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Optica Publishing Group
  • Journal of the Optical Society of Korea
  • Vol. 6,
  • Issue 3,
  • pp. 117-120
  • (2002)

Polarization Insensitive Fiber-Optic Refractometer based on a Side-polished Fiber Coupler with a Thick Glass Waveguide

Open Access Open Access

Abstract

Side-polished single-mode fiber covered with a thick planar-glass-waveguide is studied as a polarization-insensitive fiber-optic refractometer The properties of the device are very sensitive to the index variation of an upper cladding on top of the overlay waveguide. We investigate the spectral response, the polarization properties, and the relationship between the shift in coupling wavelength and the index variation of an upper cladding layer Index resolutions of the order of 10-4 have been achieved.

© 2002 Optical Society of Korea

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