Diffractive coherence in multilayer dielectric gratings

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Successful operation of large-scale high-power lasers, such as those in use and planned at LLNL and elsewhere, require optical elements that can withstand extremely high fluences without suffering damage. Of particular concern are dielectric diffraction gratings used for beam sampling and pulse compression. Laser induced damage to bulk dielectric material originates with coupling of the electric field of the radiation to bound electrons, proceeding through a succession of mechanisms that couple the electron kinetic energy to lattice energy and ultimately to macroscopic structural changes (e.g. melting). The constructive interference that is responsible for the diffractive behavior of a grating or ... continued below

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15 p.

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Shore, B.W.; Feit, M.D.; Perry, M.D.; Boyd, R.D.; Britten, J.A. & Li, Lifeng May 26, 1995.

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Description

Successful operation of large-scale high-power lasers, such as those in use and planned at LLNL and elsewhere, require optical elements that can withstand extremely high fluences without suffering damage. Of particular concern are dielectric diffraction gratings used for beam sampling and pulse compression. Laser induced damage to bulk dielectric material originates with coupling of the electric field of the radiation to bound electrons, proceeding through a succession of mechanisms that couple the electron kinetic energy to lattice energy and ultimately to macroscopic structural changes (e.g. melting). The constructive interference that is responsible for the diffractive behavior of a grating or the reflective properties of a multilayer dielectric stack can enhance the electric field above values that would occur in unstructured homogeneous material. Much work has been done to model damage to bulk matter. The presence of nonuniform electric fields, resulting from diffractive coherence, has the potential to affect damage thresholds and requires more elaborate theory. We shall discuss aspects of work directed towards understanding the influence of dielectric structures upon damage, with particular emphasis on computations and interpretation of electric fields within dielectric gratings and multilayer dielectric stacks, noting particularly the interference effects that occur in these structures.

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15 p.

Notes

OSTI as DE95016611

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  • 7. Rochester conference on coherence and quantum optics, Rochester, NY (United States), 7-10 Jun 1995

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  • Other: DE95016611
  • Report No.: UCRL-JC--120189
  • Report No.: CONF-9506238--1
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 106436
  • Archival Resource Key: ark:/67531/metadc619786

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  • May 26, 1995

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  • June 16, 2015, 7:43 a.m.

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  • Feb. 16, 2016, 6:26 p.m.

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Shore, B.W.; Feit, M.D.; Perry, M.D.; Boyd, R.D.; Britten, J.A. & Li, Lifeng. Diffractive coherence in multilayer dielectric gratings, article, May 26, 1995; California. (digital.library.unt.edu/ark:/67531/metadc619786/: accessed September 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.