title: Launch device using endlessly single-mode PCF for ultra-wideband WDM transmission in graded-index multi-mode fiber.
abstract: We demonstrated ultra-wideband wavelength division multiplexing (WDM) transmission from 850 to 1550 nm in graded-index multi-mode fiber (GI-MMF) using endlessly single-mode photonic crystal fiber (ESM-PCF) as a launch device. Effective single-mode guidance is obtained in multi-mode fiber at all wavelengths by splicing cm-order length ESM-PCF to the transmission fiber. We achieved 3 × 10 Gbit/s WDM transmission in a 1 km-long 50-μm-core GI-MMF. We also realized penalty free 10 Gbit/s data transmission at a wavelength of 850 nm by optimizing the PCF structure. This method has the potential to achieve greater total transmission capacity for MMF systems by the addition of more wavelength channels.
authors.affiliation: Access Network Service Systems Laboratories, NTT Corporation, 1-7-1 Hanabatake, Tsukuba, Ibaraki, 305-0805, Japan.ma.lin@lab.ntt.co.jp
authors.forename: Lin
authors.initials: L
authors.lastname: Ma
authors.forename: Nobutomo
authors.initials: N
authors.lastname: Hanzawa
authors.forename: Kyozo
authors.initials: K
authors.lastname: Tsujikawa
authors.forename: Yuji
authors.initials: Y
authors.lastname: Azuma