检索结果-内蒙古大学图书馆

laser diode pumped Tm:YAG single-crystal fiber laser

学校读者我要写书评

暂无评论

Laser diode pumped Tm:YAG single-crystal fiber laser

Advanced Solid State lasers, ASSL 2021 - Part of laser Congress, LAC 2021

作者： Zhao, Yongguang Liu, Jian Dong, Jifei Wang, Yinyin Guo, Jun Xu, Xiaodong Xue, Yanyan Xu, Jun Wang, Zhengping Xu, Xinguang 1Jiangsu Key Laboratory of Advanced Laser Materials and Devices Jiangsu Normal University Xuzhou221116 China 2Jiangsu Collaborative Innovation Centre of Advanced Laser Technology and Emerging Industry Jiangsu Normal University Xuzhou221116 China Institute for Advanced Study 3School of Physics Science and Engineering Tongji University Shanghai200092 China 4State Key Laboratory of Crystal Materials and Institute of Crystal Materials Shandong University Jinan250100 China

We present the first Tm:YAG single-crystal fiber laser with free-space propagation of only the laser beam. An output power of 9.1 W is achieved at ~ 2.02 μm with a slope efficiency of 49.4%. © 2021 The Author(s).

ISBN: (纸本)9781557528209

关键词： Yttrium aluminum garnet

Strong Kerr electro-optic effects in PMN-PT single crystal with low composition by Sm doping

学校读者我要写书评

暂无评论

Ceramics International 2025年

作者： Wang, Hongwei He, Chongjun Deng, Chenguang Chen, Ziyun Chen, Hongbing Chen, Fangzhou Zha, Jiahao Dong, Biao Liu, Lijuan Xia, Mingjun Li, Qian Lu, Yuangang Key Laboratory of Space Photoelectric Detection and Perception in Ministry of Industry and Information Technology College of Astronautics Nanjing University of Aeronautics and Astronautics 29 Jiangjun Road Nanjing211106 China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing100084 China School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University Shanghai200240 China School of Materials Science and Chemical Engineering Ningbo University Ningbo315211 China Beijing Center for Crystal Research and Development Key Laboratory of Functional Crystals and Laser Technology Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing100190 China

Pb(Mg1/3Nb2/3)O3-xPbTiO3 (PMN-xPT) single crystal has been applied in many fields due to its excellent piezoelectric properties, but the optical properties remains to be explored. Here, the rhombohedral phase PMN-0.15 PT and 1 % Sm doped PMN-0.15 PT single crystal (Sm-PMN-0.15 PT) were grown by the Bridgman method. The crystal structure was investigated by X-ray diffraction, HRTEM, Raman spectra and second harmonic generation (SHG) microscopy. Combined with the characterization of dielectric, ferroelectric and electro-optic effects, we revealed the dynamic response of polar nanoregions (PNR) and phase transition to the electro-optic properties of crystals. The results demonstrate that the doping of Sm3+ ions can effectively reduce the Curie temperature (Tm) from 57 °C to 38 °C while maintaining high dielectric response characteristics. The Kerr electro-optic coefficient of PMN-0.15 PT and Sm-PMN-0.15 PT can reach 2.55 × 10−16 m2/V2 at 48 °C and 3.40 × 10−16 m2/V2 around 38 °C respectively. Due to the influence of PNR, the peak value of the Kerr electro-optical coefficient measured in the cooling process is higher than that measured in the heating process. The Sm-PMN-0.15 PT has a wide operating temperature range close to room temperature and stable response of frequency, rendering it promising candidate for application in electro-optic devices. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Kerr electrooptical effect

Aeag7(Ps4)3 (Ae = Ba, Sr): The Homovalent Substitution of Lead by Alkaline Earth Metals Achieves the Separation of the Two Phases and Enlarges the Band Gap

学校读者我要写书评

暂无评论

SSRN 2023年

作者： Tang, Jian Xing, Wenhao Tang, Chunlan Wu, Jieyun Xia, Mingjun Yin, Wenlong Kang, Bin Deng, Jianguo Institute of Chemical Materials China Academy of Engineering Physics Mianyang621900 China Beijing Center for Crystal Research and Development Key Laboratory of Functional Crystals and Laser Technology Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing100190 China Chengdu611731 China

Two alkaline earth metal-containing thiophosphate compounds, BaAg7(PS4)3 and SrAg7(PS4)3, were synthesized via the homovalent substitution of Pb2+ in PbAg7(PS4)3 by Ba2+ and Sr2+, respectively. The space group of BaAg7(PS4)3 (P21/c) and SrAg7(PS4)3 (P63/m) is the same as the low- and high-temperature phases of PbAg7(PS4)3, respectively. The two compounds exhibit structural similarity and possess three-dimensional honeycomb-shaped architectures. These honeycomb structures are arranged in a layered fashion via hexagonal rings, which arise from the sharing of edges or vertices between [AgS4] and [PS4] tetrahedral, accommodating discrete entities of Ba2+ and Sr2+ cations. BaAg7(PS4)3 melts congruently with a melting point of 760 ℃ and a solidification point of 675 oC, while the melting behaviour of SrAg7(PS4)3 was incongruently and thermally stable up to 689 ℃ under vacuum of 1×10−3 Pa. Moreover, the band gaps of BaAg7(PS4)3 (2.69 eV) and SrAg7(PS4)3 (2.85 eV) have a significant enlargement compared to PbAg7(PS4)3 (2.09 eV). The combination of d10 cation Ag+ with second-order Jahn-Teller distortion and alkaline earth metals cation enriches the system of new metal thiophosphates and provides ideas for exploring other functional materials. © 2023, The Authors. All rights reserved.

关键词： Silver compounds

High Power Pulse laser Reflection Sequence Combination with a Fast Steering Mirror

学校读者我要写书评

暂无评论

Chinese Physics Letters 2019年第7期36卷 52-55页

作者： Ke-Ling Gong Jian Xu Lin Zhang Ya-Ding Guo Bao-Shan Wang Yang Li Shuai Li Zhong-Zheng Chen Lei Yuan Yang Kou Yi-Ting Xu Qin-Jun Peng Key Lab of Solid State Laser Technical Institute of Physics and ChemistryChinese Academy of Sciences University of Chinese Academy of Sciences Key Lab of Function Crystal and Laser Technology Technical Institute of Physics and ChemistryChinese Academy of Sciences

We propose and demonstrate a new approach for a high power pulse laser reflection sequence combination with a fast steering mirror(FSM). This approach possesses significant advantages for lasers combining with a variety of output power, wavelength, pulse duration, repetition rates and polarization. The maximum number of laser routes participating in combination principally depends on the FSM’s adjustment time of the step response, lasers’ repetition rates and pulse duration. A proof-of-principle experiment is performed with two 2-kW level pulsed beams. The results indicate that the combined beam has an excellent pointing stability with rms pointing jitter^8.5μrad. Meanwhile, a high combining efficiency of 98.6% is achieved with maintaining good beam quality.

关键词： demonstrate a new approach sequence combination good beam quality

Classification of hyperspectral images for detection of hepatic carcinoma cells based on spectral-spatial features of nucleus

学校读者我要写书评

暂无评论

Journal of Innovative Optical Health Sciences 2020年第1期3卷 123-131页

作者： Yao Chen Siqi Zhu Shenhe Fu Zhen Li Furong Huang Hao Yin Zhenqiang Chen Guangdong Provincial Engineering Research Center of Crystal and Laser Technology Guangzhou 510632P.R.China Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications Guangzhou 510632P.R.China Department of Optoelectronic Engineering Jinan University Guangzhou 510632P.R.China Guangdong Provincial Key Laboratory of Industrial Ultrashort Pulse Laser Technology Shenzhen 518055.P.R.China

A distinguishing characteristic of normal and cancer cells is the difference in their nuclear chromatin content and *** difference can be revealed by the transmission spectra of nuclei stained with a pH-sensitive ***,we used hematoxylin-eosin(HE)to stain hepatic carcinoma tissues and obtained spectral-spatial data from their nuclei using hyper-spectral *** transmission spectra of the nuclei were then used to train a support vector machine(SVM)model for cell ***,we found that the chromatin distribution in cancer cells is more uniform,because of which the correlation coefficients for the spectra at different points in their nuclei are ***,we exploited this feature to improve the SVM *** sensitivity and specificity for the identification of cancer cells could be increased to 99%and 98%,*** also designed an image-processing method for the extraction of information from cell nuclei to automate the identification process.

关键词： Hyperspectral imaging cancer cells biomedical detection

High-Performance Diode-Tandem-Pumped Actively Q-Switched Tm:Yap laser

学校读者我要写书评

暂无评论

SSRN 2022年

作者： Mao, Jiajia Hu, Ping Zhou, Xue Zhang, Jingkun Wang, Ruihua Nie, Hongkun Bian, Jintian Zhang, Baitao Li, Tao He, Jingliang Yang, Kejian Institute of Novel Semiconductors State Key Laboratory of Crystal Materials Shandong University Jinan250100 China Shandong Provincial Key Laboratory of Laser Technology and Application School of Information Science and Engineering Shandong University Qingdao266237 China School of Collaborative Innovation Center of Light Manipulations and Applications Shandong Normal University Jinan250358 China State Key Laboratory of Pulsed Power Laser Technology National University of Defense Technology Hefei250358 China

A high-performance diode-tandem-pumped actively Q-switched Tm:YAP laser is demonstrated, in which configuration dual Tm:YAP crystals are pumped by two separate diode lasers, respectively. A maximum output power of 10.6 W with corresponding pulse width of 37 ns, pulse energy of 2.12 mJ, and peak power of 57.3 kW is achieved at a pulse repetition rate of 5 kHz. For comparison, an actively Q-switched Tm:YAP laser with a single gain crystal double-end pumped is set up, from which a maximum output power of 6.8 W with a pulse width of 45 ns, a pulse energy of 1.36 mJ and a peak power of 28.3 kW is obtained at the same pulse repetition rate of 5 kHz. The experimental results clearly reveal the effect of diode-tandem-pumping regime on lowering down the thermal load of gain medium. © 2022, The Authors. All rights reserved.

关键词： Q switching

The 10 kW Level High Brightness Face-Pumped Slab Nd:YAG Amplifier with a Hybrid Cooling System

学校读者我要写书评

暂无评论

Chinese Physics Letters 2019年第4期36卷 35-38页

作者： Shuai Li Ya-Ding Guo Zhong-Zheng Chen Lin Zhang Ke-Ling Gong Zhi-Feng Zhang Bao-Shan Wang Jian Xu Yi-Ting Xu Lei Yuan Yang Kou Yang Liu Yan-Yong Lin Qin-Jun Peng Zu-Yan Xu Key Lab of Solid State Laser Technical Institute of Physics and Chemistry Chinese Academy of Sciences University of Chinese Academy of Sciences Key Lab of Function Crystal and Laser Technology Technical Institute of Physics and ChemistryChinese Academy of Sciences

We demonstrate a high power, high brightness, slab amplifier based on face-pumped Nd:YAG slab gain modules,having a high efficient hybrid cooling system of the conduction cooling and forced convection cooling. Using a single gain module, a laser output power up to 4.5 kW with a remarkable optical-optical conversion efficiency of 51% is realized, indicating an excellent lasing performance of the Nd:YAG slab module. The amplifier operates at a repetition rate of 700 Hz and delivers a maximum average output power exceeding 10.5 kW with pulse duration of 150us. A good beam quality factor is measured to be β = 1.9. To the best of our knowledge, this is the highest brightness for a 10 kW level Nd:YAG slab amplifier.

关键词： System Brightness power

2.79 Μm Cr,Er:Ysgg laser with a High Energy Realized by Thermal Bonding and Concave End-Face

学校读者我要写书评

暂无评论

SSRN 2022年

作者： Chen, Yuwei Sun, Dunlu Zhang, Huili Quan, Cong Han, Zhiyuan Qiao, Yang Wang, Zhentao Cheng, Maojie Luo, Jianqiao Crystal Lab of Laser Technology Research Center Anhui Institute of Optics and Fine Mechanics Hefei Institutes of Physical Science Chinese Academy of Sciences Hefei230031 China University of Science and Technology of China Hefei230026 China Advanced Laser Technology Laboratory of Anhui Province Hefei230037 China Key Laboratory of Photonic Devices and Materials Anhui Province Hefei230031 China

We demonstrate the influence of thermal bonding and concave end-face on the 2.79 μm laser performance of Cr,Er:YSGG crystal. The simulation results of temperature distribution suggest that the two pure YSGG crystals bonded on the Cr,Er:YSGG as end-caps are beneficial to improve the heat dissipation capability. The experimental results of thermal focal length show that the thermal effects of un-bonding, planar thermal bonding, and concave thermal bonding Cr,Er:YSGG crystals are in descending tendency. The maximum output energies and slope efficiencies for concave thermal bonding Cr,Er:YSGG crystal are 3.480 J, 3.33%@5 Hz;2.126 J, 3.65%@10 Hz;1.384 J, 3.63%@15 Hz;1.155 J, 3.65%@20 Hz, respectively, and the beam quality factors Mx2/ My2 are determined to be 7.68/8.63. All the results indicate that the thermal bonding and concave end-faces are promising methods to reduce the thermal effect and improve the 2.79 μm high energy laser performance of Cr,Er:YSGG crystal pumped by xenon lamp. © 2022, The Authors. All rights reserved.

关键词： Pumping (laser)

First-Principles Calculation of Kh2po4 Anharmonic Force Constants Phonon Dispersion Curves

学校读者我要写书评

暂无评论

SSRN 2023年

作者： Hao, Guokai Ju, Xin Sun, Xun Liu, Baoan Zhang, Lisong Li, Yanlu Chai, Xiangxu Wei, Lei Wu, Pengcheng Wei, Liening Li, Yang Xu, Mingxia State Key Laboratory of Crystal Materials Shandong University Jinan250100 China Department of Physics University of Science and Technology Beijing Beijing100083 China Laser Fusion Research Center China Academy of Engineering Physics Mianyang621900 China Advanced Materials Institute Qilu University of Technology Shandong Academy of Sciences Jinan250014 China

There are many defects formatted during the growth of potassium dihydrogen phosphate (KDP) crystal. This may have an important impact on the laser damage resistance of KDP crystals. We try to describe the effect of defects by studying the phonon characteristics. The lattice dynamics of KDP crystal with harmonic approximation and anharmonic effect are studied by using the first-principles DFT calculations. The nonlocal van der Waals functional vdW-DF is used to calculate the phonon dispersion curves of KDP crystal. With harmonic approximation, there are three large imaginary frequencies in the PE phase, which are the O-H stretching soft modes leading to the FE-PE phase transition. For the large displacement vibration of H atoms in PE phase, the room-temperature phonon dispersion curves with anharmonic effect are calculated. The large imaginary frequency caused by three O-H stretching soft modes disappears. © 2023, The Authors. All rights reserved.

关键词： Phonons