This paper considers the closed-loop control of electrically stimulated muscle using simultaneous pulse width and frequency modulation. Previous work has experimentally demonstrated good feedback regulation of muscle force using fixed parameter and an adaptive controller modulating pulse width. In this work, it is shown how the addition of pulse frequency… (More)
This study was conducted with the aim of improving the state of knowledge on the behavior of joints in concrete pavements, and to explore the feasibility of developing a non-destructive testing technique based on the frequency response of dynamically loaded joints. One of the objectives of the present study was to experimentally investigate the existence of… (More)
We show analytically how periodic spinning affects the polarization mode dispersion of a fiber in three different practical regimes that are determined by the values of three length scales: the beat length, the birefringence correlation length, and the spin period. We determine in which limits the spin is effective in reducing the mean differential group… (More)
Single-end measurement of statistical properties of polarization mode dispersion parameters was carried out by means of a continuous wave scheme based on the analysis of the Fresnel reflection at fiber far-end.
A multi-wavelength tuneable OTDR is realized and tested for in-service monitoring of a colourless WDM PON. The instrument regenerates the probe optical pulse by modulating, through an acousto-optic modulator, the continuous wave emission of a tuneable telecommunication laser. This setup reduces at the same time the spontaneous emission noise and the… (More)
Topic This PhD position takes part of the ANR project SIGMOiD that has been submitted to the ANR. The position will be fully funded if the project is accepted. The final answer for the funding will be known in July 2014. The discovery of the orbital angular momentum (OAM) in an electromagnetic (EM) radiation less than a century ago, has drawn the attention… (More)
We compare the different polarization properties of unspun fibers with respect to spun fibers, considering both unidirectional and period spin functions. We consider in particular the consequence in terms of statistical properties as well as correlation length of the signal state of polarization.