I want to run a laser diode from a battery with a minimal setup.
Suppose that I add a capacitor in parallel with the laser diode as to prevent any voltage spikes and a series resistor as to limit the current flowing through the LD (taking into account the maximum input voltage).
What problems could be expected from such setup? Would adding a fan make a difference?
It would not really matter if the input voltage causes the LD to lower its light intensity as battery drains.