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Herzig, Hans-Peter
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Herzig, Hans-Peter
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- PublicationAccès libreInterferometric fabrication of modulated submicrometer gratings in photoresist(1995)
;Ehbets, Peter; ;Nussbaum, Philippe ;Blattner, Peter - PublicationAccès libreDiffractive optical elements for space communication terminals(1994)
; ;Ehbets, Peter ;Teijido, Juan M. ;Weible, Kenneth J.Heimbeck, Hans-JoergThe potential of diffractive optical elements for advanced laser communication terminals has been investigated. Applications include beam shaping of high- power laser diode arrays, optical filter elements for position detection and hybrid (refractive/diffractive) elements. In addition, we present a design example of a miniaturized terminal including diffractive optics. - PublicationAccès libreBeam Shaping of High-power Laser Diode Arrays by Continuous Surface-relief Elements(1993)
;Ehbets, Peter; ; ;Regnault, P.Kjelberg, I.A breadboard for beam shaping of high-power laser diode arrays (LDAs) has been realized. The coherent beams are added with the aid of a continuous surface-relief fan-in element. It results in a nearly symmetric single lobed beam of collimated light with maximum conversion efficiency. The theoretical efficiency is determined to be 96•7%. Experimentally, one third of the total power is now in the central peak. - PublicationAccès libreTIR holography analyzed with coupled wave theory(1992)
;Ehbets, Peter; A coupled wave model is presented to describe the diffraction behavior of thick total-internal reflection (TIR) holograms. We have transformed the coupled wave equations into a transfer matrix formalism, enabling a general treatment of the boundary conditions. The off-Bragg characteristics of TIR holograms is found to be completely different from normal volume holograms. The diffraction efficiency depends strongly on the phase of the total internal reflection and the optical pathlength through the hologram. High efficiency at the same angle as used for the recording requires careful control of all parameters. - PublicationAccès libreFan-out elements recorded as volume holograms: optimized recording conditions(1992)
; ;Ehbets, Peter ;Prongué, Damien