Open AccessDemonstration of free space coherent optical communication using integrated silicon photonic orbital angular momentum devices
Author(s) -
Tiehui Su,
Ryan P. Scott,
Stevan S. Djordjevic,
Nicolas K. Fontaine,
David J. Geisler,
Xinran Cai,
S. J. Ben Yoo
Publication year - 2012
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.20.009396
Subject(s) - multiplexing , phase shift keying , multiplexer , physics , optics , photonics , orbital angular momentum multiplexing , keying , angular momentum , polarization division multiplexing , photonic integrated circuit , silicon photonics , wavelength division multiplexing , bit error rate , computer science , telecommunications , orbital angular momentum of light , decoding methods , total angular momentum quantum number , wavelength , quantum mechanics
We propose and demonstrate silicon photonic integrated circuits (PICs) for free-space spatial-division-multiplexing (SDM) optical transmission with multiplexed orbital angular momentum (OAM) states over a topological charge range of -2 to +2. The silicon PIC fabricated using a CMOS-compatible process exploits tunable-phase arrayed waveguides with vertical grating couplers to achieve space division multiplexing and demultiplexing. The experimental results utilizing two silicon PICs achieve SDM mux/demux bit-error-rate performance for 1‑b/s/Hz, 10-Gb/s binary phase shifted keying (BPSK) data and 2-b/s/Hz, 20-Gb/s quadrature phase shifted keying (QPSK) data for individual and two simultaneous OAM states.
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