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| 1 | Single whispering-gallery mode lasing in polymer bottle microresonators via spatial pump engineering显示文摘Single-mode lasing in whispering-gallery mode(WGM)microresonators is challenging to achieve.In bottle microresonators,the highly non-degenerated WGMs are spatially well-separated along the long-axis direction and provide mode-selection capability.In this work,by engineering the pump intensity to modify the spatial gain profiles of bottle microresonators,we demonstrate a simple and general approach to realizing single-mode WGM lasing in polymer bottle microresonators.The pump intensity is engineered into an interference distribution on the bottle microresonator surface.By tuning the spacing between axial positions of the interference pump patterns,the mode intensity profiles of single-bottle WGMs can be spatially overlapped with the interference stripes,intrinsically enabling single-mode lasing and selection.Attractive advantages of the system,including high sidemode suppression factors 420 dB,large spectral tunability 48 nm,low-lasing threshold and reversible control,are presented.Our demonstrated approach may have a variety of promising applications,ranging from tunable single-mode lasing and sensing to nonlinear optics. | Fuxing Gu Fuming Xie Xing Lin Shuangyi Linghu Wei Fang Heping Zeng Limin Tong Songlin Zhuang | 2017 | Light(Science & Applications)2017，6，1： | 17 |
| 2 | Simultaneous mineralization of CO_2 and recovery of soluble potassium using earth-abundant potassium feldspar显示文摘CO2 capture and storage(CCS) is an important strategy in combatting anthropogenic climate change.However,commercial application of the CCS technique is currently hampered by its high energy expenditure and costs.To overcome this issue,CO2 capture and utilization(CCU) is a promising CO2 disposal method.We,for the first time,developed a promising method to mineralize CO2 using earth-abundant potassium feldspar in order to effectively reduce CO2 emissions.Our experiments demonstrate that,after adding calcium chloride hexahydrate as an additive,the K-feldspar can be transformed to Ca-silicates at 800 C,which can easily mineralize CO2 to form stable calcium carbonate and recover soluble potassium.The conversion of this process reached 84.7%.With further study,the pretreatment temperature can be reduced to 250 C using hydrothermal method by adding the solution of triethanolamine(TEA).The highest conversion can be reached 40.1%.The process of simultaneous mineralization of CO2 and recovery of soluble potassium can be easily implemented in practice and may provide an economically feasible way to tackle global anthropogenic climate change. | XIE HePing WANG YuFei JU Yang LIANG Bin ZHU JiaHua ZHANG Ru XIE LingZhi LIU Tao ZHOU XiangGe ZENG HongMei LI Chun LU HouFang | 2013 | Chinese Science Bulletin2013，58，1： | 16 |
| 3 | Single-photon detection and its applications显示文摘A single-photon detector is an extremely sensitive device capable of registering photons,offering essential technical support for optics quantum information applications.We review herein our recent experimental progress in the development and application of single-photon detection techniques.Techniques based on advanced self-differencing,low-pass filtering,frequency up-conversion and photon-number-resolving are introduced for attaining high-speed,high-efficiency,low-noise single-photon detection at infrared wavelengths.The advantages of high-speed single-photon detection are discussed in some applications,such as the laser ranging and quantum key distribution.The photon-number-resolving detection is shown to support efficient quantum random number generation. | LIANG Yan ZENG HePing | 2014 | Science China(Physics,Mechanics & Astronomy)2014，57，7： | 8 |
| 4 | Plasma-grating-induced breakdown spectroscopy显示文摘.Laser-induced breakdown spectroscopy(LIBS)is a useful tool for determination of elements in solids,liquids,and gases.For nanosecond LIBS(ns-LIBS),the plasma shielding effect limits its reproducibility,repeatability,and signal-to-noise ratios.Although femtosecond laser filament induced breakdown spectroscopy(FIBS)has no plasma shielding effects,the power density clamping inside the filaments limits the measurement sensitivity.We propose and demonstrate plasma-grating-induced breakdown spectroscopy(GIBS).The technique relies on a plasma excitation source-a plasma grating generated by the interference of two noncollinear femtosecond filaments.We demonstrate that GIBS can overcome the limitations of standard techniques such as ns-LIBS and FIBS.Signal intensity enhancement with GIBS is observed to be greater than 3 times that of FIBS.The matrix effect is also significantly reduced with GIBS,by virtue of the high power and electron density of the plasma grating,demonstrating great potential for analyzing samples with complex matrix. | Mengyun Hu Junsong Peng Sheng Niu Heping Zeng | 2020 | Advanced Photonics2020，2，6： | 5 |
| 5 | Highly efficient difference-frequency generation for mid-infrared pulses by passively synchronous seeding显示文摘We have proposed and experimentally demonstrated a novel scheme for efficient mid-infrared difference-frequency generation based on passively synchronized fiber lasers. The adoption of coincident seeding pulses in the nonlinear conversion process could substantially lower the pumping threshold for mid-infrared parametric emission. Consequently,a picosecond mid-infrared source at 3.1 μm was prepared with watt-level average power, and a maximum power conversion efficiency of 77% was realized from pump to down-converted light. Additionally, the long-term stability of generated power was manifested with a relative fluctuation as low as 0.17% over one hour. Thanks to the all-optical passive synchronization and all-polarization-maintaining fiber architecture, the implemented laser system was also featured with simplicity, compactness and robustness, which would favor subsequent applications beyond laboratory operation. | Kun Huang Yinqi Wang Jianan Fang Huaixi Chen Minghang Xu Qiang Hao Ming Yan Heping Zeng | 2021 | High Power Laser Science and Engineering2021，9，1： | 4 |
| 6 | Time-division phase modulated single-photon interference in a Sagnac interferometer显示文摘We introduce a stable, long-distance single- photon Sagnac interferometer, which has a balanced con-figuration to efficiently compensate phase drift caused by change of the fiber-optic path. By using time-division phase modulation, single-photon interference was realized at 1550 nm in a 5-km-long as well as 27-km-long Sagnac fiber loops, with a fringe visibility higher than 90% and long-term sta-bility. The stable performance of the single-photon interfer-ence indicated that the time-division phase-modulated Sag- nac interferometer might readily lead to practical applica-tions in single-photon routing and quantum cryptography. | WU Guang, ZHOU Chunyuan & ZENG Heping Key Laboratory of Optical and Magnetic Resonance Spectroscopy and Department of Physics, East China Normal University, Shanghai 200062, China Correspondence should be addressed to Zeng Heping (e-mail: hpzeng @phy.ecnu.edu.cn) | 2003 | Chinese Science Bulletin2003，48，16： | 4 |
| 7 | Low-noise InGaAs/InP single-photon detector with widely tunable repetition rates显示文摘InGaAs/InP avalanche photodiodes typically work in the gated Geiger mode to achieve near-infrared singlephoton detection. By using ultrashort gates and combining with the robust spike-canceling technique that consists of the capacitance-balancing and low-pass filtering technique, we demonstrate an InGaAs/InP single-photon detector(SPD) with widely tunable repetition rates in this paper. The operation frequency could be tuned conveniently from 100 MHz to 1.25 GHz with the SPD's performance measured to maintain good performance, making it quite suitable for quantum key distribution, laser ranging, and optical time domain reflectometry. Furthermore,the SPD exhibited extremely low-noise characteristics. The detection efficiency of this SPD could reach 20% with the dark count rate of 2.5 × 10^(-6)∕gate and after-pulse probability of 4.1% at 1 GHz. | YAN LIANG QILAI FEI ZHIHE LIU KUN HUANG HEPING ZENG | 2019 | Photonics Research2019，7，3： | 3 |
| 8 | Environmentally stable Er-fiber mode-locked pulse generation and amplification by spectrally filtered and phase-biased nonlinear amplifying long-loop mirror显示文摘We report on environmentally stable long-cavity ultrashort erbium-doped fiber lasers,which self-start mode-locking at quite low thresholds by using spectrally filtered and phase-biased nonlinear amplifying long-loop mirrors.By employing 100-m polarization-maintaining fiber(PMF)in the nonlinear loop,the fundamental repetition rate reaches 1.84 MHz and no practical limitation is found to further decrease the repetition rate.The filter used in the long loop not only suppresses Kelly sidebands of the solitons,but also eliminates the amplified spontaneous emission which exists widely in lowrepetition-rate ultrafast fiber lasers.The bandwidth of the filter is optimized by using a numerical model.The laser emits approximately 3-ps pulses with an energy of 17.4 p J,which is further boosted to 1.5μJ by using a fiber amplifier. | Zhengru Guo Qiang Hao Junsong Peng Heping Zeng | 2019 | High Power Laser Science and Engineering2019，7，3： | 3 |
| 9 | Mid-infrared photon counting and resolving via efficient frequency upconversion显示文摘Optical detectors with single-photon sensitivity and large dynamic range would facilitate a variety of applications.Specifically,the capability of extending operation wavelengths into the mid-infrared region is highly attractive.Here we implement a mid-infrared frequency upconversion detector for counting and resolving photons at 3μm.Thanks to the spectrotemporal engineering of the involved optical fields,the mid-infrared photons could be spectrally translated into the visible band with a conversion efficiency of 80%.In combination with a silicon avalanche photodiode,we obtained unprecedented performance with a high overall detection efficiency of 37%and a low noise equivalent power of 1.8×10^(-17) W∕Hz1∕2.Furthermore,photon-number-resolving detection at mid-infrared wavelengths was demonstrated,for the first time to our knowledge,with a multipixel photon counter.The implemented upconversion detector exhibited a maximal resolving photon number up to 9 with a noise probability per pulse of 0.14%at the peak detection efficiency.The achieved photon counting and resolving performance might open up new possibilities in trace molecule spectroscopy,sensitive biochemical sensing,and free-space communications,among others. | KUN HUANG YINQI WANG JIANAN FANG WEIYAN KANG YING SUN YAN LIANG QIANG HAO MING YAN HEPING ZENG | 2021 | Photonics Research2021，9，2： | 2 |
| 10 | Effect of adjuvant therapy with electroacupuncture on bone turnover markers and interleukin 17 in patients with rheumatoid arthritis显示文摘OBJECTIVE: To evaluate the effect of electroacupuncture as an adjuvant treatment with first-line medications on bone metabolism biomarkers and interleukin-17(IL-17) in the peripheral blood of patients with rheumatoid arthritis(RA).METHODS: Sixty RA patients were randomized into three groups. The control group was treated with methotrexate plus leflunomide(MTX + LEF),the acupuncture group was treated with simple needling plus MTX + LEF, and the patients in the electroacupuncture(EA) group were treated with EA plus MTX + LEF. EA or acupuncture was applied every other day for a total of 10 times over a treatment period of 8 weeks.RESULTS: In all three treatment groups, serum levels of the bone metabolism markers PICP, N-MID,and B-ALP were elevated and the concentrations of the inflammatory markers β-CTx, IL-17, CRP, and TRACP-5b were reduced after treatment. These differences were significant for the EA group but not the other groups(P < 0.05).CONCLUSION: EA could effectively reduce the suffering and improve the quality of life of RA patients. It is a promising adjuvant therapy for enhancing the effectiveness of clinical therapeutics. | Zeng Chuang Bai Xuejing Qin Heping Wang Hong Rong Xiaofeng Yan Jin | 2019 | Journal of Traditional Chinese Medicine2019，39，4： | 2 |
| 11 | Quantum key distribution in 50-km optic fibers显示文摘In this paper, we report our recent experiment of long-distance fiber-optic plug and play quantum cryptography system wherein a Faraday-Mirror was used to compensate for the polarization mode dispersion and phase drifts. The pulse-biased coincident gate single-photon detection technique was used to effectively reduce the noises from the detrimental Rayleigh backscattering. We have achieved a quantum key distribution system with the working distance of 50 km, which was tested to be stable in more than 6 hours continuous work. And we also demonstrated the practical quantum communication in a local area network using the TCP protocol. | ZHOU Chunyuan WU Guang CHEN Xiuliang LI Hexiang ZENG Heping | 2004 | Science China(Physics,Mechanics & Astronomy)2004，47，2： | 2 |
| 12 | Double-clad fiber amplifier for broadband tunable ytterbium-doped oxyorthosilicates lasers显示文摘 | Hao Qiang Li Wenxue Zeng Heping | 2007 | Opt Express2007，15，16： | 1 |
| 13 | All-optical high-precision repetition rate locking of an Yb-doped fiber laser 显示文摘 | Yang Kangwen Hao Qiang Zeng Heping | 2015 | 1EEE Photonics Technology Letters2015，27，8： | 1 |
| 14 | 显示文摘 | Sun Zhenrong Tong Minghong Zeng Heping | 2001 | Chem Phys Lett2001，342，： | 1 |
| 15 | Quantum key distribution in 50-km optic fibers显示文摘 | Chunyuan Zhou Guang Wu Xiuliang Chen Hexiang Li Heping Zeng | 2004 | Science in China Series G: Physics and Astronomy2004，，2： | 1 |
| 16 | Molecular wakes for ultrashort laser pulses显示文摘The molecular wake-assisted interaction between two collinear femotosecond laser pulses is investigated in air,which leads to the generation of a controllable 1.8 mJ super-continuum pulse with an elongated self-guided channel due to the cross-phase modulation of the impulsively aligned diatomic molecules in air. For two parallel launched femtosecond laser pulses with a certain spatial separation,controllable attraction and repulsion of the pulses are observed due to the counter-balance among molecular wakes,Kerr and plasma effects,where the molecular wakes show a longer interaction distance than the others to control the propagation of the intense ultrashort laser pulses. | CAI Hua,WU Jian,LU PeiFen,TONG YuQi,YANG Xuan,BAI XueShi,LI Hao,PAN HaiFeng & ZENG HePing State Key Laboratory of Precision Spectroscopy,East China Normal University,Shanghai 200062,China | 2010 | Science China(Physics,Mechanics & Astronomy)2010，53，6： | 1 |
| 17 | Optical Limiting Response in a Unsymmetrical Dithiolene Metal Complex ( Me4 N)2 显示文摘 | Sun Zhenrong Tong Minghong Zeng Heping | 2001 | Chem Phys Lett2001，342，： | 1 |
| 18 | Gigantic Cavernous Hemangioma of the Liver Treated by Intra-Arterial Embolization with Pingyangmycin-Lipiodol Emulsion: A Multi-Center Study显示文摘 | Qingle Zeng Yanhao Li Yong Chen Yong Ouyang Xiang He Heping Zhang | 2004 | CardioVascular and Interventional Radiology2004，，5： | 1 |
| 19 | Pro-cessing characteristics and thermal stabilities of gel and sol ofepoxidized natural rubber显示文摘 | Yu Heping Zeng Zongqiang Lu Guang Wang Qifang | 2008 | European Polymer2008，44，1： | 1 |
| 20 | Double- clad fiber amplifier for broadband tunable ytterbium - doped oxyorthosilicates lasers显示文摘 | Qiang Hao Wenxue Li and Heping Zeng | 2007 | OPTICS EXPRESS2007，15，16： | 1 |
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