Article
Optics
Kaixi Bi, Linyu Mei, Xiaoxue Bi, Yiqin Chen, Yaokai Niu, Zhiqiang Ji, Wenping Geng, Shuqi Han, Liya Niu, Xiujian Chou
Summary: With the use of electron beam irradiation, organic resist can be transformed into carbon-based micro-nano structures, allowing for the fabrication of high-resolution solid-carbon nanoarrays. Treatment with ammonia solution enhances the photoluminescence (PL) intensity of the samples. Furthermore, carbon-based nanostructures were fabricated on the surface of MoS2 film, leading to superposition state based on PL intensity and peak location.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Jianmin Li, Ping Jiang, Zhaoliang Gong, Chunming Wang, Shaoning Geng
Summary: This paper investigates the dynamics of underwater laser welding (ULW) and focuses on the forming characteristics of the welded joints. The study finds that wet ULW fails when the water depth exceeds a certain level. To minimize water interference, a self-designed coaxial nozzle is used. Additionally, the porosity of the welds is sensitive to welding parameters and can be reduced by adjusting the laser power, velocity, and shielding gas flow rate.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Linqing Li, Chengwei Yang, Zhuo Wang, Kun Xiao, Rui Min
Summary: In this study, a stretchable polymer optical fiber with a sandwich structure was proposed for sleep monitoring. The fiber improved the pressure sensitivity of the mattress and enabled the measurement of respiratory rate, heart rate, and body motion information.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Seongguk Bae, Youngdae Kim, Jinesung Jung, Keesam Shin, Chang-Min Suh, Sungho Jeong
Summary: The effectiveness of laser shock peening was examined for Inconel 738 low-carbon material, showing significant improvement in surface hardness and compressive residual stress, enhancing the fatigue strength at low temperatures. However, the effectiveness of laser shock peening diminished at elevated temperatures.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Mohammad Rezayat, Miguel Morales, Mahmoud Moradi, Antonio Mateo
Summary: Laser wobbling surface texturing (LWST) is a precise and non-contact method for customizing surface properties and creating patterns on various materials. This study investigates the effects of LWST on high-temperature corrosion in AISI 301LN stainless steel and finds that the wobbling frequency has a greater impact on surface roughness.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Tun-Yao Hung, David W. U. Chan, Ching-Wei Peng, Chi-Wai Chow, Hon Ki Tsang
Summary: We present the first experimental demonstration of a high-capacity short-reach optical communication link which utilizes LSTM and DNN to achieve 300 Gbit/s 8-level pulse amplitude modulation (PAM8) generated by a single microring modulator. The experimental results show that 300 Gbit/s and 270 Gbit/s PAM8 modulation can be achieved at back-to-back and after 1 km transmission respectively.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Chong Wang, Miaomiao Li, Jiahao Yang, Bingli Zhu, Jianghao Han, Wenbin Dang
Summary: This paper introduces the design of drive circuits using step recovery diodes and RF bipolar transistors to produce narrow pulse lasers, achieving the reduction of system size, power consumption and cost.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Ziqian Zhang, Liangyu Zhao, Chaorun Si, Yang Tian, Shilin Xu
Summary: A Hastelloy C276 coating was prepared on a martensitic stainless-steel substrate using laser melting deposition, resulting in a coating with high resistance to cavitation erosion. The coating exhibited a thick, progressively changing grain morphology from bottom to top, and the grains grew in a specific angle to the substrate plane. A compositional mixing zone was formed at the interface, forming a stable metallurgical bond. The coating showed a significantly improved hardness and enhanced resistance to cavitation erosion compared to the substrate.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Cui-Hong Li, Chao-Xiong He, Yuan-Yuan Ma, Jin-Chuan Wang, Ying Dong, Shao-Chong Zhu, Xiao-Wen Gao, Hui-Zhu Hu
Summary: In this paper, a non-contact optical measuring method for characterizing nanoparticles using optical tweezers is presented. The method relies on the optical polarization and scattering of nanoparticles, providing insights into both shape and size parameters. Experimental results show that the method can accurately measure the shape and size of nanoparticles, making it an effective tool for identifying and studying individual nanoparticles.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Yongchang Xu, Youzhao Zhang, Xiangwei Li, Yumei Zhong, Kaiqi Lin, Bokai Liao, Xingpeng Guo, Chao Yuan, Shuyan Zhang
Summary: This study investigates the evolution of track morphology, melt pool characteristics, and defects in additively manufactured mold steel under different layer thicknesses and laser energy densities. The results show that the morphology of single tracks and the characteristics of the melt pool change with the increase in line energy density. Furthermore, an increase in layer thickness leads to the occurrence of certain defects.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Zhandong Wang, Rui Li, Mingzhi Chen, Kun Yang, Zhonggang Sun, Xuhai Zhang, Shuai Tang, Guifang Sun
Summary: This study investigates the effect of in-situ interstitial N alloying with CrxN on the properties of additively manufactured 316L stainless steel. The results show that N alloying improves the wear and corrosion resistance of DMD 316L, resulting in a fully austenitic phase and increased microhardness and wear resistance. Additionally, the addition of CrxN enhances the pitting corrosion resistance of DMD 316L.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Haleh Ebrahimi, Arash Sabatyan
Summary: This paper presents a novel composite diffractive element that can generate a wide range of beam patterns and structures by redesigning the spiral zone plate and incorporating a complex sinusoidal grating. Additionally, this element functions as a multi-focusing component, enabling the creation of diverse optical arrays. Mathematical analysis, simulations, and experimental validation were conducted to support the research findings.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Fuzhong Sun, Dianfu Sun, Feifan Ren, Guoyu Fu, Kang Wang, Zhenhua Zhang
Summary: This study investigates the influence of forced convective heat transfer on the temperature uniformity of large-aperture ADP crystals and the subsequent effects on their frequency-doubling efficiency. A fan-forced convective heating scheme tailored for ADP crystals is developed and important factors impacting the crystal's temperature distribution are examined. The results show that with a fan tilt angle of 30.0 degrees, the ADP crystal achieves a temperature uniformity of 0.03 degrees C and a frequency doubling conversion efficiency of 87.0%. Further reduction of the cavity length improves the crystal's temperature uniformity to 0.02 degrees C. These findings demonstrate the significant enhancement of crystal temperature uniformity through forced convection and are invaluable for optical applications and crystal engineering.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Naglaa Abdelall, Mohamed Almokhtar, Ghada Khouqeer, Sayed El Soliman
Summary: Topological photonic crystals can support topologically protected states of light, which are immune to backscattering and can be used to construct various optical devices. A method based on cavity-coupled topological edge state in a topological photonic crystal waveguide is proposed to realize a topological rainbow. This method is more robust and versatile than previous methods, making it possible to create a topological rainbow in a wide variety of high-performance devices.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Qin Wang, Yongjun Shi, Kaijun Fan, Shuyao Wang, Ying Li
Summary: This study proposes a laser/UHF induction hybrid deposition process with an embedding tube for forming deep-small holes. The laser and induction powers are used as the main and auxiliary heat sources to melt the metal wire and preheat the objects. A numerical model is developed to investigate the thermal process, and the experiments verify the feasibility of the proposed method.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Ashraf A. A. Beshr, Hossam El-Din Fawzy, Ehab A. A. Eldin, Jong Wan Hu, Fathi A. Abdelmgeed
Summary: This paper introduces the application of digital measuring techniques, specifically Digital Close Range Photogrammetry (DCRP), in the detection of deformation in post-tensioned structural elements (PTSEs). The use of digital equipment and a terrestrial laser scanner (TLS) allows for highly accurate monitoring of PTSE camber, with deviations not exceeding 0.01 mm.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Jian Zhou, Xiaoshan Wang, Ruyan Kang, Zehan Liu, Pengpeng Cheng, Jia Zhao, Zhiyuan Zuo
Summary: This paper presents a detailed simulation-based analysis of continuous-wave Raman laser in silicon carbide waveguide based on SiC-on-insulator. It systematically analyzes the relationship between key parameters and laser output performances, providing theoretical guidance for the experimental design of on-chip SiC Raman laser.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Qi Zhang, Yegang Lu
Summary: This study proposes an optical power splitter that utilizes chalcogenide phase-change materials for low-power power split ratio adjustment. The power split ratio can be continuously changed by altering the crystalline fraction of the phase-change material, and the device has zero static power. The device performs well in handwritten digit recognition tasks and can be applied to optical neuromorphic networks.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Hongbin Zhang, Jiansen Du, Zongtao Chi, Hailin Cong, Bin Wang
Summary: In this paper, a novel type of dual-wavelength confocal metalens is proposed to solve the spatial crosstalk between two wavelengths. The metalens can greatly reduce the spatial crosstalk and achieve high precision and efficiency in confocal imaging. It can also focus light in specific wavelength ranges, making it suitable for imaging, microscopy, and optical fiber communication.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Takeshi Moriyasu, Masahiko Tani, Hideaki Kitahara, Takashi Furuya, Jessica Afalla, Toshiro Kohmoto, Daishiro Koide, Hiroki Sato, Mitsutaka Kumakura
Summary: Optical pump-terahertz probe spectroscopy was used to study the photocarrier dynamics and optical characteristics of semiconductor Si. The results showed that the thickness of Si influenced the transmitted terahertz field amplitude and peak delay time, indicating differences in photocarrier dynamics between different Si materials.
OPTICS COMMUNICATIONS
(2024)
