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oe1(光电查) - 科学论文

10 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

  • 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

  • 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

  • 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

  • Frequency expansion of efficient passively Q-switched orthogonally-polarized dual-wavelength laser

    摘要： We report on the frequency expansion of e?cient passively Q-switched (PQS) orthogonally-polarized dual-wavelength laser for the ?rst time, to our knowledge. The dynamic of pulse synchronization for the PQS dual-wavelength laser was analyzed theoretically. With two Nd:YLF crystals, the simultaneous PQS orthogonally-polarized dual-wavelength laser at 1047 and 1053 nm was obtained with the maximum output powers of 4.5 and 4.2 W, respectively, resulting in a total optical-to-optical conversion e?ciency of 18.7%. The timing jitter between the 1047 nm main pulse and 1053 nm main pulse was 26.6 ns. Furthermore, substituting one of the Nd:YLF crystals for a Nd:YAG crystal, two sets of simultaneous orthogonally-polarized dual-wavelength lasers at 1047, 1064 nm and 1053, 1064 nm were generated with near 6 W of output power.

    关键词： Passively Q-switched,Dual-wavelength laser,Diode-pumped lasers

    更新于2025-09-16 10:30:52

  • 2?kHz single-frequency, injection-seeded Q-switched laser with a ‘double-reflection’ architecture

    摘要： A high-repetition-rate single-frequency injection-seeded Q-switched Er:YAG laser with a ‘double reflection’ architecture is reported. Single-frequency laser pulses at a pulse repetition frequency (PRF) of 2 kHz are obtained by using ‘ramp-fire’ injection-seeding technique. The half-width of the pulse spectrum is measured to be 2.05 MHz by using the heterodyne beating technique. The novel ‘double-reflection’ architecture is employed in order to achieve a stable high-repetition-rate single-frequency operation. As far as we know, 2 kHz is the highest PRF achieved from a single-frequency, injection-seeded Q-switched Er:YAG laser that can be used in a wind Lidar system.

    关键词： single-frequency lasers,eye-safe lasers,solid-state lasers,Q-switching,diode-pumped lasers,injection-seeding,Er:YAG lasers

    更新于2025-09-12 10:27:22

  • Efficient continuous-wave Nd:YLF laser in-band diode-pumped at 908?nm and its thermal lensing

    摘要： We report on what we believe is the first continuous-wave yttrium lithium fluoride laser with in-band diode pumping at 908 nm. Pumping at this wavelength reduced the quantum defect by more than 50% when compared to the conventional pumping at ~800 nm. The laser produced an output power of 850 mW at 1047 nm and its radiation was π-polarized. It had a near diffraction limited output beam and a maximum slope efficiency of ~73.9% with respect to the absorbed pump power. The thermal lensing strength was experimentally measured and compared with the previous experimental data. It was found that the thermal lensing was significantly reduced when compared to the traditional ~800 nm pumping.

    关键词： neodymium,diode-pumped lasers,solid-state laser

    更新于2025-09-12 10:27:22

  • Low-cost multimode diode-pumped Tm:YAG and Tm:LuAG lasers

    摘要： We report a continuous-wave operation of Tm:YAG and Tm:LuAG lasers pumped with a low-cost, multimode AlGaAs laser diode. First, the lifetime and the absorbance behavior of 5 mm, 6% Tm 3+ -doped YAG and LuAG crystals were thoroughly investigated. A low-cost multimode 3W laser diode at 781 nm was then used as a pump source for the Tm 3+ -doped laser systems. Using three different output couplers, up to 636 mW of output power was obtained from Tm:YAG laser, with a slope efficiency of 29% at 2017 nm. The maximum output power was 637 mW in the Tm:LuAG laser, with a slope efficiency of 28% at 2023 nm. The lasing performances showed a decreasing slope efficiency with an increasing level of output coupling, which leads to a high upconversion. Furthermore, using a birefringent filter in the resonators, the laser outputs were tuned from 1942 to 2086 nm in the Tm:YAG resonator and from 1931 to 2107 nm in the Tm:LuAG case.

    关键词： diode-pumped lasers,infrared lasers,Tm:LuAG laser,Tm:YAG laser,tunable lasers,solid-state lasers,Lasers

    更新于2025-09-11 14:15:04

  • Optimization and Characterization of High-Harmonic Generation for Probing Solid Density Plasmas

    摘要： The creation of high energy density plasma states produced during laser–solid interaction on a sub-picosecond timescale opens a way to create astrophysical plasmas in the lab to investigate their properties, such as the frequency-dependent refractive index. Available probes to measure absorption and phase-changes given by the complex refractive index of the plasma state are extreme-UV (EUV) and soft X-ray (XUV) ultra-short pulses from high harmonic generation (HHG). For demanding imaging applications such as single-shot measurements of solid density plasmas, the HHG probe has to be optimized in photon number and characterized in intensity and wavefront stability from shot-to-shot. In an experiment, a coherent EUV source based on HHG driven by a compact diode-pumped laser is optimized in photons per pulse for argon and xenon, and the shot-to-shot intensity stability and wavefront changes are characterized. The experimental results are compared to an analytical model estimating the HHG yield, showing good agreement. The obtained values are compared to available data for solid density plasmas to con?rm the feasibility of HHG as a probe.

    关键词： pump-probe,XUV,diode-pumped lasers,high energy density physics,high-harmonic generation

    更新于2025-09-04 15:30:14