Journal of Russian Laser Research最新文献_第10页

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":"44 4","pages":"415 - 425"},"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":"44 4","pages":"426 - 438"},"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":"44 4","pages":"399 - 406"},"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

Evolution Properties of a Partially Coherent Laguerre Pulsed Vector Vortex Beam in a Turbulent Atmosphere with Anisotropy 各向异性湍流大气中部分相干拉盖尔脉冲矢量涡旋光束的演化特性

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/s10946-023-10151-9

Bangzhuo An, Yonggen Xu, Wenli Liu, Nianchi Hao, Yongtao Liu, Xueru Deng

引用次数: 0

Tunable and Switchable Low-Threshold Multi-Wavelength Erbium-Doped Fiber Pulsed Laser Based on Lyot Filter and NOLM 基于Lyot滤波和NOLM的可调可切换低阈值多波长掺铒光纤脉冲激光器

IF 0.9 4区物理与天体物理

Journal of Russian Laser Research Pub Date : 2023-07-13 DOI: 10.1007/s10946-023-10135-9

Honggang Pan, Zhipan Chen, Ailing Zhang, Bo Zhang, Yaomei Peng, Zhanzhi Liu, Qianxu Wang, Nan Cui, Junpeng Zhou

引用次数: 1

High-Resolution Single-Photon Imaging with a Low-Fill-Factor 32×32 SPAD Array by Scanning in the Photosensitive Area 低填充因子32×32 SPAD阵列在光敏区扫描的高分辨率单光子成像

IF 0.9 4区物理与天体物理

Journal of Russian Laser Research Pub Date : 2023-07-13 DOI: 10.1007/s10946-023-10140-y

Hengshuo Guo, Yahui Li, Guilong Gao, Gang Wang, Mengmeng Yue, Chao Ji, Di Wang, Xiaoqiang Feng

{"title":"High-Resolution Single-Photon Imaging with a Low-Fill-Factor 32×32 SPAD Array by Scanning in the Photosensitive Area","authors":"Hengshuo Guo, Yahui Li, Guilong Gao, Gang Wang, Mengmeng Yue, Chao Ji, Di Wang, Xiaoqiang Feng","doi":"10.1007/s10946-023-10140-y","DOIUrl":"10.1007/s10946-023-10140-y","url":null,"abstract":"<div>Single-photon light detection and ranging (LiDAR) provides the single-photon sensitivity and picosecond time resolution, which is rapidly developing in three-dimensional (3D) imaging applications. Spatial resolution and imaging quality of LiDAR based on the single-photon avalanche-diode (SPAD) array detectors are difficult to improve, because currently available SPAD arrays still have small size array, due to the semiconductor manufacturing process limitation, and the functional circuitry around pixels reduces the fill factor. Herein, we propose a photon-efficient LiDAR method that guarantees the coupling relationship between the photosensitive area of each pixel and the corresponding beam spot illuminated on the target and uses 1/4 field of view (FoV) scanning imaging in the photosensitive area. The proposed method can effectively improve the spatial resolution of LiDAR system based on SPAD array detectors. Resolution test experiments show that the best observed (transversal) resolution is 3.1748 lp/mm at a working distance of 2.3 m, over tenfold larger than that of previous methods. Three-dimensional experiments prove that the system can achieve 3D high-resolution single-photon imaging, which is valuable in the fields of remote sensing and long-range target recognition.</div>","PeriodicalId":663,"journal":{"name":"Journal of Russian Laser Research","volume":"44 3","pages":"348 - 356"},"PeriodicalIF":0.9,"publicationDate":"2023-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4540346","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

341 W Continuous-Wave Dual-End-Pumped Tm:YAP Slab Laser 341 W连续波双端泵浦Tm:YAP平板激光器

IF 0.9 4区物理与天体物理

Journal of Russian Laser Research Pub Date : 2023-07-13 DOI: 10.1007/s10946-023-10138-6

Qunlong Long, Jimeng Gao, Qingwen Han, Lei Wang, Yong He, Yefei Mao

引用次数: 0

The Ti3SiC2 Max Phase Material for Q-Switched Pulse Generation 用于调q脉冲产生的Ti3SiC2 Max相材料

IF 0.9 4区物理与天体物理

Journal of Russian Laser Research Pub Date : 2023-07-13 DOI: 10.1007/s10946-023-10134-w

M. A. A. B. Sahib, Rozalina Zakaria, Nur Farhana Zulkipli, Ahmad H. A. Rosol, Moh Yasin, Sulaiman Wadi Harun

引用次数: 0