the other lasers inside the diode, I believe it has a red and another one, but they are not worth the troubble because they have low powwer. just go for the blu-ray part of the diode!
yeah one is red, which is about 1 mW, and the other is IR, which is less than 1 mW im sure. so yeah, pretty much just use the violet one! I made one about a week ago, it is AMAZING. its my first laser, and I love it.