Interposer assemblies and arrangements for coupling at least one optical fiber to at least one optoelectronic device

A method to manufacture an arrangement for coupling at least one optical fiber to at least one optoelectronic device, comprising:

• providing a first wafer comprising a plurality of the interposers each comprising at least one optical waveguide, and at least one first fiducial, wherein:
• the at least one optical waveguide of each of the plurality of the interposers is configured to select a first one of polarizations of light coupled in the at least one optical waveguide at a first end such that the light coupled out at a second end of the optical waveguide has the first polarization and/or to select a second one of the polarizations of the light coupled in the at least one optical waveguide at the second end such that the light coupled out at the first end of the at least one optical waveguide has the second polarization being different from the first polarization, and
• the at least one optical waveguide of each of the plurality of interposers comprises a cross-section that is changed along the longitudinal direction of the at least one optical waveguide such that the first polarization of the polarizations of the light coupled in the at least one optical waveguide at the first end is selected such that the light coupled out at the second end of the at least one optical waveguide has the first polarization and/or the second polarization of the polarizations of the light coupled in the at least one optical waveguide at the second end is selected such that the light coupled out at the first end of the at least one optical waveguide has the second polarization;
• providing a second wafer comprising a plurality of the substrates and at least one second fiducial;
• aligning the first wafer and the second wafer by means of the at least one first fiducial and the at least one second fiducial such that a respective one of the plurality of interposers of the first wafer and a respective one of the plurality of substrates of the second wafer are arranged so that light coupled out of the at least one optical waveguide of the respective one of the plurality of interposers at the second end of the at least one optical waveguide is coupled to at least one optical receiving/emitting structure of the respective one of the plurality of substrates and/or light coupled out of the at least one optical receiving/emitting element of the respective one of the plurality of substrates is coupled in the at least one optical waveguide of the respective one of the plurality of interposers at the second end of the at least one optical waveguide, wherein the at least one optical receiving/emitting element is configured to receive/emit light having the first polarization with a lower loss than light having the second polarization of the respective one of the plurality of substrates;
• singularizing a pair of the respective one of the plurality of interposers and the respective one of the plurality of substrates to provide the arrangement.

An interposer assembly, comprising:

• an interposer comprising at least one optical waveguide having a first end and a second end;
• a substrate being in optical communication with the interposer, the substrate comprising at least one optoelectronic device, at least one optical receiving/emitting element and at least one optical channel comprising a first end in optical communication with the at least one optical receiving/emitting element and a second end in optical communication with the at least one optoelectronic device;
• wherein:
• a cross-section of the at least one optical waveguide of the interposer changes along a longitudinal direction of the at least one optical waveguide such that the first end has a first polarization of light and the second end has a second polarization of light;
• the at least one optical receiving/emitting element comprises a first optical receiving/emitting element configured to receive/emit light having the first polarization, and a second optical receiving/emitting element to be configured to receive/emit light having the second polarization, wherein the first polarization provides a lower loss of light than the second polarization;
• wherein the at least one optical waveguide of the interposer comprises a first section, a second section, a third section and a third end;
• a splitting node at which the first section is split into the second section and third section, wherein the first section of the at least one optical waveguide extends within the interposer from the first end of the at least one optical waveguide to the splitting node;
• wherein the second section of the at least one optical waveguide extends within the interposer from the splitting node to the second end of the at least one waveguide;
• and
• wherein the third section of the at least one optical waveguide extends within the interposer from the splitting node to the third end of the at least one optical waveguide.