scholarly journals A High Peak Power and High Beam Quality Sub-Nanosecond Nd:YVO4 Laser System at 1 kHz Repetition Rate without SRS Process

2019 ◽  
Vol 9 (23) ◽  
pp. 5247
Author(s):  
Yutao Huang ◽  
Hongbo Zhang ◽  
Xiaochao Yan ◽  
Zhijun Kang ◽  
Fuqiang Lian ◽  
...  
Keyword(s):  
Peak Power ◽  
Stimulated Raman Scattering ◽  
Beam Quality ◽  
Laser System ◽  
Average Power ◽  
Green Light ◽  
Frequency Doubling ◽  
High Peak ◽  
High Peak Power ◽  
Maximum Output

We present a compact sub-nanosecond diode-end-pumped Nd:YVO 4 laser system running at 1 kHz. A maximum output energy of 65.4 mJ without significant stimulated Raman scattering (SRS) process was obtained with a pulse duration of 600 ps, corresponding to a pulse peak power of 109 MW. Laser pulses from this system had good beam quality, where M 2 < 1.6, and the excellent signal to noise ratio was more than 42 dB. By frequency doubling with an LBO crystal, 532 nm green light with an average power of 40.5 W and a power stability of 0.28% was achieved. The diode-end-pumped pump power limitation on a high peak power amplifier caused by the SRS process and thermal fracture in bulk Nd:YVO 4 crystal is also analyzed.

High-peak-power, high-energy, high-average-power pulsed fiber laser system with versatile pulse duration and shape

2013 ◽  
Vol 38 (22) ◽  
pp. 4686 ◽  
Author(s):  
A. Malinowski ◽  
P. Gorman ◽  
C. A. Codemard ◽  
F. Ghiringhelli ◽  
A. J. Boyland ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Pulse Duration ◽  
Peak Power ◽  
Laser System ◽  
Average Power ◽  
High Energy ◽  
High Peak ◽  
High Peak Power ◽  
High Average Power ◽  
Pulsed Fiber Laser

High Peak Power and High Beam Quality Fiber-Solid Hybrid Amplification Laser System

2018 ◽  
Vol 45 (4) ◽  
pp. 0401007 ◽  
Author(s):  
汪勇 Wang Yong ◽  
刘斌 Liu Bin ◽  
叶志斌 Ye Zhibin ◽  
徐霜馥 Xu Shuangfu ◽  
唐超 Tang Chao ◽  
...  
Keyword(s):  
Peak Power ◽  
Beam Quality ◽  
Laser System ◽  
High Peak ◽  
High Peak Power ◽  
High Beam ◽  
High Beam Quality

scholarly journals Quasi-Parametric Chirped-Pulse Amplification Simultaneously Enables High Peak Power and High Average Power

2019 ◽  
Vol 11 (4) ◽  
pp. 1-12 ◽  
Author(s):  
Zhe Yin ◽  
Jingui Ma ◽  
Jing Wang ◽  
Peng Yuan ◽  
Guoqiang Xie ◽  
...  
Keyword(s):  
Peak Power ◽  
Average Power ◽  
High Peak ◽  
High Peak Power ◽  
High Average Power ◽  
Chirped Pulse ◽  
Pulse Amplification ◽  
Chirped Pulse Amplification

Diode-pumped 1 kW Q-switched Nd:YAG rod laser with high peak power and high beam quality

2005 ◽  
Vol 44 (19) ◽  
pp. 4119 ◽  
Author(s):  
Keisuke Furuta ◽  
Tetsuo Kojima ◽  
Shuichi Fujikawa ◽  
Jun-ichi Nishimae
Keyword(s):  
Peak Power ◽  
Beam Quality ◽  
High Peak ◽  
High Peak Power ◽  
High Beam ◽  
Diode Pumped ◽  
High Beam Quality

scholarly journals Mitigation of stimulated Raman scattering in kilowatt-level diode-pumped fiber amplifiers with chirped and tilted fiber Bragg gratings

2019 ◽  
Vol 7 ◽  
Author(s):  
Meng Wang ◽  
Le Liu ◽  
Zefeng Wang ◽  
Xiaoming Xi ◽  
Xiaojun Xu
Keyword(s):  
Raman Scattering ◽  
Fiber Lasers ◽  
Stimulated Raman Scattering ◽  
Beam Quality ◽  
Average Power ◽  
Fiber Amplifiers ◽  
Maximum Output ◽  
Power Scaling ◽  
Diode Pumped ◽  
Stimulated Raman

The average power of diode-pumped fiber lasers has been developed deeply into the kW regime in the past years. However, stimulated Raman scattering (SRS) is still a major factor limiting the further power scaling. Here, we have demonstrated the mitigation of SRS in kilowatt-level diode-pumped fiber amplifiers using a chirped and tilted fiber Bragg grating (CTFBG) for the first time. The CTFBG is designed and inscribed in large-mode-area (LMA) fibers, matching with the operating wavelength of the fiber amplifier. With the CTFBG inserted between the seed laser and the amplifier stage, an SRS suppression ratio of ${\sim}10~\text{dB}$ is achieved in spectrum at the maximum output laser power of 2.35 kW, and there is no reduction in laser slope efficiency and degradation in beam quality. This work proves the feasibility and practicability of CTFBGs for SRS suppression in high-power fiber lasers, which is very useful for the further power scaling.

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