Practical Design Methods For Holographic Construction Of Waveguide Focusing Grating Couplers

George N. Lawrence; Patrick J. Cronkite

doi:10.1117/12.951468

25 May 1989 Practical Design Methods For Holographic Construction Of Waveguide Focusing Grating Couplers

George N. Lawrence, Patrick J. Cronkite

Proceedings Volume 1051, Practical Holography III; (1989) https://doi.org/10.1117/12.951468
Event: OE/LASE '89, 1989, Los Angeles, CA, United States

Abstract

Waveguide grating couplers have been actively investigated for several years for application as read-out heads for optical data storage. Fabrication by optical holography has generally been considered to be very difficult because the grating is used in the near infrared but must be made at blue-green wavelengths where good holographic materials are suitable. As is typical of all gratings, operation at a wavelength different from the construction wavelength causes severe aberrations. While, in principal, the aberrations may be precompensated by special fabrication optics, the design and construction of such systems is extremely difficult because of the unusual aberrations and the lack of rotational symmetry in the construction optics. The highly unusual aspects of the waveguide grating make conventional optical design difficult. In this paper we show a simple configurations which is rotationally symmetrical and relatively easy to fabricate. In addition, the design may be readily done on a conventional lens design program without modifications.

Citation Download Citation

George N. Lawrence and Patrick J. Cronkite "Practical Design Methods For Holographic Construction Of Waveguide Focusing Grating Couplers", Proc. SPIE 1051, Practical Holography III, (25 May 1989); https://doi.org/10.1117/12.951468

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