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Thanks for the help, I really like the graph. One question will be is what is the best way to remove the diode from the heat sink? I broke one earlier by pushing. Also the reason I bought the drive is because it was only $30 total with S/H and I found it probably is more than 300mw as it is 8X DL.
Registered Member #177
Joined: Wed Feb 15 2006, 02:16PM
Location: Munich, Germany
Posts: 214
Depends on the drive. Some diodes are pressed into seperate cases and then glued to the laser head. These are the easy kind. If the Diode is directly pressed into the head assembly, then you should try to cut "around" the diode hole with a hacksaw or something, then breaking it loose.
ill try it on my old sony diodes that I killed they first burned through a plastic sheet then it couldn't even shine I learned allot since then. should a 5V regulated variable current PSU be able to drive the diode?
thanks should a laser casing with a pressure mounted heat sink with lots of thermal grease and a fan work? also I will build the PSU you described Uzzors thanks.
Registered Member #177
Joined: Wed Feb 15 2006, 02:16PM
Location: Munich, Germany
Posts: 214
You dont need a fan, The critical part here is heat transfer from diode body to heat sink. Just drill a hole into it with the diodes diameter, so that you can press it into it.
BTW. You never want to use "lots of thermal grease". just enough so that small scratches, gaps and stuff like that are filled with it, rather then air.
ok thanks Ill do it when I get it I have the laser mount I am just waiting on the drive I should get it on Monday Ill tell you how it goes also I am bidding on a 1W laser on ebay it is inferred so I really need to be careful. its fiber cupples and runs at 860MW from spectra labs.
I opened the drive and found a 380mw laser diode but its not packaged as a can its flat so I returned the drive. a good hint if you want to mount these things into normal mountings dont go fore anything above 16X I also took apart a 20X drive and it had a 400mw laser but same new packaging its a flat rectangle.
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