An optical system includes a substrate and, being formed on the substrate, a reflective structure including a first inner reflection face with a parabolic profile, a second inner planar reflection face and a third inner planar reflection face, a photoelectric transducer including an active region configured to emit light waves or configured to receive light waves and positioned in the reflective structure, at a part of the foci, the material of the reflective structure being chosen to be transparent to the light waves, a waveguide arranged so that its longitudinal axis is parallel to the optical axes and its proximal end is adjoining the reflective structure between the second and third reflection faces and at the active region.

There is described an optical coupler having a plurality of waveguides arranged in a plurality of cladding layers, each cladding layer having at least one waveguide. One or more of the vertical distances between waveguides in adjacent cladding layers and transverse distances between waveguides in the same cladding layer may be configured to perform one or more of mode matching with an external light source, maintaining optical coupling between the plurality of waveguides, and ensuring optical efficiency of the optical coupler.

A method for manufacturing a grating, a grating manufactured by the method, and an optical waveguide including the grating are provided. The method includes the following. A substrate is provided. A mask layer is formed on a surface of the substrate according to a target pattern structure of the grating, where the mask layer has a pattern structure complementary to the target pattern structure, and the pattern structure includes multiple protrusions and multiple recessed regions. A grating is formed by depositing a semiconductor material on the surface of the substrate. The semiconductor material is deposited in the multiple recessed regions of the pattern structure of the mask layer to form the target pattern structure. The mask layer is removed by lift-off. The method provided herein is simple in process and can enhance production efficiency. The manufactured grating has a relatively high refractive index and can reduce light scattering.

An electro-holographic light field generator device comprises surface acoustic wave (SAW) optical modulators arranged in different directions. Specifically, some embodiments have SAW modulators arranged in pairs, nose-to-nose with each other, and have output couplers that provide face-fire light emission. These SAW modulators also possibly include SAW sense transducers and/or viscoelastic surface material to reduce crosstalk.

Aspects of the present application provide an optical device comprising a suspended optical component over a cavity, such as an undercut region in a substrate. The cavity is filled with a filler material. In some embodiments, the optical device and a method may be provided to fill the cavity with the filler material using a reservoir and a channel in the substrate connecting the reservoir to the cavity to be filled.

A method of manufacturing an electro-optically active device. The method comprising the steps of: etching a cavity on a silicon-on-insulator wafer; providing a sacrificial layer adjacent to a substrate of a lll-V semiconductor wafer; epitaxially growing an electro-optically active structure on the lll-V semiconductor wafer; etching the epitaxially grown optically active structure into an electro-optically active mesa; disposing the electro-optically active mesa in the cavity of the silicon-on-insulator wafer and bonding a surface of the electro-optically active mesa, which is distal to the sacrificial layer, to a bed of the cavity; and removing the sacrificial layer between the substrate of the lll-V semiconductor wafer and the electro-optically active mesa.

Provided is an optical waveguide device including an optical waveguide, and a spot size converter connected to the optical waveguide, in which a propagation loss is further suppressed even in a case where an insulating layer covering the optical waveguide is disposed. An optical waveguide device includes an optical waveguide 2 formed on a substrate 1, and a spot size converter SSC that changes a mode field diameter of a light wave propagating through the optical waveguide in at least one end of the optical waveguide 2, in which an insulating layer IL that covers at least an upper surface of the optical waveguide is provided, and the insulating layer IL is continuously disposed to the spot size converter SSC along the optical waveguide.

A guide transition device including a light source designed to generate a light beam, a light input port on a first plane and coupled to receive the light beam from the light source, a light output port on a second plane different than the first plane, the light output port designed to couple a received light beam to output equipment and plane shifting apparatus coupled to receive the light beam from the light input port on the first plane and to shift or transfer the light beam to the second plane. The plane shifting apparatus is coupled to transfer the light beam to the light output port on the second plane.

The visual detection of a silicon optical circuit in a conventional technique depends on sensory decision by a human who visually conducts checking, and there has been limitation in completely detecting small flaws. The optical circuit of the present invention includes, in addition to an optical circuit that implements desired functions, an optical waveguide for flaw detection which surrounds the entire optical circuit and which is sufficiently proximate to the optical waveguide of the optical circuit and grating couplers connected to the optical waveguide for detection. Based on the transmission characteristic measurement of the optical waveguide for detection using the grating couplers, a flaw within each chip can be efficiently discovered in the state of a wafer before being cut into chips. A flaw can also be discovered hierarchically by providing individual optical waveguides for detection for respective chips and by further forming one common optical waveguide for detection over the plurality of chips.

An optical circuit module comprises a substrate with a first optical coupler connected to a first optical waveguide and a second optical coupler connected to a second optical waveguide on a substrate surface side; and a semiconductor photonic device mounted on the substrate, wherein the semiconductor photonic device has a third optical waveguide and a fourth optical waveguide extending to a first end face that faces the substrate surface, and wherein the third optical waveguide is optically connected to the first optical coupler and the fourth optical waveguide is optically connected to the second optical coupler.