Radial Beam Smoothing Method Based on Optical Kerr Effect in Inertial Confinement Fusion Device
A technology of inertial confinement fusion and optical Kerr effect, applied in the field of beam smoothing, can solve problems such as difficult adjustment and complex optical path structure, and achieve the effects of improving uniformity, fast zooming, and realizing beam smoothing
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Embodiment 1
[0053] The optical Kerr medium used in this embodiment is graphene, because of its characteristics such as high optical Kerr coefficient, high damage threshold and large light aperture, the parameters of graphene are: optical Kerr coefficient n 2 =6×10 -8 cm 2 / W, thickness d=0.5nm, size 40×40mm; Gaussian pulse wavelength λ=808nm output by the tunable picosecond laser 11, and the pulse width of full width at half maximum is T w =2.2ps, pulse peak intensity I p =0.2GW / cm 2 , the time delay factor h=3.3 between multiple optical fibers in the fiber pulse stacking unit 12, and the integration time Δt=10ps; the picosecond laser 11 is a tunable picosecond laser; the filter element is an optical rotator.
[0054] The specific operation steps are as follows:
[0055] (1) First, in the optical transmission chain of the laser-driven inertial confinement fusion device, a radial beam smoothing device is added, and the output light wavelength is selected as a tunable picosecond laser 1...
Embodiment 2
[0083] The optical Kerr medium 4 used in this embodiment is carbon disulfide (CS 2 ), its parameter is: optical Kerr coefficient n 2 =2.1×10 -15 cm 2 / W, thickness d=0.45mm, size 40×40mm; the Gaussian pulse wavelength output by the tunable picosecond laser 11 is λ=800nm, and the pulse width T of full width at half maximum w =2.2ps, pulse peak intensity I p =63.5GW / cm 2 , the time delay factor of the fiber pulse accumulation unit 12 is h=3.3, and the integration time Δt=10 ps; the filter element is a filter. The other operation steps and operation process are the same as those in Embodiment 1, and the same effect of improving the uniformity of the far-field focal spot of the laser beam as in Embodiment 1 can also be obtained.
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