Abstract: In an optical waveguide device, absorption of light by a control electrode is suppressed and peeling of a dielectric layer is prevented. An optical waveguide device of the present invention includes a substrate on which a rib type optical waveguide is formed, and a control electrode disposed next to the optical waveguide, in which an end portion of the control electrode facing to the optical waveguide is positioned in a first recess portion of the substrate, a dielectric layer that covers the optical waveguide is provided, a second recess portion that is further recessed from a shallowest position of the first recess portion is provided in a part of the first recess portion at a base part of the optical waveguide, and the dielectric layer is disposed in the second recess portion.

Abstract: An optical radiation modulation device that includes two or more optical fibers arranged optically in parallel, a first coupler coupled with the optical fibers, and a second coupler coupled with the optical fibers. The first coupler is operable to receive a single-wavelength optical radiation and to provide or distribute the single-wavelength optical radiation to the optical fibers. The second coupler is operable to receive optical radiations outputted by the optical fibers. The optical fibers include, at least: a first optical fiber operable to modulate the single-wavelength optical radiation provided or distributed to the first optical fiber to generate a multi-wavelength optical radiation for output to the second coupler; and a second optical fiber.

Abstract: An object of the present invention is to provide an optical waveguide device that suppresses optical absorption even in a case where an electrode clearance is narrow. An optical waveguide device of the present invention includes a substrate 1 on which an optical waveguide 10 is formed, and a control electrode 3 disposed close to the optical waveguide on the substrate, in which the optical waveguide 10 is a protruding optical waveguide, and a shape of a side surface of the control electrode 3 facing the optical waveguide includes an inclined surface 32 having a predetermined angle from the substrate and a curved surface 33 that is contiguous to the inclined surface and that forms a curved recess.

Abstract: An optical pulse train generation device includes a storage unit and a characteristic setting unit. The storage unit stores a plurality of phase patterns in advance. The plurality of phase patterns are phase patterns for forming, from a first optical pulse, an optical pulse train including a plurality of second optical pulses having time differences therebetween and having different center wavelengths. Between the plurality of phase patterns, one or both of a first characteristic regarding the first optical pulse and a second characteristic regarding the optical pulse train are different. The characteristic setting unit sets the first characteristic and the second characteristic in response to the user's input. The storage unit stores the plurality of phase patterns in association with the first characteristic and the second characteristic. A spatial light modulator displays a phase pattern corresponding to the first characteristic and the second characteristic set by the characteristic setting unit.

Abstract: The present invention relates to an electrically tunable photonic resonator device for a component having a fast and flat actuation response. The photonic resonator device includes at least one optical waveguide with an optical interface for coupling in laser light. The photonic resonator device includes at least one optical resonator including a waveguide made of an optical resonator material. A laser light coupled via the optical waveguide is coupled into at least one optical resonator. The photonic resonator device includes at least one piezo actuator to apply mechanical stress onto the optical resonator. The optical resonator, the piezo actuator, and the optical waveguide are monolithically integrated on a common substrate of the photonic resonator device. The photonic resonator device includes a mechanical mode suppression means configured to attenuate one or more mechanical modes of oscillation caused by an AC operation of the piezo actuator.

Abstract: A third-harmonic generation method includes frequency-quadrupling a fundamental optical beam via cascaded second-harmonic generation to yield a fourth-harmonic optical beam. The method also includes down-converting the fourth-harmonic optical beam to yield a third-harmonic optical beam. A third harmonic generator includes a monolithic optical element having nonzero quadratic electric susceptibility to (i) frequency-quadruple a fundamental optical beam via cascaded second-harmonic generation, and (ii) down-convert a fourth-harmonic optical beam to yield a third-harmonic optical beam.

Abstract: Optical transceiver architecture utilizing micro-ring modulators and micro-ring resonators configured to route resonant wavelengths of light injected into each micro-ring resonator's input port and through port to that micro-ring resonator's drop port and add port, respectively. The micro-ring resonators drop two distinct streams of data modulated onto the same optical wavelength, or two wavelengths separated by an integer number of free spectral ranges coupled into the micro-ring resonators in two different directions.

Abstract: A waveguide is provided for transmitting electromagnetic waves, in particular for transmitting image information, from a proximal end to a distal end, along a transport direction running between the ends and a via a cross-section running transversely to the transport direction. The waveguide has a plurality of structural elements, wherein at least two different types of structural elements have a first type with a first refractive index and a second type with a second refractive index. Each of the structural dements extends along the transport direction and over a part of the cross-section of the waveguide such that a plurality of cross-sectional regions are defined in the cross-section of the waveguide, each cross-sectional region corresponding to the cross-section of an individual structural element.

Abstract: A laser amplification device includes an amplification unit and a phase adjustment unit; the amplification unit includes a signal light source, an excitation light source, and a nonlinear optical crystal; the nonlinear optical crystal has a plurality of spatially different crystal portions; the signal light source, the excitation light source, and the nonlinear optical crystal are arranged such that signal light and excitation light are simultaneously incident on the plurality of crystal portions and that the elements of at least one of a set of the angles of incidence between the crystal axes of the plurality of crystal portions and the signal light and a set of the angles of incidence between the crystal axes of the plurality of crystal portions and the excitation light are different.

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: 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: 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.