SOH-DS2A?

[desubot]

this is my first laser project and well i messed up my first 2 LDs from my first 2 dvd burners, but now out of bordem i took apart my old samsung dvd player and got the LD out of that but iv never seen a 4 pronged LD b4 and cant find any information on it any help would be nice.

 

[daguin]

this is my first laser project and well i messed up my first 2 LDs from my first 2 dvd burners, but now out of bordem i took apart my old samsung dvd player and got the LD out of that but iv never seen a 4 pronged LD b4 and cant find any information on it any help would be nice.

I would have to look up the model, but usually the four pin diode is a combination diode. Probably red and IR.

Peace,
dave