Pinhole closure in spatial filters of large-scale ICF laser systems

Bikmatov, R. G.; Boley, C. D.; Burdonsky, I. N.; Chernyak, V. M.; Федоров, А. В.; Goltsov, A.; Кондрашов, В. Н.; Koptyaev, S.; Kovalsky, N. G.; Кузнецов, В. Н.; Milam, D.; Murray, James E.; Pergament, M. I.; Petryakov, V. M.; Smirnov, R. V.; Соколов, В. И.; Zhuzhukalo, E. V.

doi:10.1117/12.354165

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Spatial Filter Design1

Introduction1

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“…A pinhole made of 0.2 mm thick tantalum foil is placed in the focal plane of the lenses. Relatively heavy tantalum ions due to their great inertia cannot close the pinhole during the 1 ns pulse [24]. The pinhole image was observed by CCD camera through a special vacuum window in the metal cell.…”

Section: Spatial Filter Designmentioning

confidence: 99%

Spatial filters for high-peak-power multistage laser amplifiers

Potemkin¹,

Barmashova²,

Kirsanov³

et al. 2007

Appl. Opt.

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We describe spatial filters used in a Nd:glass laser with an output pulse energy up to 300 J and a pulse duration of 1 ns. This laser is designed for pumping of a chirped-pulse optical parametric amplifier. We present data required to choose the shape and diameter of a spatial filter lens, taking into account aberrations caused by spherical surfaces. Calculation of the optimal pinhole diameter is presented. Design features of the spatial filters and the procedure of their alignment are discussed in detail.

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Section: Spatial Filter Designmentioning

confidence: 99%

Spatial filters for high-peak-power multistage laser amplifiers

Potemkin¹,

Barmashova²,

Kirsanov³

et al. 2007

Appl. Opt.

View full text Add to dashboard Cite

show abstract

“…For example, the induced plasma may approach to the pin-hole, deflect the laser beam into the incident system, and probably damage the optical devices in the system because of the high power density close to the pinhole. [16][17][18] A new design concept is necessary to reduce the size of the laser filter system, thus replacing the traditional large-size spatial filter in a high-power laser system.…”

Section: Introductionmentioning

confidence: 99%