Abstract: Disclosed is a system of measurement for optical loss that includes the light source unit that is further provided to the first fiber port assembly. The first fiber port assembly is connected with the first grating coupler unit. The first grating coupler unit is connected with the splitter unit. The splitter unit diverts the light to the plurality of routes. The plurality of route is combined with the combiner module. The combiner module is connected with the second grating coupler unit. The second grating coupler unit is connected with the second fiber port assembly. The second fiber port assembly is connected with an optical power detector module.

Abstract: An optical beam sculpting assembly defines optical beam characteristics of an optical beam, and comprises a chip substrate, a beam forming and steering structure positioned on the chip substrate, adapted to emit, to receive, and/or to steer the optical beams, and at least one phase mask, with each phase mask having at least one corresponding core having a thickness, and a height. The beam forming and steering structure is positioned between the at least one phase mask and the chip substrate, and the at least one phase mask is configured to modify the optical beam characteristics of the optical beam. The optical beam characteristic comprises at least one of a spatial distribution of optical amplitude, a temporal distribution of optical amplitude, an optical phase, a polarization, and an optical orbital angular momentum.

Abstract: Disclosed is a system of measurement for optical loss that includes the light source unit that is further provided to the first fiber port assembly. The first fiber port assembly is connected with the first grating coupler unit. The first grating coupler unit is connected with the splitter unit. The splitter unit diverts the light to the plurality of routes. The plurality of route is combined with the combiner module. The combiner module is connected with the second grating coupler unit. The second grating coupler unit is connected with the second fiber port assembly. The second fiber port assembly is connected with an optical power detector module.

Abstract: The invention relates to photonic differential modulators and more particularly different electrode configurations for differential driving schemes for reducing the driving voltage for a given phase shift and device footprint. The embodiments comprise of two reverse-biased p-n junctions driven in a push-pull configuration from signal (S) to signal bar (S-bar). The first embodiment shares the S-bar electrode between two p-n junctions to reduce the device footprint at the expense of difficult impedance matching. The second embodiment does not contain any shared electrode and instead adds additional electrodes for the sake of easier impedance matching. Specifically, the second embodiment decouples the two p-n junctions along with their respective transmission lines for ease of impedance matching. The third embodiment shares both the S and S-bar electrodes through an interleaved electrode design to reduce the device footprint, and makes impedance matching easier by slow-wave effect on the transmission lines.

Abstract: An optical phased array comprises photonic components for on-chip beam forming and steering, and is adapted to use an input optical field of a beam having a wavelength which ranges from visible light to a short-wavelength infrared region. The photonic component comprises at least a waveguide and a plurality of scatterers, with each scatterer having a diagonal which is at most about one-tenth the wavelength of the input optical field.

Abstract: Disclosed embodiments relate to a thermal optical phase shifter and a method for adjusting speed and efficiency of intensity modulation using the thermal optical phase shifters. The thermal optical phase shifters comprise a substrate defining at least one trench within a portion of the substrate and a Buried Oxide (BOX) layer formed above the substrate. The BOX layer is disposed along a length of the substrate. The thermal optical phase shifter comprises a waveguide disposed over the BOX layer to guide an input signal, and the substrate extends partially outwards on opposite sides of the waveguide. The method comprises receiving the input signal by the thermal optical phase shifter, adjusting a voltage applied to a heater of the thermal optical phase shifter and transmitting an output signal from the thermal optical phase shifter.

Abstract: A fiber array for edge coupling of at least one optical fiber with at least one wafer substrate is provided. The fiber array includes an optical fiber core; a cladding covering the optical fiber core; a V-groove mount at the top of the cladding; and a polished and tapered lid at the bottom of the cladding. FIG. 4 accompanies the abstract.

Abstract: An antenna or antenna array for a steerable light beam, the antenna array comprising a plurality of linear antenna arrays (100), each linear antenna array comprising: a plurality of antenna elements (104); a waveguide (102) supporting the antenna elements having a length and a thickness; and a control element (400, 402, 404), adjacent to the waveguide, arranged to induce a change in refractive index along at least a part of the length of the waveguide and in at least a part of the thickness of the waveguide, wherein the change in refractive index in the waveguide causes a phase shift in light emitted via each of the plurality of antenna elements.

Abstract: The present disclosure relates generally to a hybrid modulator and methods of integrating hybrid materials, such as lithium-niobate-on-insulator, onto silicon-on-insulator (SOI) wafers for hybrid silicon photonics integration, while maintaining compatibility with standard silicon photonics components. In particular, the silicon on insulator (SOI) and lithium-niobate-on-insulator (LNOI) are bonded together to allow the modulator to be compatible with lithium-niobate devices or silicon devices via a single transition layer.

Abstract: The present disclosure relates generally to a single photon avalanche diode (SPAD) having a rib waveguide with a doping profile having a multiplication junction, a top cladding layer disposed on a top surface of the rib waveguide, a bottom cladding layer disposed on a bottom surface of the rib waveguide. The SPAD has an anode, a cathode and two field plates. The anode, cathode and the two field plates are configured to suppress the electric field over the multiplication junction relative to a SPAD without the at least two field plates, and the two field plates and/or cathode are positioned adjacent to the intersection of the multiplication junction and the top cladding layer.

Abstract: An integrated cavity-enhanced photodetector for visible photonics is provided. The photodetector includes a waveguide, an absorption layer, a set of metal contacts and a phase shifter. The photodetector can be used for visible photonics with multi-material integration flow and low loss.

Abstract: A III-V/Si hybrid MOS optical modulator with a traveling-wave electrode for high-efficiency and high-bandwidth optical modulation is disclosed. The III-V/Si hybrid MOS optical modulator equipped with a traveling-wave electrode becomes a traveling-wave modulator. The traveling-wave modulator comprises a III-V compound semiconductor layer, a silicon layer and an oxide layer between the III-V compound semiconductor layer and the silicon layer. The traveling-wave modulator comprises of at least one first metallic layer, at least one second metallic layer and a semiconductor layer. The electrode trace width of each second metallic layer and the spacing between adjacent second metallic layers are adjusted to achieve the impedance and velocity matching. A traveling-wave electrode is designed to integrate with the III-V/Si hybrid MOS optical modulator under forward and reverse bias.

Abstract: A distributed feedback laser integrated on silicon comprising a combination of a waveguide of a first material and a laser diode a second material, different from the first material, wherein the laser diode comprises a plurality of regularly spaced metalized grating elements which form a single longitudinal mode; wherein the waveguide comprises a plurality of waveguide elements separated by metalized regions; and wherein the metalized grating elements and the metalized regions are adapted to be coupled to one another to form the distributed feedback laser.

Abstract: A hybrid photonic chip comprising a plurality of semiconductor materials arranged to define a chip providing a function, wherein at least a first part of the chip is formed of materials which can be fabricated using a CMOS technique; and at least a second part of the chip which comprises non-linear crystal material and is not subjected to etching process; wherein the second part of the chip in conjunction with the first part is configured to support a propagating low loss single mode.

Abstract: The present invention relates of a photonic integrated and a method of fabricating a photonic integrated chip, PIC, configured for alignment and attachment of a laser diode in a predetermined position in which light from the laser diode is aligned with an input of the PIC; wherein the photonic chip comprises an asymmetric alignment assembly for receiving and aligning the laser diode in the predetermined position; and wherein the input comprises a coupler for receiving a laser beam from the laser diode in use.

Abstract: A tunable element for an optical waveguide device, such as an Optical Phased Array (OPA), is described. Tunable element comprises three waveguide sections arranged such that light propagates through the first waveguide section, then through the second waveguide section and then through the third waveguide section, with light being either evanescently or directly coupled from one waveguide section to the next. The tunable element further comprises one or more resistive heating pad formed proximate to the second waveguide section. The first and third waveguide sections are formed from a first material and the second waveguide section is formed from a second, different material and the second material is more thermo-optically sensitive than the first material.

Abstract: Various embodiments may provide an optical phase array. The optical phase array may include a laser source configured to emit a laser. The optical phase array may further include an integrated photonic network with n stages of optical splitters, the optical splitters being 1 ? 2 optical splitters, each optical splitter of the integrated photonic network having an input, a first output, and a second output. The integrated photonic network may be configured to separate the laser into N outputs. Each output of the N outputs may differ from a neighbouring output of the N outputs by a constant phase difference (??). N may be equal to 2 to the power of n.