Long Pulse Laser Amplification of Yb∶YAG Planar Waveguide with High Energy

Dongsheng Liu; Jinchuan Wang; Liu Xu; Jialin Du; Ping He; Liang Tan; Yanan Wang; Dan Wang; Juntao Wang; Tangjian Zhou; Jianli Shang; Qingsong Gao

doi:10.3788/CJL202148.1601004

Chinese Journal of Lasers, Volume. 48, Issue 16, 1601004(2021)

Long Pulse Laser Amplification of Yb∶YAG Planar Waveguide with High Energy

Dongsheng Liu^1,2,3, Jinchuan Wang^1,2,3, Liu Xu^1,2, Jialin Du^1,2, Ping He^1,2, Liang Tan^1,2, Yanan Wang^1,2, Dan Wang^1,2, Juntao Wang^1,2、*, Tangjian Zhou^1,2, Jianli Shang^1,2, and Qingsong Gao^1,2

Author Affiliations

¹Institute of Applied Electronics China Academy of Engineering Physics, Mianyang, Sichuan 621900, China

²Key Laboratory of Science and Technology on High Energy Laser China Academy of Engineering Physics, Mianyang, Sichuan 621900, China

³Graduate School China Academy of Engineering Physics, Beijing 100088, China

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Figures & Tables(13)

Fig. 1. Structural diagram of planar waveguide

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Fig. 2. Schematic of 1030 nm laser amplifier

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Fig. 3. Yb∶YAG laser transition energy level diagram

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Fig. 4. Instantaneous output power curves under different seed light intensities

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Fig. 5. Instantaneous output power curves under different pump powers

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Fig. 6. Instantaneous output power curves under different pulse widths

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Fig. 7. Curves of output energy and optical-optical conversion efficiency with pump power under double-ended pumping

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Fig. 8. Beam quality at pulse repetition frequency of 50 Hz

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Fig. 9. Beam quality at pulse repetition frequency of 250 Hz

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Fig. 10. Beam quality at pulse repetition frequency of 400 Hz

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Fig. 11. Spectrum. (a) Seed laser; (b) amplified laser

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Table 1. Output results under different injected laser intensities

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Table 1. Output results under different injected laser intensities

Input power of seed laser /W	Input laserintensity /(kW·cm^-2)	Time from 0 to90% of steadystate power /μs	Output energy /J	Optical-opticalefficiency of singlepulse /%	Optical-opticalefficiency of steadystate /%
220	7.3	161	4.56	43.6	55.9
370	12.3	147	4.95	46.9	58.9
520	17.3	137	5.23	48.7	61.0
670	22.3	130	5.45	50.1	62.7
820	27.3	124	5.63	51.2	64.1
970	32.3	120	5.79	52.0	65.4
1120	37.3	116	5.94	52.7	66.5

Table 2. Output results under different pump laser intensities

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Table 2. Output results under different pump laser intensities

Pumppower /kW	Pump intensity /(kW·cm^-2)	Time from 0 to 90% of steady state power /μs	Outputenergy /J	Optical-optical efficiency of single pulse /%	Optical-optical efficiency of steady state /%
10.2	20	262	1.99	35.5	55.6
20.4	40	147	4.96	46.8	59.5
30.6	60	104	7.96	50.8	59.6
40.8	80	81	10.93	52.6	59.6

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Dongsheng Liu, Jinchuan Wang, Liu Xu, Jialin Du, Ping He, Liang Tan, Yanan Wang, Dan Wang, Juntao Wang, Tangjian Zhou, Jianli Shang, Qingsong Gao. Long Pulse Laser Amplification of Yb∶YAG Planar Waveguide with High Energy[J]. Chinese Journal of Lasers, 2021, 48(16): 1601004

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Paper Information

Category: laser devices and laser physics

Received: Dec. 30, 2020

Accepted: Feb. 22, 2021

Published Online: Jul. 30, 2021

The Author Email: Juntao Wang (wji_caep@126.com)

DOI:10.3788/CJL202148.1601004

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology