Demonstration of 1.25 Gb/s $\,\times \,$8-Channels ECDM Using Eight-Chip Electrical Coding

In this letter, 1.25 Gb/s × 8-channels simultaneous multiplexing using 8-chip electrical codes is experimentally demonstrated for the downlink of a 10-Gb/s electrically code-division-multiplexing passive optical network (ECDM-PON) system. For electrical encoding and decoding, 10-Gb/s multilevel signal generation and 10 Gchip/s correlator as a decoder are utilized. We demonstrate 10-Gb/s ECDM error-free optical transmission over 20 km of single-mode fiber.