Optics Communications最新文献_第8页

Design and optimization of a grating-free external cavity diode laser with over 6 THz phase-continuous tunability

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-01-09 DOI: 10.1016/j.optcom.2025.131504

Jiuyuan Zhu , Yang Gao , Bo Zhang , Zhongwen Deng , Yuanlong Fan , Xinjian Zhang , Adam Jones , Nigel Copner , Kang Li

引用次数: 0

Advancing optomechanical sensing: Novel CMOS-compatible plasmonic pressure sensor with Silicon-Insulator-Silicon waveguide configuration

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-01-09 DOI: 10.1016/j.optcom.2025.131495

Abdullah Taharat, Mohammad Abrar Kabir, Aseer Imad Keats, A.K.M. Rakib, Rakibul Hasan Sagor

{"title":"Advancing optomechanical sensing: Novel CMOS-compatible plasmonic pressure sensor with Silicon-Insulator-Silicon waveguide configuration","authors":"Abdullah Taharat, Mohammad Abrar Kabir, Aseer Imad Keats, A.K.M. Rakib, Rakibul Hasan Sagor","doi":"10.1016/j.optcom.2025.131495","DOIUrl":"10.1016/j.optcom.2025.131495","url":null,"abstract":"<div><div>This article introduces a novel Complementary Metal Oxide Semiconductor (CMOS) compatible plasmonic optical pressure sensor featuring a Silicon-Insulator-Silicon (SIS) waveguide configuration. The sensor design incorporates a railtrack resonator coupled to a straight waveguide with gratings, further enhanced by embedding silicon nanorods into the waveguide and resonator cavity. Finite element method (FEM) was used to perform numerical investigation and evaluate the performance of our sensor. The proposed sensor exhibits a pressure sensitivity of 51.075 nm/MPa, surpassing that of previous silver-based sensors and showcasing the potential of silicon in plasmonic sensing applications. Moreover, this work represents the first instance of employing CMOS-compatible silicon for designing an optical pressure sensor, thereby bridging the gap between plasmonic optomechanical sensors and nanoelectronics while circumventing the compatibility issues typically associated with metals in standard CMOS fabrication processes. By leveraging silicon as a plasmonic material, we have effectively addressed the constraints, such as lack of tunability and poor optical and thermal stability, that are suffered by traditional metal-based sensors. Moreover, building upon the recent advancements in silicon photonics, the need for setting up new manufacturing infrastructures for novel materials, such as transition metal nitrides, is overcome by the use of silicon due to the well-established fabrication facility of the silicon industry. The sensor’s versatility and impact across diverse domains are highlighted by its potential applications, including gas leakage detection, flow rate measurement and refractive index sensing for early diagnosis of organ rejection post-transplantation.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"578 ","pages":"Article 131495"},"PeriodicalIF":2.2,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143104191","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

Research on resource allocation of hybrid indoor VLC networks

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-01-08 DOI: 10.1016/j.optcom.2025.131503

XiZheng Ke, MengXia Wei, Huanhuan Qin

{"title":"Research on resource allocation of hybrid indoor VLC networks","authors":"XiZheng Ke, MengXia Wei, Huanhuan Qin","doi":"10.1016/j.optcom.2025.131503","DOIUrl":"10.1016/j.optcom.2025.131503","url":null,"abstract":"<div><div>To address the resource allocation (RA) challenge in heterogeneous visible light communication (VLC) networks, this study develops an indoor VLC hybrid system comprising multiple VLC access points (APs), a single radio frequency (RF) access point, and a single infrared (IR) AP. A joint load balancing and power allocation strategy is proposed for the VLC/RF downlink, accompanied by an iterative algorithm and optimization framework tailored for the power allocation subproblem, which allocates power to each AP to maximize data throughput. The algorithm determines optimal power distribution through alternating solutions of dual variables. Furthermore, the effective capacity of a single user with varying quality of service (QoS) requirements in the IR uplink is examined, employing four distinct power control strategies: equal power allocation and Water-Filling algorithm, sub-channel independent optimization algorithm, and sub-channel joint optimization algorithm within simulations. Results indicate that this approach is agnostic to step size or initial variable values while offering enhanced convergence speed and performance compared to traditional subgradient methods. System capacity and fairness are notably improved alongside rapid convergence rates. Considering performance metrics based on system capacity, the sub-channel joint optimization algorithm is the optimal power control strategy.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"578 ","pages":"Article 131503"},"PeriodicalIF":2.2,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143104104","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

A high-sensitivity curvature mini-two-path MZI fiber sensor based on a four-core fiber

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-01-08 DOI: 10.1016/j.optcom.2024.131457

Xiaojun Zhu , Jiajia Wang , Jiayi Qian , Yan Wang , Hai Liu , Juan Cao , Yuechun Shi , Yongjie Yang , Jicong Zhao , Wuming Wu

{"title":"A high-sensitivity curvature mini-two-path MZI fiber sensor based on a four-core fiber","authors":"Xiaojun Zhu , Jiajia Wang , Jiayi Qian , Yan Wang , Hai Liu , Juan Cao , Yuechun Shi , Yongjie Yang , Jicong Zhao , Wuming Wu","doi":"10.1016/j.optcom.2024.131457","DOIUrl":"10.1016/j.optcom.2024.131457","url":null,"abstract":"<div><div>We propose and demonstrate a high curvature sensitivity fiber sensor with a mini-two-path Mach-Zehnder interferometer (MTP-MZI) structure based on four-core fiber (FCF). A simple arc discharge technology is used to fabricate the MTP-MZI, where the sensing path is an in-line MZI (IMZI) structure that directly sandwiched the FCF between two sections of coreless fiber (CLF), and the reference path is a single-mode fiber (SMF) only. When the curvature changes from 0 m<sup>−1</sup> to 0.101045 m<sup>-1</sup>, the IMZI sensor has a maximum curvature sensitivity of 57.29 dB/m<sup>−1</sup>, while the MTP-MZI sensor has a sensitivity of 108.29 dB/m<sup>−1</sup>, the curvature sensitivity has been improved by 1.89 times, which is the highest intensity-modulated curvature sensitivity based on multi-core fiber, to the best of our knowledge. The comparable experiment illustrated that the MTP-MZI structure can effectively enhance the sensor's sensitivity and provide an effective method to prepare a good-performance sensor with low-cost, miniaturized, and simple requirement technology.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"578 ","pages":"Article 131457"},"PeriodicalIF":2.2,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143104127","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

The mechanisms of particulates sprayed by optical components under intense laser irradiation on the damage performance of dielectric films

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-01-08 DOI: 10.1016/j.optcom.2025.131502

Zixuan Chen, Ye Tian, Fang Wang, Laixi Sun, Hongjie Liu, Xuewei Deng, Qiang Yuan, Yuhai Li

{"title":"The mechanisms of particulates sprayed by optical components under intense laser irradiation on the damage performance of dielectric films","authors":"Zixuan Chen, Ye Tian, Fang Wang, Laixi Sun, Hongjie Liu, Xuewei Deng, Qiang Yuan, Yuhai Li","doi":"10.1016/j.optcom.2025.131502","DOIUrl":"10.1016/j.optcom.2025.131502","url":null,"abstract":"<div><div>In high-power laser facilities, the particulate contaminants originating from damaged optical components play a pivotal role in degrading the laser-induced damage performance of other components. In this study, our attention was centered on high reflectance multilayer HfO₂/SiO₂ dielectric film components. We delved deep into the mechanisms underlying particulate generation and deposition during the damage process and probed into how these particulate contaminants lead to performance degradation of the components. Firstly, we created damage to generate particulates in a sealed environment to investigate the rules of particulates generation and deposition. Then measured the laser induced damage threshold and the morphology of contaminated dielectric film, the laser induced damage threshold decreased by approximately 63.6%–83.5% and the damage morphology varied. We elucidated the modulation mechanisms of particulate contaminants parameters (composition, size, light transmission performance) on the electric field and light intensity by the utilization of multi-physics field simulations, particulate contaminants increased both the peak and range of the electric field/light field around the component during the fundamental frequency laser irradiation. The research results provided a research foundation for inhibiting particulate contaminants generation and removing surface contaminants from optical components in high-power laser facilities.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"579 ","pages":"Article 131502"},"PeriodicalIF":2.2,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143159941","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

Ultra-highly sensitive Fano resonator with dynamic tunability based on plasmonics

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-01-08 DOI: 10.1016/j.optcom.2025.131477

Wen Zhang , Qijia Weng , Yuanmei Xu , Hui Liu , Xue-Shi Li

{"title":"Ultra-highly sensitive Fano resonator with dynamic tunability based on plasmonics","authors":"Wen Zhang , Qijia Weng , Yuanmei Xu , Hui Liu , Xue-Shi Li","doi":"10.1016/j.optcom.2025.131477","DOIUrl":"10.1016/j.optcom.2025.131477","url":null,"abstract":"<div><div>A novel Fano resonator can be dynamically tuned as well as keep pretty high sensitivity at the same time. The Fano resonator is designed by a triangular ring-like cavity coupled with a metal–insulator–metal (MIM) waveguide, enabling it to resonant in the terahertz band. The device’s performance is analyzed using the finite element method (FEM), and its resonances are validated with multimode interference coupled-mode theory (MICMT). The simulation results show that triangular ring-like cavity structure coupled with the rectangular structure will excite two asymmetric Fano resonances. According to the Fabry–Pérot (FP) resonant theory, the Fano resonant frequency can be easily manipulated by changing the cavity structure parameters. In addition, by integrating graphene into the resonator, it is possible to significantly shift the Fano resonance peak by altering the Fermi energy level, reaching up to 229 GHz. The Fano resonators are also very sensitive to the medium they interact with, achieving a maximum figure of merit (FOM) of 25,853. Finally, the Fano resonator is applied in cancer cell detection to expand the detection band while maintaining accurate detection. The proposed resonator’s superior performance offers potential in medium detection, narrowband filtering, and frequency selection, etc.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"578 ","pages":"Article 131477"},"PeriodicalIF":2.2,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143172091","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

Enhancement in power stratification efficiency of NOMA-MIMO-aided downlink indoor visible light communication networks

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-01-08 DOI: 10.1016/j.optcom.2025.131499

Haylemaryam Gashaw Geto, Gemechu Tesfaye Tola

{"title":"Enhancement in power stratification efficiency of NOMA-MIMO-aided downlink indoor visible light communication networks","authors":"Haylemaryam Gashaw Geto, Gemechu Tesfaye Tola","doi":"10.1016/j.optcom.2025.131499","DOIUrl":"10.1016/j.optcom.2025.131499","url":null,"abstract":"<div><div>Non-orthogonal multiple access (NOMA)-aided visible light communication (VLC) network is deemed a potential alternative for data access and offers superior spectral efficiency, primarily for indoor communication systems. Despite its apparent advantages, the NOMA technique suffers from residual interference in multi-user multiple-input multiple-output (MIMO)-based VLC networks when users attempt to reconstruct their signals from the superimposed received signal. To combat such difficulties, developing an optimal and adaptive power splitting algorithm is crucial. In this paper, a novel power stratification strategy termed as sigmoid gain ratio power allocation (SGRPA) is proposed to alleviate the power allocation constraints of MIMO-NOMA-based downlink VLC networks through sigmoid function transformation. A comparative study between conventional power allocation approaches for a <span><math><mrow><mn>2</mn><mo>×</mo><mn>2</mn></mrow></math></span> MIMO-based VLC network is conducted in multi-user indoor environment. We also illustrate the impact of tuning the field of views (FoVs) of receivers and the transmission angles of light-emitting diodes (LEDs) to find the optimal position of the VLC access point (AP) and the user FoV. The proposed SGRPA scheme exhibits a significant data rate enhancement when compared to gain ratio power allocation (GRPA), normalized gain difference power allocation (NGDPA), and normalized logarithmic gain ratio power allocation (NLGRPA) methods with a multi-user scenario.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"579 ","pages":"Article 131499"},"PeriodicalIF":2.2,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143159732","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

Quad-functional narrowband-broadband electrical/thermal dual-controlled adjustable metasurface absorber

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-01-07 DOI: 10.1016/j.optcom.2025.131494

Muhammad Ali , Yunpeng Yao , Riaz Ali , Laleen Ali , Zaib Ullah Khan , Sajjad Ali , Jawad Ali , Zainab Saif , Wei Su

{"title":"Quad-functional narrowband-broadband electrical/thermal dual-controlled adjustable metasurface absorber","authors":"Muhammad Ali , Yunpeng Yao , Riaz Ali , Laleen Ali , Zaib Ullah Khan , Sajjad Ali , Jawad Ali , Zainab Saif , Wei Su","doi":"10.1016/j.optcom.2025.131494","DOIUrl":"10.1016/j.optcom.2025.131494","url":null,"abstract":"<div><div>This study presents a novel terahertz metamaterial absorber that utilizes the adjustable properties of vanadium dioxide and graphene to dynamically alter its functions and absorption bands. The finite-difference time-domain (FDTD) modelling results show that the suggested design can effectively absorb a wide range of frequencies and two narrow bands at the same time. The absorption frequency of the QMA can be change by controlling the chemical potential of graphene and the temperature of VO<sub>2</sub>. The QMA show switchable character between narrowband absorption mode “NAM” and broadband absorption mode “BAM” by electronically varying the chemical potential of graphene, it can be seen in P<sub>1</sub> and P<sub>2</sub> at frequency 2.79 and 3.33 THz respectively. Thermal modification of VO<sub>2</sub> phase shift allows the low-frequency absorption mode (“LAM”) and the high-frequency absorption mode (“HAM”) to transition between P<sub>3</sub> and P<sub>4</sub>, which correspond to frequencies of 3.53 and 4.43 THz, respectively. The mechanism of “NAM” and “BAM” is found to be the transition between the fundamental and second order graphene surface resonances, whereas the phase change in VO<sub>2</sub> is responsible for the transition between “LAM” and “HAM”. Furthermore, the QMA is polarization independent in all absorption modes. These results imply that the suggested QMA has a great deal of promise for use in sensing, filtering, switching and stealth applications.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"578 ","pages":"Article 131494"},"PeriodicalIF":2.2,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143104130","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

External modulation of a CW fiber laser via thermocavitation microbubbles: A novel approach for short pulse generation

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-01-07 DOI: 10.1016/j.optcom.2025.131501

R. Zaca-Morán , A. Guzmán-Barraza , Noel-Ivan Toto-Arellano , P. Zaca-Morán , J.G. Ortega-Mendoza

{"title":"External modulation of a CW fiber laser via thermocavitation microbubbles: A novel approach for short pulse generation","authors":"R. Zaca-Morán , A. Guzmán-Barraza , Noel-Ivan Toto-Arellano , P. Zaca-Morán , J.G. Ortega-Mendoza","doi":"10.1016/j.optcom.2025.131501","DOIUrl":"10.1016/j.optcom.2025.131501","url":null,"abstract":"<div><div>This research introduces a novel method for generating short pulses using microbubbles produced by thermocavitation, a process initiated in both absorbent and non-absorbent solutions. The innovation uses a multimode optical fiber, onto which silver and copper nanoparticles are photodeposited, enabling precise control over the pulse generation process. By immersing the fiber tip in ethanol or a <em>Hibiscus flower</em> extract in ethanol, tunable pulses are generated with frequencies ranging from 0.4 to 3.3 kHz in ethanol and 0.64–2.8 kHz in the <em>Hibiscus</em> solution, with pulse durations of 15–81 μs and 22–41 μs, respectively. The emitted pulse wavelength remains consistently at 443 nm, demonstrating the system's ability to produce short, precise pulses across different media. Additional experiments were carried out using methylene blue as the working solution. A maximum frequency of 1.51 kHz was achieved through interaction with a continuous-wave laser at a wavelength of 658 nm. Subsequently, ethanol was used as the medium, achieving a maximum frequency of 1.43 kHz with a laser operating at a wavelength of 976 nm. The innovation of this device is attributed to its tunability and versatility in using various media to control pulse characteristics. This flexibility, combined with a relatively simple and cost-effective fabrication process, positions the system as a promising solution for applications in quantum telecommunications, ophthalmic surgery, ultrasound imaging, metrology, and sensor technology. Its ability to generate controlled, high-frequency pulses from thermocavitation microbubbles marks a significant advancement in pulse generation technology.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"579 ","pages":"Article 131501"},"PeriodicalIF":2.2,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143159945","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

Comprehensive and analytical investigation of topological interface states in one-dimensional photonic systems

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-01-07 DOI: 10.1016/j.optcom.2025.131500

Jamal Barvestani

{"title":"Comprehensive and analytical investigation of topological interface states in one-dimensional photonic systems","authors":"Jamal Barvestani","doi":"10.1016/j.optcom.2025.131500","DOIUrl":"10.1016/j.optcom.2025.131500","url":null,"abstract":"<div><div>Topological interface states (TISs) have attracted considerable interest due to their exceptional impact on enhancing light-matter interactions in photonic systems. We investigate the TISs in a one-dimensional photonic heterostructure incorporating a cap layer. The behavior of TISs is examined using the transfer matrix method, varying the physical parameters of the cap layer. An analytical expression for TISs is derived using a direct matching approach based on the Kronig-Penney model. The analytical results acquired for TIS have been simulated across several configurations, and the outcomes indicate full consistency. Our findings indicate that TISs are highly sensitive to the thickness of the cap layer, exhibiting a periodic dependency on its variation. While the cap layer’s permittivity affects the position of TISs, its influence is weaker compared to that of the thickness. Additionally, we analyzed the impact of nonlinearity by adding a thin nonlinear layer at the interface and found that TISs are extremely responsive to the cap layer’s nonlinearity. These results could support the integration of TISs into future topological cavity and laser applications.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"578 ","pages":"Article 131500"},"PeriodicalIF":2.2,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143103667","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