Title :
Multiplexed computer-generated waveguide hologram using gratings with different spatial frequencies
Author :
Li, Ming ; Kristjansson, Sigurgeir ; Eriksson, Niklas ; Larsson, A.
Author_Institution :
Dept. of Optoelectron. & Electr. Meas., Chalmers Univ. of Technol., Goteborg, Sweden
Abstract :
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.
Keywords :
computer-generated holography; electron beam lithography; holographic gratings; measurement errors; multiplexing; optical fabrication; optical waveguides; 10 percent; 55 percent; deflection angles; diffraction efficiency; electron-beam lithography; focal lengths; focused; holographic gratings; multiplexed computer-generated waveguide hologram; multiplexed off-plane computer-generated waveguide hologram; reactive ion beam etching; spatial frequencies; spot arrays; uniformity error; waveguide gratings; Arrayed waveguide gratings; Focusing; Frequency; Optical arrays; Optical diffraction; Optical filters; Optical refraction; Optical variables control; Optical waveguides; Pattern recognition;
Journal_Title :
Photonics Technology Letters, IEEE
