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Galle M.A.,Kings College | Saini S.S.,University of Waterloo | Mohammed W.S.,Bangkok University | Sillard P.,Prysmian Group | Qian L.,Kings College
Optics Express | Year: 2014

We present the simultaneous measurement of first and second order dispersion in short length (<1m) few mode fibers (polarization and transverse) using virtual reference interferometry. This techique generates results equivalent to balanced spectral interferometry, without the complexity associated with physical balancing. This is achieved by simulating a virtual reference with a group delay equal to that of the physical interferometer. The amplitude modulation that results from mixing the interferograms, generated in both the unbalanced interferometer and the virtual reference, is equivalent to the first order interference that would be produced by physical balancing. The advantages of the technique include speed, simplicity, convenience and the capability for simultaneous measurement of multiple modes. The theoretical framework is first developed and then verified experimentally. © 2014 Optical Society of America. Source


Gabet R.,Telecom ParisTech | Le Cren E.,French National Center for Scientific Research | Jin C.,Laval University | Gadonna M.,French National Center for Scientific Research | And 7 more authors.
Journal of Lightwave Technology | Year: 2015

Few-mode optical fibers (FMFs) are useful for many applications such as space-division-multiplexing (SDM), high laser power generation and transport, dispersion compensation, etc. The emergence of SDM induces considerable requirements in terms of FMF characterization (chromatic dispersion, birefringence, modal content, bending losses). All LP modes of an FMF can be simultaneously characterized using phase-sensitive optical low-coherence interferometry. The differential modal group delay and absolute chromatic dispersion values of each mode are retrieved from a single measurement without spatial mode transformers. © 2015 IEEE. Source


Sillard P.,Prysmian Group
2014 IEEE Photonics Conference, IPC 2014 | Year: 2014

We investigate the impact of the increase of the number of LP modes supported by few-mode fibers on their main characteristics, pointing out the limiting factors of this increase. © 2014 IEEE. Source


Travagnin M.,Prysmian Group | Travagnin M.,Polytechnic University of Turin
Journal of Lightwave Technology | Year: 2013

We measure the coherent multipath interference noise and the associated bit error rate (BER) penalty affecting an optical link in which a fraction of the signal is scattered from the fundamental into the first-order mode of a bend insensitive fiber, to mimic a situation that can be encountered in fiber to the home deployments. Our set up allows changing the relative weights and the phase difference between the two interfering modes, and measuring the BER in stationary and dynamical settings, namely with the interference conditions kept fixed or continuously varied during the measurement cycle, respectively. We show that the BER penalty detected in the dynamical measurements can be entirely ascribed to the stochastic variations of the received intensity, and we demonstrate a good agreement between the experimental data and the results of our numerical simulations. © 1983-2012 IEEE. Source


Sillard P.,Prysmian Group
Journal of Lightwave Technology | Year: 2015

This paper reviews the most recent advances on next-generation fibers for space-division-multiplexed transmissions. These fibers can be classified into different categories, depending on the way the inherent crosstalk issue is addressed, and have thus different characteristics and limitations. Comparisons of their performances and insights in their different potentials are also provided. © 2015 IEEE. Source

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