scholarly journals Comparative LIDT measurements of optical components for high-energy HiLASE lasers

2016 ◽  
Vol 4 ◽  
Author(s):  
Jan Vanda ◽  
Jan Ševčík ◽  
Egidijus Pupka ◽  
Mindaugas Ščiuka ◽  
Andrius Melninkaitis ◽  
...  
Keyword(s):  
Average Power ◽  
Damage Threshold ◽  
High Energy ◽  
Pulsed Lasers ◽  
High Average Power ◽  
Optical Components ◽  
Parallel Development ◽  
Laser Induced Damage

Further advancement of high-energy pulsed lasers requires a parallel development of appropriate optical components. Several different optical components, such as mirrors and antireflection-coated windows, which are essential for the design of HiLASE high average power lasers were tested. The following paper summarizes results on the measurements of laser-induced damage threshold of such components, and clearly shows their capabilities and limitations for such a demanding application.

Green Laser with High Energy, Narrow Pulse Width and High Average Power

2011 ◽  
Vol 48 (11) ◽  
pp. 111403
Author(s):  
李欣荣 Li Xinrong ◽  
孙琦 Sun Qi
Keyword(s):  
Pulse Width ◽  
Average Power ◽  
High Energy ◽  
Green Laser ◽  
High Average Power

scholarly journals Direct Amplification of High Energy Pulsed Laser in Fiber-Single Crystal Fiber with High Average Power

Crystals ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 216
Author(s):  
Feng Li ◽  
Zhi Yang ◽  
Zhiguo Lv ◽  
Yang Yang ◽  
Yishan Wang ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Single Crystal ◽  
Stimulated Raman Scattering ◽  
Average Power ◽  
High Energy ◽  
Laser Source ◽  
High Average Power ◽  
Double Pass ◽  
Two Stage ◽  
Crystal Fiber

A laser master oscillator power amplifier (MOPA) system consisting of a fiber amplifier and a two-stage Yb:YAG single crystal fiber (SCF) is experimentally studied. The nonlinear stimulated Raman scattering (SRS) is avoided by limiting the output power of the fiber preamplifier to 600 mW. Due to the benefit from the low nonlinearity and high amplification gain of the SCF, a laser pulse duration of 16.95 ps and a high average power of 41.7 W at a repetition rate of 250 kHz are obtained by using a two-stage polarization controlled double-pass amplification of Yb:YAG SCF, corresponding to an output energy of 166.8 μJ and a peak power of 9.84 MW, respectively. The polarization controlled SCF amplification scheme achieved a gain as high as more than 69 times. During the amplification, the spectra gain narrowing effect and the polarization controlled four-pass amplification setup are also studied. The laser spectrum is narrowed from over 10 nm to less than 3 nm, and the pulse width is also compressed to hundreds of femtosecond by dechirping the laser pulse. This compact-sized, cost-effective laser source can be used in laser micromachining, or as the seeder source for generating much higher power and energy laser for scientific research. For some applications which need femtosecond laser, this laser source can also be compressed to femtosecond regime.

scholarly journals Increasing the Laser-Induced Damage Threshold of Optical Components by Atmospheric Pressure Plasma Surface Finishing

2019 ◽  
Vol 215 ◽  
pp. 01003
Author(s):  
Christoph Gerhard ◽  
Marco Stappenbeck ◽  
Daniel Tasche
Keyword(s):  
Atmospheric Pressure ◽  
Discharge Plasma ◽  
Atmospheric Pressure Plasma ◽  
Damage Threshold ◽  
Surface Cleaning ◽  
Surface Finishing ◽  
Dielectric Barrier Discharge Plasma ◽  
Optical Components ◽  
Barrier Discharge Plasma ◽  
Laser Induced Damage

In this contribution, a plasma-based approach for finishing optics surfaces is introduced. Experiments were performed on classically manufactured zinc crown glass and sapphire. It is shown that the use of direct dielectric barrier discharge plasma at atmospheric pressure allows the removal of surface-adherent carbonaceous contaminations that were induced by classical manufacturing. Moreover, the use of such plasma leads to a certain decrease in surface roughness. Both effects, surface cleaning and smoothing finally increase the laser-induced damage threshold of optical components.

High average power, high energy femtosecond regenerative amplifiers

2012 ◽  
Author(s):  
Martin Delaigue ◽  
Robert Braunschweig ◽  
Clemens Hönninger ◽  
Eric Mottay
Keyword(s):  
Average Power ◽  
High Energy ◽  
High Average Power
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