I couldn't find this in the search so I hope that I'm not repeating a question that's been asked already. I'm using a driver board that monitors the photodiode feedback in a laser diode to maintain constant power. This works fine with my single LD but I am wondering if it is possible to put more than one LD in series? These are 3 pin LDs (LD anode, LD cathode/PD anode, and PD cathode). Any thoughts on how to wire these? Can I simply put the LD pins in series?