Optics Communications最新文献_第3页

Burst mode amplification through Yb doped PCF ROD amplifier to generate mJ burst energy with femtosecond multi-micro bunch structure in all fiber laser system 在全光纤激光系统中，通过掺镱PCF ROD放大器实现突发模式放大，产生具有飞秒多微束结构的mJ突发能量

IF 2.5 3区物理与天体物理

Optics Communications Pub Date : 2025-09-22 DOI: 10.1016/j.optcom.2025.132481

Bappa Karmakar , A. Aryshev , Joydeep Karmakar , Madhuri Aggarwal , B.K. Sahu , P.K. Mukhopadhyay , Subhendu Ghosh , Sunil Kumar

{"title":"Burst mode amplification through Yb doped PCF ROD amplifier to generate mJ burst energy with femtosecond multi-micro bunch structure in all fiber laser system","authors":"Bappa Karmakar , A. Aryshev , Joydeep Karmakar , Madhuri Aggarwal , B.K. Sahu , P.K. Mukhopadhyay , Subhendu Ghosh , Sunil Kumar","doi":"10.1016/j.optcom.2025.132481","DOIUrl":"10.1016/j.optcom.2025.132481","url":null,"abstract":"<div><div>We report generation of burst-mode infrared pulses (1030 nm) with a total energy of approximately 3 mJ, achieved using chirped pulse amplification (CPA) in Yb-doped photonic crystal fiber (PCF) rod amplifiers, seeded with a multi-microbunch pulse structure. The individual pulse energy within the burst ranged from ∼111 μJ (maximum) to ∼14 μJ (minimum). These pulses were successfully compressed to an estimated pulse width of ∼335 fs using a grating-based compressor. The seed source was an in-house developed Yb-doped fiber oscillator, passively mode-locked at 130 MHz using the nonlinear polarization rotation (NPR) technique. A commercial semiconductor optical amplifier (SOA) was employed as a high-efficiency pulse picker, enabling the selection of user-defined multi-micro pulse structures within a 4 μs time window at a 10 Hz burst repetition rate representing a three-time scale burst pulses. The selected pulse structure was amplified through multiple stages, culminating in two Yb-doped PCF rod amplifiers. Through optimization of the pulsed pump configuration, we maximized the gain for the leading pulses within the burst train. The resulting output comprised a multi-MHz repetition rate pulse train with the central lobe compressed to pulse width of ∼335 fs and peak individual pulse energy of <em>∼</em>111 ± 4 μJ, contributing to a total burst energy of ∼3.1 ± 0.09 mJ. These high-energy, ultrafast burst pulses are currently being utilized to generate high-current electron bursts from photocathode in the Delhi Light Source (DLS), a pre-bunched free electron laser facility under development at IUAC, New Delhi.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"596 ","pages":"Article 132481"},"PeriodicalIF":2.5,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145159256","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-performance mid-infrared fingerprint detection and solution sensing based on quasi-bound states in the continuum 基于连续介质中准束缚态的高性能中红外指纹检测与溶液传感

IF 2.5 3区物理与天体物理

Optics Communications Pub Date : 2025-09-21 DOI: 10.1016/j.optcom.2025.132499

Cong Chen , Junyi Liu , Xiaoshan Liu , Guiqiang Liu , Guolan Fu , Jing Chen , Wei Du , Chaojun Tang , Juan Deng , Zhengqi Liu

{"title":"High-performance mid-infrared fingerprint detection and solution sensing based on quasi-bound states in the continuum","authors":"Cong Chen , Junyi Liu , Xiaoshan Liu , Guiqiang Liu , Guolan Fu , Jing Chen , Wei Du , Chaojun Tang , Juan Deng , Zhengqi Liu","doi":"10.1016/j.optcom.2025.132499","DOIUrl":"10.1016/j.optcom.2025.132499","url":null,"abstract":"<div><div>All-dielectric metasurfaces have become a popular platform for mid-infrared molecular fingerprint detection. However, since the absorption rate of the two-port leaky mode system can only reach a maximum of 0.5, this limits the contrast of the absorbed signal. In this work, we propose an all-dielectric quasi-bound states in the continuum (quasi-BIC) metasurface and realize mid-infrared molecular fingerprint detection based on the extinction coefficient of the substances being detected on the transmission of quasi-BIC. Using boron carbide (B<sub>4</sub>C) as an example, we successfully measure its mid-infrared molecular fingerprint spectrum and achieve satisfactory results within nm-scale films. Additionally, it also demonstrates excellent sensing performance, with a sensitivity (<em>S</em>) up to 927.5 nm/RIU and a figure of merit (FOM) value of 98670.21/RIU, enabling the detection of sodium chloride (NaCl) solution concentration differences as low as 0.009 % and Bovine Serum Albumin (BSA) solution concentration differences as low as 0.005 %. These results indicate the potential application of our metasurface in mid-infrared fingerprint detection and solution sensing.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"596 ","pages":"Article 132499"},"PeriodicalIF":2.5,"publicationDate":"2025-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145119362","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 new method for recording single-shot two-scales in-line holograms: Application to the visualization of a stretched viscoelastic fluid 一种记录单镜头双尺度直线全息图的新方法：在拉伸粘弹性流体可视化中的应用

IF 2.5 3区物理与天体物理

Optics Communications Pub Date : 2025-09-20 DOI: 10.1016/j.optcom.2025.132408

Denis Lebrun, Gilles Godard, Marie-Charlotte Renoult, Robin Noury

引用次数: 0

Tunable multi-wavelength random fiber laser based on a hybrid filter composed of Mach–Zehnder interferometer and Sagnac loop 基于Mach-Zehnder干涉仪和Sagnac环路混合滤波器的可调谐多波长随机光纤激光器

IF 2.5 3区物理与天体物理

Optics Communications Pub Date : 2025-09-20 DOI: 10.1016/j.optcom.2025.132494

Lihang Xu , Wei He , Shaode Li , Qiongyue Zhang

{"title":"Tunable multi-wavelength random fiber laser based on a hybrid filter composed of Mach–Zehnder interferometer and Sagnac loop","authors":"Lihang Xu , Wei He , Shaode Li , Qiongyue Zhang","doi":"10.1016/j.optcom.2025.132494","DOIUrl":"10.1016/j.optcom.2025.132494","url":null,"abstract":"<div><div>A tunable and switchable multi-wavelength linear half-open cavity erbium-doped random fiber laser (RFL) based on a hybrid filter composed of tunable Mach-Zehnder interferometer (MZI) and Sagnac loop was proposed. The MZI incorporating optical delay line (ODL) was embedded within the Sagnac loop to form a hybrid filter. Random distributed feedback (RDFB) was provided by backward Rayleigh scattering generated by single-mode fiber (SMF). The laser showed a threshold of 61 mW and a slope efficiency of approximately 2.15 %. With the ODL delay fixed and pump power set at 248 mW, three distinct lasing states were achieved by adjusting the polarization controller (PC), corresponding to 9-, 6-, and 3-channel multi-wavelength random outputs. When the ODL delay time was increased, the free spectral range (FSR) of the MZI decreased, compressing the spectral bandwidth and reducing the number of output channels to 5, 4, and 2, respectively. Additional lasing states were realized by further adjusting the ODL and PC. The laser output remained stable, with an intensity standard deviation–to–mean ratio of 0.276 % and a maximum power fluctuation of 0.141 mW. The proposed RFL featured a compact structure, stable multi-wavelength output, and flexible tunable, showing promise for applications in distributed sensing and imaging systems.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"596 ","pages":"Article 132494"},"PeriodicalIF":2.5,"publicationDate":"2025-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145119245","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

TV regularized low-rank sparse decomposition of infrared polarization component image for small target detection under complex backgrounds 电视正则化低秩稀疏分解红外偏振分量图像用于复杂背景下的小目标检测

IF 2.5 3区物理与天体物理

Optics Communications Pub Date : 2025-09-20 DOI: 10.1016/j.optcom.2025.132470

Yunyou Hu , Xianmeng Meng , Yunxiang Zhang , Zhiguo Fan , Dandan Zhi

{"title":"TV regularized low-rank sparse decomposition of infrared polarization component image for small target detection under complex backgrounds","authors":"Yunyou Hu , Xianmeng Meng , Yunxiang Zhang , Zhiguo Fan , Dandan Zhi","doi":"10.1016/j.optcom.2025.132470","DOIUrl":"10.1016/j.optcom.2025.132470","url":null,"abstract":"<div><div>Infrared small-target detection in complex backgrounds remains a significant challenge. Infrared polarization imaging provides an effective means of enhancing target contrast. However, edge clutter from the observed scene and polarization resolution noise greatly restrict the application of infrared polarization images for small target detection, and many typical and contemporary infrared target detection algorithms are unsuitable for such images. To address these challenges, we construct an image representing the infrared polarization component using the partial elements of the Stokes vector. A total variation (TV) regularized low-rank sparse decomposition method is proposed to decompose infrared polarization component images into target, noise, and background. Owing to the target’s geometric regularity and the discrete nature of noise, TV regularization is employed to suppress impulse noise and edge clutter that resembles target structures, resulting in a denoised and more accurate target representation. The augmented Lagrange multiplier method is developed to solve the proposed optimization problem. An experiment was conducted on the detection of a hovering unmanned aerial vehicle target against a complex background. Compared with state-of-the-art infrared small-target detection algorithms, our method achieves highly effective detection for both low-contrast and high-contrast targets.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"596 ","pages":"Article 132470"},"PeriodicalIF":2.5,"publicationDate":"2025-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145119247","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

Sub-100 fs precision clock-offset measurement over a 100 km fiber link 在100公里光纤链路上进行100秒以下精确时钟偏移测量

IF 2.5 3区物理与天体物理

Optics Communications Pub Date : 2025-09-20 DOI: 10.1016/j.optcom.2025.132495

Fei Meng , Yunfeng Wu , Yanrong Song , Zhigang Zhang

引用次数: 0

High-quality data augmentation method based on multi-scale dense attention-enhanced CGAN for Φ-OTDR event recognition 基于多尺度密集关注增强CGAN的Φ-OTDR事件识别高质量数据增强方法

IF 2.5 3区物理与天体物理

Optics Communications Pub Date : 2025-09-20 DOI: 10.1016/j.optcom.2025.132429

Wei Shen , Yi Huang , Yi Zhang , Ziyi Wei , Chengyong Hu , Chuanlu Deng , Yanhua Dong , Wei Jin , Lin Chen , Qi Zhang , Wei Chen , Fufei Pang , Xiaobei Zhang , Jianming Tang , Tingyun Wang

{"title":"High-quality data augmentation method based on multi-scale dense attention-enhanced CGAN for Φ-OTDR event recognition","authors":"Wei Shen , Yi Huang , Yi Zhang , Ziyi Wei , Chengyong Hu , Chuanlu Deng , Yanhua Dong , Wei Jin , Lin Chen , Qi Zhang , Wei Chen , Fufei Pang , Xiaobei Zhang , Jianming Tang , Tingyun Wang","doi":"10.1016/j.optcom.2025.132429","DOIUrl":"10.1016/j.optcom.2025.132429","url":null,"abstract":"<div><div>A data augmentation method based on multi-scale dense attention-enhanced (MDA) conditional generative adversarial network (CGAN) is proposed for generating high-quality samples, which aims to address the challenge of limited data acquisition in phase-sensitive optical time-domain reflectometry (<span><math><mi>Φ</mi></math></span>-OTDR). The raw data from the <span><math><mi>Φ</mi></math></span>-OTDR system can be transformed into visualized two-dimensional images to extract real disturbance data, with each disturbance type displaying distinguishable features in the generated images. The MDA U-Net is incorporated as the generator in the CGAN to produce samples for dataset expansion, where the dense convolutional block attention module is added to the skip connection to focus on the key information of events, and the single-layer output of U-Net is replaced with a multi-scale connection output for multi-layer feature fusion. The discriminator adopts a multi-scale convolution structure to enhance the discriminant ability. The multi-event recognition experiments for the fenced fiber optic demonstrate that the augmented dataset enables three testing classification models to achieve recognition accuracy above 97.93%.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"596 ","pages":"Article 132429"},"PeriodicalIF":2.5,"publicationDate":"2025-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145119242","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

Multidirectional all-optical precompensation and forward relay for HAPS-assisted free-space optical communications haps辅助自由空间光通信的多向全光预补偿和正向中继

IF 2.5 3区物理与天体物理

Optics Communications Pub Date : 2025-09-19 DOI: 10.1016/j.optcom.2025.132471

Young-Jin Hyun, Hye-min Park, Sang-Kook Han

引用次数: 0

Research on optical sideband signal wavefront damage repair technology in optical fibers 光纤中光边带信号波前损伤修复技术研究

IF 2.5 3区物理与天体物理

Optics Communications Pub Date : 2025-09-19 DOI: 10.1016/j.optcom.2025.132474

XueCheng Zhang, YunFei Ge, YiYing Gu, WanYing Lian, JingHong Hu, MingShan Zhao

{"title":"Research on optical sideband signal wavefront damage repair technology in optical fibers","authors":"XueCheng Zhang, YunFei Ge, YiYing Gu, WanYing Lian, JingHong Hu, MingShan Zhao","doi":"10.1016/j.optcom.2025.132474","DOIUrl":"10.1016/j.optcom.2025.132474","url":null,"abstract":"<div><div>In response to the technical demands of integrated sensing and communication (ISAC) systems for the sixth generation (6G), this paper addresses the critical issue of optical sideband wavefront distortion in holographic radio receiver and proposes a wavefront self-repair technique based on sawtooth voltage modulation. By using a single-bit analog-to-digital converter (ADC) to capture phase information in real time and constructing a low-complexity closed-loop system with field-programmable gate array (FPGA) and an 8-channel serial digital-to-analog converter (DAC), dynamic monitoring and compensation of inter-channel relative phase errors are achieved. Experimental results show that the <span><math><mrow><mn>3</mn><mi>σ</mi></mrow></math></span> value of phase error after repair is 6.61°, with a root mean square (RMS) error of 2.20°, meeting the phase control precision standard of <span><math><mrow><mi>λ</mi><mo>/</mo><mn>10</mn></mrow></math></span>. By analyzing the phase correlation between the carrier and first-order sideband, we propose an innovative passive control method that enables static phase offset correction between channels without additional components, while reducing reliance on radio frequency (RF) wave control systems. This technique provides an effective solution for wavefront repair and optical beam control in large-scale holographic radio receiver of the future.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"596 ","pages":"Article 132474"},"PeriodicalIF":2.5,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145119367","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

Photonic spin Hall effect in graphene-enabled merged bound states in the continuum 连续体中石墨烯使能的合并束缚态中的光子自旋霍尔效应

IF 2.5 3区物理与天体物理

Optics Communications Pub Date : 2025-09-18 DOI: 10.1016/j.optcom.2025.132486

Lokesh Ahlawat, Kamal Kishor, Ravindra Kumar Sinha

{"title":"Photonic spin Hall effect in graphene-enabled merged bound states in the continuum","authors":"Lokesh Ahlawat, Kamal Kishor, Ravindra Kumar Sinha","doi":"10.1016/j.optcom.2025.132486","DOIUrl":"10.1016/j.optcom.2025.132486","url":null,"abstract":"<div><div>This research paper presents a novel photonic structure design to achieve an ultra-high spin-dependent shift associated with the Photonic Spin Hall Effect (PSHE) possessing high Q-factor. The high quality Q-factor is achieved through the merging of two distinct Bound States in the Continuum (BICs): the Friedrich–Wintgen BIC (FW-BIC) and the symmetry-protected BIC (SP-BIC). Mostly throughout the literature, PSHE shift has been enhanced for H-polarized light with only fewer studies carried out for the enhancement of PSHE shift for V-polarized light. The present structure, comprising periodic silicon steps on a silica substrate with an intercalated graphene layer, exhibits a PSHE shift of 20.83λ upon reflection of V-polarized light at 8.7°. Tuning the unit cell's filling factor generates high Q-factor of 10<sup>4</sup> through the merging of BICs. Additionally, the influence of graphene's Fermi energy (Ef) on the PSHE shift is analyzed, demonstrating a sensitivity of 0.5 nm/eV. A theoretical framework is provided, showing that the Jones matrix for circularly polarized light aligns with the Pauli spin matrix, offering deeper insight into the spin-optical interaction.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"596 ","pages":"Article 132486"},"PeriodicalIF":2.5,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145158606","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