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Applied Optics

Applied Optics


  • Vol. 41, Iss. 15 — May. 20, 2002
  • pp: 2818–2825

Input waveguide grating couplers designed for a desired wavelength and polarization response

Johan Backlund, Jörgen Bengtsson, Carl-Fredrik Carlström, and Anders Larsson  »View Author Affiliations

Applied Optics, Vol. 41, Issue 15, pp. 2818-2825 (2002)

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Input grating couplers are used to couple light from free space into a waveguide and can provide additional functions such as focusing and beam splitting of the light into arbitrary desired positions in the waveguide. We show that it is possible to design the couplers so that they perform different desired functions depending on the polarization or wavelength of the incident light. We demonstrate experimentally a number of couplers that may be of interest, e.g., in optical fiber communications. Examples are polarization-independent couplers, designed to have the same response for two orthogonal polarizations of the incident light, and couplers for demultiplexing in wavelength division multiplexing applications, designed to separate and focus different input wavelengths to different positions in the waveguide.

© 2002 Optical Society of America

OCIS Codes
(050.1970) Diffraction and gratings : Diffractive optics
(060.1810) Fiber optics and optical communications : Buffers, couplers, routers, switches, and multiplexers
(130.3120) Integrated optics : Integrated optics devices

Original Manuscript: May 3, 2001
Revised Manuscript: November 14, 2001
Published: May 20, 2002

Johan Backlund, Jörgen Bengtsson, Carl-Fredrik Carlström, and Anders Larsson, "Input waveguide grating couplers designed for a desired wavelength and polarization response," Appl. Opt. 41, 2818-2825 (2002)

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