US 12,449,598 B2
Waveguide antenna device
Daniele Melati, Ottawa (CA); Dan-Xia Xu, Ottawa (CA); Pavel Cheben, Ottawa (CA); Jens H. Schmid, Ottawa (CA); Mohsen Kamandar-Dezfouli, Ottawa (CA); Yuri Grinberg, Ottawa (CA); Ross Cheriton, Ottawa (CA); Siegfried Janz, Ottawa (CA); Winnie N. Ye, Ottawa (CA); and Shahrzad Khajavi, Ottawa (CA)
Assigned to NATIONAL RESEARCH COUNCIL OF CANADA, Ottawa (CA); and CARLETON UNIVERSITY, Ottawa (CA)
Appl. No. 18/005,483
Filed by NATIONAL RESEARCH COUNCIL OF CANADA, Ottawa (CA); and CARLETON UNIVERSITY, Ottawa (CA)
PCT Filed Jul. 14, 2021, PCT No. PCT/IB2021/056354
§ 371(c)(1), (2) Date Jan. 13, 2023,
PCT Pub. No. WO2022/013780, PCT Pub. Date Jan. 20, 2022.
Claims priority of provisional application 63/051,427, filed on Jul. 14, 2020.
Prior Publication US 2023/0258865 A1, Aug. 17, 2023
Int. Cl. G02B 6/124 (2006.01); G02B 6/34 (2006.01)
CPC G02B 6/124 (2013.01) [G02B 6/34 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An antenna device for performing off-chip light coupling in and out of optical waveguides, comprising an array of radiating elements arranged in a plane, each radiating element having a pair of un etched core segments and etched gaps, spaced apart according to a pitch for diffracting light off said plane; wherein the number of radiating elements is chosen such that the length of the array is less than 10λ, where Δ is the wavelength of light in the core material segments.