DUSSARDIER , Bernard

Seminar, by invitation from Prof. C.K Jayasankar ( Sri Venkateswara University, Tirupati, AP, India. )

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The high transparency of optical fibres is one of the key parameters that allowed for the success of optical telecommunication systems. Their development has changed our lives in many ways ; however none of these would operate without components based on custom-tailored optical fibres. Besides telecommunications, many other fields of...

International audience

Recueil JNOG 34

Because this symposium is also organized to mark the establishment of Optics and Photonics at IIT-Delhi, this talk will aim at paying a tribute to the collaboration between our two institutes in the field of fiber optics, and evoque recent and present investigations carried out in our institute, which are the consequences of this fruitful collaboration.

We review on some studies of the potential of new dopants in silica fibers for ultrabroadband amplification coverage in the 800-1700 nm range, including transition metal and rare-earth ions, and sensitized nano-particles.

L'évolution des recherches en optique guidée depuis la naissance de cette spécialité a toujours été intimement liée aux progrès effectués sur les matériaux. Au début, il s'est agit d'obtenir des matériaux les plus purs possibles afin d'éviter les phénomènes néfastes d'absorption et de diffusion de l'onde lumineuse dans le milieu. En 1969,...

We review our recent progress in the characterization of the embedding of rare-earth elements in nanometer-scale particles or phase-separated glassy regions within the core of silica-based optical fibres, and discuss future directions.

Optical fibers are the basis for applications that have grown considerably in recent years (telecommunications, sensors, fiber lasers, etc). Despite undeniable successes, it is necessary to develop new generations of amplifying optical fibers that will overcome some limitations typical of silica glass. In this sense, the amplifying Transparent...

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Pour le développement de nouvelles applications, des fibres optiques amplificatrices à base de silice et à cœur vitro-céramique sont envisagées suivant un procédé de fabrication standard. Ces fibres conservent les avantages mécaniques et optiques de la silice tout en insérant les ions luminescents (terres rares, métaux de transition) dans des...

Le conférencier présentera les principaux points suivants :* état de l'art des fibres optiques dopées terre rare, notamment identification de certaines limitations * influence du matériau et du procédé de synthèse sur les propriétés d'amplification des terres rares et métaux de transition* principes des vitrocéramiques transparentes (synthèse,...

In rare-earth-doped silica optical fibres, the homogeneous distribution of amplifying ions and part of their spectroscopic properties are usually improved by adding selected elements, such as phosphorus or aluminum, as structural modifier. In erbium ion (Er3+) doped fibres, phosphorus preferentially coordinates to Er3+ ions to form regular...

The chapter is situated in the fields of fiber materials sciences and technologies ( particularly dealing with the fiber glass compositions and luminescent ion doping, and transparent glass ceramic optical fibers), and applications such as fiber lasers and amplifiers. We propose to present a review of research activities on rare-earth (RE) and...

The development of new active optical fibre devices requires materials with " augmented " intrinsic properties, though using luminescent ion (LI) -doped silica as host glass. Optical fibers containing Dielectric Nanoparticles (DNP) grown by phase separation are proposed. DNP would optimally fully encapsulate LI to produce " engineered "...

Developing new rare-earth ion-doped optical fibres for power amplifiers and lasers requires continuous improvements in fibre spectroscopic properties. To overcome some limitations inherent to silica glass, it is proposed to embed rare-earth ions in dielectric nanoparticles. In this article we focus on the modifications of the Er3+ ion...

In this presentation we would discuss design and fabrication issues with regard to dispersion tailoring of optical fibers for specialty applications. Various design tools, which could be exploited for such purpose, would be discussed.

A chromium-doped saturable absorber fiber stabilizes an otherwise spontaneously chaotically self-pulsing ytterbium-doped fiber laser . This original passively Q-switched all-fiber laser produces sustained and relatively stable trains of smooth pulses at high repetition rate.

We present some of our research activities dedicated to doped silica-based optical fibers, aiming at understanding the spectral properties of luminescent ions, such as rare-earth and transition metal elements. The influence of the local environment on dopants is extensively studied: energy transfer mechanisms between rare-earth ions, control of...

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Developing of new rare-earth (RE)-doped optical fibres for power amplifiers and lasers requires continuous improvements in the fibre spectroscopic properties (like shape and width of the gain curve, optical quantum efficiency, resistance to spectral hole burning and photodarkening...). Silica glass as a host material for fibres has proved to be...

Erbium doped materials are of great interest in optical telecommunications due to the Er3+ intra-4f emission at 1.54 μm. Erbium doped fibre amplifiers (EDFA) were developed in silica glass because of the low losses at this wavelength and the reliability of this glass. Developments of new rare earth doped fibre amplifiers aim to control their...

A spontaneously chaotic, self-pulsing ytterbium-doped fibre laser is partially stabilized into the passively Q-switched mode of operation using a chromium-doped saturable absorber fibre. This original all-fibre laser produces sustained and stable trains of smooth pulses at high repetition rate.