Optical Amplifiers are essentials components in long haul fibre optic system. An amplifier is a electronic device that can increase the power of signal. An Optical Amplifier is effectively the opposite of attenuator while Optical Amplifiers provide gain and attenuator provides loss. When a signal travels in a optical fibre medium the signal suffer from various losses such as fibre losses, atten...

H.: 'Overall theory 01 the erbiumdoped fibre amplifier', submitted for publication to IEEE J. Lightwave Technol., Special Issue on Optical Amplifiers 10 MARCEROU, J . F., FEVRIER, H., AUGE, I., and BOUSSELET, P . . 'A general theoretical approach describing the complete behavior of the erbium-doped fibre amplifier', to appear in SPIE Proc. vol. 1373, accepted paper 18 lo SPIE'90, San Jose (1990)

C. Michel, S. Tascu, V. Doya, O. Legrand, F. Mortessagne In this paper, we present a non-standard fibre amplifier specially designed to amplify scar modes of a multimode chaotic optical fibre. More precisely, we introduce Ytterbium in the optical fibre as a gain medium localised on the maximum of intensity of the scar modes. After briefly recalling the relevance of a chaotic optical fibre as a ...

In this paper, we present a non-standard fibre amplifier specially designed to amplify scar modes of a multimode chaotic optical fibre. More precisely, we introduce Ytterbium in the optical fibre as a gain medium localised on the maximum of intensity of the scar modes. After briefly recalling the relevance of a chaotic optical fibre as a device to visualise quantum chaos, we describe the amplif...

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 ...

In the present work, gain of EDFA (Erbium Doped Fibre Amplifier) and YDFA (Ytterbium Doped Fibre Amplifier) are analyzed based on their performance parameters. The effects of pump laser power, length of doped fibre that used for amplification and the wavelength of the input signal on the gains of the optical amplifiers is examined. EDFA exhibits maximum gain of 48db around 1550nm regions with p...

We present a co-axial dual-core resonant leaky optical fibre design, in which the outer core is made highly leaky. A suitable choice of parameters can enable us to resonantly couple power from the inner core to the outer core. In a large-core fibre, such a resonant coupling can considerably increase the differential leakage loss between the fundamental and the higher order modes and can result ...

BURRUS, c. A., YOUNG, M. G., ORON, M., and KILLER, B. I.: ‘Balanced operation of a GaInAs/GaInAsP multiple-quantum-well integrated heterodyne receiver’, Photonics Technol. Lett., 1990, 2, pp. 577-580 OKOSHI, I. : ‘Exact noise-figure formulas for optical amplifiers and amplifier-fibre cascaded chains’. OAA ’90, Monterey, Aug. 1990, No. PDP-11 RW, s., and HORIUCHI, Y.: ‘Use of an optical amplifie...

Fibre Raman amplifiers are being deployed in many new long-haul and ultra long-haul fibre-optic transmission systems, making them the first and most widely commercialized nonlinear optical devices in telecommunications. One of the main reasons for this is their improved noise figure and reduced nonlinear penalty of fibre systems hence allowing for longer amplifier spans. In this paper, we have ...