Microstructure core photonic crystal fiber for blue extension of supercontinuum generation
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Abstract:
A photonic crystal fiber (PCF) with nanosize airholes in the core is designed for the blue extension of supercontinuum generation. Simulated results show an improvement of >60 nm comparing common PCF.Keywords:
Supercontinuum
We experimentally investigate a supercontinuum generation in a series of photonic crystal fibers pumped with sub-ns pulses. The fibers are designed to have zero dispersion wavelengths close to 1064 nm, but they differ with respect to the lattice constant and air hole size. We focus on the supercontinuum generation mechanism and on the shape of spectra generated with the use of these photonic crystal fibers. A comprehensive study on the influence of the fiber structural parameters on the supercontinuum outcome indicates how to tailor these parameters for specific application where particular spectral characteristics are desired.
Supercontinuum
Zero-dispersion wavelength
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Numerical simulation of supercontinuum generation (SCG) in fluoride based Photonic crystal fiber (PCF) is analyzed using the generalized nonlinear Schrodinger equation and split step Fourier method. Fluoride PCF gives a significant bandwidth enhancement of the SCG as compared to silica based PCF with comparable linear and nonlinear parameters.
Supercontinuum
Nonlinear photonic crystal
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The supercontinuum generation in the three kinds of photonic crystal fiber(PCF) with different dispersion properties is studied by using split-step Fourier algorithm.The influences of pumping wavelength,peak power and the input pulse duration on supercontinuum generation are discussed respectively.The results revealed that the spectrum is the widest in PCF with anomalous dispersion regime,and that is the narrowest in the normal dispersion PCF under the same incident conditions.
Supercontinuum
Zero-dispersion wavelength
Self-phase modulation
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Supercontinuum
Blueshift
Zero-dispersion wavelength
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Supercontinuum
Zero-dispersion wavelength
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We observe the generation of supercontinua from a hollow-core photonic crystal fiber filled with water. The observed supercontinuum spans the spectral range from 410 to 1650 nm and has a high energy of 0.4 µJ.
Supercontinuum
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This paper investigates a supercontinuum generated high power highly nonlinear photonic crystal fiber for medical and optical communication applications. The full vector finite difference method with perfectly matched layer is used as an analysis tool. Numerical simulation results show that it is possible to achieve high nonlinear coefficient, near zero ultra-flattened dispersion, low confinement loss and supercontinuum spectrum with high power. Moreover, numerical results show that short length of the proposed photonic crystal fiber is achieved. The numerical simulation results of supercontinuum generation is conducted by solving the generalized nonlinear Schrödinger equation with the split-step Fourier method. It is observed adequate supercontinuum spectrum that broaden from 960 to 1870 nm by considering center wavelengths of 1.06, 1.31, and 1.55 μm into silica based index guiding photonic crystal fiber. This simulation results prove that the proposed design of a highly nonlinear photonic crystal fiber is a great solution for broad supercontinuum generation with high power.
Supercontinuum
Nonlinear photonic crystal
Zero-dispersion wavelength
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Photonic Crystal Fiber (PCF) has been a topic of extensive research in the field of nonlinear fiber optics. It is due to its combination of linear and nonlinear properties which ultimately results in the phenomenon having various types of applications. One of the phenomena is supercontinuum generation that has been extensively studied numerically and experimentally over the last few decades as it has important applications in the field of medical imaging and sensing. In this paper, we numerically analysed and studied PCF of hexagonal core with various parameters and propose our novel ‘Star in Hexagon’ design as a good candidate for the broadband supercontinuum generation and hence a broadband laser source. We numerically pumped a long 10 mm PCF of this kind at 3.1 um wavelength with a pulse having a power of 4000 W and a temporal width of 50 fs. A broadband supercontinuum ranging from 1.7 um to 18 um was obtained. The generated spectrum is quite well in the mid-infrared region. Hence it can be utilised for Mid – Infrared (MIR) applications.
Supercontinuum
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The fabrication of small-core photonic crystal fibers and preliminary supercontinuum generation characterization are reported. In such non-linear experiments fs pulses from a Ti:Sapphire laser were coupled in the fiber core and the generated spectra recorded.
Supercontinuum
Zero-dispersion wavelength
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We review supercontinuum generation in photonic crystal fiber over the full range of experimentally-reported parameters from the CW to the femtosecond regime. We provide an overview of the underlying spectral broadening mechanisms and associated field and stability properties, and discuss the optimization of supercontinuum sources tailored to particular application needs.
Supercontinuum
Nonlinear photonic crystal
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