Abstract: In one embodiment, an integrated circuit device includes a substrate, an electronic integrated circuit (EIC), a photonics integrated circuit (PIC) electrically coupled to the EIC, and a glass block at least partially in a cavity defined by the substrate and at an end of the substrate. The glass block defines an optical path with one or more optical elements to direct light between the PIC and a fiber array unit (FAU) when attached to the glass block.

Abstract: Technologies for beam expansion in glass substrates are disclosed. In the illustrative embodiment, light in a waveguide defined in a glass substrate is allowed to expand towards a curved mirror defined in the glass substrate. The light is collimated to a beam as it is reflected off the mirror. In the illustrative embodiment, the light is reflected upwards toward the top surface of the glass substrate. A photonic integrated circuit (PIC) die may be mounted on the glass substrate. A micromirror lens fixed to the PIC die can focus the collimated beam into a waveguide defined in the PIC die. In some embodiments, an interface for an optical connector may be formed in the glass substrate, allowing the optical connector to be removably plugged into the glass substrate.

Abstract: Technologies for beam expansion for vertically-emitting photonic integrated circuits are disclosed. In the illustrative embodiment, waveguides in a photonic integrated circuit (PIC) die guide light to vertical couplers, which direct the light from the waveguides out of the top surface of the PIC die. A glass microoptic substrate is mounted on the top surface of the PIC die, positioned over the vertical couplers. A mirror in the glass microoptic substrate reflects the light from the vertical couplers to propagate in a direction parallel to the top surface of the PIC die. Another set of mirrors in the glass microoptic substrate focus the light from each waveguide into a collimated beam directed out of the top surface of the glass microoptic substrate.

Abstract: A photonic device, an integrated circuit device assembly including the photonic device, and a method of fabricating the photonic device. The device includes: a substrate; photonic circuitry on the substrate; an optical waveguide structure on the substrate; an optical coupler coupled to the photonic circuitry at one end thereof by way of the optical waveguide structure, and having a terminus at another end thereof to output an optical beam; and a metalens structure on the substrate, the metalens structure including a plurality of vertical nanostructures to configure an optical path between the optical coupler and an optical interface component that is to be optically coupled to the photonic device.

Abstract: An optical apparatus (10) for routing an optical signal (12) comprises a body (14) comprising a material. A waveguide (16) is formed in the body (14) by laser modification of the material. The optical apparatus (10) further comprises a region (18) comprising a lower refractive index than the material of the body (14) and defines an interface (24) between the region (18) and the waveguide (16). The waveguide (16) and the interface (24) are aligned relative to each other for routing the optical signal (12) therebetween and reflecting the optical signal (12) at the interface (24).

Abstract: Optical apparatus and methods of manufacture thereof An optical apparatus (20) for evanescently coupling an optical signal across an (interface (30) is described. The optical apparatus (20) comprises a first substrate (22) and a second substrate (24). The optical signal is evanescently coupled between a first waveguide (26) formed by laser inscription of the first substrate (22) and a second waveguide (28) of the second substrate (22). The first waveguide (26) comprises a curved section (34) configured to provide evanescent coupling of the optical signal between the first and second waveguides (26, 28) via the interface (30).

Abstract: A method of forming an optical device in a body (32), comprises performing a plurality of laser scans (34,36) to form the optical device, each scan comprising relative movement of a laser beam and the body thereby to scan the laser beam along a respective path (34a, 34b 34f; 36a, 36b 36f) through the body to alter the refractive index of material of that path, wherein the paths are arranged to provide in combination a route for propagation of light through the optical device in operation that is larger in a direction substantially perpendicular to the route for propagation of light than any one of the paths individually.

Abstract: Optical apparatus comprises: a body comprising material; a plurality of optical elements formed of the material of the body; and a plurality of alignment holes formed in the material of the body, wherein: the alignment holes comprise fibre or other waveguide alignment holes aligned with one or more of the optical elements, and/or the alignment holes comprise alignment holes configured to receive mechanical elements for fixing and/or aligning the body to at least one further body.

Abstract: Optical apparatus and methods of manufacture thereof An optical apparatus (20) for evanescently coupling an optical signal across an (interface (30) is described. The optical apparatus (20) comprises a first substrate (22) and a second substrate (24). The optical signal is evanescently coupled between a first waveguide (26) formed by laser inscription of the first substrate (22) and a second waveguide (28) of the second substrate (22). The first waveguide (26) comprises a curved section (34) configured to provide evanescent coupling of the optical signal between the first and second waveguides (26, 28) via the interface (30).

Abstract: An optical apparatus (10) for routing an optical signal (12) comprises a body (14) comprising a material. A waveguide (16) is formed in the body (14) by laser modification of the material. The optical apparatus (10) further comprises a region (18) comprising a lower refractive index than the material of the body (14) and defines an interface (24) between the region (18) and the waveguide (16). The waveguide (16) and the interface (24) are aligned relative to each other for routing the optical signal (12) therebetween and reflecting the optical signal (12) at the interface (24).

Abstract: An optical apparatus 20 for evanescently coupling an optical signal across an interface 30 is described. The optical apparatus 20 comprises a first substrate 22 and a second substrate 24. The optical signal is evanescently coupled between a first waveguide 26 formed by laser inscription of the first substrate 22 and a second waveguide 28 of the second substrate 22. The first waveguide 26 comprises a curved section 34 configured to provide evanescent coupling of the optical signal between the first and second waveguides 26, 28 via the interface 30.

Abstract: A method of forming an optical device in a body (32), comprises performing a plurality of laser scans (34,36) to form the optical device, each scan comprising relative movement of a laser beam and the body thereby to scan the laser beam along a respective path (34a, 34b 34f; 36a, 36b 36f) through the body to alter the refractive index of material of that path, wherein the paths are arranged to provide in combination a route for propagation of light through the optical device in operation that is larger in a direction substantially perpendicular to the route for propagation of light than any one of the paths individually.

Abstract: A method of forming an optical device in a body (32), comprises performing a plurality of laser scans (34,36) to form the optical device, each scan comprising relative movement of a laser beam and the body thereby to scan the laser beam along a respective path (34a, 34b 34f; 36a, 36b 36f) through the body to alter the refractive index of material of that path, wherein the paths are arranged to provide in combination a route for propagation of light through the optical device in operation that is larger in a direction substantially perpendicular to the route for propagation of light than any one of the paths individually.

Abstract: An optical apparatus 20 for evanescently coupling an optical signal across an interface 30 is described. The optical apparatus 20 comprises a first substrate 22 and a second substrate 24. The optical signal is evanescently coupled between a first waveguide 26 formed by laser inscription of the first substrate 22 and a second waveguide 28 of the second substrate 22. The first waveguide 26 comprises a curved section 34 configured to provide evanescent coupling of the optical signal between the first and second waveguides 26, 28 via the interface 30.

Abstract: A method of forming an optical device in a body (32), comprises performing a plurality of laser scans (34,36) to form the optical device, each scan comprising relative movement of a laser beam and the body thereby to scan the laser beam along a respective path (34a, 34b 34f; 36a, 36b 36f) through the body to alter the refractive index of material of that path, wherein the paths are arranged to provide in combination a route for propagation of light through the optical device in operation that is larger in a direction substantially perpendicular to the route for propagation of light than any one of the paths individually.