Comparison of beam quality parameters of two high-peak-power eximer laser beams

1997 ◽  
Author(s):  
Sarah Bollanti ◽  
Paolo Di Lazzaro ◽  
Francesco Flora ◽  
Gualtiero Giordano ◽  
Tommaso Letardi ◽  
...  
Keyword(s):  
Peak Power ◽  
Beam Quality ◽  
Quality Parameters ◽  
High Peak ◽  
Laser Beams ◽  
High Peak Power ◽  
Eximer Laser

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 High beam quality and high peak power Yb:YAG/Cr:YAG microchip laser

2019 ◽  
Vol 27 (1) ◽  
pp. 45 ◽  
Author(s):  
Xiaoyang Guo ◽  
Shigeki Tokita ◽  
Junji Kawanaka
Keyword(s):  
Peak Power ◽  
Beam Quality ◽  
Microchip Laser ◽  
High Peak ◽  
High Peak Power ◽  
High Beam ◽  
High Beam Quality

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

High-energy and high-peak-power nanosecond pulse generation with beam quality control in 200-µm core highly multimode Yb-doped fiber amplifiers

2005 ◽  
Vol 30 (4) ◽  
pp. 358 ◽  
Author(s):  
Ming-Yuan Cheng ◽  
Yu-Chung Chang ◽  
Almantas Galvanauskas ◽  
Pri Mamidipudi ◽  
Rupak Changkakoti ◽  
...  
Keyword(s):  
Quality Control ◽  
Peak Power ◽  
Beam Quality ◽  
High Energy ◽  
Pulse Generation ◽  
Nanosecond Pulse ◽  
Fiber Amplifiers ◽  
High Peak ◽  
High Peak Power

Fiber Delivered Systems for Laser Ignition of Natural Gas Engines

2006 ◽  
Author(s):  
Azer P. Yalin ◽  
Sachin Joshi ◽  
Adam Reynolds ◽  
Morgan Defoort ◽  
Bryan Willson ◽  
...  
Keyword(s):  
Peak Power ◽  
High Efficiency ◽  
Beam Quality ◽  
Past Research ◽  
Hollow Fibers ◽  
High Peak ◽  
Laser Ignition ◽  
High Peak Power ◽  
Beam Delivery ◽  
Pulse Energies

Past research has shown that laser ignition is capable of operating high bmep engines at high efficiency and with low emission levels. However, for laser ignition systems to be adopted by industry, one requires a practical (and economical) mode of beam delivery other than the conventional open-path beam delivery that has been used in much of the past research. One potential beam delivery method is via optical fibers capable of handling high peak power. This paper summarizes our recent efforts in this area. Using coated hollow fibers, our research group has demonstrated the delivery of laser pulses to form optical sparks both on the bench-top and for ignition and operation of a single cylinder of an ARES engine. When held relatively straight, the hollow fibers allow transmission of nanosecond pulse energies of 10s of milli-Joules with transmission above 90% and sufficient beam quality for spark formation. We have also been able to deliver optical sparks on the bench-top with high peak power pulsed fiber lasers. Pulse energies in those experiments were approximately 2 mJ. Other recent work has studied the transmission characteristics of recently developed photonic crystal fibers.

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.

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