High Power Laser Science and Engineering, Volume. 7, Issue 1, 01000e11(2019)
High efficiency second harmonic generation of nanojoule-level femtosecond pulses in the visible based on BiBO
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![Experimental setup in SHG experiment. $\unicode[STIX]{x1D706}/2,\unicode[STIX]{x1D706}/4$: waveplates; EC: pump energy control; FL: focusing lens; C: nonlinear crystal; CL: collimating lens; DM: dichroic mirror; FM: flip mirror; SM: spectrometer; CAM: camera; PM: power meter; SA: spectrum analyzer; PC: computer.](/Images/icon/loading.gif){kind=icon}
Fig. 1. Experimental setup in SHG experiment.
Fig. 2. Comparison between pump and SHG spatial profile, respectively.
Fig. 3. Autocorrelation measurement of the pulse at 1030, 1054, 1000 and 980 nm for top left, top right, bottom left and bottom right, respectively.
Fig. 4. Input (red) and depleted (orange) signal spectra for 1030, 1054, 1000 and 980 nm pulses.
Fig. 6. SHG efficiency versus input energy and average power for different wavelengths.
Fig. 7. Comparison (measured and simulated data) of the SHG efficiency as a function of the input intensity for different wavelengths.
Fig. 8. Experimental and simulated second harmonic generation spectrum of 1030 nm pumping beam.
Fig. 9. SHG efficiency versus focal spot diameter at two different energies: 3.7 and 3.8 nJ for the same crystal length.
Fig. 10. Second harmonic generation simulation determining the temporal length of the SHG pulse.
Table 1. Autocorrelation and spectral experimental data.
$\unicode[STIX]{x1D70F}_{\text{AC}}$ $\unicode[STIX]{x1D70F}_{\text{pulse}}$ $\unicode[STIX]{x0394}\unicode[STIX]{x1D706}$ $\unicode[STIX]{x1D70F}_{\text{pulse}}^{\text{TL}}$ View tableView in ArticleTable 1. Autocorrelation and spectral experimental data.
$\unicode[STIX]{x1D70F}_{\text{AC}}$ $\unicode[STIX]{x1D70F}_{\text{pulse}}$ $\unicode[STIX]{x0394}\unicode[STIX]{x1D706}$ $\unicode[STIX]{x1D70F}_{\text{pulse}}^{\text{TL}}$ $\unicode[STIX]{x1D706}$ $\unicode[STIX]{x1D70F}_{\text{AC}}$ $\unicode[STIX]{x1D70F}_{\text{pulse}}$ $\unicode[STIX]{x0394}\unicode[STIX]{x1D706}$ $\unicode[STIX]{x1D70F}_{\text{pulse}}^{\text{TL}}$ 1030 164 116 14.3 109 1054 174 123 16.1 101 1000 225 159 12.4 118 980 263 186 9.3 152
Table 2. SHG spectral experimental data.
$\unicode[STIX]{x0394}\unicode[STIX]{x1D706}$ $\unicode[STIX]{x1D70F}_{\text{SHG}}^{\text{TL}}$ View tableView in ArticleTable 2. SHG spectral experimental data.
$\unicode[STIX]{x0394}\unicode[STIX]{x1D706}$ $\unicode[STIX]{x1D70F}_{\text{SHG}}^{\text{TL}}$ $\unicode[STIX]{x1D706}$ $\unicode[STIX]{x0394}\unicode[STIX]{x1D706}$ $\unicode[STIX]{x1D70F}_{\text{SHG}}^{\text{TL}}$ 515 2.98 130.6 527 3.89 104.5 500 3.16 118.2 490 1.89 186.5
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Mario Galletti, Hugo Pires, Victor Hariton, Celso Paiva João, Swen Künzel, Marco Galimberti, Gonçalo Figueira. High efficiency second harmonic generation of nanojoule-level femtosecond pulses in the visible based on BiBO[J]. High Power Laser Science and Engineering, 2019, 7(1): 01000e11
Paper Information
Category: Research Articles
Received: Sep. 21, 2018
Accepted: Dec. 17, 2018
Published Online: Feb. 25, 2019
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