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Optics Letters

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  • Vol. 27, Iss. 15 — Aug. 1, 2002
  • pp: 1288–1290

Resonant Brewster filters with absentee layers

D. Shin, Z. S. Liu, and R. Magnusson  »View Author Affiliations


Optics Letters, Vol. 27, Issue 15, pp. 1288-1290 (2002)
http://dx.doi.org/10.1364/OL.27.001288


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Abstract

A method for lowering the sideband levels associated with the spectral response of resonant waveguide-grating filters is presented. With a TM-polarized incident wave near the Brewster angle, the filter sidebands are suppressed by application of a half-wavelength absentee waveguide layer and an arbitrary-thickness grating layer. Adjusting the thickness of the grating layer permits control of the filter linewidth without appreciably affecting the sideband features. To verify the theoretical prediction, we fabricated and tested a double-layer waveguide-grating filter. It exhibited a peak efficiency of 82.4%, with sideband reflection levels below 0.6%, over a 95-nm spectral range.

© 2002 Optical Society of America

OCIS Codes
(050.1970) Diffraction and gratings : Diffractive optics
(260.5740) Physical optics : Resonance
(310.0310) Thin films : Thin films
(310.2790) Thin films : Guided waves

Citation
D. Shin, Z. S. Liu, and R. Magnusson, "Resonant Brewster filters with absentee layers," Opt. Lett. 27, 1288-1290 (2002)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-27-15-1288


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