|MadSci Network: Physics|
To my knowledge this is presently science fiction. That is not to say that it is not actually possible.
The nearest things to a "bomb laser" that I can think of would be a very powerful chemical laser or a magnetohydrodynamic rail gun. You can probably find some Web sites that deal with either of these subjects.
John Link, MadSci Physicist
Try the links in the MadSci Library for more information on Physics.