The IC chips of a multiple IC chip module are mounted in stack in a ceramic substrate, which has good heat dissipating capability. The optical switch can be configured as an ultrafast logic gate, a switch for ultrafast communication systems or a key component of an all-optical regenerator. The invention also provides substantial improvements in the eye-safety of otherwise potentially harmful laser beams. Also, since the optical information storage medium provides standards for the transition area, it is compatible with existing optical information storage media. The adhesive element includes an inner edge, and a minimum distance between the inner edge and the outer edge is between 0 and 10 mm.