Browsing by Author "Peng, Ching-Wei"

Now showing 1 - 6 of 6

2.333-Tbit/s bi-directional optical mobile networks using optical wireless communication (OWC)
(2020-11-15)
Wei, Liang-Yu
;
Chen, Shu-, I
;
Yeh, Chien-Hung
;
Liu, Yang
;
Chen, Guan-Hong
We propose and experimentally demonstrate a 2.333-Tbit/s bi-directional optical mobile network using optical wireless communication (OWC). The proposed network architecture is divided into: fronthaul network con-necting between the distributed-unit (DU) and the remote-radio-unit (RRU); and midhaul network connecting between the central unit (CU) and the DU. At the midhaul, an aggregated 2.333-Tbit/s transmission is achieved using wavelength division multiplexed (WDM) infrared (IR) based invisible light communication (IVLC). For the link between the RRU and user-equipment (UE), 2.7 Gbit/s white-light visible-light-communication (VLC) transmission is achieved for indoor 1.5 m transmission. It can provide communication and lighting simultaneously. A gateway (GW) is also proposed acting as the interface between the IVLC and VLC transmissions. In the proposed architecture, about 400 VLC end-users can be supported.
Design of Silicon Photonics Based Enhanced Evanescent Coupling Mode-Division Multiplexer and De-multiplexer for Footprint Reduction
(2019-01-01)
Peng, Ching-Wei
;
Cheng, Ming-Wei
;
Chen, Guan-Hong
;
Guo, Pin-Cheng
;
Tsai, Jui-Feng
A design of silicon-photonics (SiPh) based 4 x 4 enhanced-evanescent-coupling mode-division-multiplexing (EEC-MDM) multiplexer/de-multiplexer is proposed. Compared with the traditional MDM, our proposed EEC-MDM can significantly reduce the footprint while archiving similar coupling efficiencies.
Digital Signal Processing for Visible Light Communication Applications
(2019-01-01)
Chow, Chi-Wai
;
Chen, Guan-Hong
;
Peng, Ching-Wei
;
Wei, Liang-Yu
;
Yeh, Chien-Hung
We reviewed our resent works using digital-signal-processing (DSP) techniques to improve visible-light-communication (VLC). A rolling-shutter-effect (RSE) light-panel and CMOS image-sensor based VLC and a visible-light-positioning (VLP) system using machine learning are discussed.
Integrated Silicon Photonics Remote Radio Frontend (RRF) for Single-Sideband (SSB) Millimeter-Wave Radio-Over-Fiber (ROF) Systems
(2019-04-01)
Tong, Yeyu
;
Chow, Chi-Wai
;
Chen, Guan-Hong
;
Peng, Ching-Wei
;
Yeh, Chien-Hung
Radio-over-fiber (ROF)-based mobile fronthaul network supporting the baseband unit and simple remote radio head is a promising network architecture for future wireless networks. In this paper, we propose and demonstrate a silicon photonics (SiPh)-based remote radio frontend (RRF) for the mm-wave ROF systems. The proposed SiPh-based RRF consisted of an integrated Mach-Zehnder modulator and a micro-ring modulator, producing a single-sideband 40 GHz millimeter-wave orthogonal-frequency-division-multiplexing ROF signal, which is robust against fiber chromatic dispersion in the mobile fronthaul transmission. The RRF is fabricated using SiPh platform and could be potentially low cost. High split-ratios can be potentially achieved. Data rate of 7.813 Gbit/s per wavelength channel is achieved in the experiment. Numerical analysis is also performed; there are good matches of the simulation and experimental results.
Mode-Division-Multiplexing (MDM) of 9.4-Tbit/s OFDM Signals on Silicon-on-Insulator (SOI) Platform
(2019-01-01)
Chen, Guan-Hong
;
Chow, Chi-Wai
;
Yeh, Chien-Hung
;
Peng, Ching-Wei
;
Guo, Pin-Cheng
Silicon photonic (SiPh) technology applied for optical communication systems and network-on-chips have attracted many attentions. We propose and demonstrate the use of a 4 x 4 mode-division-multiplexing (MDM) - multiplexer (MUX) and demultiplexer (DEMUX) to provide 200-Gbit/s orthogonal-frequency-division-multiplexing (OFDM) per wavelength signal transmission. The MDM MUX and DEMUX are implemented by asymmetric directional couplers (ADCs), which are constructed by an access waveguide for the transmission of fundamental mode; and the bus waveguide for the transmission of higher order modes. When phase matching condition is satisfied between the access waveguide and bus waveguide, mode conversion can be achieved. Here, 47 wavelengths are successfully mode multiplexed and de-multiplexed achieving a total transmission capacity 9.4 Tbit/s. Numerically study and analysis of the SiPh MDM MUX/DEMUX are presented, and the experimental evaluations are performed.
Silicon-on-Insulator (SOI) based Polarization-Exchanger using Asymmetric Directional Coupler
(2018-01-01)
Peng, Ching-Wei
;
Chang, Yuan-Chia
;
Cheng, Ming-Wei
;
Hsu, Yung
;
Wei, Liang-Yu
We propose an silicon-on-insulator (SOI) based polarization-exchanger using bi-level-tapers and asymmetric-directional-couplers. Signal from transverse-electric (TE) polarization can be switched to transverse-magnetic (TM) polarization and vice versa. Crosstalk <= -25dB is observed in 40nm wavelength window.