Design and experimental demonstration of a high conversion efficiency OPCPA pre-amplifier for petawatt laser facility

Xiao Liang; Xinglong Xie; Jun Kang; Qingwei Yang; Hui Wei; Meizhi Sun; Jianqiang Zhu

doi:doi:10.1017/hpl.2018.52

High Power Laser Science and Engineering, 2018, 6 (4): 04000e58, Published Online: Dec. 27, 2018

Design and experimental demonstration of a high conversion efficiency OPCPA pre-amplifier for petawatt laser facility Download： 623次

Xiao Liang ^1,2Xinglong Xie ¹Jun Kang ¹Qingwei Yang ¹Hui Wei ¹Meizhi Sun ¹Jianqiang Zhu ¹

Author Affiliations

¹ National Laboratory on High Power Laser and Physics , Shanghai Institute of Optics and Fine Mechanics , Chinese Academy of Sciences , Shanghai 201800 , China

² University of Chinese Academy of Sciences , Beijing 100049 , China

Figures & Tables

Fig. 1. OPCPA pre-amplifier schematic and laser path diagram.

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Fig. 2. Two BBO crystals OPCPA in ‘L’ type configuration.

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Fig. 3. (a) Small signal gain bandwidth and (b) small signal gain versus various pump intensities. Different colors stand for different crystal lengths.

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Fig. 4. Signal gain of OPCPA stage 1. Different colors stand for different crystal length combinations.

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Fig. 5. OPCPA stage 1 output signal beam shape from: (a) one 46 mm long crystal; (b) two crystals in ‘L’ type configuration with length.

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Fig. 6. (a) Conversion efficiency and (b) EBP of two BBO crystal combination in ‘L’ type configuration at OPCPA stage 2.

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Fig. 7. OPA evolutionary process of signal at 808 nm and 765 nm wavelengths in stage 2. Crystals length combination in (a) and (b) is , while in (c) and (d) is . Red line represents signal, green line represents pump and blue line represents idler.

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Fig. 8. Signal output energy versus length of two BBO crystals. The first crystal length is 15 mm. The pump energy variation is to the initial 450 mJ. A and B correspond to BBO4 crystal lengths of 11 mm and 7.5 mm.

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Fig. 9. Signal output beam shape of OPCPA stage 2 for different lengths of BBO4 crystal. (a): 11 mm; (b) 7.5 mm; (c) 9 mm.

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Fig. 10. Measured experimental output signal spectrum from different OPCPA stages. (a) Spectra from signal seed (cyan line) and BBO2 (green line); (b) spectra from BBO3 (blue line) and BBO4 (red line).

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Table1. Simulation output parameters of OPCPA stage 1.

Energy	Gain	Spectrum FWHM	Pulse duration
5 mJ		64 nm	1.6 ns

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Table2. Simulation output parameters of OPCPA stage 2.

Energy	Conversion efficiency	Spectrum FWHM	Pulse duration
185 mJ	50%	80 nm	2 ns

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Table3. Experimental output parameters.

	Energy	Gain	Conv. eff.	Spectrum FWHM	Duration
Stage 1	3 mJ			60 nm	1.5 ns
Stage 2	160 mJ	53	43%	80 nm	2 ns

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Xiao Liang, Xinglong Xie, Jun Kang, Qingwei Yang, Hui Wei, Meizhi Sun, Jianqiang Zhu. Design and experimental demonstration of a high conversion efficiency OPCPA pre-amplifier for petawatt laser facility[J]. High Power Laser Science and Engineering, 2018, 6(4): 04000e58.

Design and experimental demonstration of a high conversion efficiency OPCPA pre-amplifier for petawatt laser facility Download： 623次

Fig. 1. OPCPA pre-amplifier schematic and laser path diagram.

Fig. 2. Two BBO crystals OPCPA in ‘L’ type configuration.

Fig. 3. (a) Small signal gain bandwidth and (b) small signal gain versus various pump intensities. Different colors stand for different crystal lengths.

Fig. 4. Signal gain of OPCPA stage 1. Different colors stand for different crystal length combinations.

Fig. 5. OPCPA stage 1 output signal beam shape from: (a) one 46 mm long crystal; (b) two crystals in ‘L’ type configuration with length.

Fig. 6. (a) Conversion efficiency and (b) EBP of two BBO crystal combination in ‘L’ type configuration at OPCPA stage 2.

Fig. 7. OPA evolutionary process of signal at 808 nm and 765 nm wavelengths in stage 2. Crystals length combination in (a) and (b) is , while in (c) and (d) is . Red line represents signal, green line represents pump and blue line represents idler.

Fig. 8. Signal output energy versus length of two BBO crystals. The first crystal length is 15 mm. The pump energy variation is to the initial 450 mJ. A and B correspond to BBO4 crystal lengths of 11 mm and 7.5 mm.

Fig. 9. Signal output beam shape of OPCPA stage 2 for different lengths of BBO4 crystal. (a): 11 mm; (b) 7.5 mm; (c) 9 mm.

Fig. 10. Measured experimental output signal spectrum from different OPCPA stages. (a) Spectra from signal seed (cyan line) and BBO2 (green line); (b) spectra from BBO3 (blue line) and BBO4 (red line).

Fig. 11. Measurement of the output energy over 5 min.

Fig. 12. CCD measured output signal near-field at 161 mJ.

Fig. 13. Measured compressed pulse duration by an autocorrelator.

Table1. Simulation output parameters of OPCPA stage 1.

Table2. Simulation output parameters of OPCPA stage 2.

Table3. Experimental output parameters.

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Design and experimental demonstration of a high conversion efficiency OPCPA pre-amplifier for petawatt laser facility Download： 623次

Fig. 1. OPCPA pre-amplifier schematic and laser path diagram.

Fig. 2. Two BBO crystals OPCPA in ‘L’ type configuration.

Fig. 3. (a) Small signal gain bandwidth and (b) small signal gain versus various pump intensities. Different colors stand for different crystal lengths.

Fig. 4. Signal gain of OPCPA stage 1. Different colors stand for different crystal length combinations.

Fig. 5. OPCPA stage 1 output signal beam shape from: (a) one 46 mm long crystal; (b) two crystals in ‘L’ type configuration with length.

Fig. 6. (a) Conversion efficiency and (b) EBP of two BBO crystal combination in ‘L’ type configuration at OPCPA stage 2.

Fig. 7. OPA evolutionary process of signal at 808 nm and 765 nm wavelengths in stage 2. Crystals length combination in (a) and (b) is , while in (c) and (d) is . Red line represents signal, green line represents pump and blue line represents idler.

Fig. 8. Signal output energy versus length of two BBO crystals. The first crystal length is 15 mm. The pump energy variation is to the initial 450 mJ. A and B correspond to BBO4 crystal lengths of 11 mm and 7.5 mm.

Fig. 9. Signal output beam shape of OPCPA stage 2 for different lengths of BBO4 crystal. (a): 11 mm; (b) 7.5 mm; (c) 9 mm.

Fig. 10. Measured experimental output signal spectrum from different OPCPA stages. (a) Spectra from signal seed (cyan line) and BBO2 (green line); (b) spectra from BBO3 (blue line) and BBO4 (red line).

Fig. 11. Measurement of the output energy over 5 min.

Fig. 12. CCD measured output signal near-field at 161 mJ.

Fig. 13. Measured compressed pulse duration by an autocorrelator.

Table1. Simulation output parameters of OPCPA stage 1.

Table2. Simulation output parameters of OPCPA stage 2.

Table3. Experimental output parameters.

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