Wei Shi, Xiaoyan Shang, Junhong Su, Chengang Dong. Terahertz Inspection of Laser-Induced Damage of Fused Silica[J]. Chinese Journal of Lasers, 2019, 46(6): 0614018
- Chinese Journal of Lasers
- Vol. 46, Issue 6, 0614018 (2019)
Fig. 1. Test principle of transmission terahertz time-domain spectral system
Fig. 2. Schematics of instrument for laser induced damage test
Fig. 3. Damage images of fused silica induced under different laser energies. (a) 50 mJ; (b) 60 mJ; (c) 70 mJ; (d) 80 mJ
Fig. 4. Schematics of sample test models. (a) Terahertz wave propagates in air; (b) terahertz wave penetrates into the sample
Fig. 5. Time-domain waveforms when tested. (a) Reference signal without the sample; (b) waveforms of undamaged and damaged areas in fused silica under different laser energies
Fig. 6. Amplitude spectra of reference signal, undamaged area and damaged areas in fused silica under different laser energies
Fig. 7. Transmission spectra of undamaged and damaged areas in fused silica under different laser energies
Fig. 8. Refractive index curves of undamaged and damaged areas in fused silica under different laser energies
Fig. 9. Absorbance curves of undamaged and damaged areas in fused silica under different laser energies
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Table 1. Peak-to-peak values of reference signal as well as time-domain waveforms of damaged and undamaged areas in fused silica 10-6arb.units
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