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| 1 | Mode-locked 2.8-μm fluoride fiber laser:from soliton to breathing pulse显示文摘The mode-locked fluoride fiber laser(MLFFL)is an exciting platform for directly generating ultrashort pulses in the mid-infrared(mid-IR).However,owing to difficulty in managing the dispersion in fluoride fiber lasers,MLFFLs are restricted to the soliton regime,hindering pulse-energy scaling.We overcame the problem of dispersion management by utilizing the huge normal dispersion generated near the absorption edge of an infrared-bandgap semiconductor and promoted MLFFL from soliton to breathing-pulse mode-locking.In the breathing-pulse regime,the accumulated nonlinear phase shift can be significantly reduced in the cavity,and the pulse-energy-limitation effect is mitigated.The breathing-pulse MLFFL directly produced a pulse energy of 9.3 nJ and pulse duration of 215 fs,with a record peak power of 43.3 kW at 2.8μm.Our work paves the way for the pulse-energy and peak-power scaling of mid-IR fluoride fiber lasers,enabling a wide range of applications. | Zhipeng Qin Guoqiang Xie Hongan Gu Ting Hai Peng Yuan Jingui Ma Liejia Qian | 2019 | Advanced Photonics2019，1，6： | 9 |
| 2 | 2.8 μm all-fiber Q-switched and mode-locked lasers with black phosphorus显示文摘In past years, rare-earth-doped fluoride fiber lasers(FFLs) have developed rapidly in the mid-infrared(mid-IR)region. However, due to the lack of fiber optic devices and challenge of fluoride fiber splicing, most mid-IR FFLs have been demonstrated with free-space optic elements, limiting the advantages of all-fiber lasers for flexible delivery, stability, and compactness. Here, we report, to the best of our knowledge, the first pulsed all-fiber FFL in the mid-IR region. By taking advantage of the integration of black phosphorus flake, stable Q-switched and mode-locked pulses were obtained at 2.8 μm wavelength. We believe that this all-fiber design will promote the application of pulsed FFL in the mid-IR region. | ZHIPENG QIN GUOQIANG XIE JINGUI MA PENG YUAN LIEJIA QIAN | 2018 | Photonics Research2018，，11： | 7 |
| 3 | Resveratrol Induces Apoptosis in Human Osteosarcoma MG63 Cells显示文摘OBJECTIVE To investigate apoptosis in human osteosarcoma MG63 cells induced by resveratrol and the molecular mechanism involved.METHODS MG63 cells were treated with different concentrations of resveratrol and transmission electron microscopy was used to observe morphological changes occurring in apoptosis.The MTT method was used to determine the inhibitory rate and flow cytometry was used to assess apoptosis and to analyze the expression of the p21cip1/WAF1 and survivin proteins;the expression of p21cip1/WAF1 and survivin mRNAs was analyzed by the reverse transcriptase polymerase chain reaction(RT-PCR).RESULTS A er resveratrol treatment,the growth of the MG63 cells was significantly inhibited in a time-and dose-dependent fashion.By transmission electron microscopy,the cells displayed morphological changes characteristic of apoptosis,including formation of cytoplasmic vacuoles,chromatin condensation and margination.Flow cytometry showed that the growth of the cells was inhibited a er resveratrol(10 mg/L and 20 mg/L) treatment.The inhibitory rates were(11.9 ± 0.63)% and(19.7 ± 0.88)% respectively.The quantity of treated cells in G0/G1 transition was increased,but the number in the S phase and G2/M transition was decreased.A subdiploid peak was observed.The expression of p21cip1/WAF1 was up-regulated while survivin was down-regulated.CONCLUSION Resveratrol can inhibit growth and induce apoptosis of MG63 cells.Its molecular mechanism might be related to modulation of survivin and p21cip1/WAF1 expression. | Yan Liu Xin Wang Yuxin Xie Jingui Zhang Qingshan Wang Xianhui Xu | 2008 | Chinese Journal of Clinical Oncology2008，5，5： | 1 |
| 4 | Demonstration of 85%pump depletion and 10-6 noise content in quasi-parametric chirped-pulse amplification显示文摘Full pump depletion corresponds to the upper limit of the generated signal photons relative to the pump pulse;this allows the highest peak power to be produced in a unit area of ultraintense laser amplifiers.In practical systems based on optical parametric chirped-pulse amplification,however,the typical pump depletion is only~35%.Here,we report quasi-parametric chirped-pulse amplification(QPCPA)with a specially designed 8-cm-thick Sm∶YCOB crystal that highly dissipates the idler and hence improves pump depletion.We demonstrate 56%QPCPA energy efficiency for an 810-nm signal converted from a 532-nm pump,or equivalently 85%pump depletion.As another advantage,such a record high depletion greatly suppresses the parametric superfluorescence noise in QPCPA to only~1.5×10-6 relative to the amplified signal energy.These results pave the way to beyond the ten-petawatt peak power of the currently most intense lasers. | Jingui Ma Kainan Xiong Peng Yuan Xiaoniu Tu Jing Wang Guoqiang Xie Yanqing Zheng Liejia Qian | 2022 | Light(Science & Applications)2022，11，10： | 1 |
| 5 | Effect of blockchain technology initiatives on firms’market value显示文摘Despite blockchain’s potential to transform corporations by providing new ways of organizing business processes and handling information,extant research pays inadequate attention to how and under what conditions blockchain technology provides additional financial value for shareholders.Drawing on the efficient market hypothesis and signaling theory,we examined the relationship between firms’blockchain use,development announcements,and stock market reactions.We used the event study methodology to analyze a sample of blockchain projects initiated by US firms between 2016 and 2019.The sample contains 114 firm-event observations.The findings show that the average abnormal return over a 2 days event period(including the day of the announcement and the day after the announcement)was positive.This positive stock market reaction is even more substantial when firms announce blockchain projects that focus on saving cost or time.Our findings also indicate that blockchain announcements tend to elicit more positive market reactions from smaller firms.We analyzed 249 firm-event observations containing firms from around the world and conclude that blockchain technology has a non-significant long-term impact on operating performance.The contingency approach adopted in our research provides advice for selecting the right mix of blockchain investment initiatives that is most suitable for a given organizational context. | Haji Suleman Ali Feiyan Jia Zhiyuan Lou Jingui Xie | 2023 | Financial Innovation2023，9，1： | 1 |
| 6 | Spatiotemporally mode-locked soliton fiber laser at 2.8µm显示文摘Spatiotemporal mode-locking creates great opportunity for pulse energy scaling and nonlinear optics research in fiber.Until now,spatiotemporal mode-locking has only been realized in normal-dispersion dissipative soliton and similariton fiber lasers.In this paper,we demonstrated the first experimental realization of a spatiotemporally mode-locked soliton laser in mid-infrared fluoride fiber with anomalous dispersion.The mode-locked fluoride fiber oscillator directly generated a record pulse energy of 16.1 nJ and peak power of 74.6 kW at 2.8µm wavelength.This work extends the spatiotemporal mode-locking to soliton fiber lasers and should have a wide interest for the laser community. | Ying’an Chen Yicheng Zhou Zhipeng Qin Guoqiang Xie Peng Yuan Jingui Ma Liejia Qian | 2023 | High Power Laser Science and Engineering2023，11，5： | 0 |
| 7 | Variability scaling and capacity planning in Covid-19 pandemic显示文摘Capacity planning is a very important global challenge in the face of Covid-19 pandemic.In order to hedge against the fluctuations in the random demand and to take advantage of risk pooling effect,one needs to have a good understanding of the variabilities in the demand of resources.However,Covid-19 predictive models that are widely used in capacity planning typically often predict the mean values of the demands(often through the predictions of the mean values of the confirmed cases and deaths)in both the temporal and spatial dimensions.They seldom provide trustworthy prediction or estimation of demand variabilities,and therefore,are insufficient for proper capacity planning.Motivated by the literature on variability scaling in the areas of physics and biology,we discovered that in the Covid-19 pandemic,both the confirmed cases and deaths exhibit a common variability scaling law between the average of the demand μ and its standard deviationσ,that is,σ ∝ μ^(β),where the scaling parameterμis typically in the range of 0.65 to 1,and the scaling law exists in both the temporal and spatial dimensions.Based on the mechanism of contagious diseases,we further build a stylized network model to explain the variability scaling phenomena.We finally provide simple models that may be used for capacity planning in both temporal and spatial dimensions,with only the predicted mean demand values from typical Covid-19 predictive models and the standard deviations of the demands derived from the variability scaling law. | L.Jeff Hong Guangwu Liu Jun Luo Jingui Xie | 2023 | Fundamental Research2023，3，4： | 0 |
| 8 | Influence of Hydrogen on the Thermoelastic Properties of the Major Rock-Forming Minerals in the Upper Mantle显示文摘Objective Anhydrous mineral phases in the Earth's upper mantle may serve as a large internal reservoir of water that has profound implications for the Earth's evolution as a water planet.Water plays important roles in the phase transformation kinetics in the Earth's interior,which affects the mantle dynamics.However,the influence of water content in the major rock-forming minerals on | FAN Dawei KUANG Yunqian XU Jingui ZHANG Bo XIE Hongsen | 2016 | Acta Geologica Sinica(English Edition)2016，90，5： | 0 |
| 9 | Research of Anti-sway System for ARMG Based on Input-shaping Control Method显示文摘 | Gang Liu Jingui Luo Ch un Xie Christian Sponfeldner | 2015 | 机械工程与设计(中英文版)2015，4，1： | 0 |
| 10 | Toward 5.2μm terawatt few-cycle pulses via optical parametric chirped-pulse amplification with oxide La3Ga5.5Nb0.5O14crystals显示文摘High-power femtosecond lasers beyond 5μm are attractive for strong-field physics with mid-infrared(IR)fields but are difficult to scale up.In optical parametric chirped-pulse amplification(OPCPA)at mid-IR wavelengths,a nonlinear crystal is vital,and its transmittance,dispersion,nonlinear coefficient and size determine the achievable power and wavelength.OPCPA beyond 5μm routinely relies on semiconductor crystals because common oxide crystals are not transparent in this spectral range.However,the small size and low damage threshold of semiconductor crystals fundamentally limit the peak power to gigawatts.In this paper,we design a terawatt-class OPCPA system at 5.2μm based on a new kind of oxide crystal of La3Ga5.5Nb0.5O14(LGN).The extended transparent range,high damage threshold,superior phase-matching characteristics and large size of LGN enable the generation of 0.13 TW seven-cycle pulses at5.2μm.This design fully relies on the state-of-the-art OPCPA technology of an octave-spanning ultrafast Ti:sapphire laser and a thin-disk Yb:YAG laser,offering the performance characteristics of high power,a high repetition rate and a stable carrier-envelope phase. | Jinsheng Liu Jingui Ma Jing Wang Peng Yuan Guoqiang Xie Liejia Qian | 2019 | High Power Laser Science and Engineering2019，7，4： | 0 |
| 11 | Optical modification of nonlinear crystals for quasi-parametric chirped-pulse amplification显示文摘Quasi-parametric chirped-pulse amplification(QPCPA),which features a theoretical peak power much higher than those obtained with Ti:sapphire laser or optical parametric chirped-pulse amplification,is promising for future ultra-intense lasers.The doped rare-earth ion used for idler dissipation is critical for effective QPCPA,but is usually not compatible with traditional crystals.Thus far,only one dissipative crystal of Sm^(3+)-doped yttrium calcium oxyborate has been grown and applied.Here we introduce optical means to modify traditional crystals for QPCPA applications.We theoretically demonstrate two dissipation schemes by idler frequency doubling and sum-frequency generation with an additional laser.In contrast to absorption dissipation,the proposed nonlinear dissipations ensure not only high signal efficiency but also high small-signal gain.The demonstrated ability to optically modify crystals will facilitate the wide application of QPCPA. | Qian Lin Jingui Ma Zhe Yin Peng Yuan Jing Wang Guoqiang Xie Liejia Qian | 2024 | Fundamental Research2024，4，1： | 0 |
| 12 | Thermoelasticity and stability of natural epidote at high pressure and high temperature:Implications for water transport during cold slab subduction显示文摘Epidote is a typical hydrous mineral in subduction zones.Here,we report a synchrotron-based single-crystal X-ray diffraction(XRD)study of natural epidote[Ca1.97Al2.15Fe0.84(SiO4)(Si2O7)O(OH)]under simultaneously high pressure-temperature(high P-T)conditions to~17.7 GPa and 700 K.No phase transition occurs over this P-T range.Using the third-order Birch-Murnaghan equation of state(EoS),we fitted the pressure-volume-temperature(P-V-T)data and obtained the zero-pressure bulk modulus K_(0)=138(2)GPa,its pressure derivative K'_(0)=3.0(3),the temperature derivative of the bulk modulus((∂K/∂T)P=-0.004(1)GPa/K),and the thermal expansion coefficient at 300 K(α_(0)=3.8(5)×10^(-5)K^(-1)),as the zero-pressure unit-cell volume V_(0)was fixed at 465.2(2)Å^(3)(obtained by a single-crystal XRD experiment at ambient conditions).This study reveals that the bulk moduli of epidote show nonlinear compositional dependence.By discussing the stabilization of epidote and comparing its density with those of other hydrous minerals,we find that epidote,as a significant water transporter in subduction zones,may maintain a metastable state to~14 GPa along the coldest subducting slab geotherm and promote slab subduction into the upper mantle while favoring slab stagnation above the 410 km discontinuity.Furthermore,the water released from epidote near 410 km may potentially affect the properties of the 410 km seismic discontinuity. | Bo Li Jingui Xu Dongzhou Zhang Zhilin Ye Shijie Huang Dawei Fan Wenge Zhou Hongsen Xie | 2021 | Geoscience Frontiers2021，12，2： | 0 |
| 13 | Single-shot cross-correlator for pulse-contrast characterization of high peak-power lasers显示文摘Pulse contrast is a crucial parameter of high peak-power lasers since the prepulse noise may disturb laser–plasma interactions. Contrast measurement is thus a prerequisite to tackle the contrast challenge in high peak-power lasers.This paper presents the progress review of single-shot cross-correlator(SSCC) for real-time contrast characterization.We begin with the key technologies that enable an SSCC to simultaneously possess high dynamic range(1010), large temporal window(50–70 ps) and high fidelity. We also summarize the instrumentation of SSCC prototypes and their applications on five sets of petawatt laser facilities in China. Finally, we discuss how to extend contrast measurements from time domain to spatiotemporal domain. Real-time and high-dynamic-range contrast measurements, provided by SSCC, can not only characterize various complex noises in high peak-power lasers but also guide the system optimization. | Jingui Ma Peng Yuan Jing Wang Guoqiang Xie Heyuan Zhu Liejia Qian | 2018 | High Power Laser Science and Engineering2018，6，4： | 0 |
| 14 | Large temporal window and high-resolution single-shot cross-correlator with two separate measurement channels显示文摘In strong-field physics experiments with ultraintense lasers,a single-shot cross-correlator(SSCC)is essential for fast optimization of the pulse contrast and meaningful comparison with theory for each pulse shot.To simultaneously characterize an ultrashort pulse and its long pedestal,the SSCC device must have both a high resolution and a large temporal window.However,the resolution and window in all kinds of single-shot measurement contradict each other in principle.Here we propose and demonstrate a novel SSCC device with two separate measurement channels:channel-1 for the large-window pedestal measurement has a moderate resolution but a large window,while channel-2 for the ultrashort pulse measurement has a small window but a high resolution;this allows the accurate characterization of the pulse contrast in a single shot.A two-channel SSCC device with a 200-fs resolution and 114-ps window has been developed and tested for its application in ultraintense lasers at 800 nm. | Jingui Ma Xiaoping Ouyang Liangze Pan Peng Yuan Dongfang Zhang Jing Wang Guoqiang Xie Jianqiang Zhu Liejia Qian | 2022 | High Power Laser Science and Engineering2022，10，6： | 0 |
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