Results in Optics最新文献_第7页

Evaluation of UW-Lidar system performance under various conditions 各种条件下UW-Lidar系统性能评估

Results in Optics Pub Date : 2025-06-08 DOI: 10.1016/j.rio.2025.100852

Marwa Jaleel Mohsin , Ali Hayder Abdul Kareem , Heyam A. Marzog

{"title":"Evaluation of UW-Lidar system performance under various conditions","authors":"Marwa Jaleel Mohsin , Ali Hayder Abdul Kareem , Heyam A. Marzog","doi":"10.1016/j.rio.2025.100852","DOIUrl":"10.1016/j.rio.2025.100852","url":null,"abstract":"<div><div>Optical underwater communication offers significant advantages over conventional acoustic communication, including elevated data speeds, reduced latency, lower power usage, and a more compact design. Construction complexity and safety requirements are constantly increasing as the world expands its underwater infrastructure. Water type, absorption, scattering, and other propagation losses influence the distance and range of optical beams underwater.</div><div>This study presents the simulation and design of an underwater light detection and ranging (UW-Lidar) system, which is based on a special design of an optical frequency generator (OFsG) system. Our goal is to enhance the performance of Lidar for underwater applications, specifically in terms of target detector precision. We also investigated the system performance for various conditions, such as different laser beam sources, seawater shallow degrees, and target distances. We utilized Distributed Bragg reflector (DBR) lasers as optical sources, emitting 10 mW of power in the visible spectrum range, specifically the blue-green wavelengths. These wavelengths have low attenuation and can allow for high-bandwidth transmission over short distances. We tested the proposed system’s performance in detecting targets at varying distances (20–40–60 m) in various shallow seawaters for different laser beam source based on Doppler frequency shift between transmitted and reflected signal. The results indicate that the best system performance is when the laser frequency belongs to 550 THz. This system can detect the targets with good received power and an accuracy of up to 0.0414 m in pure water and 0.8513 m in turbid water. The proposed system was simulated used VPI design suite 9.8.</div></div>","PeriodicalId":21151,"journal":{"name":"Results in Optics","volume":"21 ","pages":"Article 100852"},"PeriodicalIF":0.0,"publicationDate":"2025-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144239685","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exploring the Jacobi elliptic and soliton solutions for the nonlinear (1+1)-dimensional Shynaray-IIA equation with conformable derivative 探讨具有相容导数的非线性（1+1）维Shynaray-IIA方程的Jacobi椭圆解和孤子解

Results in Optics Pub Date : 2025-06-05 DOI: 10.1016/j.rio.2025.100843

Muhammad Ishfaq Khan , Jamilu Sabi’ u , Homan Emadifar

{"title":"Exploring the Jacobi elliptic and soliton solutions for the nonlinear (1+1)-dimensional Shynaray-IIA equation with conformable derivative","authors":"Muhammad Ishfaq Khan , Jamilu Sabi’ u , Homan Emadifar","doi":"10.1016/j.rio.2025.100843","DOIUrl":"10.1016/j.rio.2025.100843","url":null,"abstract":"<div><div>In this paper, we study the application of the Jacobi elliptic function expansion method for finding the new exact solutions to the nonlinear <span><math><mrow><mo>(</mo><mn>1</mn><mo>+</mo><mn>1</mn><mo>)</mo><mo>-</mo></mrow></math></span> dimensional Shynaray-IIA equation, including the conformable derivative. The Shynaray-IIA equation takes significant applications in fluid dynamics, plasma physics, and optical fibers, where understanding wave propagation is essential. Exact solutions are crucial because they provide deeper into the fundamental mechanisms, insights and physical phenomena described by the governing equations. The Jacobi elliptic function method offers solutions in the form of general trigonometric and hyperbolic functions for the applied equations. The derived solution could exhibit different wave structures such as rogue waves, bright and dark solitary wave structures. The physical importance of the derived solutions is fully highlighted in the areas of applications of the considered model. Moreover, some solutions are graphically plotted to showcase different wave structures using 3D, 2D and contour plots. The simplicity and usefulness of Jacobi elliptic techniques extend beyond the Shynaray-IIA equations to other challenging partial differential equations in science and technology.</div></div>","PeriodicalId":21151,"journal":{"name":"Results in Optics","volume":"21 ","pages":"Article 100843"},"PeriodicalIF":0.0,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144338953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Propagation of perfect optical vortex beams in a strongly nonlocal nonlinear medium 完美光学涡旋光束在强非局部非线性介质中的传输

Results in Optics Pub Date : 2025-06-04 DOI: 10.1016/j.rio.2025.100842

Bikash K. Das , Camilo Granados , Marcelo F. Ciappina

{"title":"Propagation of perfect optical vortex beams in a strongly nonlocal nonlinear medium","authors":"Bikash K. Das , Camilo Granados , Marcelo F. Ciappina","doi":"10.1016/j.rio.2025.100842","DOIUrl":"10.1016/j.rio.2025.100842","url":null,"abstract":"<div><div>The unique spatial characteristics of perfect optical vortex (POV) beams make them ideal candidates for a wide range of applications, from microparticle trapping and manipulation to optical communication. In this work, we investigate the propagation of POV beams in a strongly nonlocal nonlinear (SNNL) medium. An analytical expression for the complex field amplitude is derived using the ray transfer matrix formalism and the Huygens–Fresnel integral. We numerically study how various beam and medium parameters — such as the topological charge (TC), the ratio of the beam’s ring radius (<span><math><mi>R</mi></math></span>) to its half-ring width (<span><math><msub><mrow><mi>w</mi></mrow><mrow><mn>0</mn></mrow></msub></math></span>), and the nonlocal parameter (<span><math><mi>η</mi></math></span>) — affect the longitudinal intensity distribution of the POV beam. Both non-diffracting and self-focusing effects are clearly observed, accompanied by a periodic intensity distribution along the propagation axis. Increasing the TC has minimal impact on the beam profile size and intensity distribution during the non-diffracting stage. However, in the self-focusing stage, the central dark core expands monotonically with the TC. Additionally, the self-focusing effects diminish and eventually disappear as <span><math><mfrac><mrow><mi>R</mi></mrow><mrow><msub><mrow><mi>w</mi></mrow><mrow><mn>0</mn></mrow></msub></mrow></mfrac></math></span> approaches unity. For a fixed beam wavelength and waist size, the nonlocal parameter exclusively determines the periodicity of the intensity distribution, revealing an inverse relationship between periodicity and nonlocality. These findings may contribute to improved techniques in microparticle trapping and manipulation using POV beams.</div></div>","PeriodicalId":21151,"journal":{"name":"Results in Optics","volume":"21 ","pages":"Article 100842"},"PeriodicalIF":0.0,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144230933","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of opto-mechanical cavity and squeezed vacuum reservoir on V-type three level-laser 光机腔和压缩真空储层对v型三能级激光器的影响

Results in Optics Pub Date : 2025-06-04 DOI: 10.1016/j.rio.2025.100840

Abiyot Mussie, Misrak Getahun

引用次数: 0

Evaluation of effectiveness of FTTX-GPON technology-based narrowband direct modulation using shared WDM-SAC-OCDMA system 基于FTTX-GPON技术的窄带直接调制共享WDM-SAC-OCDMA系统的有效性评估

Results in Optics Pub Date : 2025-05-23 DOI: 10.1016/j.rio.2025.100841

Sura Khalil Ibrahim , Ghusoon M. Ali , Ali Khalid Jasim

{"title":"Evaluation of effectiveness of FTTX-GPON technology-based narrowband direct modulation using shared WDM-SAC-OCDMA system","authors":"Sura Khalil Ibrahim , Ghusoon M. Ali , Ali Khalid Jasim","doi":"10.1016/j.rio.2025.100841","DOIUrl":"10.1016/j.rio.2025.100841","url":null,"abstract":"<div><div>This research presents a secure fiber-to-the-x giga passive optical network (FTTX-GPON) architecture utilizing a narrowband directly modulated vertical-cavity surface-emitting laser (VCSEL). The approach employs wavelength division multiplexing-spectral amplitude coding-optical code division multiple access (WDM-SAC-OCDMA). For feeding (4 × 2) of WDM DEMUX/MUX as an encoder of SAC-OCDMA based on identity column shifting matrix codes (ICSM), four DM-VCSELs are used in an array with a wavelength of 1480.05 nm, spaced at 0.4 nm, with bandwidths of 0.1 nm (state 1) and 0.6 nm with bandwidths of 0.15 nm (state 2). In contrast, each channel is decoded using a uniform singlefiber Bragg grating (FBG). The 16-building College of Engineering at Mustaniriyah University serves as a case study to implement the suggested approach into practice. This system enhances the design, addresses performance issues, and provides coworkers access to secure data. Bit error rate (BER) and Q-factor metrics for 622.08 Mbps, 1.25 Gbps, and 2.5 Gbps are utilized to evaluate system performance. The results indicate that, for 622 Mbps with the ICSM code, the best Q-factor and BER are 23.41 and 1.69 × 10–121, respectively, while without the code, the Q-factor is 21.06 and the BER is 1.03 × 10–98 at the same setting.</div></div>","PeriodicalId":21151,"journal":{"name":"Results in Optics","volume":"21 ","pages":"Article 100841"},"PeriodicalIF":0.0,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144131129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The anisotropic epsilon near zero behaviour of hyperbolic metamaterial in periodic structures and associated transmission characteristics 周期结构中双曲超材料的各向异性epsilon近零行为及相关传输特性

Results in Optics Pub Date : 2025-05-23 DOI: 10.1016/j.rio.2025.100839

Munazza Zulfiqar Ali

引用次数: 0

Turbulence-resistant high speed free-space optical communications using MUTC photodiodes 使用MUTC光电二极管的抗湍流高速自由空间光通信

Results in Optics Pub Date : 2025-05-09 DOI: 10.1016/j.rio.2025.100836

Beibei Cui, Shanyong Cai, Liqian Wang, Zhiguo Zhang

引用次数: 0

Enhanced performance of spin-coated silver-modified titanium dioxide thin films over dip coating method for metformin photodegradation 自旋涂覆银修饰二氧化钛薄膜在二甲双胍光降解中的性能优于浸涂法

Results in Optics Pub Date : 2025-05-02 DOI: 10.1016/j.rio.2025.100838

D’ April Sabriantie Mulus , Muhamad Diki Permana , Sarah Puteri Hayaa’ Prawiranegara , Calya Zahira Tustika , Syelena Prima Putri , Salwa Aulia Zahra , Yusi Deawati , Diana Rakhmawaty Eddy

{"title":"Enhanced performance of spin-coated silver-modified titanium dioxide thin films over dip coating method for metformin photodegradation","authors":"D’ April Sabriantie Mulus , Muhamad Diki Permana , Sarah Puteri Hayaa’ Prawiranegara , Calya Zahira Tustika , Syelena Prima Putri , Salwa Aulia Zahra , Yusi Deawati , Diana Rakhmawaty Eddy","doi":"10.1016/j.rio.2025.100838","DOIUrl":"10.1016/j.rio.2025.100838","url":null,"abstract":"<div><div>Thin film photocatalyst arises as an alternative material for metformin degradation with great recovery and reusability. However, different sol–gel deposition methods namely spin coating and dip coating will affect the characteristics of thin film due to different deposition rates, which affect its surface morphology and its photocatalytic activity. This research aims to compare two different sol–gel deposition methods to synthesize Ag-modified TiO<sub>2</sub> thin films to their characteristics, including surface morphology, crystal structure, optical properties, and photocatalysis efficiency towards metformin. In this research, Ag-TiO<sub>2</sub> sol was coated on glass substrates by two different deposition methods namely manual dip coating (DC) and spin coating (SC) method, and annealed at 500℃. The amorphous-dominant phase is formed by the DC method, while the anatase crystalline phase is formed by the SC method. Ag-TiO<sub>2</sub> thin film synthesized by the SC method gives a lower band gap than the DC method. The TM-EDS revealed that the SC method gives a more uniform morphology and high incorporation of Ag. The photocatalytic test shows an increase in activity with Ag modification approximately 4–5 times from pure TiO<sub>2</sub> thin films with the highest degradation percentage of 22.05 % within 150 min using UVA irradiation achieved by the Ag-TiO<sub>2</sub> thin film deposited by the SC method. This concludes that the spin coating method gives a greater characteristic of Ag-TiO<sub>2</sub> thin film and enhances its photocatalytic activity.</div></div>","PeriodicalId":21151,"journal":{"name":"Results in Optics","volume":"21 ","pages":"Article 100838"},"PeriodicalIF":0.0,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143899440","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of atom and nonlinear crystal on quantum properties of cavity light 原子和非线性晶体对腔光量子特性的影响

Results in Optics Pub Date : 2025-05-02 DOI: 10.1016/j.rio.2025.100831

Abebe Yeshaw, Misrak Getahun

引用次数: 0

Investigation of the optical modal gain in an InAsP/AlGaInP quantum dot laser diode structure InAsP/AlGaInP量子点激光二极管结构的光模态增益研究

Results in Optics Pub Date : 2025-04-28 DOI: 10.1016/j.rio.2025.100835

Mohammed S. Al-Ghamdi , Norah A. Al-anazi , Ivan B. Karomi

{"title":"Investigation of the optical modal gain in an InAsP/AlGaInP quantum dot laser diode structure","authors":"Mohammed S. Al-Ghamdi , Norah A. Al-anazi , Ivan B. Karomi","doi":"10.1016/j.rio.2025.100835","DOIUrl":"10.1016/j.rio.2025.100835","url":null,"abstract":"<div><div>The light–current (L–I) and current–voltage (I–V) characteristics of self-assembled InAsP/AlGaInP quantum dots grown by organometallic vapor-phase epitaxy were measured over a temperature range of 160–400 K. The investigated samples had different cavity lengths (1, 2, 3, and 4 mm). Our results show that the threshold current decreases with increasing cavity length. The lower threshold current density was 212 A/cm<sup>2</sup>, which corresponds to a cavity length of 4 mm. Moreover, the threshold modal gains for various stripe cavity lengths were investigated at room temperature. The longest cavity (4 mm) consisted of many dots; therefore, it easily reached the threshold modal gain of 6.5 cm<sup>−1</sup>. The temperature dependence of the threshold current density (<em>J<sub>th</sub></em>) was investigated. It was found that <em>J<sub>th</sub></em> increased with increasing temperature and it increases faster at high operating temperatures. A 4 mm device is less temperature dependent with <em>T<sub>0</sub></em> ≈ 83 K when operated between 320 and 360 K. The emission spectra exhibited a redshift of approximately 14 nm when the cavity length increased from 1 to 4 mm. The ideality factor and series resistance of the diode laser structures decrease with increasing temperature.</div></div>","PeriodicalId":21151,"journal":{"name":"Results in Optics","volume":"21 ","pages":"Article 100835"},"PeriodicalIF":0.0,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143886515","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0