Abstract: A wavelength conversion device includes a nonlinear optical crystal, a guide light source configured to provide a guide light traveling in a first direction within the nonlinear optical crystal such that a thermal waveguide penetrating the nonlinear optical crystal is formed, a signal light source configured to provide a signal light having a first wavelength (?1) and traveling in a second direction opposite to the first direction through the thermal waveguide, and a pump light source configured to provide a pump light having a second wavelength (?2) and traveling in the second direction through the thermal waveguide, wherein an output light including a wavelength component corresponding to a sum of energies of the first wavelength (?1) and the second wavelength (?2) is provided from the thermal waveguide.

Abstract: A semiconductor device includes a silicon substrate having a first region and a second region. The semiconductor device includes a silicon lens formed in the first region and along a surface of the silicon substrate on a first side of the silicon substrate. The semiconductor device includes a photonic die disposed in the first region and on a second side of the silicon substrate, the second side being opposite to the first side. The semiconductor device includes a waveguide disposed on the second side of the silicon substrate and having a grating coupler.

Abstract: An optical coupling device includes a first waveguide layer, including a first semiconductor material, which is disposed over a dielectric substrate layer. A dielectric intermediate layer overlies the first waveguide layer. A second waveguide layer, which includes a different, second semiconductor material, is disposed over the dielectric intermediate layer and is patterned to define a waveguide. A first grating in the second waveguide layer diffracts light of a given wavelength from the waveguide into a specified diffraction order at a given coupling angle, whereby a first fraction of the light propagates out of the device while a second fraction of the light is diffracted into the intermediate dielectric layer in a conjugate diffraction order. A second grating in the first waveguide layer diffracts the second fraction of the light into a second diffraction order, propagating out of the device at the given coupling angle.

Abstract: Package devices and methods of manufacture are discussed. In an embodiment, a method of manufacturing an integrated circuit device includes: forming an optical device layer; forming an optical layer on the optical device layer; after the forming the optical layer, forming a first opening in the optical layer; and embedding a reflective structure in the first opening.

Abstract: Cascaded Mach-Zehnder Interferometer (CMZI) structures comprising electrically resistive heaters provisioned across the stages so as to enable improved filter wavelength control. In embodiments, CMZI heater power supply control is made a linear function by scaling the number of heater elements between the stages in proportion with the magnitude of the arm differential (e.g., ?L, 2?L) for the corresponding stage.

Abstract: An optical waveguide device includes an optical waveguide formed on a substrate, in which an optical modulator section that modulates a light wave propagating through the optical waveguide is formed in a part of the optical waveguide, in which a first dielectric layer covers the optical waveguide, and a second dielectric layer formed of a different material from the first dielectric layer is disposed on the first dielectric layer in a part of the optical waveguide excluding the optical modulator section.

Abstract: There is disclosed a method of generating terahertz radiation which comprises: (a) depositing an ink on a substrate (2), wherein the ink comprises particles (3) of a semiconductor; (b) allowing the ink to form a coating; (c) shining a laser onto the coating so as to generate terahertz radiation.

Abstract: A single arm laser system comprising a first in-phase quadrature modulator, IQM. The first IQM is configured to receive a single frequency fibred laser beam from a frequency locked laser seed, generate a first single side-band frequency based on a carrier frequency of the single frequency fibred laser beam and suppress the carrier frequency, and output a first fibre laser beam having a single side-band suppressed carrier frequency. The single arm laser system also comprises a second IQM in line with the first IQM. The second IQM is configured to receive the first fibre laser beam from the first IQM, generate a second single side-band frequency based on the first single side-band frequency and maintain the first single side-band frequency as the carrier frequency, and output a second fibre laser beam having the first and second single side band frequencies.

Abstract: An optoelectronic package includes a first photonic component, an optical connection element and an optical component. The optical connection element is disposed at least partially over the first photonic component. The optical component is disposed at least partially over the first photonic component. The optical connection element and the optical component are spaced apart from each other.

Abstract: A wavelength-division multiplexing device or a communications device may include a fastener, optical fibers, a filter, and a lens. The fastener is provided with an optical fiber positioning hole and a filter mounting groove, the filter mounting groove is disposed on a side of a tail end that is of the optical fiber positioning hole and that is away from an opening of the optical fiber positioning hole, and the filter mounting groove and the tail end of the optical fiber positioning hole are spaced apart. The optical fiber may be installed in the optical fiber positioning hole, the filter may be installed in the filter mounting groove, and the filter may transmissively transmit or reflect light rays emitted from the optical fiber.

Abstract: A head-up display, such as found in smart glasses, may include a light source configured to project light for display. A heads-up display may include a polymer aerogel optical waveguide configured to receive the light from the light source, guide the received light to an area in front of an eye of a user, and project the light to the eye of the user. The polymer aerogel optical waveguide can include a core portion made from a glass having a relatively high index of refraction and a cladding portion made from a polymer aerogel having a relatively low index of refraction so that light is guided in the core portion by total internal reflection at an interface between the core portion and the cladding portion.

Abstract: An elongate multi-core optical fiber instrument for insertion within a patient body includes a set of first optical fiber cores extending along a first sensing region of the multi-core optical fiber instrument, where each first optical fiber core includes a set of first sensors disposed along the first region and a set of second optical fiber cores extending along a second sensing region of the multi-core optical fiber instrument, where each second optical fiber core includes a set of second sensors disposed along the second sensing region. The first sensing region is located distal the second sensing region, and the first optical fiber cores extend along the second sensing region. Also disclosed is a console for providing an incident light signal to the multi-core optical fiber instrument, receiving reflected light signals from the sensors, and determining a parameter experienced by instrument in accordance with the reflected light signals.

Abstract: Described examples include an apparatus includes a dichroic wedge and a spatial light modulator optically coupled to the dichroic wedge. The apparatus also includes a display optically coupled to the spatial light modulator. The display includes a waveguide having a first side and a second side and a first diffractive optical element on the first side of the waveguide. The display also includes a second diffractive optical element on the first side of the waveguide and a third diffractive optical element on the second side of the waveguide.

Abstract: Structures including a photonics chip and a surface-mounted laser chip, and methods of forming same. The structure comprises a photonics chip including a surface, a laser chip including a light output and a body that are spaced from the surface of the photonics chip, a first adhesive between the body of the laser chip and the surface of the photonics chip, and a second adhesive between the body of the laser chip and the surface of the photonics chip. The light output is oriented toward the surface of the photonics chip, the first adhesive has a first thermal conductivity, the second adhesive has a second thermal conductivity that is less than the first thermal conductivity of the first adhesive, and the second adhesive is disposed in a light path between the light output of the laser chip and the surface of the photonics chip.

Abstract: Disclosed is a plasmonic device (10), comprising: a substrate (11); and a dielectric layer (13) arranged between a base metal layer (12) and a structured metal layer (14) which form with respect to the substrate (11) a vertical stack of layers, wherein the structured metal layer (14) includes arranged in a horizontal direction an input structure (141) for enabling an input section (21), a waveguide structure (142) for enabling a plasmonic waveguide (22), and an output structure (143) for enabling an output section (23), wherein the input section (21) is configured to receive an optical input signal (31) and transmit input power (41) to the plasmonic waveguide (22), wherein the plasmonic waveguide (22) is configured to receive input power (41) from the input section (21) and transmit output power (43) to the output section (23), and wherein the output section (23) is configured to receive output power (43) from the plasmonic waveguide (22) and transmit an optical output signal (33).

Abstract: An optical connector cleaning tool includes a supplier that supplies a cleaning element having a belt shape, a cleaning shaft including a head having a pressing surface that presses the cleaning element supplied from the supplier against a connection end surface of an optical connector and a supporter supporting the head part, a collector that collects the cleaning element from the pressing surface, and a tubular member having an inner hole accommodating the cleaning shaft such that the head protrudes from the inner hole. The cleaning element collected from the pressing surface to the collector passes between an inner surface of the inner hole and a first facing portion of the head facing the inner surface. The first facing portion includes a first region in which the cleaning element is interposed between the inner surface and the first facing portion and a second region adjacent to the first region.

Abstract: Entangled optical outputs are generated using one or more heralded entanglement sources, each comprising: first and second free-running entanglement sources, each providing a first (third) optical output comprising a quantum superposition of a pair of orthogonal optical modes, and a second (fourth) optical output comprising a quantum superposition of a pair of orthogonal optical modes; an optical module configured to perform an interferometric measurement based on optical interference between at least a portion of the first optical output and at least a portion of the third optical output, and to generate one or more detection signals based on the interferometric measurement in a series of time slots; and a trigger module configured to generate a trigger signal based on the one or more detection signals to indicate one or more time slots in which the second optical output and the fourth optical output are entangled with each other.

Abstract: A cable management and mounting system including: a base portion; a support portion configured to slidingly attach to the base portion; and a lateral portion configured to slidingly attach to the base portion. The support portion may include an adapter receiving portion. A space between the base portion and the support portion may be configured to receive a communication device. The support portion and the lateral portion may be configured to receive different sized communication devices, different sized adapter units, and cable in an arrangement that may be configured to accommodate the different sized communication devices, the different sized adapter units, and the cable using adapter mounting portions and cable management structures that may be configured to engage with the support portion to avoid a need for additional mounting structures.

Abstract: The present disclosure reduces the possibility that a protrusion and a conductor layer will be damaged during the bonding of a lid to an optical waveguide module. An optical waveguide module includes a substrate, a core, a cladding layer, and a conductor layer. The substrate has a first surface. The core extends in a first direction. The cladding layer is disposed on the first surface 1a and extends over and around the core. The conductor layer is disposed on the cladding layer. The cladding layer includes a protrusion, which extends over the core. The protrusion has a second surface, which is covered with the conductor layer. The protrusion includes a portion where the second surface extends along the first surface and is wider than the core.

Abstract: This application relates to a backlight module, including a middle frame, a back plate, a light guide plate and an optical film. The back plate includes a base plate and a side plate, and in a light-exiting direction of the light guide plate, a distance between a top surface of the side plate and the base plate is less than or equal to a distance between a light-exiting surface of the light guide plate and the base plate. The middle frame includes a top wall and side wall, the top wall covers a portion of the optical film, the side wall is arranged at one side of the side plate away from the light guide plate, and the side wall has a first snap-fastener projecting in a direction close to the light guide plate and connected to the side plate. A display module and display device are further provided.