Design of photonic crystal fibers for dispersion-related applications

Design of supercontinuum generating photonic crystal fiber at 1.06, 1.31 and 1.55 µm wavelengths for medical imaging and optical transmission systems

“…The full-vector finite difference method (FDM) [17,18] with anisotropic perfectly matched boundary layers (PMLs) is used to calculate the different properties of PCFs. Anisotropic PMLs absorbing boundary are positioned outside the outermost ring of air holes in order to reduce the simulation window and to evaluate the confinement loss of the proposed fiber with a finite number of air hole rings.…”

“…The material dispersion given by Sellmeier equation is directly included in the calculation. Therefore, chromatic dispersion in References [17,18] corresponds to the total dispersion of the PCFs. Chromatic dispersion is an important phenomenon in the propagation of short pulses in optical fibers.…”

“…The different spectral components of the pulse travel through the medium at slightly different group velocities because of chromatic dispersion, which can result in a temporal broadening of the light pulses with no effect on their spectral compositions. Once the modal effective indices is obtained by solving an eigenvalue problem drawn from the Maxwell's equations using the FDM, the parameter chromatic dispersion, confinement loss and effective area can be calculated by [17,18] …”

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“…have complex structures, so Scalar effective index method (SEIM) and fully-vectorial effective index method (FVEIM), which both successfully describe the single-mode behavior of PCFs, can be used. [16][17][18] By comparing the reported results obtained from SEIM and FVEIM, it was revealed that in shorter wavelengths, these two methods are relatively compatible, but in longer wavelengths FVEIM method is more suitable. Also, increasing value of the ratio / d Λ would reduce the accuracy of the SEIM.…”

Suppression of Raman soliton self-frequency shift in photonic crystal fibers with tellurite subwavelength core

“…[1][2][3][4][5][6] Several nonlinear effects, including self-phase modulation (SPM), Raman-stimulated Raman scattering, Raman soliton self-frequency shift (RSSFS), soliton fission, and the dispersive wave in PCFs have been deeply studied for applications in laser sources of different wavebands. [1][2][3][4][5][6] Several nonlinear effects, including self-phase modulation (SPM), Raman-stimulated Raman scattering, Raman soliton self-frequency shift (RSSFS), soliton fission, and the dispersive wave in PCFs have been deeply studied for applications in laser sources of different wavebands.…”