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Upconversion luminescence and temperature sensing performance of Er^(3+) ions doped self-activated KYb(MoO_(4))_(2) phosphors

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Journal of Rare Earths 2024年第8期42卷 1507-1513,I0004页

作者： Ye Tong Wenpeng Liu Shoujun Ding School of Microelectronics and Data Science Anhui University of TechnologyMaanshan243002China Advanced Laser Technology Laboratory of Anhui Province Hefei230037China Anhui Institute of Optics and Fine Mechanics Chinese Academy of SciencesHefei230031China

In this work,a series of self-activated KYb(MoO_(4))_(2) phosphors with various x at% Er^(3+) doping concentrations(x=0.5,1,3,5,8,10,15) was synthesized by the solid-state reaction *** phase structure of the as-prepared samples was analyzed by X-ray diffraction(XRD),XRD Rietveld refinement and Fourier transform infrared(FT-IR) *** as-prepared samples retain the orthorhombic structure with space group of Pbcn even Er^(3+) doping concentration up to 15 at%.High-purity upconversion(UC) green emission with green to red intensity ratio of 55 is observed from the as-prepared samples upon the excitation of 980 nm semiconductor laser and the optimum doping concentration of Er^(3+) ions in the self-activated KYb(MoO_(4))_(2) host is revealed as 3 at%.The strong green UC emission is confirmed as a two-photon process based on the power-dependent UC *** addition,the fluorescence intensity ratios(FIRs) of the two thermally-coupled energy levels,namely ^(2)H_(11/2) and ^(4)S_(3/2).of Er^(3+) ions were investigated in the temperature region 300-570 K to evaluate the optical temperature sensor behavior of the *** maximum relative sensitivity(S_(R)) is determined to be 0.0069 K^(-1) at300 K and the absolute sensitivity(S_(A)) is determined to be 0.0126 K^(-1) at 300 *** S_(A) of self-activated KYb(MoO_(4))2:Er^(3+)is almost twice that of traditional KY(MoO_(4))2:Er^(3+)/Yb^(3+)codoping *** results demonstrate that Er^(3+) ions doped self-activated KYb(MoO_(4))2 phosphor has promising application in visible display,trademark security and optical temperature sensors.

关键词： Er^(3+)ions doped KYb(MoO_(4))_(2) Self-activated phosphors Upconversion luminescence Solid-state reaction method Optical temperature sensors Rare earths

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Passively Q-switched operation of a 1.94μm thulium-doped solid-state laser based on MXeneV_(2)CT_(x)

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Chinese Optics Letters 2023年第2期21卷 40-44页

作者：袁晋鹤李佳睿吴政阳李双成韩杰李林军 College of Physical Science and Technology Heilongjiang UniversityHarbin 150080China Heilongjiang Provincial Key Laboratory of Laser Spectroscopy Technology and Application Harbin University of Science and TechnologyHarbin 150080China School of Data Science and Technology Heilongjiang UniversityHarbin 150080China

MXene V_(2)CT_(x) has great practicability because it is not easy to degrade under ambient *** this paper,a V_(2)CT_(x) saturable absorber(SA)was firstly applied to a passively Q-switched(PQS)laser,to the best of our *** V_(2)CT_(x)-SA was prepared by the spin-coating *** linear absorption of the V_(2)CT_(x)-SA in the 1000-2200 nm region and the nonlinear absorption near 2μm were *** the V_(2)CT_(x)-SA,a typical PQS operation at 1.94μm was realized in a Tm:*** minimum pulse width produced by the PQS laser was 528 ns,and the peak power,repetition rate,and average output power were 10.06 W,65.9 kHz,and 350 mW,***,the maximum pulse energy was 6.33μ*** work demonstrates that the V_(2)CT_(x) can be used as an effective SA to obtain nanosecond pulses with high peak power and high repetition rate simultaneously.

关键词： passive Q-switching MXene V2CTx saturable absorber thulium doping

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Upconversion luminescence and optical thermometry behaviors of Yb^(3+)and Ho^(3+)co‑doped GYTO crystal

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Frontiers of Optoelectronics 2023年第3期16卷 179-189页

作者： Chuancheng Zhang Shoujun Ding Miaomiao Wang Hao Ren Xubing Tang Yong Zou Renqin Dou Wenpeng Liu School of Microelectronics and Data Science Anhui University of TechnologyMaanshan 243002China Anhui Institute of Optics and Fine Mechanics Chinese Academy of SciencesHefei 230031China Advanced Laser Technology Laboratory of Anhui Province Hefei 230037China Anhui Provincial Joint Key Laboratory of Disciplines for Industrial Big Data Analysis and Intelligent Decision Maanshan 243002China

Optical thermometry based on the upconversion(UC)luminescence intensity ratio(LIR)has attracted considerable attention because of its feasibility for achievement of accurate non-contact temperature *** with traditional UC phosphors,optical thermometry based on UC single crystals can achieve faster response and higher sensitivity due to the stability and high thermal conductivity of the single *** this study,a high-quality 5 at%Yb^(3+)and 1 at%Ho^(3+)co-doped Gd_(0.74)Y_(0.2)TaO_(4)single crystal was grown by the Czochralski(Cz)method,and the structure of the as-grown crystal was ***,the UC luminescent properties and optical thermometry behaviors of this crystal were *** 980 nm wavelength excitation,green and red UC luminescence lines at 550 and 650 nm and corresponding to the^(5)F_(4)/^(5)S_(2)→^(5)I_(8)and^(5)F_(5)→^(5)I_(8)transitions of Ho^(3+),respectively,were *** green and red UC emissions involved a two-photon mechanism,as evidenced by the analysis of power-dependent UC emission *** temperature-dependent UC emission spectra were measured in the temperature range of 330–660 K to assess the optical temperature sensing *** 660 K,the maximum relative sensing sensitivity(S_(r))was determined to be 0.0037 K^(−1).These results highlight the signifcant potential of Yb,Ho:GYTO single crystal for optical temperature sensors.

关键词： Yb,Ho:GYTO Optical temperature sensor Luminescence intensity ratio Upconversion luminescence

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An Enhanced Velocity Measurement of Coherent Lidar Based on Time-Domain Compensation and Phase Compensation

An Enhanced Velocity Measurement of Coherent Lidar Based on ...

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2024 Asia Communications and Photonics Conference, ACP 2024 and International Conference on Information Photonics and Optical Communications, IPOC 2024

作者： Li, Xianzhuo Ye, Nan Zhang, Junjie Li, Yingchun Lu, Zhiyong Jia, Honghui Yuan, Haoming Liu, Wenzhong Chen, Kun Key Laboratory of Specialty Optics and Optical Access Networks Shanghai Institute for Advanced Communication Data Science Shanghai University Shanghai China Key Laboratory of Space Laser Transmission and Detection Technology Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences Shanghai China

We propose an enhanced speed detection method that reduces computational resource. Measurements of targets at 18.5 km show that the average speed detection probability increases by 49.17%, and the average speed mean s... 详细信息

ISBN: (纸本)9798350379266

关键词： Velocity measurement

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Implementing DevOps Practices in CPPS Using Microservices and GitOps 28

Implementing DevOps Practices in CPPS Using Microservices an...

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28th IEEE International Conference on Emerging Technologies and Factory Automation, ETFA 2023

作者： Koren, István Rinker, Felix Meixner, Kristof Kröger, Moritz Zeng, Michael RWTH Aachen University Process and Data Science Germany Technische Universität Wien CDL SQI Institute of Information Systems Engineering Austria RWTH Aachen University Laser Technology Germany RWTH Aachen University Laboratory for Machine Tools and Production Engineering Germany

ISBN: (纸本)9798350339918

As digitalization shapes Industry 4.0, integrating software engineering practices into the manufacturing domain becomes a key focus. DevOps is such a practice and methodology that enhances collaboration and automates processes in software development and IT operations. In previous work, we discussed challenges and opportunities of applying the DevOps paradigm in Cyber-Physical Production Systems (CPPS) engineering, which are complex systems that integrate physical components with computer-controlled operations. This paper instantiates our DevOps4CPPS framework, spotlighting the application of GitOps and microservices in a CPPS environment. A real-world case study from laser ultra short pulse manufacturing illustrates how the approach effectively addresses the inherent challenges of CPPS, boosting agility and operational performance, while reducing downtime. The paper provides guidance to researchers and practitioners on applying DevOps practices to CPPS, and suggests future research directions. © 2023 IEEE.

关键词： Software design

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Mode-modulation-induced high power dual-wavelength generation in a random distributed feedback Raman fiber laser

Mode-modulation-induced high power dual-wavelength generatio...

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作者： Li, Yang Yao, Haoguang Fan, Chenchen Hao, Xiulu Yao, Tianfu Zhou, Pu Zeng, Xianglong College of Advanced Interdisciplinary Studies National University of Defense Technology Changsha410073 China Nanhu Laser Laboratory National University of Defense Technology Changsha410073 China Key Laboratory of Specialty Fiber Optics and Optical Access Networks Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication Shanghai Institute for Advanced Communication and Data Science Shanghai University Shanghai200444 China

An all-fiberized random distributed feedback Raman fiber laser (RRFL) with modemodulation- induced wavelength manipulation and dual-wavelength generation has been demonstrated, where an electrically controlled intra-cavity acoustically-induced fiber grating (AIFG) is employed to adjust the input modal content at the signal wavelength. The wavelength agility of both the Raman effect and the Rayleigh backscattering in RRFL benefits on broadband laser output in case of broadband pumping. The feedback modal content at different wavelengths can be adjusted by AIFG, and then the output spectral manipulation can be ultimately manifested through the mode competition in RRFL. Under the efficient mode modulation, the output spectrum can be continuously tuned from 1124.3 nm to 1133.8 nm with single wavelength, while ulteriorly the dual-wavelength spectrum can be formed at 1124.1 nm and 1134.7 nm with a signal-noise-ratio of 45 dB. Throughout, the power is beyond 47 W with good stability and repeatability. To the best of our knowledge, this is the first dual-wavelength fiber laser based on mode modulation and the highest output power ever reported for an all-fiberized continuous wave dual-wavelength fiber laser. © 2023 Optica Publishing Group.

关键词： Feedback

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Single-shot super-resolution imaging via discernibility in the high-dimensional light-field space based on ghost imaging

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Photonics Research 2025年第6期13卷 1709-1725页

作者： Zhishen Tong Chenyu Hu Jian Wang Youheng Zhu Xia Shen Zhentao Liu Shensheng Han Aerospace Laser Technology and System Department Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences Shanghai 201800 China Wangzhijiang Innovation Center for Laser Aerospace Laser Technology and System Department Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences Shanghai 201800 China School of Physics and Optoelectronic Engineering Hangzhou Institute for Advanced Study University of Chinese Academy of Sciences Hangzhou 310024 China School of Data Science Fudan University Shanghai 200433 China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing 100049 China e-mail: ztliu@*** e-mail: sshan@***

Super-resolution (SR) imaging has been widely used in several fields like remote sensing and microscopy. However, it is challenging for existing SR approaches to capture SR images in a single shot, especially in dynamic imaging scenarios. In this study, we present a single-shot SR imaging scheme that leverages discernibility in the high-dimensional (H-D) light-field space based on a ghost imaging camera via sparsity constraints (GISC camera), which is capable of encoding H-D imaging information into a two-dimensional speckle pattern detected in a single shot. We demonstrate both theoretically and experimentally that while the resolution in the H-D light-field space, characterized by the second-order light-field correlation, remains limited by light-field diffraction, the single-shot spatial resolution is greatly improved beyond classical Rayleigh’s criterion by utilizing the discernibility in the H-D light-field space. We further quantify the effects of the sampling number, signal-to-noise ratio, and object sparsity on the resolution. Our results offer significant potential for the SR observation of high-speed dynamic processes.

关键词： Ghost imaging Imaging systems Imaging techniques Near field scanning optical microscopy Optical systems Remote sensing

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Dy3+ and Tb3+ Codoped Mixed Garnet Crystals with High-Disorder Structure for Promising Efficient Ingan laser-Diode Pumped Yellow lasers

SSRN

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SSRN 2023年

作者： Ding, Shoujun Zhang, Chuancheng Ren, Hao Wang, Miaomiao Zou, Yong Tang, Xubing Huang, Xianshan School of Microelectronics and Data Science Anhui University of Technology Anhui Maanshan243002 China Advanced Laser Technology Laboratory of Anhui Province Anhui Hefei230037 China Anhui Institute of Optics and Fine Mechanics Chinese Academy of Sciences Anhui Hefei230031 China

Two different composition mixed garnet crystals codoping with Dy3+ and Tb3+ were grown by Czochralski method. Their structure and thermal properties were characterized and the effects of doping ions on their structure and thermal properties were analyzed. Besides, a simple and robust method was proposed for fitting the specific heat and thermal diffusivity of garnet crystals from room temperature to higher temperature. Their absorption properties were studied and their bandgap energies were fitted using Tauc formula. The bandgap energy of garnet crystals versus the radius of cations support Yadav′s prediction. The blue, UV and VUV excited emission characteristics of the crystals were investigated. The energy transfers mechanism between Dy3+ and Tb3+ in mixed garnet crystals were proposed upon the absorption and emission characterizations. The results indicate that the mixed garnet crystals exhibit overall advantages for blue LD pumped yellow lasers. © 2023, The Authors. All rights reserved.

关键词： Pumping (laser)

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Dy3+ and Tb3+ Codoped Mixed Garnet Crystals with High-Disorder Structure for Promising Efficient Ingan laser-Diode Pumped Yellow lasers

SSRN

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SSRN 2023年

作者： Ding, Shoujun Zhang, Chuancheng Ren, Hao Wang, Miaomiao Zou, Yong Liu, Wenpeng Zhang, Qingli School of Microelectronics and Data Science Anhui University of Technology Anhui Maanshan243002 China Advanced Laser Technology Laboratory of Anhui Province Anhui Hefei230037 China Anhui Institute of Optics and Fine Mechanics Chinese Academy of Sciences Anhui Hefei230031 China

关键词： Pumping (laser)

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Optical Temperature Sensing of Yb,Er:Gsag Single Crystal in Both Upconversion and Downconversion Dual-Mode Luminescence

SSRN

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SSRN 2023年

作者： Ding, Shoujun Ren, Hao Zheng, Yuhang Zhang, Chuancheng Wang, Miaomiao Zou, Yong Liu, Wenpeng Zhang, Qingli School of Microelectronics and Data Science Anhui University of Technology Anhui Maanshan243002 China Advanced Laser Technology Laboratory of Anhui Province Anhui Hefei230037 China Anhui Institute of Optics and Fine Mechanics Chinese Academy of Sciences Anhui Hefei230031 China Anhui Provincial Joint Key Laboratory of Disciplines for Industrial Big Data Analysis and Intelligent Decision China

Fluorescence intensity ratio thermometry represents a novel non-contact approach for rapid and precise temperature measurements. In this study, a Yb,Er:GSAG single crystal was investigated, exploiting the dual-mode luminescence of upconversion and downconversion for optical temperature sensing applications. The crystal exhibited distinct luminescence behaviors when subjected to 266 nm, 355 nm, and 980 nm laser excitations, manifesting a dark blue appearance under UV 266 nm excitation and a green hue under 355 nm and 980 nm excitations. Specifically, under 355 nm excitation, the crystal demonstrated a predominantly pure green upconversion, with a green-to-red ratio of 38. For the first time, we propose an investigation into the temperature sensing behavior under dual-mode luminescence in the same crystal, utilizing the fluorescence intensity ratio of the 2H11/2 and 4S3/2 thermally coupled energy levels of Er3+. The obtained maximum relative sensitivities SR for the two fitted luminescence modes were found to be 101.80Í10-4 K-1 at 300 K (980 nm excitation) and 50.53Í10-4 K-1 at 480 K (355 nm excitation), respectively. The impressive SR values substantiate Yb,Er:GSAG crystal as highly promising candidates for optical temperature sensing applications. © 2023, The Authors. All rights reserved.

关键词： Single crystals

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