How Sensitive are Laser Diodes, Really?
When asked the question: “How sensitive are laser diodes to drive and handling?”, there will likely be a variety of responses from either side: “I just connected a bare laser diode to an automobile battery without any other components and it is working just fine. I have never used any ESD precautions. In fact, I have a wool sweater on at this moment and can draw some really juicy sparks from everything I touch.” through: “I have blown several hundred laser diodes and I have been following all the manufacturer’s guidelines with respect to ESD protection and drive. I am even using their recommended circuit layout and $4,000 power supplies. Nothing seems to help.” Not all laser diodes are created equal and their susceptibility to damage through improper handling or improper drive likely varies widely. Here is a discussion of some of the issues: (From: Eric Rechner (eric_r@3dm.com).) “Does anyone have any experience with Hitachi laser diode HL7843MG 5 mW 780nm? I find this diode to be poss
