433 results about "Waveguide coupling" patented technology

The invention relates to the technical field of optoelectronics, and discloses a compact mixed optical path high-density integration method of a multi-level waveguide composite structure, which comprises the following steps: S1, preparing a multi-material layer: sequentially depositing a silicon layer, a silicon nitride layer and a lithium niobate layer, preparing the silicon layer and the silicon nitride layer through a chemical vapor deposition process, preparing the lithium niobate layer through direct current magnetron sputtering, and preparing the multi-material layer; the refractive indexes of the silicon layer, the silicon nitride layer and the lithium niobate layer meet gradient distribution; s2, designing an interlayer coupling structure: forming a gradient waveguide coupler at an interface of adjacent material layers to realize interlayer light field transmission; and S3, stress regulation and control layer integration: arranging a buffer layer with a matched thermal expansion coefficient between the silicon layer and the silicon nitride layer. According to the invention, the silicon layer, the silicon nitride layer and the lithium niobate layer are sequentially deposited, and the refractive index of each layer satisfies gradient distribution, so that the problems of large light field reflection and scattering loss and low coupling efficiency caused by the fact that most of the traditional multilayer waveguide structures adopt single material layers are solved.

Embodiments described herein are related to enabling detachable optical fiber-to-waveguide coupling. A system can include a first connection component including a waveguide and a mirror formed on a base structure, the base structure including at least one photonic integrated circuit (PIC) formed on a substrate, and a detachable second connection component coupled to an optical fiber. The detachable second connection component is configured to mate with the first connection component to enable optical signal coupling between the optical fiber and the waveguide. The mirror is configured to at least one of: reflect a first optical signal received from the waveguide to the optical fiber, or reflect a second optical signal received from the optical fiber to the waveguide.

The various embodiments described herein include methods, devices, and systems for detecting photons. As described herein, superconducting photodetectors may be coupled with a waveguide such that reflection is reduced / minimized. In one aspect, an optical circuit includes an optical waveguide and a plurality of photodetectors coupled to the optical waveguide, adjacent photodetectors of the plurality of photodetectors being spaced to meet one or more preset destructive interference criteria.

The present invention provides an optical waveguide coupler (1) comprising a crystalline substrate (2) of a (100) type having a top surface (2a) and a (100) crystallographic plane (2100), wherein the crystalline substrate (2) comprises: a V-groove (3) extending in a Z-direction (Z) in a projection onto the top surface (2a), wherein the Z-direction (Z) lies within a 〈110〉 crystal plane (2110) of the crystalline substrate (2), wherein the top surface (2a) and a 〈100〉 crystal plane (2100) of the crystalline substrate (2) form a first angle (α1) in an X / Y plane (XY) perpendicular to the Z-direction (Z), and an optical waveguide arranged on the top surface (2a) of the crystalline substrate (2). (4), wherein the optical waveguide (4) extends along the Z-direction (Z) in a projection to the top side, wherein the V-groove (3) and the optical waveguide (4) are designed such that,When an optical fiber (5) having a predetermined size and a fiber core (51) and a fiber tip (52) is inserted into the V-groove (3) such that a distance between an outer end (42) of the waveguide core (4) and the fiber tip (52) is less than a predetermined distance (d), the fiber core (51) is aligned with the waveguide core (41) such that a displacement of the fiber core (51) and the waveguide core (41) is less than a predetermined displacement. Furthermore, the present invention provides a method for manufacturing an optical fiber coupler (1).

The invention discloses an optical detector, an optical receiving system, an optical detection method and a chip, and belongs to the field of optical communication. The optical detector comprises a micro-ring detector and N micro-ring resonant cavities which are sequentially arranged and coupled, the first micro-ring resonant cavity is coupled with the waveguide, the micro-ring detector is coupled with the Nth micro-ring resonant cavity, and a first coupling coefficient between the waveguide and the first micro-ring resonant cavity is not smaller than a second coupling coefficient between the micro-ring detector and the Nth micro-ring resonant cavity; and the micro-ring detector is used for generating a first light current based on the target light signal, the first light current is used for detecting the intensity of the target light signal, and the target light signal is obtained by filtering the initial light signal transmitted in the waveguide through the micro-ring detector and the N micro-ring resonant cavities. The optical detector provided by the invention is higher in isolation degree.

A system for wavelength-accurate conversion includes a light source configured to pump a first color laser light and a device configured for Kerr-nonlinear wavelength conversion of the first color laser light to a signal laser light and an idler laser light, the device includes: a waveguide configured to couple to the light source; and a microring resonator coupled to the light source via the waveguide. The microring resonator configured to generate the signal laser light and the idler laser light. The microring resonator including a plurality of projections. A number of the projections is linked to a targeted output wavelength for at least one of the signal laser light or the idler laser light, and a refractive index grating strength of each projection of the plurality of projections is linked to a frequency mismatch between modes when comparing to a reference device lacking the plurality of projections.

A bolometer-optical microresonator infrared sensor includes a frame; at least two legs mechanically supporting an island to the frame, with a ridge patterned into each leg forming a waveguide; a microresonator located on the island including a closed loop ridge waveguide; an absorber on the island separated from the microresonator; a waveguide coupler on the island connecting the waveguide on each leg to the microresonator; a waveguide transition on the frame at an end of each leg transmitting light between the waveguide on the leg and a waveguide supported by a substrate; and an edge coupler at an end of the substrate-supported waveguide.

Systems, devices, and methods are provided for built-in redundancy in optical devices that output an optical signal, for example, to photonic integrated circuits. The device and systems disclosed herein include a plurality of optical sources coupled to a plurality of waveguides. Each adjacent pair of the plurality of waveguides are coupled to an optical switching devices that comprises an interferometer having a first branch comprising a phase-shift mechanism coupled to one waveguide of the pair of waveguides. A voltage bias can be applied to the phase-shift mechanisms to tune a respective phase difference and direct an optical signal from any of the plurality of optical sources to the output end of the optical device. According to various examples disclosed herein, the phase-shift mechanisms comprises metal oxide semiconductor (MOS) capacitors.

The invention discloses a distributed aperture OPA array co-phase system based on a phase measurement chip, and belongs to the field of laser radars, the output end of a laser generating device is connected with an optical fiber beam splitter, output laser is divided into two paths, one path is a main light path, and the other path is a reference light path; after being amplified by the optical fiber amplifier, the main optical path laser is equally divided into N paths by the optical fiber beam splitter, and each path of sub light beam enters the integrated optical chip through the optical fiber-waveguide coupler and is emitted through the OPA module; the reference light path laser enters the phase identification twin chip through the optical fiber-waveguide coupler; and an on-chip interference result is fed back to the phase measurement compensation module, and active measurement and real-time correction are performed on a phase error by adopting an in-waveguide co-phase synthesis technology. According to the invention, a plurality of main laser non-common-path phase error measurement methods are used, and the overall emission aperture, emission power and detection distance of the laser phased array are greatly improved in a multi-aperture cooperative coherence mode.

An electronic device may include a waveguide that directs light to an eye box. The waveguide may include a diffractive grating structure. A projector may generate image light coupled into the waveguide by a first input coupler. A light source may generate supplemental light coupled into the waveguide by a second input coupler. The diffractive grating structure may couple the image light out of the waveguide within a central region of the field of view (FOV) of an eye box and may couple the supplemental light out of the waveguide at a location within a peripheral region of the FOV. The location may be outside of the central region by at least 10 degrees. A gaze tracking sensor may estimate a user's gaze direction at the eye box. A processor may wake or power down the projector responsive to the gaze direction overlapping the location for a predetermined time period.

A device useful as a switch including an input waveguide coupled to an output waveguide; a first diode circuit integrated with the input waveguide at a first termination; a second diode circuit integrated with the output waveguide at a second termination; and wherein the biasing the diode circuits switches the switch between an off state and an on state and achieves high isolation in the off state by absorbing input power in, reflecting the input power from, and frequency multiplying the input power using the diodes in the diodes circuits when the input power is received from the input waveguide. In one embodiment, the switch is a tunable, solid-state SPST switch for Gband radar applications.

A display structure (1000), a display device, and a vehicle are disclosed. The display structure (1000) comprises a waveguide (1100); an in-coupling structure (1200) configured to in-couple a set of in-coupled beams (1021); a diffractive exit pupil expansion structure (1300) configured to receive and diffract the set of in-coupled beams (1021) to form a first set of guided beams (1031) and a second set of guided beams (1032); and a diffractive out-coupling structure (1400) configured to receive from the exit pupil expansion structure (1300) a first diffracted set of beams (1041) and a second diffracted set of beams (1042) and to out-couple light from the first diffracted set of beams (1041) and from the second diffracted set of beams (1042).

For improved Ku band communications, an antenna system includes a planar antenna surface, at least one waveguide feed network, and a waveguide. The planar antenna surface is coupled to at least one port. The at least one waveguide feed network includes an H plane junction splitter and at least two E plane junction splitters. The H plane junction splitter is disposed on a channel septum in a channel. A splitter axis of the channel septum and the H plane junction splitter is rotated about a P axis. The at least two E plane junction splitters are each disposed on septum and coupled to the H plane junction splitter via the channel. The waveguide is coupled to the waveguide feed network.

The present application relates to a ring resonator comprising: a straight waveguide; and the runway type micro ring comprises an arc-shaped coupling section and a first straight arm connected with the arc-shaped coupling section, and the arc-shaped coupling section is coupled with the straight waveguide. Through the arrangement of the runway type micro-ring coupled with the straight waveguide, the perimeter of the annular waveguide can be increased while the communication performance index of the micro-ring is not affected, namely, the loop loss of the micro-ring is reduced, and the technical problem that the insertion loss is increased due to the increase of a transmission path due to the too large radius of the micro-ring in the related technology is solved.

The invention relates to the technical field of semiconductor devices, in particular to a semiconductor laser device, which comprises a substrate; the ridge waveguide array comprises a fundamental mode waveguide array and a coupling waveguide array, the fundamental mode waveguide array comprises N fundamental mode waveguides, the coupling waveguide array comprises a plurality of coupling waveguides, and at least one coupling waveguide is provided with an optical loss structure; an electrical isolation structure; the coupling waveguide array is located on one side of the fundamental mode waveguide array, and the number of the coupling waveguides is N-1; or, the two coupling waveguide arrays are located on the two opposite sides of the fundamental mode waveguide array respectively, and the number of the coupling waveguides in each coupling waveguide array is N-1; or, the two coupling waveguide arrays are located on the two opposite sides of the fundamental mode waveguide array respectively, and the total number of the coupling waveguides of the two coupling waveguide arrays is N-1. The semiconductor laser device is at least beneficial to realizing high-power output of the fundamental mode of the semiconductor laser device.

The invention relates to an antenna device comprising a quad-ridged waveguide, an open end of which is configured to act as a radiating aperture, and an orthomode transducer, OMT, configured to couple the quad-ridged waveguide to two feed structures.

A radar apparatus. The radar apparatus includes a printed circuit board and a signal generating circuit which is disposed at least indirectly on the printed circuit board, is electrically coupled to the printed circuit board, and is configured to generate a radar signal. The radar apparatus additionally includes a waveguide antenna device which is disposed at least indirectly on the printed circuit board and is at least partly formed on the basis of injection-molded plastic. The radar apparatus additionally includes a waveguide coupling device, wherein the signal generating circuit is disposed on or in the waveguide coupling device, and the waveguide coupling device is configured to couple the radar signal generated by the signal generating circuit into the waveguide antenna device.

The invention discloses an optical chip, a photoelectric conversion module, a photoelectric sealing chip and optical communication equipment, which are used for reducing the coupling insertion loss of the optical chip and improving the mechanical strength of the optical chip. The optical chip comprises a substrate, a filling layer, a modulation optical waveguide, an electrode, a transmission optical waveguide and at least one optical port optical waveguide, the filling layer is arranged on the surface of the substrate, and the distance between the modulation optical waveguide and the surface of the substrate is smaller than the distance between the optical port optical waveguide and the surface of the substrate in the direction perpendicular to the surface of the substrate. The distance between the transmission optical waveguide and the surface of the substrate is smaller than the distance between the optical port optical waveguide and the surface of the substrate. The electrode is used for forming an electric field, the electric field is used for modulating an optical signal in the modulation optical waveguide to obtain a modulation optical signal, the modulation optical waveguide is used for coupling the modulation optical signal to the transmission optical waveguide, and the transmission optical waveguide is used for coupling the modulation optical signal to the at least one optical port optical waveguide; the transmission optical waveguide and the at least one optical port optical waveguide are used for emitting modulated optical signals.

A waveguide to transmission line coupler is provided. The waveguide can be capable of guiding electromagnetic energy and can have a plurality of coupling sets along the waveguide. The coupling set can include a non-resonant coupling aperture capable of coupling said electromagnetic energy from the waveguide to at least one output transmission line and a tuning element in the waveguide proximate to said non-resonant coupling aperture thereto, capable of tuning out residual shunt susceptance corresponding to the electromagnetic energy coupled by said non-resonant coupling aperture.

An electronic device may include a display that generates light for an optical system that redirects the light towards an eye box. The optical system may include a waveguide, a non-diffractive input coupler, a cross coupler, and an output coupler. The cross coupler may expand the light in a first direction. The cross coupler may perform an even number of diffractions on the light and may couple the light back into the waveguide at an angle suitable for total internal reflection. The output coupler may expand the light in a second direction while coupling the light out of the waveguide. The cross coupler may include surface relief gratings or holographic gratings embedded within the waveguide or formed in a separate substrate. The optical system may direct the light towards the eye box without chromatic dispersion and while supporting an expanded field of view and optical bandwidth.

A hard disk drive (HDD) includes a heat-assisted magnetic recording (HAMR) head. The HAMR head includes one or more features comprising a laser device that is a heterogeneous integrated epitaxial grown GaAS laser. The laser device couples directly with a waveguide that transfers the electromagnetic radiation generated by the laser device to a near field transducer. The device includes an N-doped layer for coupling the output of the GaAs active layer to the waveguide.

The invention discloses a multi-light-source OPA co-phase system based on on-chip phase measurement, and belongs to the field of optical chips. Comprising a laser generating device, an optical fiber-waveguide coupler, an on-chip phase modulator, a directional coupler, a silicon-based optical mixer, an OPA module and a phase compensation module. The output ends of the N parallel laser generating devices are connected with the optical fiber-waveguide coupler through optical fibers and enter the chip; two adjacent light beams are split through a directional coupler, and a small part of energy enters a silicon-based optical mixer; the mixer outputs a signal to an off-chip phase compensation module, subsequent DSP processing is carried out to obtain a phase difference between two adjacent light beams, and a control signal is output to an on-chip phase modulator, so that the two adjacent light beams are subjected to phase locking; and sequentially carrying out the operation on the N paths of light beams to realize on-chip multi-light-source co-phase. By introducing the multi-light-source co-phase system, the problem of OPA power limitation caused by limited transmission power of a single waveguide is solved, and the OPA output power can be greatly improved.

The invention refers to a frequency shifter for heterodyne interferometry measurements, comprising a chip, an input waveguide configured to guide a light beam, at least four phase modulators, each being arranged to receive the light beam from the input waveguide and configured to modulate a phase of the light beam, an output combiner being arranged to let the light beams modulated by each phase modulator interfere, a first output waveguide coupled to the output combiner and configured to receive the modulated light beams constructively interfering at the output combiner, a second output waveguide coupled to the output combiner and configured to receive the modulated light beams destructively interfering at the output combiner, wherein the input waveguide, the phase modulators, the output combiner, the first output waveguide and the second output waveguide are arranged on the chip.

A waveguide structure and a manufacturing method thereof, and a photonic integrated circuit and a manufacturing method thereof are disclosed. The waveguide structure and the manufacturing method thereof include: forming a first material layer; forming a first waveguide and a second waveguide based on the first material layer, wherein the first waveguide and the second waveguide are spaced apart from each other; forming a second material layer; and forming a waveguide coupling structure based on the second material layer, wherein the waveguide coupling structure is optically coupled to the first waveguide and the second waveguide respectively, to optically connect the first waveguide and the second waveguide.

The invention provides a display device which can be applied to a head-up display device in a vehicle. The display device comprises a projection module, a waveguide coupling module, an optical waveguide and a windshield correction element. Wherein the projection module is used for projecting image light to the waveguide coupling module; the waveguide coupling module is used for coupling the image light from the projection module into the optical waveguide and compensating the color difference value of the windshield correction element. The optical waveguide is used for emitting the image light from the waveguide coupling-in module to the windshield correction element. The windshield correction element is used for adjusting the transmission angle and / or the transmission direction of the image light from the optical waveguide and emitting the adjusted image light to the windshield glass. The display device provided by the invention can compensate the chromatic aberration of the windshield correction element to achieve the purpose of improving the imaging quality.

A device for generating high optical quality (high-Q) highly twisted states of light and a method for quantitative estimating a loss at all wavelengths, includes: a waveguide configured to couple to a light source; and a microresonator coupled to the light source via the waveguide, wherein the microresonator operates in whispering gallery mode (WGM). The microresonator includes a photonic crystal ring (PhCR) configured to enable generating highly twisted states of light, and a photonic crystal grating.

The invention relates to an optical fiber ring module with high magnetic shielding performance and a manufacturing method thereof, and solves the technical problem of limited magnetic shielding performance in the prior art. The shielding device comprises a base, a shielding framework sleeving the base and a shielding bottom cover, an optical fiber ring is arranged in the shielding framework; a Y waveguide, a coupler and a temperature sensor are mounted on the base; a first-layer upper shielding cover and a first-layer lower shielding cover are respectively arranged on the outer layer to realize first-layer full magnetic shielding; a second-layer upper shielding cover, a second-layer shielding cylinder and a second-layer lower shielding cover are correspondingly connected to realize second-layer full magnetic shielding; and a third-layer shielding cover is arranged, and the third-layer shielding cover and the third-layer shielding sleeve are correspondingly connected to realize third-layer full-magnetic shielding. Wherein the first magnetic shielding layer and the third magnetic shielding layer are made of magnetic conductive materials so as to shield interference of a low-frequency magnetic field, the middle second magnetic shielding layer is made of conductive materials so as to shield interference of a high-frequency magnetic field, and the magnetic shielding performance is improved through three-layer full magnetic shielding coating.

An integrated photonic device independently directs each channel of a multiplexed input optical signal received from a corresponding one of N input port to one of N output ports, each multiplexed input optical signal including N channels. The device includes: N input waveguides; secondary waveguides; wavelength-selective filters, each: i) including a ring resonator, ii) being optically coupled to a corresponding one of the N input waveguides and a corresponding one of the secondary waveguides, and iii) being switchable between a first state in which an optical signal in a corresponding one of the N channels is coupled from the corresponding input waveguide into the corresponding secondary waveguide and a second state in which the optical signal in the corresponding one of the N channels is not coupled into the corresponding secondary waveguide; N multi-wavelength mixers; and N output waveguides.

The application provides a leaky-wave antenna array based on a multimode substrate integrated waveguide coupler, relates to the technical fields of wireless communication and radar, and comprises a dielectric substrate, a multimode substrate integrated waveguide coupler and two leaky-wave antenna units. The multimode substrate integrated waveguide coupler is integrated on the dielectric substrate and is configured to excite modes and modes of the substrate integrated waveguide respectively in the same frequency range, generate even-mode signals with equal amplitude and in-phase and odd-mode signals with equal amplitude and opposite phase. The two leaky-wave antenna units are symmetrically arranged on the two sides of the upper surface metal layer of the dielectric substrate and are connected with two output ports of the multimode substrate integrated waveguide coupler respectively. The two leaky-wave antenna units are configured to radiate a wave beam and a difference wave beam in response to the even-mode signals and the odd-mode signals. The application solves the problem of low measurement accuracy of a traditional single-pulse antenna, has the technical effects of simplifying the design of a feed network, improving radiation performance and thus improving measurement accuracy.

The invention discloses a waveguide structure for generating complex coupling strength and a design method thereof, and belongs to the technical field of integrated optoelectronic devices, and the method comprises the steps: designing a waveguide structure meeting the requirement of a complex coupling coefficient according to an expression of an equivalent coupling coefficient caused by an artificial standard field of a double-waveguide coupling system transmitted along a z direction; and according to the obtained waveguide function meeting the complex coupling coefficient requirement, constructing different waveguide structures, and carrying out modeling simulation on the constructed different waveguide structures. Artificial standard field modulation is introduced into a waveguide structure, and a direct coupling coefficient between optical waveguides is expanded from a real number domain to a complex number domain; the artificial standard field is used for carrying out geometric structure modulation on the optical system so as to influence photon transmission in the optical system; a proper optical waveguide structure is designed by using an equivalent coupling coefficient calculation formula, and a complex coupling coefficient is obtained, so that complex photon state conversion and light intensity regulation and control in the optical waveguide array can be realized by using the complex coupling coefficient.