The Development of Ion-Etched Phase Plates
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چکیده
LLE Review, Volume 74 71 Laser-driven implosion experiments on the OMEGA laser depend on optical phase conversion to provide uniform irradiation onto a target. Phase errors that accumulate as a wavefront propagates through the laser produce a nonuniform irradiance when focused into the target far field. The distributed phase plate (DPP) introduces a quasi-random phase front that produces a high-spatial-frequency, uniform pattern with a controlled energy envelope.1 DPP’s are used in conjunction with smoothing by spectral dispersion (SSD) and distributed polarization rotation to provide very smooth intensity distribution on the target when integrated over the full pulse duration of the laser.2
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