Optical properties of dual-core hollow waveguides

Christopher D. Rabii, James A. Harrington

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


A new type of hollow glass waveguide has been fabricated that transmits radiation from visible to infrared wavelengths with low loss. The broadband transmission is achieved with a structure consisting of two distinct core regions; a silica annulus for transmission of wavelengths from 0.3 to 2.0 μm and a hollow core for transmission from 2.0 to 12.0 μm. Losses in the silica core at 633 nm are 0.3 dB/m. Losses in the 575-μm bore hollow core at 10.6 mm are 0.6 dB/m. Bending loss is negligible for radiation transmitted in the solid silica core, whereas the hollow guide loss exhibits a 1/R dependence. The dual-core waveguide can transmit broadband radiation, is rugged and flexible, and therefore, is a good candidate for medical or sensor applications.

Original languageEnglish (US)
Pages (from-to)6249-6252
Number of pages4
JournalApplied Optics
Issue number31
StatePublished - Nov 1 1996

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering


  • CO laser
  • Er:YAG laser
  • Hollow waveguide
  • Infrared fibers


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