Combined blazed grating/Gires-Tournois resonator for liquid crystal beam switching

Boris Apter, Uzi Efron

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

A new concept of liquid crystal (LC) beam switching structure is introduced and analyzed. The main advantages of this device are its ability to perform triple-state beam switching, using a single uniform electrode as well as its reduced LC thickness, leading to a potentially fast response. The device is also aimed at overcoming the problems associated with the use of LC index mismatch in a hybrid surface-relief blazed grating. The configuration is based on an embedded blazed diffractive grating, composed of two optical substrates with different refractive indexes and a uniform-thickness LC layer, enclosed in a Gires-Tournois resonator. It is shown that this structure, which also removes the difficulty of LC alignment in hybrid blazed LC-glass structures, allows a dynamic switching of a laser beam with a diffraction efficiency exceeding 67%.

Original languageEnglish
Pages (from-to)962-968
Number of pages7
JournalJournal of Lightwave Technology
Volume24
Issue number2
DOIs
StatePublished - 1 Feb 2006

Keywords

  • Asymmetric Fabry-Pérot resonator
  • Beam switching
  • Diffraction
  • Gires-Tournois resonator
  • Liquid crystal (LC) devices
  • Optical switch

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