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首页> 美国卫生研究院文献>International Scholarly Research Notices >350 nm Broadband Supercontinuum Generation Using Dispersion Engineered Near Zero Ultraflat Square-Lattice PCF around 1.55 μm and Fabrication Tolerance Analysis
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350 nm Broadband Supercontinuum Generation Using Dispersion Engineered Near Zero Ultraflat Square-Lattice PCF around 1.55 μm and Fabrication Tolerance Analysis

机译：使用约1.55μm的色散工程近零超扁平方阵PCF产生350 nm宽带超连续谱并进行制造公差分析

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摘要

In this work, a new design of ultraflat dispersion PCF based on square-lattice geometry with all uniform air holes towards broadband smooth SCG around the C-band of wavelength has been presented. The air hole of the inner ring was infiltrated with liquid of certain refractive indices. Numerical investigations establish a near zero ultraflattened dispersion of 0 ± 0.78 psm/km in a wavelength range of 1496 nm to 2174 nm (678 nm bandwidth) covering most of the communications bands with the first zero dispersion wavelength around 1.54 μm. With the optimized ultraflattened fiber, we have achieved a broadband SC spectrum with FWHM of 350 nm with the central wavelength of 1550 nm with less than a meter long of the fiber by using a picosecond pulse laser. We have also analyzed the sensitivity of the optimized dispersion design by small variations from the optimum value of the geometrical structural parameters. Our investigations establish that for a negative change of PCF parameters, the profile retains the smooth and flat SCG spectra; however, for a positive change, the smooth and a flat spectrum is lost. The new design of the fiber will be capable of covering huge diverse field of DWDM sources, spectroscopy, meteorology, optical coherence tomography, and optical sensing.
机译：在这项工作中，已经提出了一种新的超扁平色散PCF设计，该设计基于方形晶格几何结构，所有均匀气孔朝向波长C波段附近的宽带平滑SCG。内圈的气孔渗入了某些折射率的液体。数值研究在1496±nm至2174 nm（678 nm带宽）的波长范围内建立了0±0.78 ps / nm / km的接近零的超平坦色散，覆盖了大多数通信频段，第一个零色散波长约为1.54μm。通过优化的超扁平光纤，我们通过使用皮秒脉冲激光器，获得了FWHM为350 nm，中心波长为1550 nm且带宽不到一米长的宽带SC光谱。我们还通过与几何结构参数的最佳值进行了很小的变化来分析了优化的色散设计的灵敏度。我们的研究表明，对于PCF参数的负变化，轮廓保留了平滑平坦的SCG光谱；但是，对于积极的变化，将失去平滑和平坦的频谱。光纤的新设计将能够覆盖DWDM光源，光谱学，气象学，光学相干断层扫描和光学传感的巨大领域。

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