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oe1(光电查) - 科学论文

34 条数据
?? 中文（中国） ▾

  • Pulse-diode-intermittent-pumped 2-μm acousto-optically Q-switched Tm:YAG laser

    摘要： An innovative pulse-diode-intermittent-pumped 2-micron acousto-optically Q-switched Tm:YAG laser is presented for the first time, which can improve the output energy, while ensuring the operation repetition of laser. Maximum output energy of 6.83 mJ and minimum pulse width of 367.7 ns at Q-switched repetition rate of 200 Hz is obtained at pump energy of 86.2 mJ. The output wavelength is 2014.9 nm. The beam quality factor Mx2 is 1.59. The stability is larger than 98%.

    关键词： Q-switch,Diode-pumped lasers,Tm:YAG

    更新于2025-11-28 14:24:03

  • Direct oscillation at 640-nm in single longitudinal mode with a diode-pumped Pr:YLF solid-state laser

    摘要： A diode-pumped solid-state laser directly emitting continuous-wave (cw), single-longitudinal mode (SLM) output at 640-nm with a c-cut praseodymium-doped yttrium lithium fluoride (Pr:YLF) crystal was demonstrated for the first time, to the best of our knowledge. Combining two quarter-wave plates (QWPs) and one Brewster plate to form a twisted-mode cavity, this SLM solid-state laser achieved a maximum cw output power of 403 mW with a threshold of 600 mW and a slope efficiency of 26.8%. The emission spectrum had a linewidth of 150 MHz. The single-mode beam quality (M2) was 1.10 and 1.07 along the x and y direction, respectively.

    关键词： Single-longitudinal-mode,Diode-pumped solid-state lasers,Visible lasers

    更新于2025-11-28 14:23:57

  • Tungsten disulfide saturable absorber for passively Q-Switched YVO4/Nd:YVO4/YVO4 laser at 1342.2 nm

    摘要： By using both tungsten disul?de saturable absorber (WS2-SA) and YVO4/Nd:YVO4(0.3 at.%)/YVO4 crystal, a passively Q-switched laser centered at 1342.2 nm is ?rst reported. Stable Q-switched pulses can be obtained. At the pump power of 12 W, a shortest pulse width of 550 ns and a pulse repetition rate of 97 kHz can be observed by a digital oscilloscope, corresponding to maximum pulse energy of 5.55 μJ and pulse peak power of 10.1 W. The results promote the promising applications of WS2-SA in all-solid-state laser at 1.3 μm.

    关键词： WS2 saturable absorber,Diode-pumped lasers,Q-switched lasers,1342.2 nm laser

    更新于2025-11-28 14:23:57

  • Dual-wavelength passively mode-locked Yb-doped fiber laser based on a $\text{SnSe}_2$-PVA saturable absorber

    摘要： In this paper, tin diselenide (SnSe2) was successfully prepared with liquid phase exfoliation method and embedded into polyvinyl alcohol (PVA) as a saturable absorber (SA) in a dual-wavelength passively mode-locked Yb-doped fiber laser. Stable mode-locked pulses with a maximum average output power of 2.55 mW and a slope efficiency of 1.3% at the fundamental repetition rate of 333 kHz were achieved. By properly adjusting polarization state, four kinds of dual-wavelength fundamental frequency mode-locked pulses with peak wavelength intervals of 0.4, 1.0, 1.5 and 1.9 nm were obtained, and corresponding waveforms with different single pulse shapes were investigated in our work. A maximum signal to noise ratio (SNR) of 71.04 dB indicates that SnSe2 is promising to serve as SA in passively mode-locked fiber lasers.

    关键词： Fiber lasers,Mode-locked lasers,Diode-pumped lasers

    更新于2025-11-28 14:23:57

  • High-Power Continuous-Wave and Acousto-Optical Q-Switched Ho:(Sc <sub/>0.5</sub> Y <sub/>0.5</sub> ) <sub/>2</sub> SiO <sub/>5</sub> Laser Pumped by Laser Diode

    摘要： We experimentally investigate the continuous-wave (cw) and acousto-optical (AO) Q-switched performance of a diode-pumped Ho:(Sc0.5Y0.5)2SiO5 (Ho:SYSO) laser. A fiber-coupled laser diode at 1.91 ??m is employed as the pump source. The cw Ho:SYSO laser produces 13.0 W output power at 2097.9 nm and 56.0% slope efficiency with respect to the absorbed pump power. In the AO Q-switched regime, at a pulse repetition frequency of 5 kHz, the Ho:SYSO laser yields 2.1 mJ pulse energy and 21 ns pulse width, resulting in a calculated peak power of 100 kW. In addition, at the maximum output level, the beam quality factor of the Q-switched Ho:SYSO laser is measured to be about 1.6.

    关键词： Laser Diode Pumped,Continuous-Wave,Acousto-Optical Q-Switched,High-Power,Ho:(Sc0.5Y0.5)2SiO5 Laser

    更新于2025-11-28 14:23:57

  • Efficient Continuous-Wave Diode-Pumped Ho :GTO Laser with a Pump Recycling Scheme

    摘要： We demonstrate a novel continuous-wave 2.1 μm Ho : GTO laser pumped by a laser diode. Employing a pump recycling scheme and 30% output transmittance, we obtain an output power of 4.76 W and a single oscillating peak of 2068.4 nm with a slope e?ciency of 55.3% with respect to the absorbed pump power. In addition, the M2 factor of the Ho : GTO laser is reckoned to be approximately 1.3 at the maximum output power.

    关键词： infrared laser,diode-pumped laser,Ho : GTO

    更新于2025-09-23 15:19:57

  • Spectroscopy and diode-pumped continuous-wave laser operation of Tm:Y2O3 transparent ceramic at cryogenic temperatures

    摘要： We present the spectroscopic and laser characteristics of a 3 at.% Tm:Y2O3 transparent ceramic at cryogenic temperatures. An absorption cross section of 4.7 × 10?21 cm2 with a bandwidth of 0.7 nm centered at 793.3 nm and an emission cross section of 29.0 × 10?21 cm2 centered at 1930.9 nm were estimated at 80 K. Continuous-wave laser operation was achieved using broadband and VBG stabilized laser diodes emitting around 793 nm as pump sources. With the VBG pump diode, a maximum output power of 6.4 W was achieved at 80 K corresponding to a slope efficiency of 52.0% with respect to absorbed power.

    关键词： cryogenic temperatures,diode-pumped,Tm:Y2O3,spectroscopy,continuous-wave laser,transparent ceramic

    更新于2025-09-19 17:13:59

  • Modeling of the 3D spatio-temporal thermal profile of joule-class -based laser amplifiers

    摘要： Thermal pro?le modi?cation of an active material in a laser ampli?er via optical pumping results in a change in the material’s refractive index, and causes thermal expansion and stress, eventually leading to spatial phase aberrations, or even permanent material damage. For this purpose, knowledge of the 3D spatio-temporal thermal pro?le, which can currently only be retrieved via numerical simulations, is critical for joule-class laser ampli?ers to reveal potentially dangerous thermal features within the pumped active materials. In this investigation, a detailed, spatio-temporal numerical simulation was constructed and tested for accuracy against surface thermal measurements of various end-pumped Yb3+-doped laser-active materials. The measurements and simulations show an excellent agreement and the model was successfully applied to a joule-class Yb3+-based ampli?er currently operating in the POLARIS laser system at the Friedrich-Schiller-University and Helmholtz-Institute Jena in Germany.

    关键词： diode-pumped solid-state lasers,ytterbium,laser ampli?ers,spatio-temporal thermal pro?le modeling,high intensity lasers

    更新于2025-09-19 17:13:59

  • Stable pulse output of a diode-pumped Tm:YAP laser based on the longitudinal mode beating effect

    摘要： We successfully demonstrate the stable pulse output of a diode-end-pumped Tm:YAP laser based on the longitudinal mode beating technique. Without any additional modulation elements in the cavity, the stable pulse output of a Tm:YAP laser at 1937 nm is achieved. At an absorbed pump power of 6 W, the average output power of 1.14 W is obtained with a slope efficiency of 23%, and the pulse duration is 5.3 ns with a pulse repetition frequency of 89 MHz. To the best of our knowledge, this is the first 2 μm self-pulsing solid-state laser based on the longitudinal mode beating effect.

    关键词： self-pulsing laser,diode pumped lasers,all-solid-state laser,Tm:YAP

    更新于2025-09-19 17:13:59

  • [IEEE 2019 Photonics North (PN) - Quebec City, QC, Canada (2019.5.21-2019.5.23)] 2019 Photonics North (PN) - Dual-wavelength Yb:YAP laser

    摘要： Dual-wavelength operation of Yb:YAP laser with an intracavity birefringent filter (BRF) was demonstrated. By using a 1 mm-thick BRF, DW pairs with wavelength separation ranging from 1.8 nm up to 11.3 nm could be generated based on gain balancing provided by a single transmission peak of the filter. In this way, the wavelength separation was not limited by the available free spectral range of the filter.

    关键词： Diode-pumped lasers,Birefringence,ytterbium lasers

    更新于2025-09-16 10:30:52