We investigate the gain bandwidth and wavelength-tuning range of an erbium-doped fluoride fibre amplifier. The presented experimental setup consisted a widely wavelength-tunable optical parametric oscillator (OPO), which was amplified in single-stage Er-doped OPO laser provided seed pulses with pulse width 5.2 ns repetition rate 10 kHz. section 2.2 m double-clad, single-mode doping concentratio...

medium-size national network is optimised using the various techniques, and the results presented in terms of the total number of DWDM systems required and the amount of wavelength-hops (giving an indication toward the number of optical transponders required). Traffic is taken as a mix between unprotected and 1+1 SNCP optical path protected demands. Traffic growth is applied over the 5 year pla...

1. Introduction The goal of an optical fiber communication system is to transmit the maximum number of bits per second over the maximum possible distance with the fewest errors. A typical digital fiber optic link is depicted in Figure 1. Electrical data signals are converted to optical signals via a modulator. A " 1 " is transmitted as a pulse of light while a " 0 " has no light output. The num...

Optical microelectromechanical systems (MEMS) combine miniature optical components with precision fixtures, elastic suspensions, and microactuators, and allow complex functionality at low cost. However, the effect of the bounded nature of the beams propagating through the system on design is profound. The current paper reviews the fundamental consequences. Using a Gaussian beam formulation, mod...

In this paper different variations of the so-called “Tune-and-Select” (TAS) switching node for Optical Burst Switching (OBS) are investigated. Both signal degradation and burst losses limit the effective throughput of such optical burst switching nodes. These limitations are analysed for different nodes with four input/output fibres at different bit rates. The impact of amplifier noise figure, ...

Optical fibres have already played a huge part in ground based astronomical instrumentation, however, with the revolution in photonics currently taking place new fibre technologies and integrated optical devices are likely to have a profound impact on the way we manipulate light in the future. The Anglo Australian Observatory, along with partners at the Optical Fibre Technology Centre of the Un...

This paper presents a dynamic range boosting technique for wireless optical receivers. This technique changes the feedback impedance of the transimpedance amplifier by the control of multiple parallel transistors in the triode region. This strategy results on a wide controllable gain amplifier, without extra signalto-noise ratio penalties. A front-end with 20MHz bandwidth, maximum transimpedanc...