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For those that might still read this thread.....quite a time later (5-6 weeks) I tried upping the voltage from 2.1V to 2.4V and hey presto! I was able to increase the current to 1W. I assume that the 2.1V was too close to the cut off voltage specified (2V).......will post more when I get around...

Well, I tried what Cyparagon said in his last post........the laser did lase and the current did vary from almost zero but only to 0.3 A (not the 3A as specified)... I am wondering if I misread the "specs" for the constant current driver. It did say 3A output; but it did also say something...

Hi Folks, thanks for the replies. I will be getting some diodes and resistors tomorrow and will let you know how I get on (for anyone else that is interested). One thing that is funny is that the instructions for setting the current states that I should measure in short circuit mode......which...

Thanks for the reply....I guess I left out some details that I thought you wouldn't need..... 1. You need the laser diode to be in a module. (It is in one) 2. You need that module to be in a heat sink. (It is in one) 3. You need a focusing lens (yes I have that too - glass) 4. 1W of 808 is not...

Hi , I have recently bought an IR high power laser (see here http://www.ebay.ie/itm/261007928485?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649#ht_3122wt_1186). I also bought what I think is an adequate driver for this laser (see here...