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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 | Tunable and switchable harmonic h-shaped pulse generation in a 3.03 km ultralong mode-locked thulium-doped fiber laser显示文摘We experimentally demonstrated a type of tunable and switchable harmonic h-shaped pulse generation in a thulium-doped fiber(TDF) laser passively mode locked by using an ultralong nonlinear optical loop mirror.The total cavity length was ~3.03 km, the longest ever built for a TDF laser to our best knowledge, which resulted in an ultralarge anomalous dispersion over -200 ps^2 around the emission wavelength. The produced h-shaped pulse can operate either in a fundamental or in a high-order harmonic mode-locking(HML) state depending on pump power and intra-cavity polarization state(PS). The pulse duration, no matter of the operation state, was tunable with pump power. However, pulse breaking and self-organizing occurred, resulting in high-order HML,when the pump power increased above a threshold. At a fixed pump power, the order of HML was switchable from one to another by manipulating the PS. Switching from the 8 th up to the 48 th order of HML was achieved with a fixed pump power of ~4.15 W. Our results revealed the detailed evolution and switching characteristics of the HML and individual pulse envelope with respect to both the pump power and PS. We have also discussed in detail the mechanisms of both the h-shaped pulse generation and the switching of its HML. This contribution would be helpful for further in-depth study on the underlying dynamics of long-duration particular-envelope pulses with ultralarge anomalous dispersion and ultralong roundtrip time. | JUNQING ZHAO LEI LI LUMING ZHAO DINGYUAN TANG DEYUAN SHEN LEI SU | 2019 | Photonics Research2019，7，3： | 4 |
| 3 | Watt-level broadly wavelength tunable mode-locked solid-state laser in the 2 μm water absorption region显示文摘We report on broadly wavelength-tunable passive mode-locking with high power operating at the 2 μm water absorption band in a Tm:CYA crystal laser. With a simple quartz plate, stable mode-locking wavelengths can be tuned from 1874 to 1973 nm, with a tunable wavelength range up to ~100 nm and maximum output power up to 1.35 W. The bandwidth is narrow as ~6 GHz, corresponding to a high coherence. To our knowledge, this is the first demonstration of wavelength-tunable mode-locking with watt-level in the 2 μm water absorption band.The high temporal coherent laser can be further applied in spectroscopy, the efficient excitation of molecules, sensing, and quantum optics. | WEI ZHOU XIAODONG XU RUI XU XULIANG FAN YONGGUANG ZHAO LEI LI DINGYUAN TANG DEYUAN SHEN | 2017 | Photonics Research2017，5，6： | 3 |
| 4 | 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 |
| 5 | Magnetic resonance (MR) safety and compatibility of a novel iron bioresorbable scaffold显示文摘Fully bioresorbable scaffolds have been designed to overcome the limitations of traditional drug-eluting stents(DESs),which permanently cage the native vessel wall and pose possible complications.The ultrathin-strut designed sirolimus-eluting iron bioresorbable coronary scaffold system(IBS)shows comparable mechanical properties to traditional DESs and exhibits an adaptive degradation profile during target vessel healing,which makes it a promising candidate in all-comers patient population.For implanted medical devices,magnetic resonance(MR)imaging properties,including MR safety and compatibility,should be evaluated before its clinical use,especially for devices with intrinsic ferromagnetism.In this study,MR safety and compatibility of the IBS scaffold were evaluated based on a series of well-designed in-vitro,ex-vivo and in-vivo experiments,considering possible risks,including scaffold movement,over-heating,image artifact,and possible vessel injury,under typical MR condition.Traditional ASTM standards for MR safety and compatibility evaluation of intravascular devices were referred,but not only limited to that.The unique time-relevant MR properties of bioresorbable scaffolds were also discussed.Possible forces imposed on the scaffold during MR scanning and MR image artifacts gradually decreased along with scaffold degradation/absorption.Rigorous experiments designed based on a scientifically based rationale revealed that the IBS scaffold is MR conditional,though not MR compatible before complete absorption.The methodology used in the present study can give insight into the MR evaluation of magnetic scaffolds(bioresorbable)or stents(permanent). | Dong Bian Li Qin Wenjiao Lin Danni Shen Haiping Qi Xiaoli Shi Gui Zhang Hongwei Liu Han Yang Jin Wang Deyuan Zhang Yufeng Zheng | 2020 | Bioactive Materials2020，5，2： | 2 |
| 6 | Absorption characteristics of highpower disc fiber laser by side pumping of laser diode显示文摘 | Nam Seong Kim Mahendra Prabhu Cheng Li Jie Song Deyuan Shen and Ken ichi Ueda | 1999 | Lasers and Electro Optics1999，3，9： | 1 |
| 7 | Fabrication and optical properties of highly transparent Er : YAG poly- crystalline ceramics for eye-safe solid-state lasers显示文摘 | Qin Xianpeng Yang Hao Shen Deyuan | 2013 | Int J Appl Ceram Techn2013，10，： | 1 |
| 8 | Planar split dual gate MOSFET显示文摘A new planar split dual gate (PSDG) MOSFET device, its characteristics and ex-perimental results, as well as the three dimensional device simulations, are re- ported here for the first time. Both theoretical calculation and 3D simulation, as well as the experiment data, show that the two independent split dual gates can provide dynamical control of the device characteristics, such as threshold voltage (Vt) and sub-threshold swing (SS), as well as the device saturated current. The PSDG MOSFET transistor leakage current (Ioff) can be reduced as much as 78% of the traditional single gate MOSFET. The PSDG is fabricated and fully compatible with our conventional 0.18 μm logic process flow. | XIAO DeYuan CHEN Gary LEE Roger LIU Yung SHEN ChiCheong | 2008 | Science in China(Series F)2008，51，4： | 1 |
| 9 | Diode-pumped Q-switched Tm:YAG Laser in Active Mirror Configuration显示文摘 | Cheng Li Jie Song Deyuan Shen | 2000 | Proceeding of SPIE2000，3889，： | 1 |
| 10 | Flash-lamp Pumped Normal-mode and Q-switched Cr-Tm:YAG Laser Performance at Room Temperature显示文摘 | Cheng Li Deyuan Shen Jie Song | 1999 | Optics Communication1999，164，： | 1 |
| 11 | Spectrum narrowing of high power Tm:fiber laser using a volume Bragg grating显示文摘 | Wang Fei Shen Deyuan Fan Dianyuan | 2010 | Opt Express2010，18，9： | 1 |
| 12 | Enhanced flow sensing with interfacial microstructures显示文摘Biological flow receptors show astonishing performance and are used as models for the design of novel flow sensors.However,the functional importance of interfacial microstructures is seldom discussed in previous review papers.Herein,this review summarises the underlying biomechanical principles in the biological flow receptors and describes the recent progress in bio-inspired flow sensors,in which the underlying sensing-enhancement mechanisms are emphasised. | Yonggang Jiang Peng Zhao Zhiqiang Ma Dawei Shen Gongchao Liu Deyuan Zhang | 2020 | Biosurface and Biotribology2020，6，1： | 0 |
| 13 | Novel transparent ceramics for solid-state lasers显示文摘Recent progress on rare-earth doped polycrystalline YAG transparent ceramics has made them an alternative novel solid-state laser gain material. In this paper, we present results of our research on polycrystalline RE:YAG transparent ceramics. High optical quality YAG ceramics doped with various rare-earth(RE) ions such as Nd3+, Yb3+, Er3+,Tm3+, and Ho3+have been successfully fabricated using the solid-state reactive sintering method. Highly efficient laser oscillations of the fabricated ceramics are demonstrated. | Hao Yang Jian Zhang Dewei Luo Hui Lin Deyuan Shen Dingyuan Tang | 2013 | High Power Laser Science and Engineering2013，1，Z1： | 0 |
| 14 | Microfabrication of functional polyimide films and microstructures for flexible MEMS applications显示文摘Polyimides are widely used in the MEMS and flexible electronics fields due to their combined physicochemical properties,including high thermal stability,mechanical strength,and chemical resistance values.In the past decade,rapid progress has been made in the microfabrication of polyimides.However,enabling technologies,such as laser-induced graphene on polyimide,photosensitive polyimide micropatterning,and 3D polyimide microstructure assembly,have not been reviewed from the perspective of polyimide microfabrication.The aims of this review are to systematically discuss polyimide microfabrication techniques,which cover flm formation,material conversion,micropatterning,3D microfabrication,and their applications.With an emphasis on polyimide-based flexible MEMS devices,we discuss the remaining technological challenges in polyimide fabrication and possible technological innovations in this field. | Zihao Dong Qipei He Dawei Shen Zheng Gong Deyuan Zhang Wenqiang Zhang Takahito Ono Yonggang Jiang | 2023 | Microsystems & Nanoengineering2023，9，2： | 0 |
| 15 | Bio-inspired Flexible Airflow Sensor with Self-bended 3D Hair-like Configurations显示文摘This paper presents a novel flexible airflow sensor based on four curved microcantilevers arranged in a cross-form configuration.A self-bending method based on MEMS technology has been used to fabricate the curved microcantilevers structure,and this method can transfer a 2D plane structure into a 3D structure with good consistency in the morphology.The curved microcantilever consists of a polyimide(PI)top layer,silicon(Si)bottom layer,and platinum(Pt)piezoresistor at the root of the cantilever.The difference in the in-plane residual stress between the PI and Si layers bent the microcantilever upward.The curved-up microcantilever transfers the fluidic momentum that acts on it to drag force,which deflects the curved-up microcantilever and changes the resistance of the piezoresistor.To realize temperature compensation and decrease the noise,a reference resistor and an ambient temperature detector were integrated for the Wheatstone half-bridge measurement and temperature monitoring,respectively.The cross-form configuration of the curved-up cantilevers has high sensitivity advantages and possesses direction-sensing ability.Experimental results show that the sensitivity of the sensors increased as a function of the airflow velocity,and the sensors exhibited a maximum resolution of 4 mm⋅s^(−1) and a maximum sensitivity of 60.35 mV⋅(ms^(−1))^(−1) when the airflow velocity was larger than 38.5 m⋅s^(−1). | Dawei Shen Yonggang Jiang Zhiqiang Ma Peng Zhao Zheng Gong Zihao Dong Deyuan Zhang | 2022 | Journal of Bionic Engineering2022，19，1： | 0 |
| 16 | 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 |
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