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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 21 — Oct. 8, 2012
  • pp: 23906–23911

Visible-band dispersion by a tapered air-core Bragg waveguide

B. Drobot, A. Melnyk, M. Zhang, T.W. Allen, and R.G. DeCorby  »View Author Affiliations

Optics Express, Vol. 20, Issue 21, pp. 23906-23911 (2012)

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We describe out-coupling of visible band light from a tapered hollow waveguide with TiO2/SiO2 Bragg cladding mirrors. The mirrors exhibit an omnidirectional band for TE-polarized modes in the ~490 to 570 nm wavelength range, resulting in near-vertical radiation at mode cutoff positions. Since cutoff is wavelength-dependent, white light is spatially dispersed by the taper. Resolution on the order of 2 nm is predicted and corroborated by experimental results. These tapers can potentially form the basis for compact micro-spectrometers in lab-on-a-chip and optofluidic micro-systems.

© 2012 OSA

OCIS Codes
(130.3120) Integrated optics : Integrated optics devices
(300.6190) Spectroscopy : Spectrometers

ToC Category:
Integrated Optics

Original Manuscript: July 31, 2012
Revised Manuscript: September 27, 2012
Manuscript Accepted: October 1, 2012
Published: October 3, 2012

B. Drobot, A. Melnyk, M. Zhang, T.W. Allen, and R.G. DeCorby, "Visible-band dispersion by a tapered air-core Bragg waveguide," Opt. Express 20, 23906-23911 (2012)

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