Study on the measurement system of laser beam quality for long distance propagation

2019 ◽  
Author(s):  
Jie Fu ◽  
Baolin Du ◽  
Dezhao Zhou ◽  
Li Li ◽  
Leili Hu
Keyword(s):  
Laser Beam ◽  
Measurement System ◽  
Beam Quality ◽  
Long Distance ◽  
Laser Beam Quality ◽  
Distance Propagation

scholarly journals Fabrication of 2 kW-Level Chirped and Tilted Fiber Bragg Gratings and Mitigating Stimulated Raman Scattering in Long-Distance Delivery of High-Power Fiber Laser

Photonics ◽  
2021 ◽  
Vol 8 (9) ◽  
pp. 369
Author(s):  
Xiaofan Zhao ◽  
Xin Tian ◽  
Meng Wang ◽  
Binyu Rao ◽  
Hongye Li ◽  
...  
Keyword(s):  
Laser Beam ◽  
Fiber Laser ◽  
High Power ◽  
Fiber Lasers ◽  
Stimulated Raman Scattering ◽  
Beam Quality ◽  
Fiber Bragg Gratings ◽  
Long Distance ◽  
Laser Beam Quality ◽  
Distance Delivery

Chirped and tilted fiber Bragg gratings (CTFBGs) have attracted a lot of attention in stimulated Raman scattering (SRS) suppression of high-power fiber lasers. However, the laser power handling capacity seriously limits their applications. In this paper, by optimizing the inscription parameters and post-processing strategy, we fabricate a large-mode-area double-cladding CTFBG with a thermal slope of ~0.015 °C/W due to the low insertion loss of about 0.15 dB, which make it possible for direct kilowatt-level application. A 2 kW-level fiber laser oscillator is employed to test the CTFBG, and a series of experiments have been carried out to compare the effect of SRS mitigation in high-power fiber laser long-distance delivery. In addition, the influence of CTFBGs on laser beam quality is studied for the first time. Experimental results indicated that the CTFBG could effectively mitigate SRS and has no obvious influence on laser beam quality. This work opens a new opportunity for further power scaling and the delivery of high-power fiber lasers over longer distances.

Measurement system with high accuracy for laser beam quality

2015 ◽  
Vol 54 (15) ◽  
pp. 4876 ◽  
Author(s):  
Yi Ke ◽  
Ciling Zeng ◽  
Peiyuan Xie ◽  
Qingshan Jiang ◽  
Ke Liang ◽  
...  
Keyword(s):  
Laser Beam ◽  
Measurement System ◽  
Beam Quality ◽  
High Accuracy ◽  
Laser Beam Quality

On-line control of laser beam quality by means of diffractive optical components

2003 ◽  
Author(s):  
Michael R. Duparre ◽  
Carsten Rockstuhl ◽  
Andreas Letsch ◽  
Siegmund Schroeter ◽  
Vladimir S. Pavelyev
Keyword(s):  
Laser Beam ◽  
Beam Quality ◽  
Optical Components ◽  
On Line ◽  
Laser Beam Quality

scholarly journals Laser beam quality and pointing measurement with an optical resonator

2007 ◽  
Vol 78 (7) ◽  
pp. 073103 ◽  
Author(s):  
Patrick Kwee ◽  
Frank Seifert ◽  
Benno Willke ◽  
Karsten Danzmann
Keyword(s):  
Laser Beam ◽  
Beam Quality ◽  
Optical Resonator ◽  
Laser Beam Quality
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