High-repetition-rate and high-power efficient picosecond thin-disk regenerative amplifier

Sizhi Xu; Yubo Gao; Xing Liu; Yewang Chen; Deqin Ouyang; Junqing Zhao; Minqiu Liu; Xu Wu; Chunyu Guo; Cangtao Zhou; Qitao Lue; Shuangchen Ruan

doi:10.1017/hpl.2023.97

Journals >High Power Laser Science and Engineering >Volume 12 >Issue 2 >Page 02000e14 > Article

High Power Laser Science and Engineering
Vol. 12, Issue 2, 02000e14 (2024)

High-repetition-rate and high-power efficient picosecond thin-disk regenerative amplifier

Sizhi Xu¹, Yubo Gao¹, Xing Liu^1、*, Yewang Chen¹, Deqin Ouyang¹, Junqing Zhao¹, Minqiu Liu¹, Xu Wu¹, Chunyu Guo³, Cangtao Zhou⁴, Qitao Lue², and Shuangchen Ruan^1、*

Author Affiliations

¹Key Laboratory of Advanced Optical Precision Manufacturing Technology of Guangdong Higher Education Institutes, Sino-German College of Intelligent Manufacturing, Shenzhen Technology University, Shenzhen, China

²Han’s Laser Technology Industry Group Co., Ltd., Shenzhen, China

³Shenzhen Key Laboratory of Laser Engineering, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, China

⁴Shenzhen Key Laboratory of Ultraintense Laser and Advanced Material Technology, College of Engineering Physics, Shenzhen Technology University, Shenzhen, China

show less

DOI: 10.1017/hpl.2023.97 Cite this Article Set citation alerts

Sizhi Xu, Yubo Gao, Xing Liu, Yewang Chen, Deqin Ouyang, Junqing Zhao, Minqiu Liu, Xu Wu, Chunyu Guo, Cangtao Zhou, Qitao Lue, Shuangchen Ruan. High-repetition-rate and high-power efficient picosecond thin-disk regenerative amplifier[J]. High Power Laser Science and Engineering, 2024, 12(2): 02000e14 Copy Citation Text

EndNote(RIS)

BibTex

Plain Text

show less

Optical scheme of the regenerative amplifier. HWP, half-wave plate; QWP, quarter-wave plate; TFP1, TFP2, thin film polarizer; PC, Pockels cell; M1, M2, M5–M8, mirror; M3, M4, concave mirror.

Fig. 1. Optical scheme of the regenerative amplifier. HWP, half-wave plate; QWP, quarter-wave plate; TFP1, TFP2, thin film polarizer; PC, Pockels cell; M1, M2, M5–M8, mirror; M3, M4, concave mirror.

Download full size | View in the Article

Fig. 2. Thin-disk laser systems: (a) 48-pass pump system and (b) beam radius of the regenerative cavity.

Download full size | View in the Article

Fig. 3. FEM model for thin-disk Yb:YAG. (a) Mesh model and structure of the cooling system. (b) Temperature distribution.

Download full size | View in the Article

Fig. 4. Pump spot on the disk. (a) Pump profile. (b) Line-out. (c) Temperature distribution versus pump intensity. (d) Image from an infrared thermal camera.

Download full size | View in the Article

Fig. 5. Power characteristics of the thin-disk regenerative amplifier. (a) Pump power versus output power and efficiency at 1 MHz. (b) Average power and pulse energy at the maximum power versus repetition rate.

Download full size | View in the Article

Fig. 6. Temporal characteristics of the thin-disk regenerative amplifier. (a) Intracavity pulse build-up; n, number of roundtrips. (b) Temporal pulse trains.

Download full size | View in the Article

Fig. 7. (a) Measured autocorrelation traces of the amplified pulses. (b) Optical spectrum of the amplifier.

Download full size | View in the Article

Fig. 8. (a) Beam quality of the laser at 154.1 W. (b) Power stability of the laser at 154.1 W.

Download full size | View in the Article


Av. power (W)	PRF/kHz	Pulse width (ps)	M²	Pump power	Opt-opt eff.	Ref.
0.12	1	2.3	/	8 W@940 nm	1.5%	[18]
75	3	1.6	1.1	284 W@940 nm	26.4%	[24]
24	0.1	1.8	1.04	133 W@940 nm	18.0%	[25]
126	200	800	1.42	1.2 kW@940 nm	10.5%	[26]
56	200	0.534	1.24	150 W@969 nm	37.3%	[27]
550	92	2	1.4	1.25 kW@969 nm	44.0%	[20]
1950	20	0.8	/	4.5 kW@969 nm	43.3%	[23]
150	1000	6	<1.3	330 W@969 nm	45.4%	[28]
154	1000	6.82	1.06	260 W@969 nm	61.0%	This work

Table 1. Summary of published results from thin-disk regenerative amplifiers.

View in the Article


Material	Thermal conductivity (W/(m K))	Coefficient of thermal expansion (K⁻¹)	Density (kg/m³)	Coolant temperature (K)
Yb:YAG	6.5	6.3 × 10⁻⁶	4776.6	300
Diamond	1800	1 × 10⁻⁶	3515.0
Copper	388	1.7 × 10⁻⁵	8936.8