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11 May 2011Electromagnetic analysis and characterization of photonic crystal fibers with slit-like geometry
We propose a rigorous electromagnetic analysis for a Photonic Crystal Fiber (PCF) geometry consisting of
multiple hollow slits that go across the fiber core along the propagation axis z. The slits are regarded as
invariant along the transverse dimension x but exhibit multiple sinusoidal bends in the y-z plane, which prevents
the transversal profile being constant along the z axis. To analyze and characterize the electromagnetic behavior
of the considered PCF geometry, we use a 2D Finite-Difference Time-Domain (FDTD) scheme assuming an
ultrashort incident pulse with a polarization angle of 45 degrees as the excitation source. Our analysis focuses
on three key aspects for the ultrashort pulse propagation through the slit array: pulse shaping and delay,
spatiotemporal dispersion and birefringence features. Numerical FDTD simulations illustrate the effect of the slit array parameters on the previous magnitudes. Our results demonstrate that the proposed structure provides with a wide and deep control over the pulse propagation and wavefront.
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Manuel Pérez-Molina, Jorge Frances, Sergi Gallego, Manuel Ortuño, Augusto Beléndez, "Electromagnetic analysis and characterization of photonic crystal fibers with slit-like geometry," Proc. SPIE 8073, Optical Sensors 2011; and Photonic Crystal Fibers V, 80732O (11 May 2011); https://doi.org/10.1117/12.887074