Space division multiplexing apparatus including multi-core fiber and selfhomodyne detection method

摘要

To provide a self-homodyne detection communication system capable of using a space-division multiplexing signal as a signal for communication. The present invention relates to a space-division multiplexing apparatus 12 including a multi-core fiber 11 having multiple cores. The space-division multiplexing apparatus 12 uses cores other than a core 13 for self-homodyne detection among the multiple cores included in the multi-core fiber 11 as cores 16 for communication. The space-division multiplexing apparatus is configured to include a pilot-tone guiding unit 14 and a self-homodyne detection unit 15.

主权项

1. A space-division multiplexing apparatus (12) including a multi-core fiber (11) having multiple cores, comprising:
a multiplexing unit (21) which multiplexes a signal for communication and a pilot tone for self-homodyne detection, the signal being generated by a light source (22); a pilot tone guiding unit (14) which guides the pilot tone to a first core (13) for self-homodyne detection which is one of the multiple cores in the multi-core fiber (11), the first core (13) being a center core of the multiple cores; a signal guiding unit (17) which guides the signal for communication among the signals multiplexed by the multiplexing unit (21) to second cores (16) for communication, the second cores being around center core; and a self-homodyne detection unit (15) which detects the pilot tone output from the core (13) for self-homodyne detection and performs the self-homodyne detection, wherein a diameter φs of the first core (13) for self-homodyne detection and a diameter φc of the second core (16) for communication have a relationship selected from the group consisting of 1.1≦φs/φc≦1.3 and 1.2≦φs/φc≦3.