“Cross type liquid crystal polarizing grating (PVG) two-dimensional dilated pupil optical waveguide has become a research hotspot in AR display due to its compact structure and convenient preparation. However, its field of view (FOV) for AR display is limited by the dual waveguide stacking technology scheme. To enhance the field of view of such waveguides, this paper proposes an optical waveguide architecture based on a single-layer high refractive index glass substrate (n=1.9) and integrating left-handed and right-handed chiral PVGs on both sides. Among them, the horizontal azimuth angles of the inverted lattice vectors of the left and right chiral gratings at the coupling in and coupling out ends are 0 ° and 60 °, respectively. The incident light is split into two total internal reflection paths through the polarization selectivity of PVG; When the coupling in and coupling out gratings provide a combined inverted lattice vector of 0 for light, they are partially coupled out and form a complete two-dimensional extended pupil. We derived the PVG grating period corresponding to the viewing angle center perpendicular to the waveguide based on the grating diffraction equation and glass refractive index, and verified the coupling mechanism of 532 nm collimated light vertically incident through COMSOL simulation. The prototype prepared for the experiment achieved an exit pupil grating size of 28 mm × 22 mm, with a field of view angle of 32.8 ° horizontally, 18.7 ° vertically, and 37.8 ° diagonally. The diagonal field of view angle increased by 26% compared to previous research. This design directly prepares PVG gratings on both sides of the substrate, eliminating traditional bonding processes and avoiding the strict selection requirements of refractive index matching adhesives and substrate materials. It significantly simplifies the preparation process and effectively reduces manufacturing costs. This scheme also significantly increases the FOV and improves the imaging quality by utilizing a high refractive index substrate, providing a promising high-performance solution for AR head mounted near eye displays. #Template # introduces its research progress in the field of AR display, and experts propose an optical waveguide architecture based on a single-layer high refractive index glass substrate to provide a solution for improving the field of view.”