US 12,265,259 B2
Waveguide mode coupling
Abraham Israel, Jerusalem (IL); and Hesham Taha, Jerusalem (IL)
Assigned to Teramount Ltd., Jerusalem (IL)
Filed by Teramount Ltd., Jerusalem (IL)
Filed on Mar. 10, 2020, as Appl. No. 16/814,401.
Claims priority of provisional application 62/795,837, filed on Jan. 23, 2019.
Prior Publication US 2021/0003777 A1, Jan. 7, 2021
Int. Cl. G02B 6/122 (2006.01); G02B 6/14 (2006.01); G02B 6/12 (2006.01)
CPC G02B 6/14 (2013.01) [G02B 6/1228 (2013.01); G02B 2006/12061 (2013.01)] 23 Claims
OG exemplary drawing
 
1. An apparatus, comprising:
a first optical waveguide; and
a second optical waveguide disposed partially within the first optical waveguide comprising:
a first portion having a first cross-section, in a first plan view, having a first about trapezoidal configuration and a second cross-section, substantially orthogonal to the first cross-section in a second plan view, having a second about trapezoidal configuration,
wherein the apparatus is configured to expand an optical signal propagating from the second optical waveguide to the first optical waveguide.