Multiplexing and transmission systems for all-optical networks

These systems are investigated as an application of new line coding schemes called paired block codes and multiblock codes, which use coding rule violations to simplify transmission frame structures so that limited functions of optical logic can be applied for processing. Redundancies are utilized for clock recovery through logical processing. The upper bound efficiency of this type of code and the jitter due to imperfect logical clock recovery are analyzed. An application of this type of line code to the multiplexing system for all-optical networks is investigated. Future superbroadband cross-connect systems are used as examples to compare wavelength division multiplexing, time division multiplexing and photonic TDM which is especially promising in super-high-speed applications (e.g. above 10 Gb/s). The application of a paired block code with a 3/1B4B format to such superbroadband multiplexing is studied. Multiplexing of STM 4 (600-Mb/s) signals into an all-optical frame format with 20- to 30-Gb/s capacity is investigated to demonstrate the efficacy of this type of multiplexing scheme