title: Free-space transmission with passive 2D beam steering for multi-gigabit-per-second per-beam indoor optical wireless networks.
abstract: In order to circumvent radio spectrum congestion, we propose an innovative system which can provide multiple infrared optical wireless beams simultaneously where each beam supports multi-gigabit-per-second communication. Scalable two-dimensional beam steering by means of wavelength tuning is proposed. A passive beam-steering module constructed with cascaded reflection gratings is designed for simultaneous multi-user coverage. We experimentally characterized the beam-steered system and thoroughly evaluated the performance of steered channels using the spectrally efficient and robust discrete multitone modulation in a bandwidth-limited system deploying 10 GHz telecom transceivers. This study reports the achievement of at least 37 Gbps free-space transmission per beam over a distance of up to 2 m over 5.61° × 12.66° scanning angles.
authors.forename: Chin Wan
authors.initials: CW
authors.lastname: Oh
authors.forename: Zizheng
authors.initials: Z
authors.lastname: Cao
authors.forename: Eduward
authors.initials: E
authors.lastname: Tangdiongga
authors.forename: Ton
authors.initials: T
authors.lastname: Koonen