Multiplexed computer-generated waveguide hologram using gratings with different spatial frequencies

We propose and experimentally demonstrate a multiplexed off-plane computer-generated waveguide hologram, using waveguide gratings with different spatial frequencies. Two spot arrays are produced at different deflection angles and simultaneously focused at different focal lengths above the waveguide....

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Bibliographic Details
Published in:IEEE photonics technology letters 1996-12, Vol.8 (12), p.1653-1655
Main Authors: Ming Li, Kristjansson, S., Eriksson, N., Larsson, A.
Format: Article
Language:English
Subjects:
Arrayed waveguide gratings
Focusing
Frequency
Optical arrays
Optical diffraction
Optical filters
Optical refraction
Optical variables control
Optical waveguides
Pattern recognition
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Summary:We propose and experimentally demonstrate a multiplexed off-plane computer-generated waveguide hologram, using waveguide gratings with different spatial frequencies. Two spot arrays are produced at different deflection angles and simultaneously focused at different focal lengths above the waveguide. Electron-beam lithography and reactive ion beam etching were used in fabricating this device. The uniformity error and the diffraction efficiency were measured to be approximately 10% and 55%, respectively.
ISSN:1041-1135
1941-0174
DOI:10.1109/68.544708