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Proceedings Paper

Calculation on self-focusing of amplified partially coherent light with peaky electric field
Author(s): Taku Saiki; Thierry Bontoux; Noriaki Miyanaga; Hisanori Fujita; Hidetsugu Yoshida; Takayasu Sakamoto; Masahiro Nakatsuka; Tadashi Kanabe; Sadao Nakai
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Paper Abstract

Propagation and amplification of partial coherent light (PCL) is simulated with a 3-D propagation code and fast Fourier transformation. The PCL is useful to realize highly uniform irradiation on a target in internal confinement fusion. On the other hand, the PCL has speckle structure in space and time owing to partial coherence. The intensity modulation due to speckles is enhanced by self-focusing in laser glasses due to nonlinear refractive index. Calculations on the laser propagation for the PCL show that the speckles of cm scale self-focus to 10 mm scale. As a result, average fluence of the PCL is limited at lower level comparing with that of the coherent laser. Experimental results are also coincident with the simulation results.

Paper Details

Date Published: 3 April 2000
PDF: 6 pages
Proc. SPIE 3889, Advanced High-Power Lasers, (3 April 2000); doi: 10.1117/12.380871
Show Author Affiliations
Taku Saiki, Osaka Univ. (Japan)
Thierry Bontoux, Osaka Univ. (Japan)
Noriaki Miyanaga, Osaka Univ. (Japan)
Hisanori Fujita, Osaka Univ. (Japan)
Hidetsugu Yoshida, Osaka Univ. (Japan)
Takayasu Sakamoto, Osaka Univ. (Japan)
Masahiro Nakatsuka, Osaka Univ. (Japan)
Tadashi Kanabe, Osaka Univ. (Japan)
Sadao Nakai, Osaka Univ. (Japan)

Published in SPIE Proceedings Vol. 3889:
Advanced High-Power Lasers
Marek Osinski; Howard T. Powell; Koichi Toyoda, Editor(s)

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