Optics Communications最新文献_第10页

Integrated design of temperature and distance focusing for MWIR optical imaging system MWIR光学成像系统温度与距离聚焦集成设计

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-06-04 DOI: 10.1016/j.optcom.2025.132074

Han Bing , Ma Hongtao , Fu Yuegang , Xu Honggang , Li Xu , Zhang Mingliang

{"title":"Integrated design of temperature and distance focusing for MWIR optical imaging system","authors":"Han Bing , Ma Hongtao , Fu Yuegang , Xu Honggang , Li Xu , Zhang Mingliang","doi":"10.1016/j.optcom.2025.132074","DOIUrl":"10.1016/j.optcom.2025.132074","url":null,"abstract":"<div><div>To address the urgent demand for mid-wave infrared (MWIR) optical imaging systems in the military field, a MWIR optical imaging system has been designed based on a domestic large-format mid-wave cooling infrared detector with a resolution of 640 × 512 pixels and a pixel size of 15 μm. The system operates within a wavelength range of 3.7 μm–4.8 μm and features an F-number of 2 and a focal length of 900 mm. The system adopts a secondary imaging structure to obtain 100 % cold shield efficiency, effectively eliminating aberrations and comprehensively considers temperature focusing and distance focusing, realizing the integrated design of temperature and distance focusing in the MWIR optical imaging system. The results indicate that when the field of view (FOV) ω ≤ 0.7ω<sub>max</sub>, modulation transfer function (MTF) ≥ 0.6@17lp/mm, and when ω > 0.7ω<sub>max</sub>, MTF≥ 0.55@17lp/mm. Within an environmental temperature range of 0 °C–40 °C, the image quality remains stable by fine-tuning the distance between the 3/4 mirror and the secondary mirror. Similarly, when the target distance varies from infinity to 10 km, the system can also maintain clear imaging by adjusting the distance of 3/4 mirror relative to the secondary mirror. The system has the advantages of compact structure, long focal length, high resolution, and high imaging quality, which can meet the requirements of the new generation airborne MWIR optical imaging system.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"591 ","pages":"Article 132074"},"PeriodicalIF":2.2,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144254901","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

Dual-wavelength operation in a dual-cavity Nd:YVO4 laser 双腔Nd:YVO4激光器的双波长工作

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-06-04 DOI: 10.1016/j.optcom.2025.132073

E.K. Park , I.C. Park , J.W. Kim

引用次数: 0

Mechanical sharing dual-comb fiber laser with 200 MHz repetition-rate 200 MHz重复频率的机械共享双梳光纤激光器

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-06-04 DOI: 10.1016/j.optcom.2025.132078

Yiqiu Liang , Yao Li , Haonan Gong , Rui Guo , Handong Yao , Zehui Cui , Xiaorong Gu , Youwen Liu

引用次数: 0

Efficient electro-optically Q-switched Tm:Lu2O3 ceramic laser with resonantly pumping scheme 具有共振泵浦方案的高效电光调q Tm:Lu2O3陶瓷激光器

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-06-04 DOI: 10.1016/j.optcom.2025.132072

Wensheng Zhang , Linjun Li , Hong Liang

引用次数: 0

Monolithic dual-wavelength semiconductor laser based on varying ridge waveguide widths with passive surface DBR defined by UV lithography 基于可变脊波导宽度的单片双波长半导体激光器，由UV光刻技术定义无源表面DBR

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-06-04 DOI: 10.1016/j.optcom.2025.132086

Yuxin Yue , Yonggang Zou , Jie Fan , Xiyao Fu , Naiyu Zhang , Yujun Guo , Yingmin Song , Zhuoer Huang , Bilin Ye , Xiaohui Ma , Xiaozhuo Wang , Biyao Cheng

{"title":"Monolithic dual-wavelength semiconductor laser based on varying ridge waveguide widths with passive surface DBR defined by UV lithography","authors":"Yuxin Yue , Yonggang Zou , Jie Fan , Xiyao Fu , Naiyu Zhang , Yujun Guo , Yingmin Song , Zhuoer Huang , Bilin Ye , Xiaohui Ma , Xiaozhuo Wang , Biyao Cheng","doi":"10.1016/j.optcom.2025.132086","DOIUrl":"10.1016/j.optcom.2025.132086","url":null,"abstract":"<div><div>Dual-wavelength lasers are utilized in difference frequency terahertz generation and shifted excitation Raman difference spectroscopy. Semiconductor lasers can be used as an excitation light source for the above applications due to their small size, light weight and high conversion efficiency. A dual-wavelength semiconductor laser based on varying ridge waveguide widths with passive distributed Bragg reflector (DBR) gratings is demonstrated. The fabricated device exhibits a threshold current of approximately 30 mA at 15 °C. Under certain injection currents, stable dual-wavelength operation is observed, with lasing wavelengths centered at 796.8 nm and 797.4 nm, respectively, yielding a wavelength spacing of 0.6 nm. Furthermore, the proposed dual-wavelength laser possesses advantages including low threshold, excellent stability and short wavelength spacing. The manufacturing process of this device utilizes ultraviolet lithography, eliminating the need for secondary growth steps, thereby demonstrating immense market potential and competitiveness in the realm of commercial applications.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"591 ","pages":"Article 132086"},"PeriodicalIF":2.2,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144231756","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

Optimal angle as a key enabler for efficient electromagnetically induced absorption via laser intensity tuning in a Ξ−V type atomic system 在Ξ−V型原子体系中，通过激光强度调谐，最佳角度是实现高效电磁诱导吸收的关键因素

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-06-04 DOI: 10.1016/j.optcom.2025.132015

Xixi Bai, Xiang-an Yan, Yang Liu, Ziyi Wu, Jiale Song, Xiaoxiang Han

{"title":"Optimal angle as a key enabler for efficient electromagnetically induced absorption via laser intensity tuning in a Ξ−V type atomic system","authors":"Xixi Bai, Xiang-an Yan, Yang Liu, Ziyi Wu, Jiale Song, Xiaoxiang Han","doi":"10.1016/j.optcom.2025.132015","DOIUrl":"10.1016/j.optcom.2025.132015","url":null,"abstract":"<div><div>We report the key role of the control light’s incident angle in achieving efficient electromagnetically induced absorption (EIA) in the <span><math><mrow><mn>5</mn><msub><mrow><mi>S</mi></mrow><mrow><mn>1</mn><mo>/</mo><mn>2</mn></mrow></msub><mo>−</mo><mn>5</mn><msub><mrow><mi>P</mi></mrow><mrow><mn>3</mn><mo>/</mo><mn>2</mn></mrow></msub><mo>−</mo><mn>5</mn><msub><mrow><mi>D</mi></mrow><mrow><mn>5</mn><mo>/</mo><mn>2</mn></mrow></msub></mrow></math></span> transition of the <sup>87</sup>Rb atom in a <span><math><mrow><mi>Ξ</mi><mo>−</mo><mi>V</mi></mrow></math></span> type atomic system. By precisely adjusting the control light’s incident angle to 1.7°and subsequently tuning its power, a significant conversion from electromagnetically induced transparency (EIT) to EIA is achieved. Experimental findings reveal that the saturation effect is effectively suppressed at this angle, while constructive interference between dressed states generated by the three-photon coherence greatly improves the EIA signal contrast. Theoretical calculations, employing a dressed perturbation chain approach for a Doppler-broadened four-level atomic model, corroborate our experimental observations. Furthermore, with optimized parameter settings, we observe three EIA signals across various hyperfine transitions concurrently at different detuning frequencies. This work provides a new way for efficient coherent modulation in applications such as precision measurement and optical storage.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"591 ","pages":"Article 132015"},"PeriodicalIF":2.2,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144241206","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

Topological insulator-based wideband infrared absorber: Optimization and behaviour prediction using machine learning models 基于拓扑绝缘体的宽带红外吸收体：使用机器学习模型的优化和行为预测

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-06-04 DOI: 10.1016/j.optcom.2025.132077

Vishal Sorathiya , Abdullah G. Alharbi , Amar Y. Jaffar , Ayman Alharbi , Bhasha Anjaria

{"title":"Topological insulator-based wideband infrared absorber: Optimization and behaviour prediction using machine learning models","authors":"Vishal Sorathiya , Abdullah G. Alharbi , Amar Y. Jaffar , Ayman Alharbi , Bhasha Anjaria","doi":"10.1016/j.optcom.2025.132077","DOIUrl":"10.1016/j.optcom.2025.132077","url":null,"abstract":"<div><div>A numerical investigation of the multi-layered perfect absorber structure for the wide band infrared spectrum is analyzed using the wide wavelength spectrum. The proposed structure is formed with the topological insulator, metal, and dioxide layers and the different resonator arrays. This structure is investigated over the wavelength spectrum of 0.2 μm–1.6 μm of the spectrum. Different physical parameters have been identified to achieve the optimized results of the wideband absorption spectrum. The proposed absorber structure is investigated over the different incident conditions (TE/TM) modes with wide-angle values ranging from 0<sup>0</sup> to 80<sup>0</sup>. The proposed structure is polarisation non-sensitive up to 70<sup>0</sup> of the incident angle. The structure is also investigated for the different resonator arrays consisting of circular, squared and rectangular resonators. The effect of the different unit cells was also examined to identify the optimized size of the wideband absorber structure. The behaviour of the overall structure is predicated by the different machine learning models such as kNN, Random Forest, Neural Network, Gradient Boosting and AdaBoost. The machine learning parameters such as MSE, RMSE, MAE, MAPE, and R2 are compared to identify suitable models for accurately predicting the absorption spectrum. The R<sup>2</sup> value is the minimum on the Neural network of up to 0.83 and the maximum of up to 0.96 in all four other models. The scatter plots and these values can help identify the suitable model that generates the prediction of the absorption spectrum more accurately. The proposed results in this manuscript can be helpful for various sensing and quantum dot-based photonics applications.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"591 ","pages":"Article 132077"},"PeriodicalIF":2.2,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144241211","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

Talbot effects in Floquet synthetic mesh lattices Floquet合成网格晶格中的塔尔博特效应

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-06-03 DOI: 10.1016/j.optcom.2025.132061

Qinqin Zhang , Song Gao , Yuanmei Gao , Zengrun Wen

引用次数: 0

OAM and polarization switchable vector vortices generated in a Yb:YAG microchip laser Yb:YAG微芯片激光器中产生的OAM和偏振可切换矢量涡

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-06-03 DOI: 10.1016/j.optcom.2025.132068

Yuxiang Dong , Sibo Huang , Siyuan Liu , Xingyu Zhu

{"title":"OAM and polarization switchable vector vortices generated in a Yb:YAG microchip laser","authors":"Yuxiang Dong , Sibo Huang , Siyuan Liu , Xingyu Zhu","doi":"10.1016/j.optcom.2025.132068","DOIUrl":"10.1016/j.optcom.2025.132068","url":null,"abstract":"<div><div>Vector vortex beams (VVBs) are essential for applications in high-capacity optical communication, micromanipulation, quantum information processing, and material processing. However, it is a challenge to manipulate orbital angular momentum (OAM) and polarization for VVBs. Here, with annular beam pumping, VVBs with switchable OAM and polarization are obtained in a microchip laser constructing with a 0.8–mm thin Yb:YAG crystal. Radially polarized vortex beam and VVB with two OAM and polarization state spatially varying as <strong><em>E</em></strong><sub><strong><em>ϕ</em></strong></sub> sin(<em>ϕ</em>) + <strong><em>E</em></strong><sub><strong><em>r</em></strong></sub> cos(<em>ϕ</em>) have been obtained. The switch of the radially polairzed vortex beam to the VVB with two OAMs occurres when the input pump power (P<sub>in</sub>) reaches 5.2 W. Radially polarized vector beam with output power up to 0.5 W is obtained experimentally. The output power of VVB with two OAMs increases from 0.5 to 0.72 W as P<sub>in</sub> increases. VVBs with switchable OAM and polarization obtained in the microchip laser oscillate around 1030 nm. Stable four-longitudinal modes oscillate for VVB with two OAMs. High beam quality, high-power VVBs with switchable OAM and polarization generated in a compact microchip laser have potential applications on laser machining, high-resolution imaging and micromanipulation.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"591 ","pages":"Article 132068"},"PeriodicalIF":2.2,"publicationDate":"2025-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144221504","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 robust transform-domain LED-ID recognition method under imperfect camera exposure conditions 一种不完美相机曝光条件下稳健的变换域LED-ID识别方法

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-06-03 DOI: 10.1016/j.optcom.2025.131998

Yucheng Song, Shuoqiu Wang, Wei Ke

{"title":"A robust transform-domain LED-ID recognition method under imperfect camera exposure conditions","authors":"Yucheng Song, Shuoqiu Wang, Wei Ke","doi":"10.1016/j.optcom.2025.131998","DOIUrl":"10.1016/j.optcom.2025.131998","url":null,"abstract":"<div><div>Optical camera communication(OCC), leveraging light emitting diode(LED) and complementary metal oxide semiconductor(CMOS) cameras, is increasingly being used for indoor positioning. Recognition of LED-ID is one of the most critical steps in such methods. The exposure effect of CMOS cameras will decrease the stripe contrast when the LED frequency exceeds the exposure frequency. The traditional binary demodulation method is easily interfered with in this frequency band, which may lead to recognition failure. This article proposes a robust LED-ID recognition method that combines discrete cosine transform (DCT) and high pass filtering (HPF). The method utilizes phase resonance and cancellation in the transform domain to separate high-frequency information from low-frequency interference, successfully increasing the recognition frequency band by at least 2.5 times. At the same time, the camera sampling parameters and exposure effects on LED-ID recognition are analyzed to guide hardware selection for visible light positioning systems. The experimental results validated the recognition performance of the method in low-contrast situations and demonstrated its practicality and robustness.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"591 ","pages":"Article 131998"},"PeriodicalIF":2.2,"publicationDate":"2025-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144221421","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