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Monolithic 0–f Scheme-Based Frequency Comb Directly Driven by a High-Power Ti:Sapphire Oscillator

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Chinese Physics Letters 2020年第5期37卷 47-50页

作者： Jian-Wang jiang Shao-Bo Fang Zi-Yue Zhang jiang-feng zhu Hai-Nian Han Guo-Qing Chang Zhi-Yi Wei School of Physics and Optoelectronic Engineering Xidian UniversityXi'an 710071 Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190 University of Chinese Academy of Sciences Beijing 100049 Songshan Lake Material Laboratory Dongguan 523808

A monolithic O-f scheme-based femtosecond optical frequency comb directly driven by a high-power Ti:sapphire laser oscillator is *** spectrum covering from 650 nm to 950 nm is generated from the Ti:sapphire oscillator with a repetition rate of 170 *** average output power up to 630 mW is delivered under the pump power of 4.5 W.A 44-dB signal-to-noise ratio(SNR)of the carrier-envelope phase offset(CEO)beat note is achieved under the resolution of 100 kHz and is long-term stabilized to a reference source at 20 *** integrated phase noise(IPN)in the range from 1 Hz to 1 MHz is calculated to be 138 mrad,corresponding to the timing jitter of 63 as at the central wavelength of 790 nm.

关键词： pump oscillator noise

An Yb-fiber frequency comb phase-locked to microwave standard and optical reference

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Chinese Physics B 2020年第3期29卷 142-147页

作者： Hui-Bo Wang Hai-Nian Han Zi-Yue Zhang Xiao-Dong Shao jiang-feng zhu Zhi-Yi Wei School of Physics and Optoelectronic Engineering Xidian UniversityXi’an 710071China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100190China

We present a fully stabilized Yb-fiber frequency comb locked to a microwave standard and an optical reference separately. The carrier-envelope offset frequency is generated by a standard f–2f interferometer with 40 dB signal-tonoise ratio. The offset frequency and the repetition rate are stabilized simultaneously to the radio frequency reference for more than 30 hours, and the fractional Allan deviation of the comb is the same as the microwave standard of 10^(-12) at 1 ***, the comb is locked to an ultra-stable optical reference at 972 nm using an intracavity electro-optic modulator,exhibiting a residual integrated phase noise of 458 mrad(1 Hz–10 MHz) and an in-loop tracking stability of 1.77× 10^(-18) at 1 s, which is significantly raised by six orders comparing to the case locked to the microwave frequency standard.

关键词： Yb-fiber frequency comb low-noise optical reference

Attosecond pulse trains driven by IR pulses spectrally broadened via supercontinuum generation in solid thin plates

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Chinese Physics B 2020年第1期29卷 89-94页

作者： Yu-Jiao jiang Yue-Ying Liang Yi-Tan Gao Kun Zhao Si-Yuan Xu Ji Wang Xin-Kui He Hao Teng jiang-feng zhu Yun-Lin Chen Zhi-Yi Wei School of Physics and Optoelectronic Engineering Xidian UniversityXi'an 710071China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Institute of Applied Micro-Nano Materials School of ScienceBeijing Jiaotong UniversityBeijing 100044China Songshan Lake Material Laboratory Dongguan 523808China

We utilized a set of fused silica thin plates to broaden the spectrum of 1kHz,30 fs Ti:sapphire amplified laser pulses to an *** the compression by chirped mirror pairs,the generated few-cycle pulses were focused onto an argon filled gas *** detected high order harmonics corresponding to a train of 209 as pulses,characterized by the reconstruction of attosecond beating by interference of two-photon transition(RABITT)*** with the conventional attosecond pulse trains,the broad harmonics in such pulse trains cover more energy range,so it is more efficient in studying some typical cases,such as resonances,with frequency resolved *** the solid thin plates can support high power supercontinuum generation,it is feasible to tailor the spectrum to have different central wavelength and spectral width,which will make the RABITT source work in different applications.

关键词： supercontinuum generation high order harmonic generation reconstruction of attosecond beating by interference of two-photon transition(RABITT) attosecond pulse trains

7.6-W diode-pumped femtosecond Yb:KGW laser

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Chinese Physics B 2019年第4期28卷 207-210页

作者： Yan-Fang Cao Xiang-Hao Meng Jun-Li Wang Zhao-Hua Wang Meng-Yao Cheng jiang-feng zhu Zhi-Yi Wei School of Physics and Optoelectronic Engineering Xidian University Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences University of Chinese Academy of Sciences Songshan Lake Materials Laboratory

We have demonstrated a high power diode-pumped mode-locked femtosecond Yb:KGW laser with semiconductor saturable absorber mirror(SESAM). By using an output coupler with 10% transmittance, the laser delivered 160-fs pulses with average output power of 7.6 W at a repetition rate of 78 MHz, corresponding to pulse energy of 97 nJ and peak power of 606 kW.

关键词： femtosecond diode-pump SESAM mode-locking

High power diode-pumped passively mode-locked Nd:YVO_4 laser at repetition rate of 3.2 GHz

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Chinese Physics B 2019年第5期28卷 122-125页

作者： Meng-Yao Cheng Zhao-Hua Wang Yan-Fang Cao Xiang-Hao Meng jiang-feng zhu Jun-Li Wang Zhi-Yi Wei School of Physics and Optoelectronic Engineering Xidian University Beijing National Laboratory for Condensed Matter Physics and Institute of Physics Chinese Academy of Sciences University of Chinese Academy of Sciences Songshan Lake Materials Laboratory

A compact high power diode-pumped passively mode-locked Nd:YVO_4 laser with high repetition rate is *** an Nd:YVO_4 crystal and a semiconductor saturable absorber mirror(SESAM) in the oscillator, the picosecond pulse output with an average power of 1.38 W, a repetition rate of 3.24 GHz, and a pulse duration of 11.4 ps is achieved. After one stage of amplification, the final output power reaches 11.34 W, corresponding to a total optical-to-optical efficiency of about 32%. The root mean square(RMS) value of power fluctuation is demonstrated to be less than 0.6% in 24 hours,showing a superior stability with the compact configuration.

关键词： all-solid-state laser high repetition rate Nd:YVO4 laser mode-locked laser

Effect of fixing distal radius fracture with volar locking palmar plates while preserving pronator quadratus

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Chinese Medical Journal 2014年第16期127卷 2929-2933页

作者： Fan Jian Chen Kai zhu Hui jiang Bo Yuan feng zhu Xiaozhong Mei Jiong Yu Guangrong Department of Orthopedics Tongji Hospital Tongji UniversityShanghai 200065 China

Background L-shaped incision of pronator quadratus （PQ） muscle along its radial and distal borders was always taken for distal radius fractures reduction and internal *** of the PQ muscle was always recommended at the end of operation for some instructive *** repair of PQ is not satisfied because of poor quality of muscle and fascial tissues which may cause pain or impede forearm pronation and supination for post-operative scarring around *** the locking palmar plate to pass under the pronator quadratus muscle and the locking screws are inserted through miniincisions in pronator quadratus in some patients with distal radius fractures is a reasonable technique which can preserve the pronator *** purpose of this study was to evaluate and compare the clinical effects after volar plating of the distal radius fractures while preserving the pronator quadratus and pronator quadratus *** Between September 2010 and April 2012,65 patients （42 males and 23 females; aged 20-68 years and a mean age of 42.5 years） with distal radius fracture underwent open reduction and internal fixation using the volar locking palmar plates （Depuy or Smith companies）.The patients were classified as 23A-2 through 23C-3 according to the Orthopaedic Trauma Association （OTA） *** surgeries were completed by the same trained *** volar locking palmar plates of distal radius performed with preserving pronator quadratus group involved 30 patients including 19 males and 11 females and performed with pronator quadratus repair group involved 35 patients including 23 males and 12 *** compared the two groups for wrist pain,forearm range of motion,grip strength,pedoperative complications and wrist functional recovery *** The minimum follow-up for the whole cohort was one *** differences between the two groups were significant with regard to wrist pain,forearm range of motion,grip strength and wrist function at 1,2,and

关键词： distal radius fracture open reduction palmar plate pronator quadratus

Impacts of the annual cycle of background SST in the tropical Pacific on the phase and amplitude of ENSO

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Atmospheric and Oceanic Science Letters 2025年第1期18卷 12-17页

作者： Song jiang Congwen zhu Ning jiang State Key Laboratory of Severe Weather(LASW) Chinese Academy of Meteorological SciencesBeijingChina College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijingChina

The dominant annual cycle of sea surface temperature(SST)in the tropical Pacific exhibits an antisymmetric mode,which explains 83.4%total variance,and serves as a background of El Niño-Southern Oscillation(ENSO).However,there is no consensus yet on its anomalous impacts on the phase and amplitude of *** on data during 1982-2022,results show that anomalies of the antisymmetric mode can affect the evolution of ENSO on the interannual scale via Bjerknes feedback,in which the positive(negative)phase of the antisymmetric mode can strengthen El Niño(La Niña)in boreal winter via an earlier(delayed)seasonal cycle transition and larger(smaller)annual *** magnitude of the SST anomalies in the equatorial eastern Pacific can reach more than±0.3◦C,regulated by the changes in the antisymmetric mode based on random sensitivity *** reveal the spatial pattern of the annual cycle associated with the seasonal phase-locking of ENSO evolution and provide new insight into the impact of the annual cycle of background SST on ENSO,which possibly carries important implications for forecasting ENSO.

关键词： Annual cycle SST anomaly Antisymmetric mode ENSO

Generation of Femtosecond Laser Pulse at 1.43 GHz from an Optical Parametric Oscillator Based on LBO Crystal

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Chinese Physics Letters 2019年第12期36卷 43-46页

作者： Jia-Jun Song Xiang-Hao Meng Zhao-Hua Wang Xian-Zhi Wang Wen-Long Tian jiang-feng zhu Shao-Bo Fang Hao Teng Zhi-Yi Wei Bejjing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190 University of Chinese Academy of Sciences Beijing 100049 Songshan Lake Materials Laboratory Dongguan 523808 School of Physics and Optoelectronic Engineering Xiandian UniversityXi'an 710071

A femtosecond LBO optical parametric oscillator(OPO)with widely adjustable repetition rate by fractionally decrement of the cavity length is *** repetition rate of 755 MHz to 1.43 GHz at an interval of 75.5 MHz is realized,which is 10 to 19 times that of the pump *** properties of output signal at 750 nm at different repetition rates are *** power of signal decreases with increasing the repetition *** maximum power of 194 mW at the repetition rate of 755 MHz and the minimum power of 22 mW at repetition rate of 1.43 GHz for the signal at 750 nm are obtained for the pump power of 3 W.

关键词： pump Femto repetition

Observation of acoustic hybrid topological phases induced by the p-d orbital interactions

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 132-139页

作者： Xiao Xiang feng Gao Yu-Gui Peng Peng Wu Zong-Lin Li Xue-feng zhu School of Physics and Innovation Institute Huazhong University of Science and Technology

In spinless systems,growing attention has recently been attracted to synthetic gauge fields,which redefine the fundamental crystal symmetries by utilizing the projective algebraic ***,synthetic gauge fields have been commonly investigated in single orbital systems,and explorations on hybrid orbitals remain elusive in ***,we report the experimental observation of hybrid topological phases induced by hybrid synthetic gauge flux,which is formed by the interaction between p and d orbitals embedded in acoustic *** breaking the translation symmetries of Lxand/or Ly,we unambiguously demonstrate the first-order M?bius edge states and higher-order corner *** work establishes a platform for seeking exotic topological phases induced by hybrid-orbitals interactions and initializing the framework of hybrid-orbitalsrelated topological *** applications can be anticipated in scenarios such as high-quality sensing and robust wave trapping due to the stepwise energy distribution of the hybrid topological phase.

关键词： topological insulator synthetic gauge field projective symmetry corner states