Grating coupled interferometry for optical sensing

Peter Kozma, Andras Hamori, Kaspar Cottier, Sandor Kurunczi, R. Horváth

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

An interferometric sensor based on gratings on a planar waveguide is introduced. The device combines the advantages of known interference-based waveguide sensors with the simplicity of grating couplers. In the presented configuration, two parallel and coherent light beams, laterally separated in the direction of mode propagation, are coupled into a planar waveguide through a grating. One of the coupled beams is phase modulated using a periodically relaxing liquid crystal modulator, resulting in a time varying intensity signal at the end face of the waveguide. Refractive index changes within the waveguide section between the two coupling regions are monitored by observing characteristic changes in the intensity signal.

Original languageEnglish
Pages (from-to)5-8
Number of pages4
JournalApplied Physics B: Lasers and Optics
Volume97
Issue number1
DOIs
Publication statusPublished - Sep 2009

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interferometry
gratings
waveguides
propagation modes
sensors
coherent light
light beams
couplers
modulators
liquid crystals
refractivity
interference
configurations

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physics and Astronomy (miscellaneous)

Cite this

Grating coupled interferometry for optical sensing. / Kozma, Peter; Hamori, Andras; Cottier, Kaspar; Kurunczi, Sandor; Horváth, R.

In: Applied Physics B: Lasers and Optics, Vol. 97, No. 1, 09.2009, p. 5-8.

Research output: Contribution to journalArticle

Kozma, Peter ; Hamori, Andras ; Cottier, Kaspar ; Kurunczi, Sandor ; Horváth, R. / Grating coupled interferometry for optical sensing. In: Applied Physics B: Lasers and Optics. 2009 ; Vol. 97, No. 1. pp. 5-8.
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