检索结果-南通市图书馆

Spatiotemporally mode-locked soliton fiber laser at 2.8µm

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

High Power Laser Science and Engineering 2023年第5期11卷 93-97页

作者： Ying’an Chen Yicheng Zhou Zhipeng Qin Guoqiang Xie Peng Yuan jingui ma Liejia Qian School of Physics and Astronomy Key Laboratory for Laser Plasmas(Ministry of Education)Collaborative Innovation Center of IFSA(CICIFSA)Shanghai Jiao Tong UniversityShanghaiChina

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.

关键词： mid-infrared soliton fiber laser spatiotemporal mode-locking

Numerical study of spatial chirp distortion in quasi-parametric chirped-pulse amplification

在线全文

学校读者我要写书评

暂无评论

High Power Laser Science and Engineering 2022年第3期10卷 19-24页

作者： Yirui Wang Jing Wang jingui ma Peng Yuan Liejia Qian School of Physics and Astronomy Shanghai Jiao Tong UniversityShanghai 200240China Tsung-Dao Lee Institute Shanghai Jiao Tong UniversityShanghai 200240China

Optical parametric chirped-pulse amplification is inevitably subject to high-order spatial chirp,particularly under the condition of saturated amplification and a Gaussian pump;this corresponds to an irreversible spatiotemporal distortion and consequently degrades the maximum attainable focused intensity.In this paper,we reveal that such spatial chirp distortion can be significantly mitigated in quasi-parametric chirped-pulse amplification(QPCPA)with idler absorption.Simulation results show that the quality of focused intensity in saturated QPCPA is nearly ideal,with a spatiotemporal Strehl ratio higher than 0.98.As the seed bandwidth increases,the idler absorption spectrum may not be uniform,but the Strehl ratio in QPCPA can be still high enough due to stronger idler absorption.

关键词： gain saturation quasi-parametric chirped-pulse amplification spatiotemporal distortions

Demonstration of 85%pump depletion and 10-6 noise content in quasi-parametric chirped-pulse amplification

在线全文

学校读者我要写书评

暂无评论

Light(Science & Applications) 2022年第10期11卷 2406-2414页

作者： jingui ma Kainan Xiong Peng Yuan Xiaoniu Tu Jing Wang Guoqiang Xie Yanqing Zheng Liejia Qian Key Laboratory for Laser Plasmas(MOE) Collaborative Innovation Center of IFSA(CICIFSA)School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China Shanghai Institute of Ceramics Chinese Academy of SciencesShanghai 201800China School of material Science and Chemical Engineering Ningbo UniversityNingboZhejiang 315211China Tsung-Dao Lee Institute Shanghai Jiao Tong UniversityShanghai 200240China

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.

关键词： pump pulse depletion

Ultrabroadband second-harmonic generation via spatiotemporal-coupled phase matching

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Optics Letters 2024年第1期22卷 105-112页

作者：陶昱东朱文涛章艳芳马金贵王静袁鹏张浩朱鹤元钱列加 Key Laboratory for Laser Plasma Shanghai Jiao Tong UniversityShanghai 200240China Key Laboratory of Micro and Nano Photonic Structures Fudan UniversityShanghai 200433China Tsung-Dao Lee Institute Shanghai Jiao Tong UniversityShanghai 200240China

We propose a spatially chirped quasi-phase-matching(QPM)scheme that enables ultrabroadband second-harmonic-generation(SHG)by using a fan-out QPM grating to frequency-convert a spatially chirped fundamental wave.A“zerodispersion”4f system maps the spectral contents of ultrabroadband fundamental onto different spatial coordinates in the Fourier plane,where the fundamental is quasi-monochromatic locally in picosecond duration,fundamentally canceling high-order phase mismatch.A fan-out QPM grating characterized by a linear variation of the poling period along the transverse direction exactly supports the QPM of the spatially chirped beam.We theoretically demonstrate the SHG of an 810-nm,12.1-fs pulse into a 405-nm,10.2-fs pulse with a conversion efficiency of 77%.

关键词： nonlinear optics second-harmonic generation few-cycle pulse

Parametric generation and phase locking of multiple sidebands in the regime of full-back-conversion

在线全文

学校读者我要写书评

暂无评论

High Power Laser Science and Engineering 2023年第2期11卷 44-51页

作者： Wenhao Wang Yudong Tao jingui ma Jing Wang Peng Yuan Dongfang Zhang Liejia Qian School of Physics and Astronomy Shanghai Jiao Tong UniversityShanghaiChina Tsung-Dao Lee Institute Shanghai Jiao Tong UniversityShanghaiChina

Parametric interaction allows both forward and backward energy transfers among the three interacting waves.The back-conversion effect is usually detrimental when unidirectional energy transfer is desired.In this theoretical work,we manifest that the back-conversion effect underpins the direct generation of the picosecond pulse train without the need for a laser resonator.The research scenario is an optical parametric amplification(OPA)that consists of a second-order nonlinear medium,a quasi-continuous pump laser and a sinusoidal amplitude-modulated seed signal.The back-conversion of OPA can transfer the modulation peaks(valleys)of the incident signal into output valleys(peaks),which inherently induces spectral sidebands.The generation of each sideband is naturally accompanied with a phase shift of±π.In the regime of full-back-conversion,the amount and amplitude of the sidebands reach the maximum simultaneously,and their phase constitutes an arithmetic sequence,leading to the production of a picosecond pulse train.The generated picosecond pulse train can have an ultrahigh repetition rate of 40 GHz or higher,which may facilitate ultrafast applications with ultrahigh speed.

关键词： picosecond pulse train quadratic parametric process sideband generation

2.8 μm all-fiber Q-switched and mode-locked lasers with black phosphorus

在线全文

学校读者我要写书评

暂无评论

Photonics Research 2018年第11期6卷 1074-1078页

作者： ZHIPENG QIN GUOQIANG XIE jingui ma PENG YUAN LIEJIA QIAN Key Laboratory for Laser Plasmas (Ministry of Education) Collaborative Innovation Center of IFSA (CICIFSA) School of Physics and AstronomyShanghai Jiao Tong University

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.

关键词： all-fiber Q-switched rare-earth-doped fluoride fiber lasers black phosphorus

Mode-locked 2.8-μm fluoride fiber laser:from soliton to breathing pulse

在线全文

学校读者我要写书评

暂无评论

Advanced Photonics 2019年第6期1卷 1-6页

作者： Zhipeng Qin Guoqiang Xie Hongan Gu Ting Hai Peng Yuan jingui ma Liejia Qian Shanghai Jiao Tong University School of Physics and AstronomyShanghaiChina Shanghai Jiao Tong University Collaborative Innovation Center of Inertial Fusion Sciences and ApplicationsShanghaiChina Shanghai Jiao Tong University Key Laboratory for Laser PlasmasMinistry of EducationShanghaiChina

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.

关键词： ultrafast fiber laser mid-infrared breathing pulse mode-locking dispersion management

Large temporal window and high-resolution single-shot cross-correlator with two separate measurement channels

在线全文

学校读者我要写书评

暂无评论

High Power Laser Science and Engineering 2022年第6期10卷 75-83页

作者： jingui ma Xiaoping Ouyang Liangze Pan Peng Yuan Dongfang Zhang Jing Wang Guoqiang Xie Jianqiang Zhu Liejia Qian Key Laboratory for Laser Plasmas(MOE) Collaborative Innovation Center of IFSASchool of Physics and AstronomyShanghai Jiao Tong UniversityShanghaiChina Joint Laboratory of High Power Laser and Physics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghaiChina Tsung-Dao Lee Institute Shanghai Jiao Tong UniversityShanghaiChina

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.

关键词： pulse contrast single-shot cross-correlator ultrashort ultraintense laser

Toward 5.2μm terawatt few-cycle pulses via optical parametric chirped-pulse amplification with oxide La3Ga5.5Nb0.5O14crystals

在线全文

学校读者我要写书评

暂无评论

High Power Laser Science and Engineering 2019年第4期7卷 21-32页

作者： Jinsheng Liu jingui ma Jing Wang Peng Yuan Guoqiang Xie Liejia Qian Key Laboratory for Laser Plasmas(Ministry of Education) Collaborative Innovation Centre of IFSA(CICIFSA)School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China Tsung-Dao Lee Institute Shanghai Jiao Tong UniversityShanghai 200240China

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.

关键词： few-cycle mid-infrared OPCPA oxide LGN crystals