A5100679215- Advanced Fiber Laser Technologies
- Laser-Matter Interactions and Applications
- Photonic Crystal and Fiber Optics
- Solid State Laser Technologies
- Advanced Fiber Optic Sensors
- 2D Materials and Applications
- Diamond and Carbon-based Materials Research
- Orbital Angular Momentum in Optics
- Nonlinear Optical Materials Studies
- Photonic and Optical Devices
- MXene and MAX Phase Materials
- Laser Design and Applications
- Optical Coherence Tomography Applications
- Photorefractive and Nonlinear Optics
- Luminescence and Fluorescent Materials
- Spectroscopy and Laser Applications
- Crystal Structures and Properties
- Advanced Fluorescence Microscopy Techniques
- Neural Networks and Reservoir Computing
- Nonlinear Optical Materials Research
- Laser-Ablation Synthesis of Nanoparticles
- Laser-Plasma Interactions and Diagnostics
Shandong University
2021-2025
Universität Hamburg
2016-2024
Center for Free-Electron Laser Science
2016-2023
Deutsches Elektronen-Synchrotron DESY
2016-2023
Ministry of Education of the People's Republic of China
2021-2022
Shandong Normal University
2022
Massachusetts Institute of Technology
2018-2019
Peking University
2014-2019
We reported on a nanosecond regenerative amplified laser with repetition rate of 1 kHz by employing diodes (LDs) distinct wavelengths as both the seed and pump source utilizing Nd:YAG gain medium. The single-pulse energy was 1.58 mJ pulse duration adjustable, ranging from to 5 ns. Combining two oppositely oriented BBO crystals for second harmonic generation (SHG) an LBO crystal third (THG), 355 nm 257 μJ attained, corresponding THG efficiency 16.2%.
We report on a compact passive mode-locked Er:fiber ring laser operated at the fundamental repetition rate of 517 MHz, which we believe is highest ever reported in cavity fiber laser. The key technique employment two innovative high-power wavelength domain multiplexer collimators with all gain suited for high power (up to 2 W) pumping. featured direct chirp-free output pulse, 97 fs without extracavity compression an average 90 mW.
We report a core-pumped all-normal dispersion mode-locked Nd-doped fiber laser at 910 and 935 nm. The pulse is compressed to 198 fs, the energy 1.3 nJ. slope efficiency more than 14%. This tested as optical source for two-photon fluorescence imaging of pollen.
In this paper, two-dimensional material Sb 2 Te 3 nanosheets are fabricated and the optical nonlinear response is investigated. A laser diode (LD) end-pumped doubly Q-switched Tm:YAP with electro-optic modulator (EOM) based saturable absorber (SA) presented. The shortest pulse duration of 38 ns achieved at repetition frequency 100 Hz, corresponding to highest peak power 111.8 kW. double Q-switching technique shows advantages compression improvement. coupled rate equations for developed...
Abstract We propose a high-power, noise-like pulse (NLP), Tm-doped fiber oscillator applying the nonlinear polarization rotation method. The repetition rate is 12.94 MHz resulting in energy of 75.7 nJ. emitted mode-locking spectrum can be tuned from 1885 nm to 1949 64 spectral range. A theoretical model built illustrate NLP dynamics and its boundary conditions with soliton inside 2 μ m ring cavity. corresponding simulation results match well our experimental results.
We incorporate two techniques into pre-chirp managed amplification (PCMA) to achieve high-energy ultrashort pulses with the duration well below 100 fs. Numerical simulations confirmed by our experimental results demonstrate that seeding PCMA circularly polarized instead of linearly can increase amplified pulse energy 1.5 times. also employ high-dispersion chirped mirrors compress throughput efficiency as high 98%. These allow us an Yb-fiber system emits 50-MHz, 47-fs 101.2-W average power.
We proposed a passively stabilized Q-switched <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:mi mathvariant="normal">E</mml:mi> mathvariant="normal">r</mml:mi> </mml:mrow> <mml:mo>:</mml:mo> <mml:msub> mathvariant="normal">L</mml:mi> mathvariant="normal">u</mml:mi> <mml:mn>2</mml:mn> </mml:msub> mathvariant="normal">O</mml:mi> <mml:mn>3</mml:mn> </mml:math> laser at 2845 nm, applying MXene mathvariant="normal">N</mml:mi>...
In the current study, layered metallic vanadium disulfide (VS2) is fabricated by a liquid-phase exfoliation method, and its microstructures as well optical characteristics are investigated. Based on first-principles calculations, band structure density of states both bulk T-VS2 monolayer H-VS2 illustrated, showing behavior with zero gap. By using VS2 saturable absorber in doubly Q-switched Tm:YAP laser an EOM, Q-switching pulses at 2 μm 22 ns 200 Hz generated, corresponding to single pulse...
An ytterbium-doped stretched-pulse mode-locked fiber oscillator was fabricated by applying a nonlinear amplifier loop mirror (NALM). The cavity built using large-mode area (LMA) polarization-maintaining (PM) double-cladding (DC) fiber. central wavelength of the generated 24.7 MHz laser can be modified from 1034 to 1104 nm tuning intra-cavity loss. output power this with at transmission and reflection ports is 7.61 0.33 mW, respectively. corresponding compressed pulse durations are 192 187...
We report femtosecond pulse generation in an amplifier similariton oscillator and a prechirped fiber system. The final output power is 1.4 W, the fundamental repetition rate 19.1 MHz after single state amplifier. pulsewidth 109 fs.
In this paper, the Nb2CTxMXene nanosheets were fabricated and corresponding microstructures investigated. The nonlinear optical response was illustrated by open aperture Z-scan I-scan methods. ground excited state absorption cross-sections of 2D also As saturable absorber (SA), applied in passively Q-switched Tm:YAP laser. 1.96μs pulses with 3.97 W peak power achieved at repetition frequency 80 kHz. Further theoretical model built using coupled rate equations simulating dynamic process...
In this paper, a laser diode (LD) pumped passive mode-locking Tm,Ho:GAGG based on semiconductor saturable absorber mirror (SESAM) is reported. By adjusting the group delay dispersions inside cavity and transmissions of output couplers (OCs), shortest pulse duration 10.84 ps at 2089.9 nm achieved, average power 33.17 mW runs 83.01 MHz repetition rate. A maximum 66.43 also obtained with 16.56 by using an OC 3%. To best our knowledge, first report laser.
We report record output pulse energies from a cryogenic 8-pass Yb:YLF amplifier system operating at 10 Hz repetition rate. When seeded with 20-mJ, 1-ns stretched pulses, the produced pulses 305 mJ of energy 1018.5 nm spectral width supporting sub-ps pulse-duration. The beam profile was quite symmetric and had measured quality factor (M 2 ) ∼1.45. To achieve this performance, diameter inside gain element is gradually increased via an adjustable telescope around 4.6 mm to 6.2 mm. This enables...
We firstly propose a roadmap for thedesign of high repetition rate (∼100 MHz) Tm-doped ultrafast fiber laser with an emission wavelength above 2000 nm. This is confirmed by both theoretical simulation and experimental verification. The designed oscillator not only operates in continuous wave regime broad tunable range ∼100 nm, but also mode-locking >2000 nm (up to 2020 nm). A 470-fs pulse ∼96 MHz the maximum average power 50 mW are achieved at output 2007 matching well prediction. In further...
Metal-organic frameworks (MOFs) materials with sufficient charge mobility and promising structural flexibility are appealing for compact optoelectronic nano devices. In this work, the nonlinear optical features of MOFs-CuBTC were comprehensively investigated first time. The CuBTC saturable absorbers synthesized via liquid-phase exfoliation (LPE) method characterized morphology structure. response was by employing an open-aperture Z-scan technique, which showed great modulation potential...
We report the surface morphology and nonlinear absorption characteristics of MXene VCrC nanosheets prepared by liquid-phase exfoliation method. The self-made was applied as a saturable absorber in Tm:YAP laser experiments, performing excellent Q-switching optical modulation infrared range. With this absorber, stable passively Q-switched 2 μm achieved. Under an incident pump power 3.52 W, maximum output 280 mW obtained with T = 3% coupler at repetition frequency 49 kHz. corresponding pulse...
We demonstrate a femtosecond Yb:fiber laser amplification system which delivers 97 W average output power at repetition rate of 1.08 GHz using rod-type photonic crystal fiber. The re-compressed pulse is 233 fs. Numerical simulation was also conducted in agreement with our experimental results.
High-power, single-frequency lasers are important in the applications of coherent optical communication, Doppler wind lidar, and remote sensing. Here, a 10-kHz, 353-μJ, single-frequency, 574-ns, 1548-nm fiber laser system was demonstrated based on pulse modulation. The 1548-nm, seed with linewidth 1.25 kHz modulated by two acousto-optic modulators (AOMs) into 10-kHz pulsed laser. Two cascaded amplifiers were spliced after AOMs to scale up energy. amplified spontaneous emission (ASE)...