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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 30, Iss. 9 — Mar. 20, 1991
  • pp: 1096–1112

Achromatic waveguide input/output coupler design

Kevin E. Spaulding and G. Michael Morris  »View Author Affiliations


Applied Optics, Vol. 30, Issue 9, pp. 1096-1112 (1991)
http://dx.doi.org/10.1364/AO.30.001096


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Abstract

An investigation into methods for achromatizing the coupling angle characteristics of waveguide input/output couplers is described. The basic approach involves correcting the inherent angular dispersion of conventional waveguide couplers with a diffraction grating. Two configurations are analyzed in detail: a hybrid prism/grating coupler and a double grating coupler. Expressions are derived for values of the grating parameters that produce achromatic coupling. A method is also presented to predict the achromatic wavelength range and maximize it with the available degrees of freedom. For a coupling angle tolerance of 0.005°, it is found that with double grating couplers achromatic wavelength ranges of the order of 10 nm can be obtained, and that with prism/grating couplers this range can be as large as 200 nm.

© 1991 Optical Society of America

History
Original Manuscript: January 23, 1990
Published: March 20, 1991

Citation
Kevin E. Spaulding and G. Michael Morris, "Achromatic waveguide input/output coupler design," Appl. Opt. 30, 1096-1112 (1991)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-30-9-1096

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