Abstract: To manufacture an optical waveguide including a substrate, a lower cladding layer formed on the substrate, a core layer formed on the lower cladding layer, a sinking prevention layer formed to cover the core layer and the lower cladding layer, and an upper cladding layer formed on the sinking prevention layer, in which the sinking prevention layer is composed of a material having a higher melting point than that of a material composing the lower cladding layer.

Abstract: A remote radio unit, RRU, has an outer shell housing radio equipment and at least one fiber optical transceiver module. The fiber optical transceiver module comprises, a casing provided with an interface having a transmitter output, and a Transmitter Optical Sub-Assembly, TOSA, arranged within said casing, where said TOSA transmits light through said transmitter output. The fiber optical transceiver module is physically attached to a heat transferring structure adapted to transfer heat generated in said fiber optical transceiver module to a heat sink arranged outside said outer shell. The proposed technology also provides a fiber optical transceiver module comprising a casing provided with an interface having a transmitter output and a TOSA arranged within said casing and adapted to transmit light through said transmitter output, wherein said casing is further provided with thermal pads arranged on the surface of said casing, said thermal pads may connect to a thermal conductor.

Abstract: The present embodiment discloses a photonic chip module, LiDAR, and a mobile device. The photonic chip module includes a photonic chip and a reflection unit. The photonic chip includes a cladding and multiple first transceiving waveguide modules. The first transceiving waveguide module is embedded in the cladding, and the first emergent end and the first incident end are arranged at intervals along a first preset direction, collectively forming the first transceiving end of each first transceiving waveguide module, with these ends being spaced along a second preset direction. The reflection unit includes multiple reflection modules arranged along the second preset direction. Each reflection module has a first reflection surface. The photonic chip module provided in this embodiment is advantageous for increasing the detection field of view of the LiDAR under the same resolution conditions.

Abstract: An optical device configured to be coupled with an optical fiber is described. The optical device includes a waveguide, a low-confinement waveguide, and a low-confinement layer. The waveguide includes a high-confinement waveguide, which has a first index of refraction. The low-confinement waveguide is optically coupled with the high-confinement waveguide. At least a portion of the low-confinement waveguide has a second index of refraction less than the first index of refraction. The low-confinement waveguide has a thickness of at least a mode diameter in a portion of the optical fiber. The low-confinement layer is adjacent to a portion of the low-confinement waveguide. The low-confinement layer has a third index of refraction less than the second index of refraction.

Abstract: The present disclosure relates to features of a telecommunication enclosure. Example features can include mounting plate attachment features, housing latching features, housing hinge features and fiber routing features.

Abstract: An electro-optic device, such as an optical modulator, comprises: a driver for generating a plurality of identical time-synchronized copies of an input electrical signal, and a photonic integrated circuit, including an optical waveguide structure and a plurality of phase-modulating electro-optical modulator segments. Each one of the modulator segments configured to receive a respective one of the plurality of the copies of the input electrical signal. Instead of incorporating a required phase delay between the copies of the input electrical signal into the driver structure, a multi-layer interconnect substrate is provided that includes a plurality of insulating layers alternating with a plurality of conductive layers.

Abstract: A polarization-independent, optical circulator is formed in silicon photonics. The polarization-independent, optical circulator uses an optical splitter having two couplers and two waveguides joining the two couplers. One of the two waveguides is thinner than the other to create a large effective index difference between TE and TM modes transmitted through the one waveguide. Polarization rotators, including reciprocal and/or non-reciprocal rotators, are further used to create the optical circulator.

Abstract: An output coupler can be used to couple multiple channels of light from a semiconductor waveguide to an optical fiber for wavelength division multiplexing. To couple light of a wide bandwidth (e.g., equal to or greater than 100 nm), two symmetrical gratings on two sides of a Fabry Perot cavity is used. The two symmetrical gratings are optimized to both reflect light for a Fabry Perot resonator and couple light out of the semiconductor waveguide.

Abstract: A tapered waveguide. In some embodiments, the waveguide has a narrow end and a wide end. A taper angle of the waveguide may be, at each point along the waveguide, less than an adiabatic taper angle by a margin. The margin may be greater at a first point than at a second point, where the adiabatic taper angle is less at the first point than at the second point.

Abstract: An eyepiece waveguide includes a set of waveguide layers having a world side and a user side. The eyepiece waveguide also includes a first cover plate having a first optical power and disposed adjacent the world side of the set of waveguide layers and a second cover plate having a second optical power and disposed adjacent the user side of the set of waveguide layers.

Abstract: A device comprises first, second and third elements fabricated on a common substrate. The first element comprises an active waveguide structure comprising: a first portion supporting a first optical mode. The second element comprises a passive waveguide structure supporting a second optical mode. The third element, at least partly butt-coupled to the second portion, comprises an intermediate waveguide structure supporting intermediate optical modes. At least part of the second element is non-linear, supporting frequency conversion. A tapered waveguide structure in at least one of the second and third elements facilitates efficient adiabatic transformation between the first optical mode and one intermediate optical mode. No adiabatic transformation occurs between any intermediate optical mode and the first optical mode. Mutual alignments of the elements are defined using lithographic alignment marks.

Abstract: A light emission apparatus includes a laser diode configured to emit a light; a laser driver electrically coupled to the laser diode, the laser driver being configured to drive the laser diode to generate the light; and an optical module arranged to receive the light emitted by the laser diode, the optical module comprising at least one optical element and being configured to adjust the light and emits a transmitting light; wherein the transmitting light emits from the optical module with an illumination angle and the optical module adjusts the light to vary the illumination angle.

Abstract: A device for optical signal processing includes a first layer, a second layer and a waveguiding layer. A lens is disposed within the first layer and adjacent to a surface of the first layer. The second layer is underneath the first layer and adjacent to another surface of the first layer. The waveguiding layer is located underneath the second layer and configured to waveguide a light beam transmitted in the waveguiding layer. A grating coupler is disposed over the waveguiding layer. The lens is configured to receive, from one of the grating coupler or a light-guiding element, the light beam, and focus the light beam towards another one of the light-guiding element or the grating coupler.

Abstract: An optical device includes a first waveguide extending in a first direction and a second waveguide connected to the first waveguide. The second waveguide includes a first mirror, a second mirror, and an optical waveguide layer. At least either the first waveguide or the second waveguide has one or more gratings in a part of a connection region in which the first mirror, the second mirror, and the first waveguide overlap one another when seen from an angle parallel with a direction perpendicular to a first reflecting surface of the first mirror. The one or more gratings is at a distance that is longer than at least either a thickness of the first mirror or a thickness of the second mirror in the first direction from an end of the first mirror or the second mirror that is in the connection region.

Abstract: A semiconductor structure including a semiconductor substrate, a first patterned dielectric layer, a grating coupler and a waveguide is provided. The semiconductor substrate includes an optical reflective layer. The first patterned dielectric layer is disposed on the semiconductor substrate and covers a portion of the optical reflective layer. The grating coupler and the waveguide are disposed on the first patterned dielectric layer, wherein the grating coupler and the waveguide are located over the optical reflective layer.

Abstract: An optical resonant modulator based on coupling modulation, comprising a resonant structure with an embedded Mach-Zehnder interferometer that is differentially driven to induced amplitude modulation at the output port. The principle of coupling modulation enables high data/baud rates to be achieved in a photonic integrated circuit, e.g. silicon, footprint that is considerably smaller than that of a conventional traveling-wave Mach-Zehnder modulator, in particular by utilizing space saving features, such as ring resonator phase shifters and bend waveguide arms.

Abstract: This optical connector includes a ferrule, a plug frame, and an elastic member. The ferrule holds a glass fiber of an optical fiber. The plug frame receives the ferrule. The elastic member holds, with a first length, the ferrule in a first position in the plug frame, or holds, with a second length shorter than the first length, the ferrule in a second position in the plug frame. When the ferrule is in the first position, the ferrule and the plug frame are in contact with each other via the tapered surface, and the pivotal movement of the ferrule to the plug frame is restricted. When the ferrule is in the second position, the ferrule is not in contact with the plug frame and is pivotable to the plug frame, and the ferrule is in a floating state.

Abstract: An optical device includes a core formed on a substrate, a first source electrode and a second source electrode formed in contact with both side surfaces of the core interposed between the first source electrode and the second source electrode, and a drain electrode formed in contact with an upper surface of the core. The core, the first source electrode, and the second source electrode together form a plasmonic waveguide. The first source electrode and the second source electrode are Schottky coupled to the core.

Abstract: A diffraction optical waveguide is disclosed, which comprises a grating structure formed on a waveguide substrate. The grating structure comprises a plurality of optical unit structures arranged in an array along a plane; the optical unit structure has a first end and a second end in a first direction parallel to the plane, a distance between the two ends along the first direction is a length L of the optical unit structure; it has a maximum width W perpendicular to the first direction in a predetermined section along the first direction, where 0.3L?W?0.7L, and a central position of the predetermined section is at a predetermined distance d from the first end in the first direction, where d<0.5L; and a width gradually decreases from the predetermined section to both ends, so that a centroid of a cross-section of the optical unit structure is closer to the first end.

Abstract: There is provided an optical connection structure in which an optical fiber and an optical semiconductor waveguide are easily connected with low loss. The present invention relates to an optical connection structure configured to connect an optical waveguide device and an optical fiber including cores having different refractive indexes, wherein an optical connection component using a planar lightwave circuit is bonded and fixed on an end surface of an input/output waveguide of the optical waveguide device, a value of a refractive index of a core of the planar lightwave circuit is between a value of the refractive index of the core of the optical waveguide device and a value of the refractive index of the core of the optical fiber, and the optical waveguide device and the optical fiber are optically connected via the planar lightwave circuit.