Calculation on self-focusing of amplified partially coherent light with peaky electric field

Taku Saiki; Thierry Bontoux; Noriaki Miyanaga; Hisanori Fujita; Hidetsugu Yoshida; Takayasu Sakamoto; Masahiro Nakatsuka; Tadashi Kanabe; Sadao Nakai

doi:10.1117/12.380871

3 April 2000 Calculation on self-focusing of amplified partially coherent light with peaky electric field

Taku Saiki, Thierry Bontoux, Noriaki Miyanaga, Hisanori Fujita, Hidetsugu Yoshida, Takayasu Sakamoto, Masahiro Nakatsuka, Tadashi Kanabe, Sadao Nakai

Author Affiliations +

Proceedings Volume 3889, Advanced High-Power Lasers; (2000) https://doi.org/10.1117/12.380871
Event: Advanced High-Power Lasers and Applications, 1999, Osaka, Japan

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.

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Taku Saiki, Thierry Bontoux, Noriaki Miyanaga, Hisanori Fujita, Hidetsugu Yoshida, Takayasu Sakamoto, Masahiro Nakatsuka, Tadashi Kanabe, and Sadao Nakai "Calculation on self-focusing of amplified partially coherent light with peaky electric field", Proc. SPIE 3889, Advanced High-Power Lasers, (3 April 2000); https://doi.org/10.1117/12.380871

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