n00b question about driver voltage

Hello, folks. I have some TO-5 1W 808nm diodes I want to do some bench experimenting with. I also have a BDR-209 405nm diode coming. Eventually I'd like to be able to run more powerful diodes as well.

I'm looking at getting a SDL / IDL-820 type driver to support this work.

The 808 and 405 diodes run at different voltages.

Can the IDL-820 be adjusted for this? I see that the current levels can be set, but don't see anything about voltage.

Can somebody hit me with the clue stick?

Thanks.