Presentation 1996/6/21
Controls of Polarization and Phase Distributions by Using Liquid Crystal
Keiichi Sueda, Kouji Tsubakimoto, Noriaki Miyanaga, Masanori Nakatsuka,
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Abstract(in English) In the direct drive laser fusion, the smoothness of the intensity pattern of each beam has been improved by the use of the random phase plate. However an intensity distribution of the whole beam in a far field region consists of speckles due to random interference. We are investigating the polarization control for the instantaneous speckle smoothing to overcome this problems. To smooth the speckles using polarization control, we need a laser beam consists of two components of which polarization direction are orthogonal to each other. We used a half wave plate array of segmented nematic liquid crystal. We have demonstrated the alignment control of liquid crystal using photoisomerization induced by polarized UV laser to fabricate the PCP with the nonrubbing method. The speckle contrast was reduced by a factor of 30%.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) ICF / polarization / nematic liquid crystal / photoisomerization / methyl orange / phase distribution
Paper # EID96-14
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Conference Date 1996/6/21(1days)
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Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) Controls of Polarization and Phase Distributions by Using Liquid Crystal
Sub Title (in English)
Keyword(1) ICF
Keyword(2) polarization
Keyword(3) nematic liquid crystal
Keyword(4) photoisomerization
Keyword(5) methyl orange
Keyword(6) phase distribution
1st Author's Name Keiichi Sueda
1st Author's Affiliation Institute of Laser Engineering, Osaka University()
2nd Author's Name Kouji Tsubakimoto
2nd Author's Affiliation Institute for Laser Technology
3rd Author's Name Noriaki Miyanaga
3rd Author's Affiliation Institute of Laser Engineering, Osaka University
4th Author's Name Masanori Nakatsuka
4th Author's Affiliation Institute of Laser Engineering, Osaka University
Date 1996/6/21
Paper # EID96-14
Volume (vol) vol.96
Number (no) 106
Page pp.pp.-
#Pages 3
Date of Issue