Optics Communications最新文献_第9页

Vis-SWIR hyperspectral microscopy imaging of plasmonic color printed arrays 等离子体彩色印刷阵列的可见光-西红外高光谱显微成像

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2024-09-24 DOI: 10.1016/j.optcom.2024.131135

引用次数: 0

Exciting topological edge states by using plane waves in valley-Hall photonic crystal slabs 利用谷-霍尔光子晶体板中的平面波激发拓扑边缘态

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2024-09-24 DOI: 10.1016/j.optcom.2024.131142

{"title":"Exciting topological edge states by using plane waves in valley-Hall photonic crystal slabs","authors":"","doi":"10.1016/j.optcom.2024.131142","DOIUrl":"10.1016/j.optcom.2024.131142","url":null,"abstract":"<div><div>Topological edge states are commonly excited by dipole sources or waveguide couplers. In practice, however, such near-field excitations are unfavorable and the simplest way is to use far-field sources. In this report, we theoretically show that the topological edge modes inside the light cone can be directly excited by plane waves via momentum matching, taking valley-Hall topological photonic crystal slabs as examples. Due to the field distributions and mode symmetries, the edge states show different excitation behaviors. One of the edge modes behaves as symmetry-protected bound states in the continuum (BIC) and is excited only by oblique incidence, the Q-factor of which diverges to infinity for normal incidence and drastically decreases for the increase of incident angle. The other one, however, can be excited by far-field for arbitrary incident angle, which does not show the influence on the magnitude of Q-factor. By changing the incident angle, the resonant wavelengths of both modes are tunable and they are determined by the edge bandstructure. Due to the simple excitation scheme and high Q-factors of excited edge states, this proposal will find practical applications, including efficient frequency conversion, sensing, slow light, and optical communications.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142319684","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

1.2 km wireless transmission of 512-QAM signals at 220 GHz using delta-sigma modulation 在 220 千兆赫频率下使用三角Σ调制技术无线传输 512-QAM 信号 1.2 千米

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2024-09-24 DOI: 10.1016/j.optcom.2024.131145

引用次数: 0

Interference mitigation using optimised angle diversity receiver in LiFi cellular network 利用 LiFi 蜂窝网络中的优化角度分集接收器缓解干扰

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2024-09-24 DOI: 10.1016/j.optcom.2024.131125

{"title":"Interference mitigation using optimised angle diversity receiver in LiFi cellular network","authors":"","doi":"10.1016/j.optcom.2024.131125","DOIUrl":"10.1016/j.optcom.2024.131125","url":null,"abstract":"<div><div>Light-fidelity (LiFi) is an emerging technology for high-speed short-range mobile communications. Inter-cell interference (ICI) is an important issue that limits the system performance in an optical attocell network. Angle diversity receivers (ADRs) have been proposed to mitigate ICI. In this paper, the structure of pyramid receivers (PRs) and truncated pyramid receivers (TPRs) are studied. The coverage problems of PRs and TPRs are defined and investigated, and the lower bound of field of view (FOV) for each PD is given analytically. It is shown that the lower bound of FOV for TPR and PR are 20° and 30°, respectively. The impact of random device orientation and diffuse link signal propagation are taken into consideration. The performances of PRs and TPRs are compared, and optimised ADR structures are proposed by jointly considering the impact of tilt angle, FOV, and the number of PDs. For a transmitter-bandwidth limited system, the optimal PD values are 6 for PR and 9 for TPR, whereas, for a receiver-bandwidth limited system, the optimal PD value is 15. In addition, the double source (DS) cell system, where each LiFi AP consists of two sources transmitting the same information signals but with opposite polarity, is proved to outperform the single source cell (SS) system in interference limited or noise-plus-interference limited scenario. However, the SS cell system outperforms the DS cell system in a noise-limited scenario.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142326330","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Programmable metasurface with amplitude-phase joint modulation based on multi-layer stacking strategy 基于多层堆叠策略的振幅-相位联合调制可编程元表面

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2024-09-24 DOI: 10.1016/j.optcom.2024.131152

{"title":"Programmable metasurface with amplitude-phase joint modulation based on multi-layer stacking strategy","authors":"","doi":"10.1016/j.optcom.2024.131152","DOIUrl":"10.1016/j.optcom.2024.131152","url":null,"abstract":"<div><div>Programmable metasurfaces are a type of planar structure that can achieve electromagnetic function regulation through computer programming, which is crucial for building intelligent and controllable electromagnetic control systems. At present, most programmable metasurface modulators are developed based on a single electromagnetic dimension, greatly limiting the application of devices in multitasking platforms. In order to enhance the flexibility of programmable metasurfaces in electromagnetic wave regulation, we design a programmable metasurface by vertically stacking resonance elements. The designed metasurface has strong amplitude-phase joint modulation ability for both <em>x</em>-polarized and <em>y</em>-polarized waves. As a functional demonstration, the metasurface achieves switching between the first-order differential transfer function based on <em>x</em>-polarized waves, the first-order integral transfer function based on <em>x</em>-polarized waves, the first-order differential transfer function based on <em>y</em>-polarized waves, and the first-order integral transfer function based on <em>y</em>-polarized waves. Our design strategy opens up ideas for the research and application of metasurfaces in the fields of reconfigurable and multitasking signal processing and photon computing in the future.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142356944","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Miniaturization of high beam quality 1.543 μm Raman laser with backward stimulated Raman scattering 利用后向受激拉曼散射实现高光束质量 1.543 μm 拉曼激光器的微型化

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2024-09-24 DOI: 10.1016/j.optcom.2024.131136

{"title":"Miniaturization of high beam quality 1.543 μm Raman laser with backward stimulated Raman scattering","authors":"","doi":"10.1016/j.optcom.2024.131136","DOIUrl":"10.1016/j.optcom.2024.131136","url":null,"abstract":"<div><div>It is very challenging to make high peak power (big pulse energy) Raman lasers compact, due to laser induce breakdown (LIB) effect; and it is even more difficult to achieve a decent beam quality meanwhile. In this work, a pulsed 1064 nm laser was used as pump source; pressurized methane was used as Raman active medium, which had the largest ratio of backward/forward Raman gain coefficient among all gaseous media; and backward first Stokes (BS1) Raman laser of 1543 nm with good beam quality was realized. When an f=0.5 m lens was used to focus pump beam into a 0.9 m long Raman cell filled with 3.5 MPa methane, 276.1 mJ BS1 was achieved, the corresponding photon conversion efficiency was 70.8% and the peak power was 83.7 MW. BS1 beam quality was measured to be M<sub>x</sub><sup>2</sup>=2.54,M<sub>y</sub><sup>2</sup>=2.28, which was significantly better than that of pump laser. In a setup of f=0.3 m focal lens and 0.5 m long Raman cell, 197.8 mJ BS1 was achieved, with the company of serious LIB. In order to meliorate LIB and improve BS1 conversion efficiency, the focal lens was tilted by 20°, pump laser beam waist and depth of focus increased significantly, BS1 was improved to 225.0 mJ, the corresponding photon conversion efficiency was 58.5%. An even short focal lens and Raman cell with reasonable BS1 energy was possibly achieved by tilting a shorter focal lens by a larger angle. This work also demonstrated that the increment of BS1 conversion may help to reduce the effect of LIB on SRS process.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142356942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analysis of coded dual-repetition rate single-photon LIDAR 编码双重复率单光子激光雷达分析

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2024-09-24 DOI: 10.1016/j.optcom.2024.131148

{"title":"Analysis of coded dual-repetition rate single-photon LIDAR","authors":"","doi":"10.1016/j.optcom.2024.131148","DOIUrl":"10.1016/j.optcom.2024.131148","url":null,"abstract":"<div><div>Single-photon Light Detection and Ranging (Lidar) has been widely used for long-range ranging due to its single-photon sensitivity and picosecond timing resolution. However, it is still a great challenge to range long-range targets with high accuracy in a short time regardless of whether target is static or dynamic. It is because that the existing long-range single-photon ranging techniques both have non-negligible drawbacks: Coded Signal Ranging (CSSR) with long computation time and Multi-Repetition Rate Ranging (MRRSR) technology with low accuracy. Therefore, the coded multi-repetition rate single-photon ranging (CMSPR) method is proposed to achieve high-accuracy ranging with a short computation time. And coded dual-repetition rate single-photon ranging (CDSPR) system with neighboring coding lengths is proposed to simplify the solution process, which can directly have analytical solutions. Besides, the data centralization method (DCM) based on the coding technique is proposed to further enhance the performance of CDSPR, which is a data pre-processing method based on the characteristics of CDSPR. Results show that CDSPR with DCM can provide a higher ranging error with less computation time.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142326329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced four-band absorption in a tunable graphene subwavelength grating structure for photodetection 用于光探测的可调石墨烯亚波长光栅结构中的增强型四波段吸收

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2024-09-23 DOI: 10.1016/j.optcom.2024.131144

{"title":"Enhanced four-band absorption in a tunable graphene subwavelength grating structure for photodetection","authors":"","doi":"10.1016/j.optcom.2024.131144","DOIUrl":"10.1016/j.optcom.2024.131144","url":null,"abstract":"<div><div>This paper investigates a sub-wavelength multilayer dielectric grating structure based on a simple metasurface, achieving dynamically switchable four-band absorption enhancement. This enhancement spans the visible to near-infrared (NIR) range, with absorption exceeding 90%, representing nearly a 40-fold increase over the intrinsic absorption of a single graphene layer. The contributions of guided-mode resonance (GMR), optical Tamm state (OTS), and photonic crystal defect cavity resonance to the absorption spectra are analyzed separately, offering a method for independent multi-channel signal extraction. Additionally, we explore the impact of structural parameters on the absorption response and examine the broad-spectrum multiband detection mechanism. This mechanism, explained through the integration of resonant cavity perturbation theory and the dynamic tuning of absorption efficiency via graphene's Fermi energy levels, results in an independently tunable optical system for four key operating bands. These properties make the structure suitable for applications such as multiband biomedical photodetectors or components in optoelectronic devices with multiple operating bands.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142356943","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Environmental adaptive enhancement for the bionic polarized compass based on multi-scattering light model 基于多散射光模型的仿生偏振罗盘环境自适应增强技术

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2024-09-21 DOI: 10.1016/j.optcom.2024.131056

{"title":"Environmental adaptive enhancement for the bionic polarized compass based on multi-scattering light model","authors":"","doi":"10.1016/j.optcom.2024.131056","DOIUrl":"10.1016/j.optcom.2024.131056","url":null,"abstract":"<div><div>The bio-polarized compass is an autonomous navigation technology with long-term endurance that has recently attracted the attention of numerous researchers. However, current algorithms for polarimetric compasses based on a single scattering model demonstrate poor adaptability to environmental perturbations. Numerous academic studies have conclusively demonstrated that the multi-scattering model provides a more accurate approximation of the actual scenario. Inspired by insects, we find that multi-scattering models have better environmental adaptability. However, the mathematical formalism of multi-scattering models is generally complex, making it difficult to obtain the solar vector directly from the polarization pattern. Therefore, we propose an inverse algorithm that combines the simulated annealing algorithm and a multi-scattering model, the equivalent incident light model(EIL model), to derive the solar vector from the polarized pattern with strong environmental adaptability. Five experimental sets were conducted across diverse environments, revealing that the errors associated with the bionic polarized compass are consistently below 0.4°, representing a substantial improvement compared to existing compass technology.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142433202","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High birefringent slotted core slotted cladding porous core PCF for THz waveguide 用于太赫兹波导的高双折射槽形铁芯槽形包层多孔铁芯 PCF

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2024-09-21 DOI: 10.1016/j.optcom.2024.131120

{"title":"High birefringent slotted core slotted cladding porous core PCF for THz waveguide","authors":"","doi":"10.1016/j.optcom.2024.131120","DOIUrl":"10.1016/j.optcom.2024.131120","url":null,"abstract":"<div><div>A novel design featuring a porous core photonic crystal fiber (PC-PCF) is proposed in this paper for terahertz (THz) waveguide application. This work uses finite element method (FEM) and a boundary condition related to perfectly matched layer (PML) for analyzing the guiding properties. This methodology is supported by a fiber type featuring a slotted core and slotted cladding, utilizing Zeonex as the material. It offers high birefringence valued at 0.0978, small confinement loss of 10<sup>−14</sup> dB/cm, a meager amount of effective material loss (EML) valued at 0.011697 dB/cm and a very high core power fraction (CPF) of 67.156%. Additionally, it shows a flattened pattern of dispersion measuring 0.4 ± 0.2 ps/THz/cm at an extensive frequency range of 0.5 THz to 2 THz. Other significant waveguide properties: effective refractive index, numerical aperture (NA), V-parameter, effective area, spot size, and beam divergence of the suggested fiber are numerically analyzed and conferred thoroughly. Regarding its mode of operation, the proposed fiber primarily functions in multimode, but it can also operate in single mode for higher porosity levels and lower core diameters. This unique characteristic renders the proposed PC-PCF structure well-suited for a broad range of applications, offering versatility as to its mode of operation.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0030401824008575/pdfft?md5=420c5725745af2823a860447ad257e89&pid=1-s2.0-S0030401824008575-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142315246","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0