Journal of Russian Laser Research最新文献_第8页

Effect of Fast Axial Flow CO2 Laser Processing Parameters on Graphene/AlxCoCrNiTi High Entropy Alloy 快速轴流CO2激光加工参数对石墨烯/AlxCoCrNiTi高熵合金的影响

IF 0.9 4区物理与天体物理

Journal of Russian Laser Research Pub Date : 2023-08-29 DOI: 10.1007/s10946-023-10154-6

Xingwu Qiu

{"title":"Effect of Fast Axial Flow CO2 Laser Processing Parameters on Graphene/AlxCoCrNiTi High Entropy Alloy","authors":"Xingwu Qiu","doi":"10.1007/s10946-023-10154-6","DOIUrl":"10.1007/s10946-023-10154-6","url":null,"abstract":"<div>The energy distribution characteristics of fast axial flow CO2 lasers demonstrate that they are often used for cutting and welding metal materials, and it is generally believed that they are not suitable for material heat treatment. In order to expand the application range of these lasers, we prepare graphene (Gr) reinforced high entropy alloy (HEA) coatings, employing this type of laser under loworder mode conditions by adjusting processing parameters and cladding powder composition through orthogonal experiments. Then we study the effect of laser processing parameters on Gr/AlxCoCrNiTi composite coatings. The research results indicate that the optimum process parameters are as follows: the laser power P = 3200 W, the scanning speed V = 14 mm/s, the cladding powder thickness d = 1.2 mm, and the spot diameter D = 4.0 mm. We find that, under the optimum process parameters, the Gr/AlxCoCrNiTi laser cladding coatings exhibit typical dendrites and equiaxed grains. The microstructure refines with increase in the Al content. The Gr/AlxCoCrNiTi laser cladding coating mainly consists of the face centered cubic (FCC), body centered cubic (BCC), and M23C6. Increase in the Al content promotes the formation of the BCC structure. The microhardness of Gr/AlxCoCrNiTi composite coatings range from 550 to 725 HV. The hardness is related to the solid solution strengthening caused by Gr and Al. With increase in the Al content, the microhardness of the coating shows a trend to increase, the wear resistance first increases and then decreases. The wear resistance is related to the BCC content and cracks in the coating. Orthogonal experiments and coating performance indicate that, by adjusting laser processing parameters and alloy composition, it is possible for fast axial flow CO2 lasers to prepare Gr/AlxCoCrNiTi composite coatings under low-order mode conditions, which can expand the applicability of these lasers.</div>","PeriodicalId":663,"journal":{"name":"Journal of Russian Laser Research","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2023-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"6642926","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Comparative Study of Two Definitions of the Turbulent Distance for Laser Beams Propagating Through Non-Kolmogorov Atmospheric Turbulence 激光穿过非柯尔莫哥洛夫大气湍流时两种湍流距离定义的比较研究

IF 0.9 4区物理与天体物理

Journal of Russian Laser Research Pub Date : 2023-08-26 DOI: 10.1007/s10946-023-10152-8

Yongping Huang, Zhichun Duan, Xingyong Huang, Shiwei Xie

{"title":"Comparative Study of Two Definitions of the Turbulent Distance for Laser Beams Propagating Through Non-Kolmogorov Atmospheric Turbulence","authors":"Yongping Huang, Zhichun Duan, Xingyong Huang, Shiwei Xie","doi":"10.1007/s10946-023-10152-8","DOIUrl":"10.1007/s10946-023-10152-8","url":null,"abstract":"<div>Using two definitions of the turbulent distance to characterize the laser beam propagation through atmospheric turbulence, we derive a general analytical expression for the beam spread η depending on the turbulence parameter T(α) with the generalized exponent α and on the initial second-order beam moments in the z = 0 plane. Larger values of η correspond to a larger influence of atmospheric turbulence on the laser beam. We subsequently apply the analytical expression of η to a partially coherent Hermite–Gaussian beam propagating through non-Kolmogorov turbulence and illustrate the properties of η by numerical examples. The results show that the η values first increase, reach their maximum for a generalized exponent α ≈ 3.11, and then decrease with increase in α. Also η decreases with increasing beam order and wavelength, as well as with increasing values of the generalized refractive-index structural turbulence parameter, beam waist width, and coherence parameter.</div>","PeriodicalId":663,"journal":{"name":"Journal of Russian Laser Research","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2023-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"6642920","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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-Energy Nd :YAG Laser Technology Based on Dust-Cloud Pyrotechnic Pumping 基于尘云烟火抽运的高能Nd:YAG激光技术

IF 0.9 4区物理与天体物理

Journal of Russian Laser Research Pub Date : 2023-08-26 DOI: 10.1007/s10946-023-10146-6

Wei Jiang, Caiguo Zheng, Cheng Ye, Zao Yi, Fusheng Zheng, Yongjian Tang

引用次数: 0

Generation of Picosecond Pulses in Erbium-Doped Fiber Lasers Via Mode Locking Using V4AlC3 Thin Film 利用V4AlC3薄膜锁模产生掺铒光纤激光器中的皮秒脉冲

IF 0.9 4区物理与天体物理

Journal of Russian Laser Research Pub Date : 2023-08-26 DOI: 10.1007/s10946-023-10145-7

Nur Zulaikha Mohd Safuan, Ahmad Haziq A. Rosol, NurFarhanah Zulkipli, Moh Yasin, Sulaiman Wadi Harun

{"title":"Generation of Picosecond Pulses in Erbium-Doped Fiber Lasers Via Mode Locking Using V4AlC3 Thin Film","authors":"Nur Zulaikha Mohd Safuan, Ahmad Haziq A. Rosol, NurFarhanah Zulkipli, Moh Yasin, Sulaiman Wadi Harun","doi":"10.1007/s10946-023-10145-7","DOIUrl":"10.1007/s10946-023-10145-7","url":null,"abstract":"<div>Short pulses are showing increasing importance in various industrial and scientific applications. Here, we exploit the saturable absorption of a ternary layered MAX-phase compound of Vanadium Aluminum carbide (V4AlC3) to produce mode-locked pulses in Erbium-doped fiber-laser (EDFL) cavity. The V4AlC3 composite thin film with a modulation depth of 24% is successfully obtained by embedding the commercial V4AlC3 powder into polyvinyl alcohol (PVA). It is integrated into an EDFL cavity, as a saturable absorber (SA), to generate a highly-stable mode-locked pulse, which operates at the 1559.8 nm wavelength. We successfully obtain the mode-locked pulse train with a fixed repetition rate of 1.8 MHz and a pulse width of 3.66 ps, as the pump power is set within a range from 73.1 to 108.1 mW. At the maximum pump power equal to 108.1 mW, the average output power, pulse energy, and peak power are 10.2 mW, 5.4 nJ, and 1.5 W, respectively. Overall, these results show the potential of V4AlC3 MAX-phase material to be used in ultrafast generation. The proposed approach is straightforward and can also be applied to operate in other wavelength regions.</div>","PeriodicalId":663,"journal":{"name":"Journal of Russian Laser Research","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2023-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"6642919","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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-Sensitivity Two-Core Dual-Polarization Photonic-Crystal-Fiber Surface-Plasmon-Resonance Sensor Based on Indium Tin Oxid 基于氧化铟锡的高灵敏度双核双偏振光子晶体光纤表面等离子体共振传感器

IF 0.9 4区物理与天体物理

Journal of Russian Laser Research Pub Date : 2023-08-26 DOI: 10.1007/s10946-023-10144-8

Nan Cui, Honggang Pan, Ailing Zhang, Zihong Zhao, Zhipan Chen, Bo Zhang, Sihang Lin, Guangxiao Cao

{"title":"High-Sensitivity Two-Core Dual-Polarization Photonic-Crystal-Fiber Surface-Plasmon-Resonance Sensor Based on Indium Tin Oxid","authors":"Nan Cui, Honggang Pan, Ailing Zhang, Zihong Zhao, Zhipan Chen, Bo Zhang, Sihang Lin, Guangxiao Cao","doi":"10.1007/s10946-023-10144-8","DOIUrl":"10.1007/s10946-023-10144-8","url":null,"abstract":"<div>In this paper, we propose a high-sensitivity two-core dual-polarization photonic-crystal-fiber surfaceplasmon-resonance (PCF-SPR) sensor based on Indium Tin oxide (ITO). ITO is a conductor material with adjustable photoelectric properties and low losses in the infrared range, and the two-core structure could better direct the incident light to the metal surface to enhance the coupling. According to numerical simulation results, the maximum wavelength sensitivities are 17,000 nm/RIU and 25,500 nm/RIU in the x-polarization mode and y-polarization mode. The maximum resolution of the x-polarization mode and y-polarization mode of the sensor can reach 5.88·10−6 RIU and 3.92·10−6 RIU, respectively, and the liquid refractive index detection range is 1.32 – 1.39. Taking into account the simple structure and excellent sensing performance, the sensor has wide application prospect and can accurately detect the refractive index of liquids, such as blood plasma, hemoglobin, etc.</div>","PeriodicalId":663,"journal":{"name":"Journal of Russian Laser Research","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2023-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"6642916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Formation of Low-Coherent Beams in Nd:YVO4 and Nd:YAG Lasers Nd:YVO4和Nd:YAG激光器中低相干光束的形成

IF 0.9 4区物理与天体物理

Journal of Russian Laser Research Pub Date : 2023-08-26 DOI: 10.1007/s10946-023-10149-3

Alexey L. Koromyslov, Yuri V. Senatsky

{"title":"Formation of Low-Coherent Beams in Nd:YVO4 and Nd:YAG Lasers","authors":"Alexey L. Koromyslov, Yuri V. Senatsky","doi":"10.1007/s10946-023-10149-3","DOIUrl":"10.1007/s10946-023-10149-3","url":null,"abstract":"<div>Lasers with low-coherent radiation have attracted the attention since the first publications on this topic in the 1960s and up to the present time, thanks to their numerous applications. Compact lowcoherent lasers with a flow of the active medium through the pumped region can be done, using dense mixtures of solid particles and a liquid – slurry lasers. The preparation of slurry compositions based on particles like Nd :YVO4 or Nd :YAG crystal granules meets certain difficulties associated with the use of liquids having high refractive indices, n ≈ 2. Here, we study the properties of a perspective Nd-doped slurry laser in model experiments, comparing parameters of Nd :YVO4 and Nd :YAG slab lasers in compact plano-spherical resonators with and without a cuvette-diffuser on an immersion mixture of LiF crystal microparticles and isobutyl alcohol, n ≈ 1.39. At a laser diode pump power of 100 W, these lasers (without a cuvette) emit, in a quasicontinuous multimode regime, 1 ms pulses of low-coherent radiation (⋋ ≈ 1064 nm) with a divergence of 20 – 40 mrad and the 21 – 47 W power at the 10 Hz repetition rate. Under the same pumping conditions, we obtain a low-coherent radiation with the 1 – 6 W power and divergence up to 100 mrad in these lasers with a cuvette-diffuser. The spatial coherence of these lasers under changes in the pump current, pump spot sizes, and the state of immersion in the cuvette is estimated from the contrast C of the speckle patterns produced by the radiation. Also, we register C values in the region 0.02 − 0.04, comparable to the thermal sources contrast. The presented scheme demonstrates low-coherent Nd :YVO4 and Nd :YAG lasers and show the feasibility of creating compact LD-pumped slurry lasers.</div>","PeriodicalId":663,"journal":{"name":"Journal of Russian Laser Research","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2023-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"6642921","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Doped Effects of Quaternary AlInGaN Last Quantum Barrier for Deep-Ultraviolet Laser Diodes Without Electron Blocking Layer 无电子阻挡层的深紫外激光二极管中第四系AlInGaN末量子势垒的掺杂效应

IF 0.9 4区物理与天体物理

Journal of Russian Laser Research Pub Date : 2023-08-26 DOI: 10.1007/s10946-023-10148-4

Mengshuang Yin, Xien Sang, Yuan Xu, Fang Wang, Juin J. Lion, Yuhuai Liu

引用次数: 0

Beam Propagation Factor of a Partially Coherent Twisted Elliptical Vortex Beam in Inhomogeneous Atmospheric Turbulence 非均匀大气湍流中部分相干扭曲椭圆涡旋光束的传播系数

IF 0.9 4区物理与天体物理

Journal of Russian Laser Research Pub Date : 2023-08-26 DOI: 10.1007/s10946-023-10150-w

Wenli Liu, Yonggen Xu, Bangzhuo An, Qian Xu, Nianchi Hao, Yongtao Liu

{"title":"Beam Propagation Factor of a Partially Coherent Twisted Elliptical Vortex Beam in Inhomogeneous Atmospheric Turbulence","authors":"Wenli Liu, Yonggen Xu, Bangzhuo An, Qian Xu, Nianchi Hao, Yongtao Liu","doi":"10.1007/s10946-023-10150-w","DOIUrl":"10.1007/s10946-023-10150-w","url":null,"abstract":"<div>Based on the extended Huygens–Fresnel principle and the second-order moments of the Wigner distribution function (WDF), we derive the analytical formulas for the root-mean-square (rms) spatial width, rms angular width, and M2-factor of a partially coherent twisted elliptical vortex beam (PCTEVB) propagating through the inhomogeneous atmospheric turbulence. The spatial spreading, angular width, and M2-factor of a PCTEVB in turbulence are investigated numerically and comparatively. We find an interesting result that the relative rms angular width and M2-factor of PCTEVB with a small ellipticity propagating through turbulence decreases, meaning that the elliptical vortex beam is less affected by the inhomogeneous atmospheric turbulence in comparison with the traditional vortex beam. We also find that the relative M2-factor and the relative rms angular width of PCTEVB mainly depend on the topological charge, twist factor, initial coherent length, zenith angle, and propagation distance. In addition, the PCTEVB, with a small initial coherent length and ellipticity as well as a large twist factor, has a stronger anti-turbulence ability. Our outcomes may have future extensive possibilities in free-space optical communications.</div>","PeriodicalId":663,"journal":{"name":"Journal of Russian Laser Research","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2023-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"6642914","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 Parametric Study on the Effects of the Electrode Size on the Performance of a Small-Size RF-Excited Fast-Axial-Flow CO2 Laser 电极尺寸对小尺寸射频激发快速轴流CO2激光器性能影响的参数化研究

IF 0.9 4区物理与天体物理

Journal of Russian Laser Research Pub Date : 2023-08-26 DOI: 10.1007/s10946-023-10147-5

K. Silakhori, R. Neshati, D. Esmaeilpour Ghoochani, F. Kazemyzade, M. Ilchi, M. Talebi, Z. Rajabi, Z. Pourhasan Nezhad

{"title":"A Parametric Study on the Effects of the Electrode Size on the Performance of a Small-Size RF-Excited Fast-Axial-Flow CO2 Laser","authors":"K. Silakhori, R. Neshati, D. Esmaeilpour Ghoochani, F. Kazemyzade, M. Ilchi, M. Talebi, Z. Rajabi, Z. Pourhasan Nezhad","doi":"10.1007/s10946-023-10147-5","DOIUrl":"10.1007/s10946-023-10147-5","url":null,"abstract":"<div>We construct and characterize a small-size fast-axial-flow RF-excited CO2 laser. The laser, including a pair of 10 cm long electrodes symmetrically positioned around a quartz tube, is driven by an RF generator with the 1 kW maximum power at a frequency of 13.56 MHz. The output power and efficiency of the laser are experimentally measured under different structural and operational conditions, such as the discharge tube diameter, width and length of electrodes, as well as the input RF power. The width of the electrodes is changed in such a way that the ratio of the total width of electrodes to the perimeter of the discharge tube (the so-called geometric ratio) varies in the 0.3 – 0.6 range. The diameter of the discharge tube is also changed in the 20 – 30 mm range. The results show that, for every given discharge tube diameter, optimum performance of the laser is obtained for 0.4 and 0.5 values of the geometric ratio. Although, a maximum output power of 63.5 W can be obtain applying the 1 kW input power, using the 2.6 cm discharge tube diameter, 0.6 geometric ratio, and CO2 :N2 :He=1 : 3 : 5 gas mixture at the 90 mbar total pressure. However, an optimum laser efficiency of 7.2% is reached under this condition for the 57.5 W output power. Further, the highest total output power and output power per unit length of the electrodes are obtained for the 20 and 10 cm electrode lengths, respectively.</div>","PeriodicalId":663,"journal":{"name":"Journal of Russian Laser Research","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2023-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"6642915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Diffraction Losses of a Dielectric Open Resonator 介电开腔的衍射损耗

IF 0.9 4区物理与天体物理

Journal of Russian Laser Research Pub Date : 2023-08-26 DOI: 10.1007/s10946-023-10143-9

Alexei V. Popov, Marina N. Popova

引用次数: 0