scholarly journals Exploitation of stimulated Raman scattering in short-pulse fiber amplifiers

2010 ◽  
Vol 35 (14) ◽  
pp. 2397 ◽  
Author(s):  
Shian Zhou ◽  
Tetsuji Takamido ◽  
Shinji Imai ◽  
Frank Wise
Keyword(s):  
Raman Scattering ◽  
Stimulated Raman Scattering ◽  
Short Pulse ◽  
Fiber Amplifiers ◽  
Stimulated Raman

scholarly journals Dynamic characteristics of stimulated Raman scattering in high power fiber amplifiers in the presence of mode instabilities

2018 ◽  
Vol 26 (19) ◽  
pp. 25098 ◽  
Author(s):  
Rumao Tao ◽  
Hu Xiao ◽  
Hanwei Zhang ◽  
Jinyong Leng ◽  
Xiaolin Wang ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Dynamic Characteristics ◽  
High Power ◽  
Stimulated Raman Scattering ◽  
Fiber Amplifiers ◽  
Stimulated Raman

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.

scholarly journals Investigation of stimulated Raman scattering using a short-pulse diffraction limited laser beam near the instability threshold

2009 ◽  
Vol 27 (1) ◽  
pp. 185-190 ◽  
Author(s):  
J.L. Kline ◽  
D.S. Montgomery ◽  
C. Rousseaux ◽  
S.D. Baton ◽  
V. Tassin ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Laser Plasma ◽  
Stimulated Raman Scattering ◽  
Short Pulse ◽  
Electron Plasma ◽  
Thomson Scattering ◽  
Wave Number ◽  
Particle In Cell ◽  
Laser Facility ◽  
Stimulated Raman

AbstractShort pulse laser plasma interaction experiments using diffraction limited beams provide an excellent platform to investigate the fundamental physics of stimulated Raman scattering. Detailed understanding of these laser plasma instabilities impacts the current inertial confinement fusion ignition designs and could potentially impact fast ignition when higher energy lasers are used with longer pulse durations (>1 kJ and >1 ps). Using short laser pulses, experiments can be modeled over the entire interaction time of the laser using particle-in-cell codes to validate our understanding quantitatively. Experiments have been conducted at the Trident laser facility and the Laboratoire pour l'Utilisation des Lasers Intenses (LULI) to investigate stimulated Raman scattering near the threshold of the instability using 527 nm and 1059 nm laser light, respectively, with 1.5–3.0 ps pulses. In both experiments, the interaction beam was focused into pre-ionized helium gas-jet plasma. Measurements of the reflectivity as a function of intensity and kλD were completed at the Trident laser facility, where k is the electron plasma wave number and λD is the plasma Debye length. At LULI, a 300 fs Thomson scattering probe is used to directly measure the density fluctuations of the driven electron plasma and ion acoustic waves. Work is currently underway comparing the results of the experiments with simulations using the VPIC particle-in-cell code. Details of the experimental results are presented in this manuscript.

Analytical study on the stimulated Raman scattering threshold in distributed-pumped fiber amplifiers

2019 ◽  
Vol 58 (8) ◽  
pp. 2010 ◽  
Author(s):  
Heting Du ◽  
Jianqiu Cao ◽  
Heng Chen ◽  
Zhihe Huang ◽  
Jinbao Chen
Keyword(s):  
Raman Scattering ◽  
Analytical Study ◽  
Stimulated Raman Scattering ◽  
Fiber Amplifiers ◽  
Stimulated Raman

Investigation of stimulated Raman scattering in high-power co-pumping fiber amplifiers

Laser Physics ◽  
2018 ◽  
Vol 28 (10) ◽  
pp. 105105
Author(s):  
Jinkun Zheng ◽  
Wei Zhao ◽  
Baoyin Zhao ◽  
Zhe Li ◽  
Gang Li ◽  
...  
Keyword(s):  
Raman Scattering ◽  
High Power ◽  
Stimulated Raman Scattering ◽  
Fiber Amplifiers ◽  
Stimulated Raman
Sign in / Sign up

Export Citation Format

Share Document