HELP identify diodes - weird looking

[WonHungLow]

what type of laser diodes are these...
i put a regular IR diode in the pix for size comparison

 

[jamilm9]

did you open a samsug drive. Those sometimes have those

 

[WonHungLow]

yes TS-L532R. what are they though? i know diodes, but what kind

 

[flame_minion]

iv got a couple from a laptop dvd drive
can i do anything with them and what contacts are the positive, negative, and ground