Near‑20‑MW Peak Power Sub‑Nanosecond Pulsed Laser Operating at 1‑kHz Repetition Rate

Fangjie Li; Kai Zhong; Jing Chi; Hongzhan Qiao; Yizhe Zheng; Yuxin Liu; Kai Chen; Jining Li; Degang Xu; Jianquan Yao

doi:10.3788/CJL241410

Chinese Journal of Lasers, Volume. 52, Issue 10, 1001007(2025)

Near‑20‑MW Peak Power Sub‑Nanosecond Pulsed Laser Operating at 1‑kHz Repetition Rate

Fangjie Li^1,2,3, Kai Zhong^1,2,3、*, Jing Chi^1,2,3, Hongzhan Qiao^1,2,3, Yizhe Zheng^1,2,3, Yuxin Liu^1,2,3, Kai Chen^1,2,3, Jining Li^1,2,3, Degang Xu^1,2,3, and Jianquan Yao^1,2,3

Author Affiliations

¹School of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China

²Key Laboratory of Optoelectronics Information Technology, Ministry of Education, Tianjin University, Tianjin 300072, China

³Key Laboratory of Micro Optical Electronic Mechanical System Technology, Ministry of Education, Tianjin University, Tianjin 300072, China

show less

Abstract Get PDF(in Chinese)

Figures & Tables(8)

Fig. 1. Temperature distributions of bonded crystals in two amplifying stages

Download full size

$OPD introduced by change of thermal-induced refractive index at different radial positions$

Fig. 2. OPD introduced by change of thermal-induced refractive index at different radial positions

Download full size

Fig. 3. Schematic diagram of two-stage end-pumped dual-pass MOPA sub-nanosecond laser system based on spherical aberration self-compensation

Download full size

Fig. 4. Output characteristics of seed laser. (a) Single pulse waveform; (b) beam quality factor with spot profile recorded by camera shown in inset

Download full size

Fig. 5. Output characteristics of first-stage amplification laser . (a) Relationship between output power and pump power; (b) beam quality factor with spot profile recorded by camera shown in inset

Download full size

Fig. 6. Output characteristics of second-stage amplification laser . (a) Relationship between output power and pump power; (b) beam quality factor with spot profile recorded by camera shown in inset

Download full size

Fig. 7. Temporal pulse and power stability of second-stage amplification laser . (a) Pulse sequence; (b) single pulse waveform; (c) power stability

Download full size

Table 1. Related parameters for thermal-distribution simulation in two amplifying stages

View table

Table 1. Related parameters for thermal-distribution simulation in two amplifying stages

Simulation parameter	Value
Absorption coefficient α/mm^-1	0.374
Refractive index of gain medium n	1.82
Pump wavelength λ_p/nm	808
Thermal conversion coefficient η	0.24
Undoped YAG length a/mm	4
Nd∶YAG length b/mm	25
Crystal rod radius r₀/mm	1.5
Pump beam quality factor M²	25
Thermal conduction coefficient K_c/［W·（m^-1·K^-1）］	13
Thermal-optic coefficient /K^-1	7.3×10^-6
Pump waist radius ω₀/mm	0.45/0.6
Input pump power P_in/W	37/40
Water cooling temperature T₀/℃	16

Tools

Get Citation

Copy Citation Text

Fangjie Li, Kai Zhong, Jing Chi, Hongzhan Qiao, Yizhe Zheng, Yuxin Liu, Kai Chen, Jining Li, Degang Xu, Jianquan Yao. Near‑20‑MW Peak Power Sub‑Nanosecond Pulsed Laser Operating at 1‑kHz Repetition Rate[J]. Chinese Journal of Lasers, 2025, 52(10): 1001007

Download Citation

EndNote(RIS)BibTex Plain Text

Set citation alerts for article

Save article for my favorites