We present the broad and ultra-flat optical parametric gain in the highly nonlinear tellurite fibers with tailored chromatic dispersion. The effect of pump wavelengths and powers on dual-pump configuration of four-wave mixing (FWM) are investigated. It is clarified that an ultra-flat gain bandwidth with 658 nm and ±0.01 dB fluctuation can be achieved at the dual-pumping power of 1.25 W. Moreover, a gain bandwidth with 1524 nm and 60 dB signal gain with gain ripples can be obtained at the dual-pumping power of 3.0 W in 25 cm-long hybrid tellurite microstructured optical fiber.
We present here, the extensive study of broadband and high parametric gain in highly nonlinear tellurite optical fiber.
The chromatic dispersion has been designed to achieve broad gain bandwidth and phase-matching over broad spectral
range. The optical parametric gain under pulse repetition rate dependence and with no influence of group velocity gain
spectrum has been calculated for different fiber lengths. When the parametric gain was calculated, with dependence on
group velocity and repetition rate of pulse, the gain bandwidth was found to be shrinking abruptly due to lessening of
pump power. The pulse repetition rate was assumed to be 20 GHz, with fiber core diameter of 0.895 μm and calculated
nonlinearity coefficient γ was 6642 W-1km-1. The study has been extended to realize the impact of pump power variation over supercontinuum generation with fiber length of 75 cm.
We present here the broadband and parametric gain for tellurite/phospho-tellurite optical fiber by carefully engineering the chromatic dispersion for optical parametric amplifier. This optical parametric amplification with broad bandwidth promises significant solutions for wavelength division multiplexing (WDM) and advanced ultrafast optical telecommunication systems. The parametric gain has been obtained with inclusion of higher and even order dispersion parameters in phase-mismatching factor (Δβ). The results have been obtained for step index fiber (SI) and hybrid microstructured optical fiber (HMOF) with engineered chromatic dispersion, having one zero dispersion wavelength (ZDW) and two ZDWs. The HMOF with a core diameter of 1.1 μm and chromatic dispersions having two ZDWs at 1262 and 1559 nm provides broadest parametric gain bandwidth (280 nm). This broad bandwidth advents due to the high nonlinear coefficient of tellurite/phospho-tellurite hybrid microstructured optical fiber. The paper explores variation in dispersion parameters, supercontinuum spectra and bandwidth of the parametric gains for these fibers.
The hybrid microstructured optical fibers (HMOFs) are emerging due to their capability of tailoring the dispersion. The chromatic dispersion and other related optical properties, such as optical mode confinement and effective index, have been calculated using the finite element method. We have realized four zero dispersion wavelengths (ZDWs) of 1566, 1605, 1726 and 1790 nm. The signal and idler wavelength dependent on pump wavelength is calculated. The gain bandwidth is 134 nm for the pump wavelength of 1761 nm between third and fourth ZDW. The supercontinuum generation is studied for the pump wavelength 1761 nm.
The microstructured optical fibers have been considered in this paper due to their unique nonlinear properties.
These optical fibers have enormous potential and they are also unrestraint to tailor the design for obtaining promising
dispersion properties. It has been observed that conversion efficiency significantly increases when nonlinear contribution
to propagation constant is considered for phase matching. The phase matching have been obtained for even and higher
order dispersion with the optical pump pulse conditions. The coupled mode theory along with nonlinear Schrödinger
equation has been used to reveal the optical properties of telluride/phospho-tellurite hybrid microstructured optical fiber.
The paper has been focused to investigate the effective index, pulse propagation intensity and quasi phase matching.
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