Zobrazeno 1 - 10
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pro vyhledávání: '"J.M. Fini"'
Autor:
J.M. Fini
Publikováno v:
Journal of Lightwave Technology. 24:3155-3161
Group velocity matching is a key to the performance of multimode microstructure fibers. Simulations show that only partial matching is achieved using an intuitive graded-hole strategy, but that the usual velocity-matching limit can be achieved by num
Publikováno v:
Journal of Lightwave Technology. 21:982-989
A real-time estimation technique for first- and second-order polarization-mode dispersion (PMD) is presented. It makes use of the spectrum of telecommunication signals. At the output of the transmission fiber, the signal is tapped and filtered. Three
Publikováno v:
IEEE Photonics Technology Letters. 14:161-163
We demonstrate a feed-forward technique, which characterizes first-order polarization-mode dispersion (PMD) and aligns it to a compensator. With appropriate components, the system could perform real-time compensation of first-order PMD with rapidly v
Publikováno v:
IEEE Photonics Technology Letters. 13:568-570
Most polarization-mode dispersion (PMD) compensation systems rely on many feedback parameters that contribute to complexity, instability, and speed limitations. We demonstrate a method that quickly and accurately determines the principal states of po
Publikováno v:
IEEE Photonics Technology Letters. 13:124-126
First-order compensation of polarization-mode dispersion (PMD) leaves residual, higher order PMD. We analyze the accumulation of residual distortion in cascades of compensated fibers. Total distortion is calculated and limitations on the total propag
Autor:
J.M. Fini
Publikováno v:
OECC/ACOFT 2008 - Joint Conference of the Opto-Electronics and Communications Conference and the Australian Conference on Optical Fibre Technology.
As ever larger mode area fibers are designed and incorporated into high-power amplifiers, bend-induced mode distortion becomes an important limitation. In any reasonable coiled-fiber arrangement, bend distortion can reduce mode area, gain interaction
Autor:
J.W. Nicholson, R. Bise, J. Alonzo, T. Stockert, D.J. Trevor, F. Dimarcello, E. Monberg, J.M. Fini, P.S. Westbrook, K. Feder, L. Gruner-Nielsen
Publikováno v:
OFC/NFOEC 2008 - 2008 Conference on Optical Fiber Communication/National Fiber Optic Engineers Conference.
Visible supercontinuum in the fundamental mode is generated in a silica hybrid nonlinear fiber using a femtosecond, erbium-doped fiber laser pump. The nonlinear fiber consists of highly nonlinear, germano-silicate fiber (HNLF) fusion spliced to a pho
Autor:
S. Ramachandran, J.M. Fini
Publikováno v:
Scopus-Elsevier
Signal amplification in higher order modes with large mode area has been proposed to overcome power limitations in fiber amplifiers. Simulations and measurements demonstrate resistance of these modes to bend-induced distortion and coupling, respectiv
Autor:
J.M. Fini
Publikováno v:
2007 Conference on Lasers and Electro-Optics (CLEO).
Fibers with very large mode area see degraded gain competition when bent for spooled-fiber operation. Simulations demonstrate that recently proposed bend-distortion-resistant designs are immune to gain degradation, as well as effective area reduction
Autor:
J.M. Fini, S. Ramachandran
Publikováno v:
Scopus-Elsevier
Higher-order-mode fibers with very large mode area are shown to be naturally resistant to bend induced mode distortion, an important limitation on amplifier fibers. Simulations and measurements display resistance of these fibers to bending.