I have test the current and voltage on my driver board, not LD, I have study Lazzerer's post, can't confirm where is the current and voltage? If i should test the current at LD 2 pins?
If you run it at 2 A you could hit 2 W with a 3 element glass lens if your diode is efficient, but it is not recommended as the current is a little high for an M140 and at this power internal reflections (with a 3 element glass or cheap uncoated lens) could damage the diode. A G1 or G2 would definitely be preferable.
It should be Nichia NDB7875, I can't confirm. it's typical power is 1.6w. this is the the user manual for NDB7875 LD: www.bolostage.com/img/NDB7875-E.pdf
Well that sure does look like our 9mm diodes there... We've gone from 1W 445 diodes to 1.6W... And we always try to double what they rate them for, so let's go 3.2W builds :eg: