An optical communications apparatus, including a reconfigurable optical add/drop multiplexer, in which an optical deflection component may perform angle deflection on a plurality of first sub-wavelength light beams to obtain a plurality of second sub-wavelength light beams and a plurality of third sub-wavelength light beams, and propagate the plurality of second sub-wavelength light beams to a second optical switch array. A third wavelength dispersion component combines the plurality of second sub-wavelength light beams into a second light beam. A first output component outputs the second light beam from a dimension. A second wavelength dispersion component combines the plurality of third sub-wavelength light beams into a third light beam, and makes the third light beam incident to a third optical switch array. A second output component outputs the third light beam to drop a signal.

An apparatus is used for spectral beam combining laser wavelengths into a combined beam. The apparatus has an integrated, sealed optical assembly that can be installed and replaced in the field. The optical assembly has a housing composed of a material, such as fused silica, transparent to the laser wavelengths. Transmissive gratings are disposed on ends of the housing and have their datums facing the sealed interior. V-grooves on a shelf at one end of the housing are disposed at an angle relative to the first grating. Fiber ends of a fiber array have end caps affixed in the V-grooves and aligned to the datums of the first grating. The fiber ends transmit the laser wavelengths in an array of beams toward the first grating, which diffracts the laser wavelengths to the second grating. In turn, the second grating transmits the laser wavelengths as a combined beam from the second end of the housing.

Embodiments include a fiber to photonic chip coupling system including a collimating lens which collimate a light transmitted from a light source and an optical grating including a plurality of grating sections. The system also includes an optical dispersion element which separates the collimated light from the collimating lens into a plurality of light beams and direct each of the plurality of light beams to a respective section of the plurality of grating sections. Each light beam in the plurality of light beams is diffracted from the optical dispersion element at a different wavelength a light beam of the plurality of light beams is directed to a respective section of the plurality of grating sections at a respective incidence angle based on the wavelength of the light beam of the plurality of light beams to provide optimum grating coupling.

Embodiments include a fiber to photonic chip coupling system including a collimating lens which collimate a light transmitted from a light source and an optical grating including a plurality of grating sections. The system also includes an optical dispersion element which separates the collimated light from the collimating lens into a plurality of light beams and direct each of the plurality of light beams to a respective section of the plurality of grating sections. Each light beam in the plurality of light beams is diffracted from the optical dispersion element at a different wavelength a light beam of the plurality of light beams is directed to a respective section of the plurality of grating sections at a respective incidence angle based on the wavelength of the light beam of the plurality of light beams to provide optimum grating coupling.

The present disclosure is related generally to techniques for improving the performance and efficiency of display systems, such as laser scan beam display systems or other types of display systems (e.g., micro-displays) of an HMD system or other device. Display systems of the present disclosure may utilize polarization multiplexing that allow for improved optimization of diffraction optics. In at least some implementations, a display system may selectively polarize light dependent on wavelength (e.g., color) or field of view. An optical combiner may include polarization sensitive diffractive optical elements that are each optimized for a subset of colors or portions of an overall field of view, thereby providing improved correction optics for a display system.

Embodiments include a fiber to photonic chip coupling system including a collimating lens which collimate a light transmitted from a light source and an optical grating including a plurality of grating sections. The system also includes an optical dispersion element which separates the collimated light from the collimating lens into a plurality of light beams and direct each of the plurality of light beams to a respective section of the plurality of grating sections. Each light beam in the plurality of light beams is diffracted from the optical dispersion element at a different wavelength a light beam of the plurality of light beams is directed to a respective section of the plurality of grating sections at a respective incidence angle based on the wavelength of the light beam of the plurality of light beams to provide optimum grating coupling.

An optical device includes: wavelength selection elements; an optical switch that switches a propagation path of input light that is from an input port such that the input light propagates to one designated wavelength selection element among the wavelength selection elements; and a separation element disposed in the propagation path of the input light between the input port and the wavelength selection elements and that separates the input light into wavelength components.

An optical connector includes: a base substrate; an optical fiber on the base substrate; a plurality of optical devices having different wavelength bands and arranged in a curved shape concave toward the optical fiber to surround an end surface of the optical fiber; and an optical path changing device between the optical fiber and the plurality of optical devices and configured to diffract or refract incident light at different angles according to wavelength bands of the incident light. According to the optical connector, the arrangement of a plurality of light-emitting or light-receiving devices may be simplified and the number of communication channels may be easily increased in a multiplexing or demultiplexing structure in which a plurality of communication channels are provided using a single optical fiber.

The present disclosure relates to a signal processing apparatus and a signal processing method, a program, and a moving body that allow improvement of estimation accuracy for a self-position. One of a plurality of wavelengths of light is selected, and the light with the selected wavelength is projected. Reflected light of the projected light is received that is reflected from a reflector corresponding to an object having a reflectance higher than a predetermined reflectance, and the reflector is detected. This prevents interference of light projected by another vehicle, enabling appropriate detection of the reflector and improvement of estimation accuracy for a self-position. The present disclosure is applicable to an in-vehicle system.

A transmission grating optical beam combiner is provided. In some implementations, the beam combiner can include an optically transparent substrate and a transmission grating on the substrate. The transmission grating can be configured to combine and/or superimpose first and second input beams as a single output beam. The first input beam can be incident on the transmission grating at an angle corresponding to one diffraction order of the grating and the second input beam can be incident on the transmission grating at an angle corresponding to another diffraction order of the grating.