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Thread: 445nm diode died, Sad day

  1. #1
    Join Date
    Aug 2010
    Location
    Virginia
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    Default 445nm diode died, Sad day

    Ok so yesterday I finished my laser I was building and it died here is what I did

    After I finished the laser I set the driver to 250mA and then connected the laser diode and turned it on the laser and it lased at like less than a mW so I slowly turned up the diode control until the laser lit an when it did it was super bright. Nowhere near one watt much lower.
    so after that I turned it off and about ten minutes later I turned it on and lit a match with it at the focal point lit a match with it to test the power.
    later I turned it on again aimed it against the wall and slowly turned it to focus it into a beam but as I was turning the lens a hug black spot formed in the middle of the dot on the wall.
    After looking at the diode it looked like this http://82.69.127.162/images/lazor_im...Window_PHR.jpg
    only on mine the window was also cracked up.
    I was told to fix it I would have to decan it but when I tilted it the hole fricked window fell into the diode and then fell out when I tilted down.
    now the diode emits very little blue light and even a small line of green ??
    I was told static killed it but I do not believe that for one second.

    after talking to some people I have found out that the AR coating is missing on the bottom concave lens that faces the diode.
    so for now I guess I am screwed.

    the driver I used was this
    http://www.ultralasers.com/proinfo.p...age=1&featured
    and I used an N-Type ham radio dummy load for heat-sinking

    At SELEM a guy offered me another 445nm diode for 4 laserbugs I won in a raffle
    now i regret not accepting it.
    Last edited by Lazerman121; 03-06-2011 at 09:34.
    Lasers
    405nm violet(blue-ray) laser-eBay I fixed it ya
    473nm 10mW LSR473NL series blue laser module www.lasever.com review
    488nm 5mW Novalux Protera DPSS Laboratory Unit
    532nm 5mW green laser www.elitelasers.com
    650nm 5mW red

  2. #2
    Join Date
    Aug 2010
    Location
    Virginia
    Posts
    145

    Default

    Any one have any similar problem happen to theirs
    Lasers
    405nm violet(blue-ray) laser-eBay I fixed it ya
    473nm 10mW LSR473NL series blue laser module www.lasever.com review
    488nm 5mW Novalux Protera DPSS Laboratory Unit
    532nm 5mW green laser www.elitelasers.com
    650nm 5mW red

  3. #3
    Join Date
    Jun 2010
    Location
    NW Montana, USA
    Posts
    11

    Default

    I have 8 of the 445 Cas. diodes. I never run them without heat sink, and always keep the current under 1.2A (no TEC). I have blown up one out of 8. It still lases, but I can't focus a good beam, it looks all spattered on the wall. The window of the diode can looks like it has a dark spot on it, I can't see inside to see the actual die.

    Overall, I would say they are very robust, hard to kill. But, accidents do happen.

    My condolences on your blown up one, Lazerman.

    -
    Greg
    Those blue photons are the prettiest.

  4. #4
    Join Date
    Jan 2007
    Location
    Florida
    Posts
    4,382

    Default

    I blew up a $200 diode once (636nm/ 150mW), so don't feel too bad, as these 445 are now under $40, right? My condolences too, though. Dig a litttle hole and put a headstone on it saying: "Here Lies a little Bluey, He went Ka-Pooey. A short life he had, makes us all sad, The funeral's tomorrow around two-ey."

    (sorry for you loss)

  5. #5
    Join Date
    Jun 2010
    Location
    NW Montana, USA
    Posts
    11

    Default

    ROFL, Steve-O.

    Literally LOL.
    Those blue photons are the prettiest.

  6. #6
    Join Date
    Sep 2008
    Posts
    216

    Default

    Does anyone else remember when we paid $360 for a 6X burner just to rip the diode out to get 200mW of violet? I blew a couple of those at the time.

    Remember, only dragons live forever.

    Get another diode and climb back on the projector

    Peace,
    dave

  7. #7
    Join Date
    Aug 2010
    Location
    Virginia
    Posts
    145

    Default

    unless I can get one for $40 I'm stuck.
    I am broke until summer
    Lasers
    405nm violet(blue-ray) laser-eBay I fixed it ya
    473nm 10mW LSR473NL series blue laser module www.lasever.com review
    488nm 5mW Novalux Protera DPSS Laboratory Unit
    532nm 5mW green laser www.elitelasers.com
    650nm 5mW red

  8. #8
    Join Date
    Sep 2008
    Posts
    216

    Default

    Quote Originally Posted by Lazerman121 View Post
    unless I can get one for $40 I'm stuck.
    I am broke until summer
    http://www.photonlexicon.com/forums/...-1-watt-diodes

    Maybe he'll do a round three

    Peace,
    dave

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