Diffraction and self-focusing during amplification of high-power light pulses. II. Suppression of harmful influence of diffraction and self-focusing on a laser beam

1975 ◽  
Vol 4 (11) ◽  
pp. 1362-1366 ◽  
Author(s):  
N B Baranova ◽  
N E Bykovskii ◽  
Boris Ya Zel'dovich ◽  
Yu V Senatskii
Keyword(s):  
Laser Beam ◽  
High Power ◽  
Light Pulses ◽  
Self Focusing

scholarly journals Propagation characteristics of a high-power broadband laser beam passing through a nonlinear optical medium with defects

2013 ◽  
Vol 1 (3-4) ◽  
pp. 132-137 ◽  
Author(s):  
Xueqiong Chen ◽  
Xiaoyan Li ◽  
Ziyang Chen ◽  
Jixiong Pu ◽  
Guowen Zhang ◽  
...  
Keyword(s):  
Light Intensity ◽  
Laser Beam ◽  
High Power ◽  
Nonlinear Optical ◽  
Incident Light ◽  
Nonlinear Optical Effect ◽  
Optical Elements ◽  
Optical Medium ◽  
Self Focusing ◽  
Broadband Laser

AbstractThe intensity distributions of a high-power broadband laser beam passing through a nonlinear optical medium with defects and then propagating in free space are investigated based on the general nonlinear Schrödinger equation and the split-step Fourier numerical method. The influences of the bandwidth of the laser beam, the thickness of the medium, and the defects on the light intensity distribution are revealed. We find that the nonlinear optical effect can be suppressed and that the uniformity of the beam can be improved for a high-power broadband laser beam with appropriate wide bandwidth. It is also found that, under the same incident light intensity, a thicker medium will lead to a stronger self-focusing intensity, and that the influence of defects in the optical elements on the intensity is stronger for a narrowband beam than for a broadband beam.

Cutting of steels by high-power CO laser beam

1988 ◽  
Author(s):  
Shunich Sato ◽  
Kunimitsu Takahashi ◽  
Hideaki Saito ◽  
Masato Sugimoto ◽  
Tomoo Fujioka ◽  
...  
Keyword(s):  
Laser Beam ◽  
High Power ◽  
Co Laser

Self-focusing of cosh-Gaussian laser beam in collisional plasma: effect of nonlinear absorption

2021 ◽  
Author(s):  
Naveen Gupta ◽  
Sandeep Kumar ◽  
A Gnaneshwaran ◽  
Sanjeev Kumar ◽  
Suman Choudhry
Keyword(s):  
Laser Beam ◽  
Nonlinear Absorption ◽  
Collisional Plasma ◽  
Gaussian Laser Beam ◽  
Self Focusing ◽  
Plasma Effect

scholarly journals Investigation of serial coherent laser beam combination based on Brillouin amplification

2007 ◽  
Vol 25 (1) ◽  
pp. 79-83 ◽  
Author(s):  
SHUANGYI WANG ◽  
ZHIWEI LÜ ◽  
DIANYANG LIN ◽  
LEI DING ◽  
DONGBIN JIANG
Keyword(s):  
Laser Beam ◽  
High Power ◽  
Simple Structure ◽  
Low Cost ◽  
Coupling Efficiency ◽  
Laser Beams ◽  
Beam Combination ◽  
Multiple Beams ◽  
Combination Scheme ◽  
Stokes Beam

Based on transferring energy from multiple pump beams into one Stokes beam using Brillouin amplification, a serial coherent laser beam combination scheme is presented, which has many advantages, such as, simple structure, low cost, ease of adjustment, higher load capability, scalable easily, etc. Furthermore, it has been demonstrated that the combination of several beams using this method is theoretically possible. But in practice, the amplification of high power Stokes beam is a key problem to solve. In this paper, the amplification of Stokes beam whose power is higher than the pump beam is first studied and proved experimentally. Coupling the two laser beams by this method is proved experimentally, and the coupling efficiency reaches more than 80%. Then the feasibility of multiple beams combination based on Brillouin amplification is analyzed and tested theoretically.

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