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초강력 레이저 과학 연구단
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Polarization of amplified spontaneous emission in a plasma active medium

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Title
Polarization of amplified spontaneous emission in a plasma active medium
Author(s)
Chul Min Kim; H. Stiel; B.Matous; M.Nishikino; N.Hasegawa; T.Kawachi; K.A.Tran; Karol Adam Janulewicz
Publication Date
2015-10
Journal
PHYSICAL REVIEW A, v.92, no.4, pp.043807 -
Publisher
AMER PHYSICAL SOC
Abstract
We present polarization measurement of a Ni-like Ag x-ray laser working in the transient collisional excitation scheme. A calibrated membrane multilayer beam splitter was used to determine the energies of two mutually perpendicular polarization components (s and p components). As a result, we observed a high degree of polarization that fluctuated from shot to shot. The dominant polarization component switched from s to p when pumping was made stronger. The measurement results are discussed from the point of view of the general polarization theory and supported by a numerical simulation based on Maxwell-Bloch equations. The physical processes causing the dominance of one polarization component are discussed in terms of pumping strength. These results should extend the wave physics perspective on the amplification process, transforming a weak random noise into a strong coherent radiation.
URI
http://pr.ibs.re.kr/handle/8788114/1851
DOI
10.1103/PhysRevA.92.043807
ISSN
2469-9926
Appears in Collections:
Center for Relativistic Laser Science(초강력 레이저과학 연구단) > Journal Papers (저널논문)
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