Introduction: Orthogonal frequency division multiplexing (OFDM) has been extensively investigated to combat RF microwave multipath fading, and has been widely implemented in various digital communication standards such as wireless local area network standards (WIFI IEEE 802.11a) [1]. In this Letter, we propose an optical equivalent of the RF OFDM called coherent optical OFDM (CO-OFDM) to combat...

Studies reveal that there exists much interaction and communication between bacterial cells, with parts of these social behaviors depending on cell-cell contacts. The cell-cell contact has proved to be crucial for determining various biochemical processes. However, for cell culture with relatively low cell concentration, it is difficult to precisely control and retain the contact of a small gro...

We present high speed real time, error free 4-PAM transmission for short range optical links based on a VCSEL operating at 850 nm, a multimode fibre and a simple intensity detector. Transmission speeds of 25 Gbps and 30 Gbps are demonstrated, and the maximum fibre reaches were 300 m and 200 m, respectively. The 4-PAM is also compared with OOK transmission at 25 Gbps, and we find that at this bi...

In the previous 20 years, wavelength conversion has received a considerable attention due to its strong influence on the blocking performance of wavelength-routed WDM networks. In a wavelength-routed WDM network, end users communicate with one another via all-optical WDM channels. In all-optical WDM channels optical fibre is used. Optical fibre is a single, hair-fine filament drawn from molten ...

Kerr nonlinearity imposes a limit on the achievable transmission performance and capacity of optical fibre communication links. We show that the nonlinear distortions of a pair of phase-conjugated twin waves are essentially anticorrelated, so cancellation of signal-to-signal nonlinear interactions can be achieved by coherently superimposing the twin waves at the end of the transmission line. We...

A review of passive components based on optical microfibers is presented. KeywordsOptical fibre tapers; optical microfibers, fibre devices, optical fibre nanowires

Optical communication networks are an excellent option to establish backbone or transport networks due to the high-bandwidth provided by the optical fibres. In this kind of networks the information is transmitted through optical fibres in the infrared domain. Although fibres provide high bandwidth for the transmission of information (around 50 THz), the current electronic technology cannot work...

Fibre materials span a broad range of applications ranging from simple textile yarns to complex modern fibre-optic communication systems. Throughout their history, a key premise has remained essentially unchanged: fibres are static devices, incapable of controllably changing their properties over a wide range of frequencies. A number of approaches to realizing time-dependent variations in fibre...