Optical device for processing a predetermined N-bits optical sequence

摘要

An optical device (6) for processing an input optical serial sequence (1000) of phase-modulated N-bits having a predetermined one-bit time slot in order to compare said input optical serial sequence (1000) of phase-modulated N-bits with a predetermined sequence of N-bits, said device comprising a) input means (64) for said input optical serial sequence (1000) of phase-modulated N-bits; b) a first optical element (61; 701) for converting said input optical serial sequence (1000) of phase-modulated N-bits into an optical parallel pattern (3000) of phase-modulated N-bits carrying the same information as said input optical serial sequence (1000) of phase-modulated N-bits; c) a second optical element (616; 619; 62; 704) capable of causing a phase delay of at least one bit of said optical parallel pattern (3000), said phase delay having a preselected value depending on said predetermined N-bits sequence.