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Opt Express. 2012 Apr 23;20(9):9396-402. doi: 10.1364/OE.20.009396.

Demonstration of free space coherent optical communication using integrated silicon photonic orbital angular momentum devices.

Author information

1
Department of Electrical and Computer Engineering, University of California, Davis, CA 95616, USA.

Abstract

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.

PMID:
22535028
DOI:
10.1364/OE.20.009396
[Indexed for MEDLINE]

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