A photonic integrated circuit (PIC) includes one or more couplers to interface a light source with the PIC, a splitter directly coupled to the one or more couplers at a coupling point of the PIC, a modulator to receive light from the couplers, and a connecting waveguide to connect the splitter to the modulator. The waveguide may be a rib waveguide. The PIC may be integrated with devices such as a CWDM or a PSM device, and may provide improved performance and lower attention for high optical power applications.

A photonic integrated circuit (PIC) includes one or more couplers to interface a light source with the PIC, a splitter directly coupled to the one or more couplers at a coupling point of the PIC, a modulator to receive light from the couplers, and a connecting waveguide to connect the splitter to the modulator. The waveguide may be a rib waveguide. The PIC may be integrated with devices such as a CWDM or a PSM device, and may provide improved performance and lower attention for high optical power applications.

A grating coupler integrated in a photonically-enabled circuit and a method for fabricating the same are disclosed herein. In some embodiments, the grating coupler includes a substrate comprising a silicon wafer, a first grating region etched into the substrate, wherein the first grating region comprises a first plurality of gratings having a first predetermined height, and a second grating region etched into the substrate, wherein the second grating region comprises a second plurality of gratings having a second predetermined height and wherein the first and second predetermined heights are not identical.

A grating coupler integrated in a photonically-enabled circuit and a method for fabricating the same are disclosed herein. In some embodiments, the grating coupler includes a substrate comprising a silicon wafer, a first grating region etched into the substrate, wherein the first grating region comprises a first plurality of gratings having a first predetermined height, and a second grating region etched into the substrate, wherein the second grating region comprises a second plurality of gratings having a second predetermined height and wherein the first and second predetermined heights are not identical.

An augmented reality system (2) is disclosed for use in bright external conditions. The augmented reality system includes: a projector (6), a substantially transparent optical component (4) that provides augmented reality light to a user, and a stray light rejection layer (12). The stray light rejection layer (12) further comprises a plurality of slats (16) arranged at a plurality of respective angles to effectively reduce high angle incident light from the external environment from reaching the transparent optical component (4).

A light guide for guiding light for an HMD includes at least one input coupling structure and at least one output coupling structure. The output coupling structure can be oriented such that for all the rays that are coupled out by the output coupling structure and for which the wave vector k has a negative ratio ky/kxz after they have been coupled out, the wave vector k in the light guide has a ratio of ky/kxz of greater than −0.2, and/or that for all the rays that are coupled out by the output coupling structure and for which the wave vector k has a positive ratio ky/kxz after they have been coupled out, the wave vector k in the light guide has a ratio of ky/kxz of less than +0.2.

A ranging apparatus for use in a plasma processing chamber having an internal space and a window is disclosed. The ranging apparatus includes at least one external light emitting device disposed external to the plasma processing chamber. The external light emitting device emits at least one source light beam to the internal space through the window. The ranging apparatus includes a base wafer disposed on a stage in the internal space. The ranging apparatus includes at least one optical circuit fixed to the base wafer. The optical circuit deflects the source light beam to a target in the internal space, and deflects a reflection light beam to the window. The ranging apparatus includes at least one external light receiving device disposed external to the plasma processing chamber. The external light receiving device receives the deflected reflection light beam through the window.

A ranging apparatus for use in a plasma processing chamber having an internal space and a window is disclosed. The ranging apparatus includes at least one external light emitting device disposed external to the plasma processing chamber. The external light emitting device emits at least one source light beam to the internal space through the window. The ranging apparatus includes a base wafer disposed on a stage in the internal space. The ranging apparatus includes at least one optical circuit fixed to the base wafer. The optical circuit deflects the source light beam to a target in the internal space, and deflects a reflection light beam to the window. The ranging apparatus includes at least one external light receiving device disposed external to the plasma processing chamber. The external light receiving device receives the deflected reflection light beam through the window.

An optical device that includes a multicore optical fiber having at least two cores. An alignment feature is attached at the first end of the first multicore optical fiber. The device also includes a substrate having at least two waveguides, each waveguide comprising a redirecting feature. A fiber holder is located on the substrate to hold the multicore fiber in a correct axially rotational orientation using the alignment feature, so that light couples between the cores of the multicore fiber and respective waveguides in the substrate.

A waveguide comprises a first surface and a second surface. The first surface comprises a first plurality of grating structures. The waveguide is configured to guide an in-coupled light beam to undergo total internal reflection between the first surface and the second surface. The first grating structures are configured to disrupt the total internal reflection to cause at least a portion of the in-coupled light beam to couple out of the waveguide and project from the first surface, the portion of the in-coupled light beam coupled out of the waveguide forming out-coupled light beams, the out-coupled light beams being configured to form an array of dots on a surface where the out-coupled light beams are projected on.