Can’t go wrong with either DTR or that diode. Those diodes will produce at least 1.3 watts out of an AR coated collimator lens. Much depends upon the heat sink to keep it cool enough to have a long life.
The spec. sheet says max 2.3 amps, but you know what we do, we run them higher. Someone may have already posted where the "knee" is at for those diodes (it can vary some between individual diodes of the same type), or the place where increasing the current no longer produces a linear increase of output, but I have not seen it yet.
Testing to find where the knee is at is just to find a fairly safe place to operate it at, you don't want to set the current on the diode where increasing it no longer produces a linear smooth increase of output, keep it below that by some healthy percentage. Anyone have a rule of thumb for that?
You can go to the DTR LPF google store and see photo's where he has tested many diodes to find the knee showing both the voltage and currents throughout the test, that should give you an idea, then look where he recommends to run the diode at to extrapolate a percentage which may vary between models, I don't know.