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| 1 | 35 W continuous-wave Ho:YAG single-crystal fiber laser显示文摘We report on a high-power Ho:YAG single-crystal fiber(SCF)laser inband pumped by a high-brightness Tm-fiber laser at 1908 nm.The Ho:YAG SCF grown by the micro-pulling-down technique exhibits a propagation loss of 0.05±0.005 cm^-1 at 2.09μm.A continuous-wave output power of 35.2 W is achieved with a slope efficiency of 42.7%,which is to the best of our knowledge the highest power ever reported from an SCF-based laser in the 2µm spectral range. | Yongguang Zhao Li Wang Weidong Chen Jianlei Wang Qingsong Song Xiaodong Xu Ying Liu Deyuan Shen Jun Xu Xavier Mateos Pavel Loiko Zhengping Wang Xinguang Xu Uwe Griebner Valentin Petrov | 2020 | High Power Laser Science and Engineering2020，8，2： | 7 |
| 2 | Generation of 84-fs pulses from a mode-locked Tm:CNNGG disordered garnet crystal laser显示文摘A mode-locked laser based on a Tm:CNNGG disordered crystal as an active medium and a single-walled carbon nanotube saturable absorber is demonstrated, operating at a central wavelength of 2018 nm. Transformlimited 84 fs pulses are generated with an average output power of 22 mW at a repetition rate of ~90 MHz.A maximum output power of 98 mW is obtained at a slightly longer pulse duration of 114 fs. | ZHONGBEN PAN YICHENG WANG YONGGUANG ZHAO HUALEI YUAN XIAOJUN DAI HUAQIANG CAI JI EUN BAE SUN YOUNG CHOI FABIAN ROTERMUND XAVIER MATEOS JOSEP MARIA SERRES PAVEL LOIKO UWE GRIEBNER VALENTIN PETROV | 2018 | Photonics Research2018，6，8： | 4 |
| 3 | Structured laser beams: toward 2-μm femtosecond laser vortices显示文摘Structured ultrashort-pulse laser beams, and in particular eigenmodes of the paraxial Helmholtz equation, are currently extensively studied for novel potential applications in various fields, e.g., laser plasma acceleration,attosecond science, and fine micromachining. To extend these prospects further, in the present work we push forward the advancement of such femtosecond structured laser sources into the 2-μm spectral region. Ultrashortpulse Hermite– and Laguerre–Gaussian laser modes both with a pulse duration around 100 fs are successfully produced from a compact solid-state laser in combination with a simple single-cylindrical-lens converter. The negligible beam astigmatism, the broad optical spectra, and the almost chirp-free pulses emphasize the high reliability of this laser source. This work, as a proof of principle study, paves the way toward few-cycle pulse generation of optical vortices at 2 μm. The presented light source can enable new research in the fields of interaction with organic materials, next generation optical detection, and optical vortex infrared supercontinuum. | Yongguang Zhao Li Wang Weidong Chen Pavel Loiko Xavier Mateos Xiaodong Xu Ying Liu Deyuan Shen Zhengping Wang Xinguang Xu Uwe Griebner Valentin Petrov | 2021 | Photonics Research2021，9，3： | 3 |
| 4 | 单斜结构的Yb:KLu(WO4)2晶体光谱和激光性质的各向异性显示文摘研究了Yb:KLu(WO4)2晶体对非偏振抽运光的吸收以及连续波激光振荡性质.晶体结构的低对称性导致晶体光谱呈强烈各向异性,最强的吸收和发射都发生在平行于Nm主轴的偏振方向上.Ng切向晶体具有最高的非偏振抽运光吸收效率和最大的激光功率产生潜力,2mm长的晶体产生的最高连续波输出功率为11W,相对于吸收抽运功率,光—光转换效率为68%,而斜率效率则达80%. | 万勇 韩文娟 刘均海 夏临华 Xavier Mateos Valentin Petrov 张怀金 王继扬 | 2009 | 物理学报2009，58，1： | 2 |
| 5 | 掺Yb钒酸盐晶体激光振荡中的光学双稳态现象研究显示文摘研究了三种掺Yb钒酸盐晶体Yb:LuVO4,Yb:YVO4和Yb:GdVO4的激光振荡中所呈现的光学双稳态效应.以晶体所吸收的抽运功率表征的双稳区宽度ΔPabs可超过1W,在双稳区高功率一侧的边界,即激光振荡的上阈值点,出现激光输出功率的不连续变化或跃变,同时发生亚毫秒时间尺度上的大幅度强度涨落.谐振腔的输出耦合透过率、晶体长度、晶体中的热效应等对双稳态效应均具有重要影响. | 刘均海 万勇 韩文娟 杨红卫 张怀金 王继扬 Valentin Petrov | 2010 | 物理学报2010，59，1： | 2 |
| 6 | Surface structure of stainless and Hadfield steel after impact显示文摘 | Yuri N Petrov Valentin G Gavriljuk Hans Berns | 2006 | Wear2006，260，6： | 1 |
| 7 | 万勇、韩文娟、刘均海、夏临华、XavierMateos、ValentlnPetrov、张怀金、王继扬显示文摘 | 万勇 韩文娟 刘均海 夏临华 Xavier Mateos Valentin Petrov 张怀金 王继扬 | 2009 | 物理学报2009，，1： | 1 |
| 8 | Power-scalable sub-100-fs Tm laser at 2.08μm显示文摘We report on a power-scalable sub-100-fs laser in the 2-μm spectral range using a Tm;-doped‘mixed’(Lu,Sc);O;sesquioxide ceramic as an active medium.Pulses as short as 58 fs at 2076 nm with an average output power of 114 mW at a pulse repetition rate of approximately 82.9 MHz are generated by employing single-walled carbon nanotubes as a saturable absorber.A higher average power of 350 m W at 2075 nm is obtained at the expense of the pulse duration(65 fs).A maximum average power of 486 mW is achieved for a pulse duration of 98 fs and an optical conversion efficiency of 22.3%,representing the highest value ever reported from sub-100-fs mode-locked Tm lasers. | Li Wang Weidong Chen Yongguang Zhao Hanlin Yang Wei Jing Zhongben Pan Hui Huang Jiachen Liu Ji Eun Bae Fabian Rotermund Pavel Loiko Xavier Mateos Zhengping Wang Xinguang Xu Uwe Griebner Valentin Petrov | 2021 | High Power Laser Science and Engineering2021，9，4： | 1 |
| 9 | Liquid chromatography method for simultaneous analysis of amino acids and biogenic amines in biological fluids with simultaneous gradient of pH and acetonitrile显示文摘 | Valentin Lozanov Bistra Benkova Lyudmila Mateva Stefan Petrov Elenko Popov Chavdar Slavov Vanio Mitev | 2007 | Journal of Chromatography B2007，，1： | 1 |
| 10 | Passively Q-switched femtosecond-laser-written thulium waveguide laser based on evanescent field interaction with carbon nanotubes显示文摘Surface channel waveguides(WGs) were fabricated in a monoclinic Tm^(3+):KLu(WO_4)_2 crystal by femtosecond direct laser writing(fs-DLW). The WGs consisted of a half-ring cladding with diameters of 50 and 60 μm located just beneath the crystal surface. They were characterized by confocal laser microscopy and μ-Raman spectroscopy,indicating a reduced crystallinity and stress-induced birefringence of the WG cladding. In continuous-wave(CW)mode, under Ti:sapphire laser pumping at 802 nm, the maximum output power reached 171.1 mW at 1847.4 nm,corresponding to a slope efficiency η of 37.8% for the 60 μm diameter WG. The WG propagation loss was0.7 0.3 d B∕cm. The top surface of the WGs was spin-coated by a polymethyl methacrylate film containing randomly oriented(spaghetti-like) arc-discharge single-walled carbon nanotubes serving as a saturable absorber based on evanescent field coupling. Stable passively Q-switched(PQS) operation was achieved. The PQS60 μm diameter WG laser generated a record output power of 150 m W at 1846.8 nm with η = 34.6%. The conversion efficiency with respect to the CW mode was 87.6%. The best pulse characteristics(energy/duration)were 105.6 nJ/98 ns at a repetition rate of 1.42 MHz. | ESROM KIFLE PAVEL LOIKO JAVIER RODRíGUEZ VáZQUEZ DE ALDANA CAROLINA ROMERO AIRáN RóDENAS SUN YUNG CHOI JI EUN BAE FABIAN ROTERMUND VIKTOR ZAKHAROV ANDREY VENIAMINOV MAGDALENA AGUILó FRANCESC DíAZ UWE GRIEBNER VALENTIN PETROV XAVIER MATEOS | 2018 | Photonics Research2018，6，10： | 1 |
| 11 | Efficient continuous-wave and Q-switched operation of a diode-pumped Yb:KLu(WO4)2 laser with self-Raman conversion显示文摘 | Liu J H Griebner Uwe Petrov Valentin Zhang H J Zhang J X Wang J Y | | 0，，： | 1 |
| 12 | 不同组分的钒酸盐混晶Ybt:YxGd1-t-xVO4光谱与激光性质的比较研究显示文摘研究了三种掺Yb钒酸盐混晶Yb0.005:Y0.298Gd0.697VO4,Yb0.007:Y0.407Gd0.586VO4和Yb0.009:Y0.575Gd0.416VO4的室温偏振吸收谱和发射谱.结果表明,最强的吸收和发射相应于π偏振,位于波长985nm;随组分不同,最大吸收截面σabs=4.8—8.5×10-20cm2,吸收带宽9.5—9.9nm;最大受激发射截面σem=5.8—10.3×10-20cm2.利用高亮度半导体激光器纵向抽运实现了室温下的连续波激光运转.研究发现,不同混晶的激光振荡行为存在很大差异:在谐振腔输出耦合透过率T=2%条件下,Yb0.005:Y0.298Gd0.697VO4和Yb0.009:Y0.575Gd0.416VO4的激光振荡随抽运功率降低而出现σ,π偏振态的共存和转变;而Yb0.007:Y0.407Gd0.586VO4的激光振荡则保持π偏振态不变.在T=5%情形,Yb0.009:Y0.575Gd0.416VO4的激光振荡为单纯的σ偏振;而Yb0.005:Y0.298Gd0.697VO4所产生的激光振荡随抽运功率下降仍出现类似的偏振态变化行为. | 刘均海 韩文婿 张怀金 王继扬 Xavier Mateos Valentin Petrov | 2011 | 物理学报2011，60，1： | 0 |
| 13 | Structured laser beams: toward 2-μm femtosecond laser vortices: publisher’s note显示文摘 | Yongguang Zhao Li Wang Weidong Chen Pavel Loiko Xavier Mateos Xiaodong Xu Ying Liu Deyuan Shen Zhengping Wang Xinguang Xu Uwe Griebner Valentin Petrov | 2021 | Photonics Research2021，9，7： | 0 |
| 14 | Direct amplification of femtosecond optical vortices in a single-crystal fiber显示文摘Spatially twisted light with femtosecond temporal structure is of particular interest in strong-field physics and light–matter interactions.However,present femtosecond vortex sources exhibit limited power handling capabilities,and their amplification remains an ongoing challenge particularly for high-order orbital angular momentum(OAM)states due to several inherent technical difficulties.Here,we exploit a straightforward approach to directly amplify a femtosecond optical vortex(FOV,OAM=-8?)by using a two-stage single-crystal fiber(SCF)amplifier system without pulse stretching and compression in the time domain,delivering 23-W,163-fs pulses at a repetition rate of1 MHz.The spatial and temporal features are well-conserved during the amplification,as well as the high modal purity(>96%).The results indicate that the multi-stage SCF amplifier system is particularly suited for direct amplification of high-order FOVs.The generated high-power femtosecond OAM laser beams are expected to help reveal complex physical phenomena in light–matter interactions and pave the way for practical applications in attoscience,laser plasma acceleration,and high-dimension micromachining. | CHANGSHENG ZHENG TIANYI DU LEI ZHU ZHANXIN WANG KANGZHEN TIAN YONGGUANG ZHAO ZHIYONG YANG HAOHAI YU VALENTIN PETROV | 2024 | Photonics Research2024，12，1： | 0 |
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