US 9,810,841 B2
Silicon photonic device, optical polarisation beam coupler and optical waveguide coupler
Wei-Ping Huang, Stockholm (SE); Mats Johansson, Stockholm (SE); Stephane Lessard, Montreal (CA); and Francesco Testa, Pisa (IT)
Assigned to Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Appl. No. 15/324,550
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Jul. 8, 2014, PCT No. PCT/EP2014/064549
§ 371(c)(1), (2) Date Jan. 6, 2017,
PCT Pub. No. WO2016/004982, PCT Pub. Date Jan. 14, 2016.
Prior Publication US 2017/0168236 A1, Jun. 15, 2017
Int. Cl. G02B 6/00 (2006.01); G02B 6/126 (2006.01); G02B 6/125 (2006.01); G02B 6/12 (2006.01); G02B 6/124 (2006.01); G02B 6/122 (2006.01); G02B 6/27 (2006.01); G02B 6/02 (2006.01); G02B 6/42 (2006.01)
CPC G02B 6/126 (2013.01) [G02B 6/02285 (2013.01); G02B 6/12002 (2013.01); G02B 6/124 (2013.01); G02B 6/125 (2013.01); G02B 6/1228 (2013.01); G02B 6/2726 (2013.01); G02B 6/2773 (2013.01); G02B 6/4213 (2013.01); G02B 2006/12061 (2013.01); G02B 2006/12121 (2013.01); G02B 2006/12135 (2013.01); G02B 2006/12147 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A silicon photonic device comprising:
a silicon core having a core refractive index; and
a structure formed in the silicon core, the structure comprising:
a first refractive index variation pattern extending across the core in a first direction, the first refractive index variation pattern having a first modulation depth; and
a second refractive index variation pattern extending across the core in a second direction, substantially orthogonal to the first direction, the second refractive index variation pattern having a second modulation depth, less than the first modulation depth,
wherein the first refractive index variation pattern overlays the second refractive index variation pattern, thereby forming a three-dimensional structure, and
wherein the first refractive index variation pattern only supports propagation of light having a transverse magnetic mode between the first direction and a third direction, substantially orthogonal to the first direction and the second direction, and the second refractive index variation pattern only supports propagation of light having a transverse electric mode between the second direction and the third direction.