TomGeorge:
If I was a phototransistor, I wouldn't be happy with any power laser being drilled into me.Tom...
Tom
Thanks for the datasheet! Would love to know where you were able to find it! 
I basically wanted to use the phototransistor to determine where my stepper motor was positioned. I'm using the stepper to fan out a laser, but I need to be able to determine where the rotation is on the stepper. I believe this method could work; but as mentioned earlier and after some thought last night I think I could do this easier with a limit switch and just have the mirror that's attached to the stepper trigger that switch. In doing so I can leave the laser off until the mirror is in the correct position to start the fan.