A device includes a waveguide, an in-coupling element, and an out-coupling element coupled with the waveguide. The waveguide, the in-coupling element, and the out-coupling element are configured to deliver a plurality of portions of an image light to an eye-box of the device. At least one of the in-coupling element or the out-coupling element includes a polarization selective diffractive element. The polarization selective diffractive element includes a grating including a plurality of microstructures defining a plurality of grooves filled with a passive optically anisotropic material having a first effective refractive index along a groove direction of the grooves and a second effective refractive index along an in-plane direction perpendicular to the groove direction. One of the first effective refractive index or the second effective refractive index substantially matches with a refractive index of the microstructures.

An optical amplification apparatus includes a plurality of input ends configured to receive a plurality of first optical signals with different wavelengths, a plurality of output ends configured to output a plurality of second optical signals obtained by amplifying the first optical signals, and a first pump source configured to provide a first pump light for amplifying the first optical signals. The apparatus also includes a first multi-port wavelength division multiplexing coupler having a plurality of first connection ports connected to the input ends. The apparatus further includes a first optical fiber connection cable connecting the first pump source with the first multi-port wavelength division multiplexing coupler. The first optical fiber connection cable is configured to transmit the first pump light. The apparatus additionally includes an active optical fiber connection cable having an active doped fiber for transmitting and amplifying a plurality of third optical signals.

A WDM1r combiner for a PON. The output end of an input waveguide is connected to the input end of a first grating filter, the output end of the first grating filter is connected to the input ends of a first mode filter, a second grating filter, a second mode filter, a connecting waveguide, a third grating filter, a third mode filter, and a fourth grating filter in sequence, and the output end of the fourth grating filter is connected to an output waveguide. The function of the WDM1r combiner for a PON is achieved in the form of cascaded grating filters; different central wavelengths and bandwidths of four channels are obtained by optimizing a grating structure; an on-chip WDM1r combiner which is low in insertion loss and crosstalk and has flat-top response is obtained; the combiner has the advantages of being simple in structure, simple in process, excellent in performance, etc.

An optical device and a spectral detection apparatus are provided. The optical device includes an optical waveguide, including: a polychromatic light channel configured to transport a polychromatic light beam, and provided with a light incident surface for receiving the incident polychromatic light beam at an input end of the polychromatic light channel; a chromatic dispersion device arranged downstream from the polychromatic light channel in an optical path and configured to separate the polychromatic light beam from the polychromatic light channel into a plurality of monochromatic light beams; and a plurality of monochromatic light channels arranged downstream from the chromatic dispersion device in the optical path and configured to respectively conduct the plurality of monochromatic light beams with different colors from the chromatic dispersion device. Monochromatic light output surfaces are respectively provided at output ends of the plurality of monochromatic light channels and configured to output the monochromatic light beams.

The present disclosure provides a three-dimensional packaging method and a three-dimensional package structure of a photonic-electronic chip. The method includes: fixing an electronic chip on a first area of a first surface of a photonic chip; fixing a dummy chip on a second area of the first surface of the photonic chip, wherein the photonic chip is provided with an optical coupling interface at the second area, and the dummy chip has a cavity with a single-sided opening, and the opening of the cavity faces and covers an optical coupling interface.

An optical switching apparatus includes an input port, a dispersion component, a first filter, a redirection component, and output ports. The input port enables a first and a second beam to be incident onto the dispersion component, which decomposes the first and the second beams respectively into a plurality of first and second sub-beams, where the plurality of first sub-beams and second sub-beams belong to different bands. The first filter separates transmission directions of the plurality of first and second sub-beams into different transmission directions in a first direction (X) based on the different bands, enables the plurality of first and second sub-beams respectively to be incident onto a first area and a second area of the redirection component, where the first and second areas are separated in the first direction.

Optical telecommunication receivers and transmitters are described comprising dispersive elements and adjustable beam steering elements that are combined to provide optical grid tracking to adjust with very low power consumption to variations in the optical grid due to various changes, such as temperature fluctuations, age or other environmental or design changes. Thus, high bandwidth transmitters or receivers can be provides with low power consumption and/or low cost designs.

A wavelength selective switch, including: an optical fiber array, an optical signal processing device and an output selection device. The optical fiber array includes multiple dual-core optical fibers arranged in parallel, one dual-core optical fiber being used for inputting two optical signals; the optical signal processing device is located at an output end of the optical fiber array and is used for splitting the two optical signals into sub-signals of different wavelengths and projecting the sub-signals of different wavelengths to different spectral band regions in the output selection device; and the output selection device is located at the rear end of the optical signal processing device, and is used for processing the sub-signals projected to the spectral band regions, so as to respectively perform output selection on the sub-signals split from two optical signals, thereby achieving a dual-switch function.

An optical sensor comprises foreoptics configured to receive an image signal, an image optic operable to focus the image signal, at least one focal plane array (FPA) configured to detect the image signal, and a jitter stabilization system. The jitter stabilization system can comprise a transmitter configured to transmit a jitter source signal to the foreoptics and a position sensor configured to receive a jitter return signal. The position sensor can be positioned at a shared focus with the at least one FPA. The optical sensor further comprises a diffraction grating operable to reflect and diffract at least a portion of the jitter source signal. The jitter return signal received at the position sensor comprises at least a portion of the reflected and diffracted jitter source signal.

In an example embodiment, a WSS may include a steering element, an optical subsystem, and a cylindrical lens. The optical subsystem may include a collimating lens and a dispersive element. The optical subsystem may be located between a fiber array and the steering element. The collimating lens may be located between the fiber array and the dispersive element. The cylindrical lens may be located between the optical subsystem and the steering element.