title: Free-space coherent optical communication with orbital angular, momentum multiplexing/demultiplexing using a hybrid 3D photonic integrated circuit.
abstract: We demonstrate free-space space-division-multiplexing (SDM) with 15 orbital angular momentum (OAM) states using a three-dimensional (3D) photonic integrated circuit (PIC). The hybrid device consists of a silica planar lightwave circuit (PLC) coupled to a 3D waveguide circuit to multiplex/demultiplex OAM states. The low excess loss hybrid device is used in individual and two simultaneous OAM states multiplexing and demultiplexing link experiments with a 20 Gb/s, 1.67 b/s/Hz quadrature phase shift keyed (QPSK) signal, which shows error-free performance for 379,960 tested bits for all OAM states.
authors: Binbin
authors: B
authors: Guan
authors: Ryan P
authors: RP
authors: Scott
authors: Chuan
authors: C
authors: Qin
authors: Nicolas K
authors: NK
authors: Fontaine
authors: Tiehui
authors: T
authors: Su
authors: Carlo
authors: C
authors: Ferrari
authors: Mark
authors: M
authors: Cappuzzo
authors: Fred
authors: F
authors: Klemens
authors: Bob
authors: B
authors: Keller
authors: Mark
authors: M
authors: Earnshaw
authors: S J B
authors: SJ
authors: Yoo