to COD or not to COD

[phenol]

this is the front facet of a red 1-5mW chip-on-board LD into which i put catastrophic amount of current (on purpose ). naturally, it doesnt lase anymore. the junction is electrically intact, which suggest that it suffered COD. The colored archs werent there prior to the "accident". The innermost oval is where the actual laser beam emerges. the facet in this tiny region is probably ruptured and the AR coating /blue stuff/ is oxidized.

 

[roSSco]

How did you take such a close picture?

 

[phenol]

with a 500x microscope and a 1x webcam
here are some more pics of a similar thing in action:
http://www.laserpointerforums.com/forums/YaBB.pl?num=1193741215/15

 

[Kenom]

I think those pictures explain how we get bars off to the sides of the dot on our red diy's

 

[knimrod]

I think those pictures explain how we get bars off to the sides of the dot on our red diy's

I was thinking the same thing...

 

[wooooooolazer]

That does make sense, know if only we could buy another mirror like that and somehow take off the old one and put that one on, we could bring all our dead diodes back to life.

...lazer... ;D ;D ;D

 

[phenol]

That does make sense, know if only we could buy another mirror like that and somehow take off the old one and put that one on, we could bring all our dead diodes back to life.

...lazer... ;D ;D ;D

the 'mirror' is actually the facet of the chip itself. once it melts, there is no way back. even god and all saints are helpless

 

[JLSE]

Crazy?

Has anyone evr tried repairing a static damaged diode? I was thinking how possible it may be to repair those fine brass contacts. Obviously they are tiny, but just for the sake of trying I think it would be an interesting challenge :

 

[roSSco]

Re: Crazy?

Has anyone evr tried repairing a static damaged diode? I was thinking how possible it may be to repair those fine brass contacts. Obviously they are tiny, but just for the sake of trying I think it would be an interesting challenge :

You are talking about two different things. Static destroys the P-N junction. Too much current burns up the wires going to the diode. It's safe to say it's a lost cause either way.

 

[JLSE]

Since ive started playing with these diodes, I have aquired quite a grave yard collection, I must have 20 dead 808's 780's and 680's. It would be nice to find a way to turn them into zombies but they gave their life in the name of science so thats ok too ;D...