CPC G02B 6/12011 (2013.01) [G02B 2006/12164 (2013.01)] | 5 Claims |
1. A super-compact arrayed waveguide grating (AWG) wavelength division multiplexer based on a sub-wavelength grating, comprising an input waveguide, a first planar waveguide, a sub-wavelength grating arrayed waveguide, a second planar waveguide, and an output waveguide, wherein the input waveguide, the first planar waveguide, the sub-wavelength grating arrayed waveguide, the second planar waveguide, and the output waveguide are silicon-based devices and sequentially connected;
the input waveguide has 1 port, and the output waveguide has 8 ports;
the sub-wavelength grating arrayed waveguide comprises 50 strip sub-wavelength gratings with a same length difference ΔL; each of the 50 strip sub-wavelength gratings is configured as an equivalent uniform waveguide;
the first planar waveguide and the second planar waveguide each have a basic structure of a Rowland circle, wherein the Rowland circle comprises a circle with a radius of R and an inscribed circle with a radius of R/2, and the first and second planar waveguides are symmetrically designed.
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