An important group of nonlinear processes in optical fibre involves the mixing of four waves due to the intensity dependence of the refractive index. It is customary to distinguish between nonlinear effects that require external/pumping waves (cross-phase modulation and parametric processes such as four-wave mixing) and self-action of the propagating optical field (self-phase modulation and mod...

In this paper, a low cost 3x3 coupler Mach-Zehnder interferometric optical fibre vibration sensor is proposed. Unlike traditional Mach-Zehnder interferometer with a strain free reference arm, two parallel optical fibres with different strain transfer sensitivity is adopted. With proper demodulation algorithm, the time rate of change of the strain can be computed from the light signal of the out...

– a network made ‘’for and with the concerned community”, able to come up to the expectations and to fit the new plans. A total mastery in transparency (for its management, the control of development, . . . ) is the garanty for a network serving the community it was made for. – an optic structure in ‘’optical fibre” and DWDM (Dense Wavelength Division Multiplexing), ATM and gigabit protocols, s...

In optical communication systems, fibre nonlinearity is the major obstacle in increasing transmission capacity. Typically, digital signal processing techniques and hardware are used to deal with signals, but speed computational complexity create challenges for such approaches. Highly parallel, ultrafast neural networks using photonic devices have potential ease requirements placed on circuits b...

With the increasing number of fibre access users, P2P file sharing download traffic has gradually become one enormous bandwidth consumptions for network. Localizing could save and reduce latency, but it caused optical line terminal (OLT) overload problems. A cloud-edge collaboration technology (IRS-CECT) based redirection strategy is proposed this problem. OLT assumes role cloud computing centr...

We present an analysis of the long-term stability of fibre-optic transmission properties for fibre optics in astronomy. Data from 6 years of operation of the AAOmega multi-object spectrograph at the Anglo-Australian Telescope are presented. We find no evidence for significant degradation in the bulk transmission properties of the 38-m optical fibre train. Significant losses (≤20 per cent relati...

Future Internet should be able to support a wide range of services containing large amount of multimedia over different network types at a high speed. The future optical networks will therefore be hybrid, composed of different single-mode fibre (SMF), multi-mode fibre (MMF) and free-space optical (FSO) links. In these networks, novel modulation and coding techniques are needed that are capable ...

A dielectric fibre with a refractive index higher than its surrounding region is a form of dielectric waveguide which represents a possible medium for the guided transmission of energy at optical frequencies. The particular type of dielectric-fibre waveguide discussed is one with a circular cross-section. The choice of the mode of propagation for a fibre waveguide used for communication purpose...

We report an experimental study of nonlinear effects, characteristic of mutual optical coupling, in an ultra-short coupling regime observed in a distributed Bragg reflector laser pair fabricated on the same chip. Optical feedback is amplified via a double pass through a common on-chip optical amplifier, which introduces further nonlinear phenomena. Optical coupling has been introduced via back ...

Fibre Bragg gratings (FBGs) are novel components of communication and sensors. The technique commonly employed for production of FBGs involves exposure of photosensitive germanosilicate fibre cores to intense excimer laser radiation through an optical phase mask located in close proximity of the fibre. FBGs were written using this technique in two different fibre samples and their strain and te...