US 12,345,917 B2
Optical integrated circuit
Jeroen Antonius Maria Duis, Enschede (NL); and Johannes Cornelis Van Kerkhof, Enschede (NL)
Assigned to PHIX B.V., Enschede (NL)
Appl. No. 18/292,541
Filed by PHIX B.V., Enschede (NL)
PCT Filed Jul. 28, 2022, PCT No. PCT/NL2022/050450
§ 371(c)(1), (2) Date Jan. 26, 2024,
PCT Pub. No. WO2023/009005, PCT Pub. Date Feb. 2, 2023.
Claims priority of application No. 2028885 (NL), filed on Jul. 29, 2021.
Prior Publication US 2024/0264373 A1, Aug. 8, 2024
Int. Cl. G02B 6/122 (2006.01); G02B 6/12 (2006.01); G02B 6/13 (2006.01)
CPC G02B 6/122 (2013.01) [G02B 6/13 (2013.01); G02B 2006/12102 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An optical integrated circuit, comprising:
a substrate,
at least one open cavity provided in said substrate,
at least one set of optical waveguides for each open cavity, each set comprising a first optical waveguide and a second optical waveguide, wherein the first optical waveguide and the second optical waveguide of a set are each arranged in the substrate and each comprise a first end facet ending in the open cavity of that set,
a first collimating element for each set, the first collimating element of a set being arranged in the open cavity of that set at or near the first end facet of the first optical waveguide of that set to collimate light from that first optical waveguide, and
a second collimating element for each set, the second collimating element of a set being arranged in the open cavity of that set at or near the first end facet of the second optical waveguide of that set to collimate light into that second optical waveguide,
wherein the first optical waveguide and the second optical waveguide of a set are different segments of an optical waveguide that is interrupted by the open cavity of that set, and
wherein the first and second collimating elements are made of polymerized and cured photo-sensitive material having a first refractive index,
further comprising arranged in the cavity cured but not polymerized material, having a second refractive index different from the first refractive index and acting as a mechanical support for supporting the first and second collimating elements; further comprising a binding material in a recess to secure an optical component between the first and second collimating elements.