Recording of the Multiplexed Bragg Diffraction Gratings for Waveguides Using Phase Mask

Abstract

The paper describes a stable method for multiplexed recording of the Bragg diffraction gratings for waveguides using a phase mask. Diffraction waveguides in this experiment were made of photo-thermo-refractive glass. Two types of the phase mask are considered: surface and volume. Their comparison is based on diffraction characteristics of manufactured single and multiplexed Bragg gratings. The experimental results showed the advantage of surface phase mask application. To confirm the efficiency of the proposed method, diffraction waveguides was successfully fabricated and integrated in see-through near-eye display.

Keywords

• diffraction gratings
• Bragg gratings
• holographic lithography
• phase mask
• holographic replication
• diffraction waveguides