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Proposed is a broad supercontinuum spectrum generated highly nonlinear photonic crystal fibre which can be used in ultra-high-resolution optical coherence tomography and optical transmission systems. Investigation showed that it is possible to obtain longitudinal resolution in a biological tissue of 1.3, 1.2, and 1.1 m by using picosecond continuum light at centre wavelengths 1.06, 1.31, and 1.55...
Using finite difference method, we demonstrated the nonlinear coefficients more than 72 and 60 [Wkm]-1 at 1.0 mum and 1.3 mum, respectively with flattened dispersion of 0 + 2.7 ps/(nm.km) and low confinement losses.
Novel silica index guiding holey fibers (IGHFs) design are proposed utilizing a new defect structure that is composed of defected innermost structures. The proposed IGHFs exhibits remarkable chromatic dispersion properties such as nearly zero and flattened dispersion over a wide spectral range and single mode guidance along with low confinement loss. Its numerical results point out 5 air-holes rings...
We propose a novel PCF with Ge-rods at the center core. The authors designed a single mode PCF with large Aeff > 200 mum2 over the wavelength above 1.2 mum and exhibits high negative dispersions (-186 to -158 [ps/(nm-km)]).
We report that it is possible to control chromatic dispersion of photonic crystal fibers in wide wavelength range by using elliptical air-holes located at core disposed perpendicular alternately. Using this arrangement, a newly PCFs with ultra-low and ultra-flattened dispersion are designed with flattened dispersion of 0.23 [ps/km-nm] from 1.5 mum to 1.8 mum wavelength with the confinement loss less...
This paper describes dispersion tolerance of an octagonal photonic crystal fiber (O-PCF) due to variations in the dimension of first ring's air-hole diameter. It is demonstrated that an O-PCF can assume promising tolerance with ultra-flattened dispersion of 0 plusmn 0.69 ps/(nm-km) in a 1.31 to 1.70 mum wavelength range.
We propose a novel type of PCF that has two cladding layers with Ge-doped rods at the inner cladding. It is possible to design a single mode PCF with both large effective area greater than 200 mum2 above 1.2 mum wavelength and ultra-low splicing loss of ~0.0 dB per fusion-splicing.
This paper presents a polarization maintaining modified hexagonal photonic crystal fiber (M-HPCF) with nearly zero ultra-flattened dispersion of 0plusmn0.35 ps/(nm-km) in the wavelength range between 1.397 mum and 1.675 mum, possessing extremely low confinement losses and birefringence of about 7.5times10-4 at lambda=1.55 mum.
We propose a novel design in PCFs with ultra-flattened dispersion characteristics controllability taking non-uniform air-hole structures in innermost rings. As an example, the proposed PCF with flattened dispersion of plusmn0.27 ps/(kmmiddotnm) from 1.5 mum to 1.8 mum wavelength with confinement losses of less than 10-11 dB/m.
This paper reports a novel design in photonic crystal fiber (PCF) with nearly zero ultra flattened dispersion characteristics. We describe the chromatic dispersion controllability taking non-uniform air hole structures into consideration. Through optimizing non-uniform air hole structures, the ultra flattened zero dispersion PCF can be efficiently designed. We show numerically that the proposed triple...
Decagonal PCFs with extremely low dispersion of 0 plusmn 0.26 ps/(nm-.km) in the wavelength range of 1.40 mum to 1.60 mum with confinement loss less than 10-6 dB/km is presented.
This paper presents dispersion characteristics of a decagonal photonic crystal fiber (D-PCF) for the first time. The finite difference method (FDM) with an anisotropic perfectly matched boundary layer (PML) is used to investigate the chromatic dispersion characteristics. It is shown through numerical simulation results that D-PCFs can be used as a dispersion compensating fiber for their high negative...
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