Towards dynamic ultrahigh capacity symmetric bidirectional indoor optical-wireless communication

By implementing optical carrier reuse concept, we demonstrate a novel full-duplex optical-wireless communication system using a reflective-modulator chip at the user terminal, equipped with localization/tracking functionalities, with unshared symmetric capacity of up to 40Gb/s

Full-Duplex Bidirectional Indoor Steerable OWC System using Orthogonal Polarization States

To avoid beam-steering at users, we propose the use of same wavelength for down and upstream to realize a full-duplex bidirectional architecture using off-the-shelf XFP transceivers. Symmetric data rate of 10 Gbps is experimentally demonstrated by implementing orthogonal polarization states to mitigate the reflection crosstalk

Full-Duplex Bidirectional Indoor Steerable OWC System using Orthogonal Polarization States

To avoid beam-steering at users, we propose the use of same wavelength for down and upstream to realize a full-duplex bidirectional architecture using off-the-shelf XFP transceivers. Symmetric data rate of 10 Gbps is experimentally demonstrated by implementing orthogonal polarization states to mitigate the reflection crosstalk.</p

50 Gb/s indoor optical wireless communication equipped with millimeter-wave backup system and localization and tracking

Using photonic integrated circuits, we propose a full-duplex optical-wireless system backed up by a simple 60GHz-radio system to realize highly reconfigurable and reliable wireless links equipped with localization and tracking functionalities which provide transmission rates of 50Gb/s per user

A low-latency real-time PAM-4 receiver enabled by deep-parallel technique

High-speed photonic networks using digital signal processing (DSP) techniques are flourishing nowadays to meet the high-bandwidth requirements of modern bandwidth-thirsty applications in a cost-effective manner. However, the additional latency introduced by DSP is hindering the latency-critical applications. In this paper, a FPGA-based real-time low-latency four-level pulse amplitude modulation (PAM-4) receiver including digital adaptive equalization (DAE) is designed and implemented by using a latency-reducing parallel architecture. The DSP-introduced latency in the receiver end is analyzed in detail. As for DAE parallel implementation, a novel re-allocation scheme is proposed to cope with the issue of the dependency of the output on the successive input samples, and a look-ahead computation technique is introduced to improve the adaptive update efficiency. A real-time PAM-4 receiver is demonstrated in an experimental fiber link with 2.5 Gbit/s data rate for the performance evaluation. Compared with offline processing with MATLAB, the BER performance has little deterioration at 7% FEC limit of 1 × 10−3. With the help of the proposed deep-parallel technique, the DSP-introduced latency is reduced to 0.4μs on average, which better meets the requirements of latency-sensitive user cases in 5G networks. Furthermore, the real-time PAM-4 receiver could be flexibly reconfigured for various scenarios with low-latency requirements, and the latency-efficient parallel technique as well as the latency analysis method can also be extended to high-speed hardware implementation for data rates up to 100 Gbit/s or more

CWDM broadcast and select home network based on multimode fibre and a passive star architecture

We present a high capacity home network based on a multimode passive star and WDM technology, implementing triple play over IP, P2P Gigabit Ethernet and TV broadcasting. Issues concerning the use of MMF are discussed

Routing of 2Gb/s wireless IR-UWB and 1.25Gb/s wired services for in-building networks

We demonstrate, for the first time, simultaneous routing of wireless 2 Gb/s IR-UWB and 1.25 Gb/s wired services using XGM-SOA. This technique has potential applications for integration of wireless and wired services for in-building networks

Multiband 4G and gigabit/s baseband transmission over large-core GI and SI POFs for in-home networks

We demonstrated the simultaneous transmission of a multiband 4G (i.e. LTE-A) and gigabit/s baseband signals over 35m of 1mm core diameter PMMA GI and SI POFs. The transceiver consists of a Fabry-Perot 650nm laser diode and p-i-n photodiode. The LTE-A was transmitted with Analog-RoF technique, using a simple equalisation method. 12 LTE-A bands and a 1.9Gb/s 4-PAM baseband signal were co-transmitted over the GI-POF. 7 LTE-A bands and a 1.7Gb/s 4-PAM signal were co-transmitted over the SI-POF. The equalisation technique showed to be an effective method to increase the link throughput, hence enabling POF to be an excellent candidate for an in-home network infrastructure.</p

Multiband 4G and gigabit/s baseband transmission over large-core GI and SI POFs for in-home networks

We demonstrated the simultaneous transmission of a multiband 4G (i.e. LTE-A) and gigabit/s baseband signals over 35m of 1mm core diameter PMMA GI and SI POFs. The transceiver consists of a Fabry-Perot 650nm laser diode and p-i-n photodiode. The LTE-A was transmitted with Analog-RoF technique, using a simple equalisation method. 12 LTE-A bands and a 1.9Gb/s 4-PAM baseband signal were co-transmitted over the GI-POF. 7 LTE-A bands and a 1.7Gb/s 4-PAM signal were co-transmitted over the SI-POF. The equalisation technique showed to be an effective method to increase the link throughput, hence enabling POF to be an excellent candidate for an in-home network infrastructure