Near 2.83W at 2.1A. This is one of the 2 i have not ran the Log Yet on and it was just a quick turn the currant up and then turn it down. SO it might even be more.

    That is by far the power-fullest diode i have owned or have seen for 445nm diode so far. Even though it was doing that at 2.1A its still more power then my other 2.8W Super Freak laser i built.
    Attached Thumbnails Attached Thumbnails nichiam.jpg  

    3 9mm 445nm PIV curve.png  


  2. #2
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    Default

    And at 3.1A I ran out of power supply, but think they have even more in them. TEC cooled to 8C, 3.33W and 3.38W

    Click image for larger version. 

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    leading in trailing technology

  3. #3
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    polishedball,

    I'm really interested in what happens to the position of the output "knee" as the temperature is lowered. Your diode has a higher limit than goldenstarmimi"s, but it should have an output drop off. Can you move this significantly by lowering the temperature?

  4. #4
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    Quote Originally Posted by planters View Post
    polishedball,

    I'm really interested in what happens to the position of the output "knee" as the temperature is lowered. Your diode has a higher limit than goldenstarmimi"s, but it should have an output drop off. Can you move this significantly by lowering the temperature?
    I need to get a larger TEC or stiffer supply for it as it couldn't maintain set point of 5C @12v 5A. So I am stuck at current results till my new bench supply arrives.
    leading in trailing technology

  5. #5
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    wow thats amazing, so much blue out of one diode!

    now if only we could get a 3W red diode that wasn't a spot light my life would be complete lol

  6. #6
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    Quote Originally Posted by flecom View Post
    now if only we could get a 3W red diode that wasn't a spot light my life would be complete lol
    We should do a T shirt with this printed on it...
    This space for rent.

  7. #7
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    I do not like this Extra Voltage and this is a Big Down Side to these diodes.
    Personaly I don't really care about the higher operating voltage. It only prevents you from running the driver from a 5vdc supply.
    To me, the efficiency curves Pin/Pout of these diodes are much more interesting.

    Click image for larger version. 

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  8. #8
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    Yes great to see such nice test results. I have build a few modules already with these and they are also easier to work with because they are bigger in size. Thanks!!!


    Interested in a system or modules? Feel free to contact us directly!

  9. #9
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    Since the linearity of the power/current scale above 500ma is non linear, is the power you get above 500ma truly useful. It seems to me it will distort the intended colors much like the knee of a dpss laser. For beams I guess it doesnt matter much but for graphics that is an issue if you want a true representation of a show. Maybe use the eye magic iris system? I have one but never installed it.

  10. #10
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    Quote Originally Posted by kecked View Post
    Since the linearity of the power/current scale above 500ma is non linear, is the power you get above 500ma truly useful. It seems to me it will distort the intended colors much like the knee of a dpss laser. For beams I guess it doesnt matter much but for graphics that is an issue if you want a true representation of a show. Maybe use the seye magic iris system? I have one but never installed it.
    But most shows for true representation would have been 473nm already so no matter what 445 would be wrong. No?
    leading in trailing technology

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