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Optica Publishing Group
  • Applied Spectroscopy
  • Vol. 46,
  • Issue 9,
  • pp. 1437-1441
  • (1992)

Corning 7059, Silicon Oxynitride, and Silicon Dioxide Thin-Film Integrated Optical Waveguides: In Search of Low Loss, Nonfluorescent, Reusable Glass Waveguides

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Abstract

The care and cleanliness with which optical fibers are drawn and cured produces nearly defect-free waveguides with propagation losses measured in decibels per kilometer (dB/km). The efficiency of light propagation, combined with the mechanical flexibility and ease of optical coupling, makes multimode optical fibers attractive for many remote spectroscopic and sensing applications. Ultraviolet (UV) grade quartz (a very pure form of silica) is used to produce UV transmitting fibers with minimal background fluorescence, making them an excellent choice for low-level detection. For example, Ciba Corning has reported a quartz fiber-optic immunosensor with a picomolar detection limit that is the lowest reported to date for an affinity-based optical sensor.

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