A photonic platform based polarization controller providing a fixed target polarization is disclosed. The polarization controller has a polarization rotator splitter splitting the beam into first and second feeds corresponding to first and second orthogonal polarization components. A first Mach-Zehnder interferometer (MZI) stage provides a first phase delay between the first and second feeds based on a first control signal, and a first mixer mixes the first and second feeds to provide third and fourth feeds. A second MZI stage provides a second phase delay between the third and fourth feeds based on a second control signal, and a second mixer mixes the third and fourth feeds to provide fifth and sixth feeds. A third MZI stage provides a third phase delay between the fifth and sixth feeds based on a third control signal, and a third mixer mixes the fifth and sixth feeds to provide the fixed target polarization. An optical tap splits a portion of the beam.

Embodiments disclosed herein include photonics systems with a dual polarization module. In an embodiment, a photonics patch comprises a patch substrate, and a photonics die over a first surface of the patch substrate. In an embodiment, a multiplexer is over a second surface of the patch substrate. In an embodiment, a first optical path from the photonics die to the multiplexer is provided for propagating a first optical signal, and a second optical path from the photonics die to the multiplexer is provided for propagating a second optical signal. In an embodiment, a Faraday rotator is provided along the second optical path to convert the second optical signal from a first mode to a second mode before reaching the multiplexer.

An optical device includes a plurality of optical waveguide units arranged in a first direction. Each of the optical waveguide units includes a first mirror having a first reflecting surface, a second mirror having a second reflecting surface facing the first reflecting surface, and at least one optical waveguide region located between the first mirror and the second mirror. The distance between the first reflecting surface and the second reflecting surface is different for each of the optical waveguide units.

A display may have an array of display pixels that generate an image. A coherent fiber bundle may be mounted on the display pixels. The coherent fiber bundle may have a first surface that is adjacent to the display pixels and a second surface that is visible to a viewer. The coherent fiber bundle may contain fibers that carry light from the first surface to the second surface. The second surface may be planar or may have a central planar region and curved edge regions that run along opposing sides of the central planar region. The fibers may have cross-sectional surface areas with a first aspect ratio on the first surface and a second aspect ratio that is greater than the first aspect ratio on the second surface.

Silicon photonics provides an attractive platform for optoelectronic integrated circuits (OEICs) exploiting hybrid or monolithic integration with or without concurrent integration of microelectromechanical systems (MEMS) and/or CMOS electronic. Such OEICs offering optical component solutions across multiple applications from optical sensors through to optical networks operating upon one or more wavelengths. Accordingly, various silicon photonic building blocks are required in order to provide a toolkit for a circuit designer to exploit OEICs where these building blocks must address specific aspects of OEICs such as polarisation dependency of the optical waveguides. Accordingly, the inventors have established designs for: polarisation rotators with MEMS based tuning to allow the dual polarisations from a polarisation splitter to be managed by an OEIC operating upon a single polarisation; analog or digital phase shifts with MEMS actuation for switches, attenuators etc.; and passband filters with MEMS tuning.

A display may have an array of display pixels that generate an image. A coherent fiber bundle may be mounted on the display pixels. The coherent fiber bundle may have a first surface that is adjacent to the display pixels and a second surface that is visible to a viewer. The coherent fiber bundle may contain fibers that carry light from the first surface to the second surface. The second surface may be planar or may have a central planar region and curved edge regions that run along opposing sides of the central planar region. The fibers may have cross-sectional surface areas with a first aspect ratio on the first surface and a second aspect ratio that is greater than the first aspect ratio on the second surface.

A PIC that includes an InP-based polarization rotator having an improved design that enables at least one of an improved performance and an improved yield of the PIC due to at least one of reduced variations in critical dimensions of the InP-based polarization rotator and reduced overlay errors during fabrication of the InP-based polarization rotator of the PIC. An opto-electronic system including said PIC. A method of fabricating the PIC that includes the InP-based polarization rotator having the improved design.

A display may have an array of display pixels that generate an image. A coherent fiber bundle may be mounted on the display pixels. The coherent fiber bundle may have a first surface that is adjacent to the display pixels and a second surface that is visible to a viewer. The coherent fiber bundle may contain fibers that carry light from the first surface to the second surface. The second surface may be planar or may have a central planar region and curved edge regions that run along opposing sides of the central planar region. The fibers may have cross-sectional surface areas with a first aspect ratio on the first surface and a second aspect ratio that is greater than the first aspect ratio on the second surface.

A display may have an array of display pixels that generate an image. A coherent fiber bundle may be mounted on the display pixels. The coherent fiber bundle may have a first surface that is adjacent to the display pixels and a second surface that is visible to a viewer. The coherent fiber bundle may contain fibers that carry light from the first surface to the second surface. The second surface may be planar or may have a central planar region and curved edge regions that run along opposing sides of the central planar region. The fibers may have cross-sectional surface areas with a first aspect ratio on the first surface and a second aspect ratio that is greater than the first aspect ratio on the second surface.

An optical module of one embodiment includes a semiconductor modulator having a rectangular planar shape, an input lens system facing the input port, a first output lens system facing the first output port, a second output lens system facing the second output port, a first monitor element facing the first monitor port, a second monitor element facing the second monitor port, a first polarizer disposed between the first monitor port and the first monitor element, and a second polarizer disposed between the second monitor port and the second monitor element.