Infrared Physics & Technology最新文献_第8页

Investigation of signal coupling circuit for NbN-based SIS mixer operated at 650 GHz 基于氮化铌的 SIS 混频器在 650 千兆赫频率下工作的信号耦合电路研究

IF 3.1 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2024-09-15 DOI: 10.1016/j.infrared.2024.105560

Lianhao He, Fangting Lin, Xiaoyong He

引用次数: 0

Generation of noise-like pulses in a linear-cavity Tm fiber mode-locked laser based on FMF saturable absorber 在基于 FMF 可饱和吸收器的线性腔 Tm 光纤锁模激光器中产生类噪声脉冲

IF 3.1 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2024-09-15 DOI: 10.1016/j.infrared.2024.105561

Feng Huang, Huanhuan Li, Longwei Luo, Fulin Lian, Can Li, Junjie Zhang, Kunyang Wang, Shiqing Xu

{"title":"Generation of noise-like pulses in a linear-cavity Tm fiber mode-locked laser based on FMF saturable absorber","authors":"Feng Huang, Huanhuan Li, Longwei Luo, Fulin Lian, Can Li, Junjie Zhang, Kunyang Wang, Shiqing Xu","doi":"10.1016/j.infrared.2024.105561","DOIUrl":"10.1016/j.infrared.2024.105561","url":null,"abstract":"<div><p>As a real saturable absorber (SA) based on the nonlinear multimode interference (NL-MMI) effect, the devices based on the few-mode fiber possess numerous exciting characteristics due to their all-fiber structure, straightforward manufacturing process. In this paper, by employing a SA with the SMF-FMF-SMF structure in a linear cavity, we demonstrate a stable mode-locked Tm-doped fiber laser. At the pump power of 1 W, a single noise-like pulse (NLP) with a pedestal pulse duration of 28 ps and coherent peak width of 0.77 ps is generated at a central wavelength of 1940 nm with a 3 dB bandwidth of 10.51 nm. The stable noise-like pulse can be sustained from the lasing pump threshold up to the maximum pump power of 2.2 W without experiencing pulse splitting. The experiment results in a peak average output power of 116 mW, along with a corresponding maximum pulse energy of 24.73 nJ at a repetition frequency of 4.69 MHz. The high stability of our fiber laser is confirmed by the signal-to-Noise Ratio (SNR) of 63 dB, and its enduring stability is additionally validated over an 8-hour period. The experimental findings suggest that the SMF-FMF-SMF structure has significant potential in the simple and robust all-fiber mode-locked lasers operating in the noise-like pulse regime.</p></div>","PeriodicalId":13549,"journal":{"name":"Infrared Physics & Technology","volume":"142 ","pages":"Article 105561"},"PeriodicalIF":3.1,"publicationDate":"2024-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142239475","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

Infrared temperature distribution characteristics and state assessment method of sandstone under tension and compression stress 砂岩在拉应力和压应力作用下的红外温度分布特征及状态评估方法

IF 3.1 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2024-09-14 DOI: 10.1016/j.infrared.2024.105549

Changfeng Li , Chunlu Lan , Baokun Zhou , Chaoyang Zhu , Qiru Sui , Xiaolin Hou , Chunlai Wang

{"title":"Infrared temperature distribution characteristics and state assessment method of sandstone under tension and compression stress","authors":"Changfeng Li , Chunlu Lan , Baokun Zhou , Chaoyang Zhu , Qiru Sui , Xiaolin Hou , Chunlai Wang","doi":"10.1016/j.infrared.2024.105549","DOIUrl":"10.1016/j.infrared.2024.105549","url":null,"abstract":"<div><p>Abnormalities in infrared radiation temperature (IRT) often accompany the loading In this investigation, stress experiments and splitting tests were conducted on sandstone to investigate the IRT characteristics of sandstone under various loading conditions. The results shows that the Maximum Infrared Radiation Temperature (MAXIRT) increases by up to 5 °C, while in splitting tests, the minimum infrared radiation temperature (MINIRT) decreases by approximately 1.5 °C. Compared to the average infrared radiation temperature (AIRT), MAXIRT is more sensitive to compressive stress, whereas (MINIRT) is more responsive to tensile stress. The correlation between IRT indicators and stress were further analyzed. The findings reveal a positive correlation between IRT and compressive stress. At low stress levels, the correlation coefficient fluctuates between −0.4 and 0.6, generally showing low correlation. As stress increases, the correlation coefficient rises, reaching above 0.8, indicating a high correlation. Tensile stress exhibits a negative correlation, with a consistent trend. Additionally, a statistical analysis of the frequency distribution of IRT under different stress conditions was conducted, followed by hypothesis testing. The results demonstrate that the probability distribution of IRT during loading follows a skewed normal distribution. The changes in skewness can be divided into three stages: initial fluctuation, stable variation, and abrupt failure. Under compressive stress, a right-skewed distribution is observed, with skewness exceeding 3.5 before fracture and reaching above 10 near fracture. Under tensile stress, a left-skewed distribution is noted, with skewness reaching −4.5 near fracture. These findings contribute to the assessment of rock stress states and provide early warning information for predicting rock failure.</p></div>","PeriodicalId":13549,"journal":{"name":"Infrared Physics & Technology","volume":"142 ","pages":"Article 105549"},"PeriodicalIF":3.1,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142239478","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

Pulse-state switchable mode-locked Tm-doped fiber laser based on linear-cavity nonlinear polarization rotation 基于线性腔非线性偏振旋转的脉冲状态可切换模式锁定掺铥光纤激光器

IF 3.1 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2024-09-13 DOI: 10.1016/j.infrared.2024.105550

Jie He , Juguang Hu , Deqin Ouyang , Ziya Tang , Xing Luo , Jiachen Wang , Fanlong Dong , Peiguang Yan , Jinzhang Wang , Chunyu Guo , Shuangchen Ruan

引用次数: 0

Research on model transfer strategies based on the fusion of NIR-MIR spectral data 基于近红外-红外光谱数据融合的模型转移策略研究

IF 3.1 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2024-09-12 DOI: 10.1016/j.infrared.2024.105545

Nan Liu , Cuiling Liu , Lanzhen Chen , Jiabin Yu , Xiaorong Sun , Shanzhe Zhang , Jingzhu Wu

{"title":"Research on model transfer strategies based on the fusion of NIR-MIR spectral data","authors":"Nan Liu , Cuiling Liu , Lanzhen Chen , Jiabin Yu , Xiaorong Sun , Shanzhe Zhang , Jingzhu Wu","doi":"10.1016/j.infrared.2024.105545","DOIUrl":"10.1016/j.infrared.2024.105545","url":null,"abstract":"<div><p>This study investigated the impact of different data fusion strategies on the performance of soluble solids content (SSC) prediction models based on near-infrared and mid-infrared spectroscopic techniques. In the data-level fusion approach, we applied standard normal variate and multiplicative scatter correction for pre-processing the NIR and MIR data. For the feature-level fusion, we utilized successive projections algorithm and competitive adaptive reweighted sampling to select informative wavelengths, and then applied direct orthogonal projection (DOP) for model transfer. The study employed a dataset of 150 honey samples to evaluate the impact of different data fusion strategies on model performance. To effectively evaluate model performance, we utilized the coefficient of R<sup>2</sup> and RMSEP as evaluation metrics. By comparing the results of data-level fusion, feature-level fusion and single-spectrum model transfer, the results showed that spectral data fusion improved the model transfer performance compared to the single-spectrum approach, with feature-level fusion exhibiting the most significant advantages. The effective variable selection techniques in feature-level fusion successfully removed a substantial amount of interfering data and significantly reduced noise influence, thereby improving the model accuracy. Specifically, the use of feature-level fusion improved the predictive model’s R<sup>2</sup> from 0.319 to 0.878 and reduced the RMSEP from 1.974 to 0.613°Brix, demonstrating the significant advantages of this approach in enhancing model transfer performance. The research findings provide important reference and theoretical support for future studies in the field of food quality assessment and other near-infrared spectroscopic data applications. This not only validates the effectiveness of the feature-level fusion approach, but also lays the foundation for establishing efficient and reliable predictive models.</p></div>","PeriodicalId":13549,"journal":{"name":"Infrared Physics & Technology","volume":"142 ","pages":"Article 105545"},"PeriodicalIF":3.1,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142173193","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

Sensing performance comparison for temperature and liquid level sensor based on uniform and step-Etched microfiber TFBG 基于均匀和阶跃蚀刻超细纤维 TFBG 的温度和液位传感器的传感性能比较

IF 3.1 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2024-09-10 DOI: 10.1016/j.infrared.2024.105554

Xue Li , Qian Zhang , Jin Li

引用次数: 0

6-ns level passively Q-switched Nd:KNaY (WO4)2 laser at 1.07 µm 1.07 微米波长的 6-ns 级被动 Q 开关 Nd:KNaY (WO4)2 激光器

IF 3.1 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2024-09-10 DOI: 10.1016/j.infrared.2024.105553

Wenxin Li, Jingjing Liu, Xiaoyue Feng, Jiahao Dong, Yanan Li, Mingchao Shao, Jie Liu, Danhua Liu

引用次数: 0

High repetition-Rate laser diode side-Pumped burst-mode Nd:YAG laser with enhanced output pulse uniformity 输出脉冲均匀性更强的高重复率激光二极管侧泵浦猝发模式 Nd:YAG 激光器

IF 3.1 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2024-09-08 DOI: 10.1016/j.infrared.2024.105551

Renpeng Yan , Haobo Xu , Yugang Jiang , Wei Wang , Rongwei Fan , Deying Chen , Xudong Li

引用次数: 0

A fast deployable model for crack identification with laser thermography testing 利用激光热成像测试识别裂纹的快速部署模型

IF 3.1 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2024-09-07 DOI: 10.1016/j.infrared.2024.105552

Zhenyu Zhang, Cuixiang Pei, Zhi Wang, Zhenmao Chen

引用次数: 0

GAN-HA: A generative adversarial network with a novel heterogeneous dual-discriminator network and a new attention-based fusion strategy for infrared and visible image fusion GAN-HA：带有新型异构双判别器网络的生成式对抗网络和基于注意力的红外与可见光图像融合新策略

IF 3.1 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2024-09-03 DOI: 10.1016/j.infrared.2024.105548

Guosheng Lu, Zile Fang, Jiaju Tian, Haowen Huang, Yuelong Xu, Zhuolin Han, Yaoming Kang, Can Feng, Zhigang Zhao

{"title":"GAN-HA: A generative adversarial network with a novel heterogeneous dual-discriminator network and a new attention-based fusion strategy for infrared and visible image fusion","authors":"Guosheng Lu, Zile Fang, Jiaju Tian, Haowen Huang, Yuelong Xu, Zhuolin Han, Yaoming Kang, Can Feng, Zhigang Zhao","doi":"10.1016/j.infrared.2024.105548","DOIUrl":"10.1016/j.infrared.2024.105548","url":null,"abstract":"<div><p>Infrared and visible image fusion (IVIF) aims to preserve thermal radiation information from infrared images while integrating texture details from visible images. Thermal radiation information is mainly expressed through image intensities, while texture details are typically expressed through image gradients. However, existing dual-discriminator generative adversarial networks (GANs) often rely on two structurally identical discriminators for learning, which do not fully account for the distinct learning needs of infrared and visible image information. To this end, this paper proposes a novel GAN with a heterogeneous dual-discriminator network and an attention-based fusion strategy (GAN-HA). Specifically, recognizing the intrinsic differences between infrared and visible images, we propose, for the first time, a novel heterogeneous dual-discriminator network to simultaneously capture thermal radiation information and texture details. The two discriminators in this network are structurally different, including a salient discriminator for infrared images and a detailed discriminator for visible images. They are able to learn rich image intensity information and image gradient information, respectively. In addition, a new attention-based fusion strategy is designed in the generator to appropriately emphasize the learned information from different source images, thereby improving the information representation ability of the fusion result. In this way, the fused images generated by GAN-HA can more effectively maintain both the salience of thermal targets and the sharpness of textures. Extensive experiments on various public datasets demonstrate the superiority of GAN-HA over other state-of-the-art (SOTA) algorithms while showcasing its higher potential for practical applications.</p></div>","PeriodicalId":13549,"journal":{"name":"Infrared Physics & Technology","volume":"142 ","pages":"Article 105548"},"PeriodicalIF":3.1,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142162941","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