Homebrew PCBs

>With 100mW laser I
>need to switch it on and off at 1MHz rate.

BJT is slow. Use  fets.
Also, "pre-heat" the laser diode with some 10% current with a resistor.


Why that speed? I guess you expose point by point.

I suggest you to convert the normal Gerber output to HPGL (that means 
lines instead of points)
and to use it as in a plotter. No speed problem here.

I've bought such a program. If you think to go that way, you can mail 
me your Gerber and I'll send you
back, for free, the converted HPGL.
By your name you are from ex-Jugoslavia. I'm Rumanian.
Cristian