title: Demonstration of hybrid orbital angular momentum multiplexing and time-division multiplexing passive optical network.
abstract: Mode-division multiplexing passive optical network (MDM-PON) is a promising scheme for next-generation access networks to further increase fiber transmission capacity. In this paper, we demonstrate the proof-of-concept experiment of hybrid mode-division multiplexing (MDM) and time-division multiplexing (TDM) PON architecture by exploiting orbital angular momentum (OAM) modes. Bidirectional transmissions with 2.5-Gbaud 4-level pulse amplitude modulation (PAM-4) downstream and 2-Gbaud on-off keying (OOK) upstream are demonstrated in the experiment. The observed optical signal-to-noise ratio (OSNR) penalties for downstream and upstream transmissions at a bit-error rate (BER) of 2 × 10(-3) are less than 2.0 dB and 3.0 dB, respectively.
authors.forename: Andong
authors.initials: A
authors.lastname: Wang
authors.forename: Long
authors.initials: L
authors.lastname: Zhu
authors.forename: Jun
authors.initials: J
authors.lastname: Liu
authors.forename: Cheng
authors.initials: C
authors.lastname: Du
authors.forename: Qi
authors.initials: Q
authors.lastname: Mo
authors.forename: Jian
authors.initials: J
authors.lastname: Wang