Infrared Physics & Technology最新文献_第8页

A simple and stable sub-picometer level 2.8 μm all-solid-state single-longitudinal mode Er:CaF2 laser 一种简单稳定的亚皮米级2.8 μm全固态单纵模Er:CaF2激光器

IF 3.4 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2025-08-24 DOI: 10.1016/j.infrared.2025.106099

Mengyu Zong , Mingyang Zheng , Jingjing Liu , Jie Liu , Liangbi Su

引用次数: 0

Multi-gas sensor system with customized dynamic ranges based on off-axis integrated cavity output spectroscopic for on-situ monitoring of carbon emissions in power plants 基于离轴集成腔输出光谱自定义动态范围的多气体传感器系统，用于电厂碳排放现场监测

IF 3.4 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2025-08-23 DOI: 10.1016/j.infrared.2025.106103

Jianing Wang , Zhen Li , Pengbo Li , Guanyu Lin , Zhibin Ban , Xiaogang Yan

{"title":"Multi-gas sensor system with customized dynamic ranges based on off-axis integrated cavity output spectroscopic for on-situ monitoring of carbon emissions in power plants","authors":"Jianing Wang , Zhen Li , Pengbo Li , Guanyu Lin , Zhibin Ban , Xiaogang Yan","doi":"10.1016/j.infrared.2025.106103","DOIUrl":"10.1016/j.infrared.2025.106103","url":null,"abstract":"<div><div>A near-infrared (NIR) multi-gas sensor with customized dynamic measurement ranges has been developed for simultaneous detection of methane (CH4), carbon monoxide (CO) and carbon dioxide (CO<sub>2</sub>) discharged from coal-fired power plant. Industrial gas emission commonly contains a variety of gas components with significantly varying concentration, which necessitates a challenge in simultaneously ensuring sensor precision, response time, and cost-effectiveness. Therefore, a segmented coating integrated cavity optomechanical structure was design and implemented to provide customized absorption optical length in the selected central wavelength with single integrated cavity. Simultaneously, high-precision linear detection with rapid response has been achieved for CO<sub>2</sub> at the percentage range level, as well as for CH<sub>4</sub> and CO at the parts per million (ppm) level. Allan deviation analysis indicates that detection sensitivity of 0.297 ppm for CH<sub>4</sub>, 0.336 ppm for CO and 0.6 % for CO<sub>2</sub> was achieved with a 1 s average time, which can be further improved with the optimal integration time. In addition, to accurately achieve the temporal concentration changing of target gas components, an innovative side-vented cavity configuration was designed and implemented. With a flow field optimization design, an obvious reduction in recirculation zones decreases the response time to 6.75 s. On-site measurement in power plant was carried out and the real-time trace CH<sub>4</sub>, CO and CO<sub>2</sub> were performed to demonstrate the long-term stability of the sensor system. Overall, the innovative cavity structure and optical path developed in this study simultaneously addresses practical requirements in field applications, including response time, multi-gas detection capability, and compatible detection ranges.</div></div>","PeriodicalId":13549,"journal":{"name":"Infrared Physics & Technology","volume":"151 ","pages":"Article 106103"},"PeriodicalIF":3.4,"publicationDate":"2025-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144895831","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

Processing of PTFE films using a short-pulse CO2 laser with flat-top and doughnut beams 使用平顶和甜甜圈光束的短脉冲CO2激光器加工PTFE薄膜

IF 3.4 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2025-08-22 DOI: 10.1016/j.infrared.2025.106100

Kazuyuki Uno, Katsunori Negishi

{"title":"Processing of PTFE films using a short-pulse CO2 laser with flat-top and doughnut beams","authors":"Kazuyuki Uno, Katsunori Negishi","doi":"10.1016/j.infrared.2025.106100","DOIUrl":"10.1016/j.infrared.2025.106100","url":null,"abstract":"<div><div>Polytetrafluoroethylene (PTFE) poses challenges for laser processing due to its optical properties, including reflectance, transmittance, and absorbance. PTFE exhibits strong absorption in specific wavelength ranges of 150 to 170 nm, 7.8 to 8.9 μm, 15.2 to 16.3 μm, and 17.8 to 20.3 μm, while its absorbance in other wavelength ranges is significantly lower. The wavelength of a CO<sub>2</sub> laser, 10.6 μm, lies at the edge of one absorption band, where the reflectance, transmittance and absorbance of a 200-μm-thick PTFE film are approximately 4 %, 36 % and 60 %, respectively. Despite these characteristics, PTFE processing is feasible using a CO<sub>2</sub> laser. In this study, we investigated the drilling and cutting characteristics of 200-μm-thick PTFE films using a short-pulse CO<sub>2</sub> laser with either a flat-top or doughnut beam. Clean processing, free from the attachment of decomposition products, was achieved in both drilling and cutting. Furthermore, by adjusting the beam shape and the focal offset, defined as the distance between the focal plane and the sample surface, we successfully controlled the angle between the surface and the sidewall in through-hole drilling.</div></div>","PeriodicalId":13549,"journal":{"name":"Infrared Physics & Technology","volume":"151 ","pages":"Article 106100"},"PeriodicalIF":3.4,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144895830","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

Modulation of output power and repetition rate in 1.5 μm passively Q-switched self-optical parametric oscillator by pulsed pumping 脉冲抽运调制1.5 μm被动调q自光参量振荡器输出功率和重复频率

IF 3.4 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2025-08-22 DOI: 10.1016/j.infrared.2025.106097

Liwan Wu, Rui Zhao, Chengfeng Liu, Xiaohua Xu, Meiyu Wang, Chunyu Hou, Hang Liu, Yongji Yu

{"title":"Modulation of output power and repetition rate in 1.5 μm passively Q-switched self-optical parametric oscillator by pulsed pumping","authors":"Liwan Wu, Rui Zhao, Chengfeng Liu, Xiaohua Xu, Meiyu Wang, Chunyu Hou, Hang Liu, Yongji Yu","doi":"10.1016/j.infrared.2025.106097","DOIUrl":"10.1016/j.infrared.2025.106097","url":null,"abstract":"<div><div>A compact 1.5 μm self-optical parametric oscillator (SOPO) was proposed, which utilized a pulsed laser diode (LD) to pump Nd:MgO:PPLN crystals. The rate equation of pulsed-pumped 1.5 μm passively Q-switched SOPO was established. The variations in pulse width and repetition rate were simulated under different initial transmittances and duty cycles. In the experiment, the output power and repetition rate were modulated by adjusting the timing of the pulse pump and replacing Cr<sup>4+</sup>:YAG with different initial transmittance. Finally, with a modulation duty cycle of 30 % and setting the Cr<sup>4+</sup>:YAG initial transmittance to 93 %, we achieved an average output power of 2.60 W, a repetition rate at 26.14 kHz, and a single pulse width of 14.97 ns for the 1512 nm signal light, with an optical-to-optical conversion efficiency of 7.2 %, the beam quality factor was <span><math><msubsup><mi>M</mi><mrow><mi>x</mi></mrow><mn>2</mn></msubsup></math></span> = 2.82, <span><math><mrow><msubsup><mi>M</mi><mrow><mi>y</mi></mrow><mn>2</mn></msubsup><mo>=</mo><mn>2.67</mn></mrow></math></span>. The experimental results demonstrated that the integration of pulse pumping technology with passive Q-switching not only ensured laser compactness but also enabled power and repetition rate modulation, ultimately realizing a miniaturized 1.5 μm SOPO with high power and high repetition rate characteristics.</div></div>","PeriodicalId":13549,"journal":{"name":"Infrared Physics & Technology","volume":"151 ","pages":"Article 106097"},"PeriodicalIF":3.4,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144895316","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

Robust nonlinear optical modulation based on niobium pentoxide in mid-infrared region 中红外区基于五氧化二铌的鲁棒非线性光调制

IF 3.4 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2025-08-22 DOI: 10.1016/j.infrared.2025.106093

Jie Li, Jing Huang

引用次数: 0

ECAFusion: Infrared and visible image fusion via edge-preserving and cross-modal attention mechanism ECAFusion：红外和可见光图像融合，通过边缘保持和跨模态注意机制

IF 3.4 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2025-08-21 DOI: 10.1016/j.infrared.2025.106085

Jiulong Peng, Wei Zhang, Yingli Hou, Hai Yu, Zhiliang Zhu

{"title":"ECAFusion: Infrared and visible image fusion via edge-preserving and cross-modal attention mechanism","authors":"Jiulong Peng, Wei Zhang, Yingli Hou, Hai Yu, Zhiliang Zhu","doi":"10.1016/j.infrared.2025.106085","DOIUrl":"10.1016/j.infrared.2025.106085","url":null,"abstract":"<div><div>Infrared and visible image fusion (IVIF) strives to integrate detailed textures with clear thermal objects, thus obtaining an information-rich image to enhance the performance of downstream tasks. However, existing image fusion networks generally overlook critical information, which includes edge details, and fail to facilitate effective cross-modal information interaction when extracting features across modalities. As a result, the fused outputs often fall short of expectations. To overcome this challenge, we propose ECAFusion, a dual-branch fusion model for IVIF that incorporates an edge-preserving and cross-modal attention mechanism. Specifically, we design a Sobel convolution block (SCB) by applying the Sobel operator to preserve edge details. Additionally, a cross-modal interaction module (CMIM) is proposed to capture complementary information from different modalities. Finally, we employ a well-designed feature fusion module to combine these features from different modalities. Comprehensive experiments show that ECAFusion surpasses the most advanced fusion methods. Moreover, our model significantly improves the performance of high-level vision tasks.</div></div>","PeriodicalId":13549,"journal":{"name":"Infrared Physics & Technology","volume":"151 ","pages":"Article 106085"},"PeriodicalIF":3.4,"publicationDate":"2025-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144895317","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

Heat distribution analysis of LD end-pumped YAG/Er:YAG/YAG composite laser ceramics LD端泵浦YAG/Er:YAG/YAG复合激光陶瓷的热分布分析

IF 3.4 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2025-08-21 DOI: 10.1016/j.infrared.2025.106095

Cheng Wan , Junwei Zhang , Zhen He , Hui Lin , Yuchong Ding , Dawei Zhang

引用次数: 0

NUDTNet: Physics informed Non-uniform Distinctive Targeting Network for infrared small target detection 用于红外小目标探测的物理通知非均匀特征瞄准网络

IF 3.4 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2025-08-21 DOI: 10.1016/j.infrared.2025.106082

Wenhao Wu , Youlin Gu , Chen Lei , Fanhao Meng , Xi Zhang , Yihua Hu

{"title":"NUDTNet: Physics informed Non-uniform Distinctive Targeting Network for infrared small target detection","authors":"Wenhao Wu , Youlin Gu , Chen Lei , Fanhao Meng , Xi Zhang , Yihua Hu","doi":"10.1016/j.infrared.2025.106082","DOIUrl":"10.1016/j.infrared.2025.106082","url":null,"abstract":"<div><div>Infrared small target detection models face a fundamental challenge: their CNN-based backbone applies spatially invariant processing to inherently heterogeneous scenes: targets manifest as concentrated Gaussian-like energy distributions while backgrounds exhibit diffuse patterns from atmospheric scattering. This architectural mismatch causes progressive target feature dilution and degraded localization accuracy in deep networks. We propose Gaussian Recalibration Attention Blocks (GRABs), a physics-informed adaptive convolution framework that transforms static kernels into content-aware operators. GRABs comprise three synergistic components: (1) Feature Decomposition (FD) that separates target and background features through spatially-adaptive bandpass operations, (2) Gaussian Spatial Parameter Predictor (GSPP) that reconstitutes standard convolutions as position-dependent matched filters, and (3) Object Perception Attention (OPA) that provides spatial control signals including probabilistic target presence maps, sub-pixel centroid localization, and anisotropic shape descriptors. We integrate GRABs into the Non-uniform Distinctive Targeting Network (NUDTNet) as the feature extraction backbone, complemented by a Cross-layer Relation Transformer (CLRT) for multi-scale feature fusion. Extensive experiments demonstrate that NUDTNet achieves better performance on NUDT-SIRST, NUAA-SIRST, and IRSTD-1K datasets, validating the effectiveness of incorporating physical imaging principles into neural architectures for infrared small target detection.</div></div>","PeriodicalId":13549,"journal":{"name":"Infrared Physics & Technology","volume":"151 ","pages":"Article 106082"},"PeriodicalIF":3.4,"publicationDate":"2025-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144908430","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

Fusion of infrared and visible images: A novel approach using fuzzy PID control and least-squares detail enhancement 红外与可见光图像融合：一种采用模糊PID控制和最小二乘细节增强的新方法

IF 3.4 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2025-08-20 DOI: 10.1016/j.infrared.2025.106059

Jiangrong Lin, Chentong Guo, Lei Deng, Mingli Dong, Lianqing Zhu

{"title":"Fusion of infrared and visible images: A novel approach using fuzzy PID control and least-squares detail enhancement","authors":"Jiangrong Lin, Chentong Guo, Lei Deng, Mingli Dong, Lianqing Zhu","doi":"10.1016/j.infrared.2025.106059","DOIUrl":"10.1016/j.infrared.2025.106059","url":null,"abstract":"<div><div>The aim of fusing infrared and visible imagery is to enhance the informational content of individual images, enhancing their comprehensiveness and usefulness. The fused images of existing algorithms are easily biased towards one of the source images after fusion with a specific ratio. To overcome this challenge, this study proposes a novel fusion method based on fuzzy PID control system and least squares optimization(WLS) for detail enhancement. Firstly, the contrast information of the source image is measured, and the contrast difference is divided into two categories, and the two types of images choose different fusion strategies. The measurement results adaptively adjust the output of the fuzzy PID control system through feedback, so as to adjust the fusion weights of the classification and source images, and obtain the basic image after stabilization. In addition, four filters are used to extract details of source images, and the details are enhanced by WLS optimization. The final fused image obtained by combining the two can capture infrared and visible information to a greater extent. Experiments show that our method has good visual effects in dealing with boundary artifacts, and has significant contrast and rich texture.</div></div>","PeriodicalId":13549,"journal":{"name":"Infrared Physics & Technology","volume":"151 ","pages":"Article 106059"},"PeriodicalIF":3.4,"publicationDate":"2025-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144893590","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 340-GHz frequency multiplier chain based on GaN monolithic integrated circuit technology 基于GaN单片集成电路技术的340-GHz倍频链

IF 3.4 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2025-08-18 DOI: 10.1016/j.infrared.2025.106091

Yiyuan Zheng , Kai Zhang , Kunpeng Dai , Huaixin Guo , Yuechan Kong , Tangsheng Chen

{"title":"A 340-GHz frequency multiplier chain based on GaN monolithic integrated circuit technology","authors":"Yiyuan Zheng , Kai Zhang , Kunpeng Dai , Huaixin Guo , Yuechan Kong , Tangsheng Chen","doi":"10.1016/j.infrared.2025.106091","DOIUrl":"10.1016/j.infrared.2025.106091","url":null,"abstract":"<div><div>This article presents a high-power 340-GHz frequency multiplier chain using a × 2 × 2 multiplication architecture with two doublers based on GaN monolithic integrated circuit technology. To enhance the power-handling capability, multiple-anodes GaN Schottky barrier diodes with enhanced thermal stability and interfacial stability are employed in the designs. The GaN-based monolithic integrated circuit topology with a high-thermal-conductivity SiC substrate is adopted to address the thermal management under high-power conditions. The bias circuits with controllable transmission zeros are introduced to realize the operation adjustment and dynamic monitoring, while maintaining the conversion efficiency. Circuit analysis, parametric study and multiphysics simulation have been performed to illustrate the mechanism. The prototypes of the proposed 170-GHz and 340-GHz doublers have been implemented and tested, exhibiting a measured peak continuous-wave (CW) output power of 411 mW at 174 GHz and 82.2 mW at 338 GHz, respectively. The measured CW output power exceeds 50 mW across 320–350 GHz range, which is the highest reported performance for the 340-GHz frequency multipliers without power-combining techniques.</div></div>","PeriodicalId":13549,"journal":{"name":"Infrared Physics & Technology","volume":"151 ","pages":"Article 106091"},"PeriodicalIF":3.4,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144867149","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