- 标题
- 摘要
- 关键词
- 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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Investigation for Sidewall Roughness Caused Optical Scattering Loss of Silicon-on-Insulator Waveguides with Confocal Laser Scanning Microscopy
摘要： Sidewall roughness-caused optical loss of waveguides is one of the critical limitations to the proliferation of the silicon photonic integrated circuits in fiber-optic communications and optical interconnects in computers, so it is imperative to investigate the distribution characteristics of sidewall roughness and its impact upon the optical losses. In this article, we investigated the distribution properties of waveguide sidewall roughness (SWR) with the analysis for the three-dimensional (3-D) SWR of dielectric waveguides, and, then the accurate SWR measurements for silicon-on-insulator (SOI) waveguide were carried out with confocal laser scanning microscopy (CLSM). Further, we composed a theoretical/experimental combinative model of the SWR-caused optical propagation loss. Consequently, with the systematic simulations for the characteristics of optical propagation loss of SOI waveguides, the two critical points were found: (i) the sidewall roughness-caused optical loss was synchronously dependent on the correlation length and the waveguide width in addition to the SWR and (ii) the theoretical upper limit of the correlation length was the bottleneck to compressing the roughness-induced optical loss. The simulation results for the optical loss characteristics, including the differences between the TE and TM modes, were in accord with the experimental data published in the literature. The above research outcomes are very sustainable to the selection of coatings before/after the SOI waveguide fabrication.
关键词： optical scattering loss,sidewall roughness,silicon-on-insulator waveguide
更新于2025-09-23 15:19:57
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Low-power optical network-on-chip using low-loss multilayer silicon wire waveguide
摘要： Photonic network-on-chip can benefit the future integrated structures only if it consumes less power. The optical devices used in the network router such as waveguides and switches must be low power to make the overall network power efficient. In this paper, a passive 4 × 4 optical network-on-chip router has been designed employing wavelength-division multiplexing using a novel multilayer silicon wire waveguide. The switching device, serially coupled double-ring resonator for the router, is also based on this waveguide. The designed router is first of its kind that comprises a multilayer silicon photonic wire waveguide and an improvised waveguide-based ring resonator switch. The performance evaluation of designed on-chip optical network router has been carried out in terms of bit error rate (BER). It has been shown that the designed optical network router offers low losses and better BER performance due to its novel low-loss devices and structure. Additionally, the designed network is complementary MOS compatible and non-blocking, i.e., all processing cores can transmit data to each other on all available wavelengths without any conflict.
关键词： Multilayer silicon wire waveguide,Scattering loss,Low-power optical network-on-chip,Serially coupled double-microring resonator
更新于2025-09-16 10:30:52
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Physical implementation of underwater optical wireless system using spatial mode laser sources with optimization of spatial matching components
摘要： This article numerically investigates the e?ect of absorption and scattering loss in the presence of underwater. Presenting optical wireless channel, system is considered for fundamental mode (LP01) and its higher order modes (LP11, LP21 & LP31). The system performance is examined in terms of bit error rate (BER) with the function of wavelength, distance, attenuation and beam divergence. This implementation also shows the optimized results with respect to spatial mode matching component using spatial aperture and collimating lens as well. The graded results producing the new sight and will have greater attention among the optical wireless technology. The overall analysis of system design promises for better performance even at the treaty of high attenuation loss 49.34 dB/m on the propagation of all spatial modes. Each results obtained in this paper reaches the stability at the greater attenuation with the wavelength range from 1000 nm to 1600 nm.
关键词： Absorption,Attenuation,Underwater,BER,Scattering loss
更新于2025-09-12 10:27:22