DEVICE FOR SUBTRACTION OF OPTICAL SIGNALS Russian patent published in 1998 - IPC

FIELD: optical computer engineering. SUBSTANCE: device has three optical amplifiers 1-3, input optical splitter 4, two optical transparent groups each of which has N-1 transparent elements, group which has double-arm splitters, ring splitter 8, optical comparator 9, optical two-state element 11 and triple-arm splitter which two arms provide waveguide pair. Input of minuend is designed as input of first optical amplifier. Optical comparator input 2 serves as input of subtrahend. EFFECT: increased functional capabilities. 2 dwg