DESIGN OF MULTIMIRROR STRUCTURES FOR HIGH-FREQUENCY BURSTS AND CODES OF ULTRASHORT PULSES

A stack of multiple mirrors may be used to change one short pulse into a carefully crafted burst with a designed envelope. For example, 800- GHz bursts, digital pulse codes, and other discrete time signals are r eported here. The direct design of these structures is problematic. Th ough linear and causal, their impulse response is nonlinear with respe ct to the reflection coefficients of the mirrors. However, if we repre sent the structure's energy transfer laws as a product 2 x 2 scatterin g matrices then we can determine the reflection coefficients needed to produce a desired response using a recursive layer-peeling procedure that bypasses some tedious mathematics.