Characteristics of optical emission during laser-induced damage events of fused silica

Chao Shen; Nanjing Zhao; Jaka Pribošek; Mingjun Ma; Li Fang; Xingjiu Huang; Yujun Zhang

doi:doi:10.3788/COL201917.123002

Chinese Optics Letters, 2019, 17 (12): 123002, Published Online: Dec. 3, 2019

Characteristics of optical emission during laser-induced damage events of fused silica Download： 912次

Chao Shen ^1,2,*Nanjing Zhao ^1,2Jaka Pribošek ³Mingjun Ma ^1,2Li Fang ^1,2Xingjiu Huang ⁴Yujun Zhang ^5,**

Author Affiliations

¹ Key Laboratory of Environmental Optics & Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China

² Key Laboratory of Optical Monitoring Technology for Environment, Hefei 230031, China

³ Carinthian Tech Research, 9524 Villach, Austria

⁴ Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei 230031, China

⁵ State Key Laboratory of Pulsed Power Laser Technology, National University of Defense Technology, Hefei 230037, China

Figures & Tables

Fig. 1. Schematic of experimental setup. The inset is the image of air plasma. The red dashed line is the position of the sample surface, and the white arrow indicates the direction of the laser pulse. The arrangements of the camera and spectrometer are set as an example of the exit surface damage. HWP, half-wavelength plate; PBS, polarized beam splitter; BS, beam splitter; EM, energy meter; FL, focus lens; FC, fiber collector; MO, microscope objective; TL, tube lens.

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Fig. 2. Typical images of LPP on (a) the exit surface and (b) the input surface. Scanning electron microscope (SEM) morphologies of damage sites on (c) the exit surface and (d) the input surface.

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Fig. 3. (a) Evolution of plasma size with laser energy on the input and exit surfaces, and (b) the ratio between the driving energy on both surfaces deduced by Sedov–Taylor scaling.

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Fig. 4. Typical plasma emission spectra of bulk damage, exit surface damage, input surface damage, and air plasma from top to bottom. Lines superimposed on the bulk spectra are the fitted line and three Gaussian components. The wavelength range of the inset in the input surface spectra is 572–610 nm. The red arrow indicates the wavelength of 589.25 nm.

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Fig. 5. Evaluated electron density and excitation temperature of exit and input surface LPPs.

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Table1. Spectroscopic Data Used for Temperature Calculation

Species	$λ_{ji}$ (nm)	$A_{ji}$ ( $10^{7} s^{- 1}$ )	$g$	$E_{j}$ (eV)
O I	777.383	3.69	15	10.74
	844.646	3.22	9	10.99
	926.315	2.47	45	12.08

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Chao Shen, Nanjing Zhao, Jaka Pribošek, Mingjun Ma, Li Fang, Xingjiu Huang, Yujun Zhang. Characteristics of optical emission during laser-induced damage events of fused silica[J]. Chinese Optics Letters, 2019, 17(12): 123002.

Characteristics of optical emission during laser-induced damage events of fused silica Download： 912次

Fig. 2. Typical images of LPP on (a) the exit surface and (b) the input surface. Scanning electron microscope (SEM) morphologies of damage sites on (c) the exit surface and (d) the input surface.

Fig. 3. (a) Evolution of plasma size with laser energy on the input and exit surfaces, and (b) the ratio between the driving energy on both surfaces deduced by Sedov–Taylor scaling.

Fig. 5. Evaluated electron density and excitation temperature of exit and input surface LPPs.

Table1. Spectroscopic Data Used for Temperature Calculation

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Characteristics of optical emission during laser-induced damage events of fused silica Download： 912次

Fig. 2. Typical images of LPP on (a) the exit surface and (b) the input surface. Scanning electron microscope (SEM) morphologies of damage sites on (c) the exit surface and (d) the input surface.

Fig. 3. (a) Evolution of plasma size with laser energy on the input and exit surfaces, and (b) the ratio between the driving energy on both surfaces deduced by Sedov–Taylor scaling.

Fig. 5. Evaluated electron density and excitation temperature of exit and input surface LPPs.

Table1. Spectroscopic Data Used for Temperature Calculation

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