Recently I am planning setting up a high power 808nm fiber couple laser pumping system by using a Coherent FAP-800 40W LD. I already got all the parts I need, but drivers. There seems no driver on the market can handle such a high current that diode needs with lower cost. And by high current, I mean over 30A. It seems I have to build one myself, because I don't want to spend $300 to buy a 50A PSU just for the diode use. I need this driver supply current at least 40A, 60 will be great. Also I hope I can modulate control my driver, TTL or analog even PWM, either one will be fine. Can anyone give me some ideas. :bowdown: