- 标题
- 摘要
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- 实验方案
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A novel star shape photonic crystal fiber for low loss terahertz pulse propagation
摘要： An extremely low loss circle-based star shape photonic crystal fiber (CS-PCF) has been proposed for terahertz (THz) spectrum. A dielectric material TOPAS has been used for constructing the proposed model. Some important parameters for the proposed waveguide have been investigated a wide THz spectrum ranging from 0.5 to 2.50 THz. The simulation result exhibits an extremely-low material loss of 0.01607 cm-1 and a large effective area of 1.386 × 106 μm2 at 1.0 THz frequency with 55% core porosity. In addition, the proposed structure establishes comparatively higher core power fraction maintaining lower scattering loss about 1.235 × 10-15 dB/cm and 91.97% of bulk absorption material loss at the same operating frequency. From the above results, it is anticipated that proposed CS-PCF model of the THz waveguide will make the conventional communication very effective over the current designs.
关键词： Effective material Loss,Scattering Loss,Power Fraction,THz Application,Single Mode Fiber
更新于2025-09-23 15:21:01
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Low-Loss and Dispersion-Flattened Octagonal Porous Core PCF for Terahertz Transmission Applications
摘要： In order to make the direct transmission more effective, we have intended an octagonal shape cladding design in this paper. The minimum resultant effective material loss obtained from our proposed photonic crystal fiber is 0.007 cm-1 at 0.5 THz is very effective. The proposed design gives an ultra-high birefringence of 0.06 with an effective area of about 4 9 10-6 m2, a core power fraction of 70% for 290 lm core diameter with a core porosity of 80% at 1.6 THz frequency and closely zero flattened dispersion of variation of 0.3 ± 0.1 ps/THz/cm at a wide frequency range of 0.7–2.1 THz.
关键词： Terahertz,Core porosity,Effective material loss,Octagonal core,Confinement loss,Dispersion
更新于2025-09-23 15:19:57
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Extremely low loss optical waveguide for terahertz pulse guidance
摘要： This study proposed a dielectric terahertz (THz) D-shape core based photonic crystal fiber (PCF) with very low level of effective material loss (EML) for efficient THz pulse propagation. The modal parameters of the proposed fiber have been rigorously computed using finite element method (FEM) by considering the absorption boundary condition (ABC) using perfectly matched layer (PML). Investigation results of the fiber exhibit a low material absorption loss of 0.027 cm-1 and zero flatted dispersion within the 0.85–1.25 THz range. Additionally, large number of crucial features of the fiber have been evaluated. It reduces the bulk absorption loss of ~87% at the same time offers single mode operation. The proposed fiber can be easily fabricated by using stack and draw or sol-gel technique. Due to excellent optical guiding properties, it can be a potential prospect in THz sensing, communication and imaging applications.
关键词： Low effective material loss,Zero flatted dispersion,D shape PCF,Bulk absorption loss,Terahertz waveguide
更新于2025-09-12 10:27:22
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Design and analysis of a Zeonex based diamond-shaped core kagome lattice photonic crystal fiber for T-ray wave transmission
摘要： A new kind of Zeonex based single mode photonic crystal fiber (PCF) has been designed and analysed for low loss terahertz wave transmission. The novel twist is introduced in a kagome lattice PCF by placing a diamond shaped core. Various geometrical parameters including core diameter, pitch distance, porosity, strut length and strut width are adjusted to optimize the PCF. Using Finite Element Method (FEM) simulation results show a low effective material loss (EML) of 0.04 cm?1 that is 80% lower than bulk material absorption loss of Zeonex, low confinement loss of 0.0001 cm?1 at 1 THz frequency and near zero flattened dispersion variation of 0.98 ± 0.09 ps/THz/cm with 1 THz transmission bandwidth. Owing to the above remarkable properties, the proposed waveguide can be a suitable candidate for improved transmission of terahertz waves.
关键词： Waveguide,Photonic crystal fiber,Dispersion,Terahertz,Effective material loss
更新于2025-09-09 09:28:46
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Design and Characterization of an Ultra Low Loss, Dispersion-Flattened Slotted Photonic Crystal Fiber for Terahertz Application
摘要： A novel photonic crystal fiber (PCF) based on TOPAS, consisting only rectangular slots is presented and analyzed in this paper. The PCF promises not only an extremely low effective material loss (EML) but also a flattened dispersion over a broad frequency range. The modal characteristics of the proposed fiber have been thoroughly investigated using finite element method. The fiber confirms a low EML of 0.009 to 0.01 cm?1 in the frequency range of 0.77–1.05 THz and a flattened dispersion of 0.22 ± 0.01 ps/THz/cm. Besides, some other significant characteristics like birefringence, single mode operation and confinement loss have also been inspected. The simplicity of the fiber makes it easily realizable using the existing fabrication technologies. Thus it is anticipated that the new fiber has the potential to ensure polarization preserving transmission of terahertz signals and to serve as an efficient medium in the terahertz frequency range.
关键词： dispersion,micro-structured fibers,terahertz,photonic crystal fibers,effective material loss
更新于2025-09-09 09:28:46
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Design and numerical analysis of highly birefringent single mode fiber in THz regime
摘要： A novel kind of porous core microstructure optical fiber is proposed in this paper. In order to create flexibility of the fiber only ring air hole is used for the cladding region. Finite Element Method (FEM) based Comsol v4.2 software is used to investigate the guiding characteristics of the proposed fiber. The optimum design parameter shows an ultrahigh birefringence of 0.051, low effective material loss of 0.07 cm?1 and low bending loss of 1.13 × 10?13 dB/cm at 1.2 THz. Moreover, the proposed fiber offers very low dispersion of 1.2 ± 0.32 ps/THz/cm over a wide range of frequency from 1.1 THz to 1.9 THz. Other important guiding characteristics such as confinement loss, effective area and single mode propagation are also discussed in detail. This structure may be a good choice in different remarkable terahertz applications.
关键词： Dispersion,Birefringence,Terahertz waveguide,Effective material loss
更新于2025-09-04 15:30:14