US 11,860,411 B2
Super-compact arrayed waveguide grating (AWG) wavelength division multiplexer based on sub-wavelength grating
Xihua Zou, Chengdu (CN); Changjian Xie, Chengdu (CN); Xiaojun Xie, Chengdu (CN); Wei Pan, Chengdu (CN); and Lianshan Yan, Chengdu (CN)
Assigned to Southwest Jiaotong University, Chengdu (CN)
Filed by Southwest Jiaotong University, Chengdu (CN)
Filed on Nov. 4, 2022, as Appl. No. 17/980,607.
Claims priority of application No. 202210247517.5 (CN), filed on Mar. 14, 2022.
Prior Publication US 2023/0288636 A1, Sep. 14, 2023
Int. Cl. G02B 6/12 (2006.01)
CPC G02B 6/12011 (2013.01) [G02B 2006/12164 (2013.01)] 5 Claims
OG exemplary drawing
 
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.