191 results about "Slot-waveguide" patented technology

Systems and methods for chip-integrated label-free detection and absorption spectroscopy with high throughput, sensitivity, and specificity are disclosed. The invention comprises packaged chips for multiplexing photonic crystal waveguide and photonic crystal slot waveguide devices. Other embodiments are described and claimed.

The invention discloses a polarization rotator based on an asymmetric vertical slot waveguide, which comprises an incident end waveguide used for leading in external incident light, a mode conversion waveguide used for converting TE/TM (Transverse Electric/Transverse Magnetic) mode incident light into TM/TE (Transverse Magnetic/Transverse Electric) mode emergent light, and an emergent end waveguide used for leading out a TM/TE mode, wherein the incident end waveguide, the mode conversion waveguide and the emergent end waveguide are asymmetric slot waveguides. With the adoption of the structure, the symmetry of a material is broken longitudinally, and the symmetry of a geometrical dimension is broken transversely, so that intrinsic modes of specific waveguides are mixed modes; the two intrinsic mixed modes can be converted mutually; and mutual conversion between a TE mode and a TM mode can be achieved finally. The polarization rotator can convert a TE/TM mode into the TM/TE mode by once etching, so that the manufacturing difficulty of a device is reduced greatly.

The invention relates to a micro-ring waveguide optical device capable of realizing all-optical signal processing by utilizing a high-nonlinearity effect, and aims to overcome the defect that nonlinear coefficients are insufficient when a conventional micro ring performs all-optical signal processing. The provided micro-ring waveguide optical device comprises a straight waveguide and a parallel growth micro ring on a substrate, wherein the micro ring is an annular resonant cavity; the ridge waveguide part of the micro ring adopts a parallel slot structure instead of a single ridge waveguide structure; and the straight waveguide is coupled with the micro ring. According to the micro-ring waveguide optical device, one parallel slot micro-ring waveguide structure is innovated; and when light is coupled into the parallel slot micro-ring waveguide structure, the slot waveguide structure can well limit a light field, the light intensity of resonance light is enhanced greatly due to the resonance effect of the micro ring, accordingly, various nonlinear effects of the micro ring are enhanced, the threshold value is reduced, the efficiency is improved, and the device can be applied to the all-optical signal processing fields such as optical frequency comb, wavelength conversion, logic gate, format conversion and the like.

A low-loss, low-profile dual-polarization slotted waveguide antenna includes one or more waveguides having a characteristic wavelength. Radiation apertures comprised of a waveguide slot pairs are formed in each or the waveguides of the antenna. Each waveguide slot pair includes a first waveguide slot and a second waveguide slot which are configured for inducing a circularly polarized (CP) radiated field in the waveguide. The waveguide slots of each waveguide slot pair may be generally crescent-shaped and spaced a distance of at least approximately one-fourth of the characteristic wavelength from each other. The waveguide slots may further be positioned for allowing the antenna to receive and/or radiate both left-hand and right-hand circularly polarized fields (LHCP and RHCP) and for providing control of the sense of a circularly polarized (CP) field radiated by the antenna by changing the direction of incidence of an electromagnetic source wave propagated in the waveguide.

A flat scanning antenna comprises at least one slotted waveguide array comprising two dielectric substrates, one superposed above the other. The two substrates comprise the same number of waveguides, which are in mutual correspondence and communicate between them, pairwise, via corresponding coupling slots. Each waveguide of the upper substrate further includes a plurality of radiating slots, all the radiating slots being mutually parallel and oriented in the same direction and each waveguide of the lower substrate includes an individual internal supply circuit comprising an individual phase-shift/amplification electronic circuit.

The invention discloses a one-dimensional waveguide narrow slot antenna capable of scanning in order to solve the problems that an existing waveguide narrow slot array antenna unit is not even in radiation, difficult to achieve beam scanning in the single frequency condition, not high in power capacity and the like. The one-dimensional waveguide narrow slot antenna capable of scanning is composed of a rectangular slot waveguide, a sliding panel and a stepping motor. The rectangular slot waveguide is composed of a first narrow wall, a second narrow wall and two wide walls, one end of the rectangular slot waveguide is provided with a microwave feed-in port, the other end of the rectangular slot waveguide is connected with a matched load, n slots are formed in the first narrow wall of the rectangular slot waveguide, and the stepping motor is fixedly arranged on the second narrow wall. The sliding panel is embedded between the first narrow wall and the second narrow wall, and the sliding panel can slide in the direction perpendicular to the second narrow wall of the waveguide. According to the one-dimensional waveguide narrow slot antenna cable of scanning, each slot unit basically achieves even radiation, the purpose that the microwave beams scan in the one-dimensional direction under the single frequency working condition is achieved, large-scale array arranging capacity and high-power microwave field application potential are achieved, the structure is simple, and operating is convenient.

The invention discloses an optical fiber and silicon waveguide coupling structure based on polymer waveguides and a manufacturing method of the optical fiber and silicon waveguide coupling structure. The optical fiber and silicon waveguide coupling structure based on the polymer waveguides comprises an SOI wafer and an optical fiber arranged on the SOI wafer, the polymer straight waveguide and the polymer tapered waveguide are arranged on a buried oxide layer of the SOI wafer in sequence from right to left, the narrower end of the polymer tapered waveguide is connected with the polymer straight waveguide, and the wider end of the polymer tapered waveguide is aligned with a fiber core of the optical fiber; the silicon waveguide is arranged on upper layer silicon, the left end of the silicon waveguide is a back taper structure with a gradually changing width, the right end of the silicon waveguide is of a straight silicon waveguide back taper structure, part of the straight silicon waveguide wrapped in the polymer straight waveguide, and other parts of the straight silicon waveguide is covered with a silicon dioxide covering layer; a V-shaped groove is formed in the top surface of the left end of the SOI wafer, the silicon dioxide covering layer, the upper layer silicon and the buried oxide layer sequentially penetrate through the V-shaped groove in the depth direction, and the bottom end of the V-shaped groove is located at substrate silicon; the optical fiber is fixed in the V-shaped groove. The optical fiber and silicon waveguide coupling structure based on the polymer waveguides and the manufacturing method of the optical fiber and silicon waveguide coupling structure not only improve coupling efficiency, reduce process complexity and guarantee the reliability of the optical fiber coupling structure.

The invention discloses an amplitude-phase weighed narrow waveguide slot array antenna, comprising a waveguide narrow radiating array surface (1) and an integrated amplitude-phase weighed shaping waveguide narrow feed network (2), wherein the range of the waveguide narrow radiating array surface (1) comprises 6-14 narrow slotting waveguides (11); the azimuth direction of the waveguide narrow radiating array surface (1) comprises 2-100 radiating slots (12); and the integrated amplitude-phase weighed shaping waveguide narrow feed network (2) comprises a feed transmission waveguide (23), amplitude-phase simultaneous weighing feed coupling slots (24) and an excessive connecting waveguide (26). For the radiating array surface of the antenna, slots which are inclined alternately are arranged at a waveguide narrow edge for in-phase radiation, and the feed network realizes different amplitude-phase allocations by slots which are inclined in the same direction at the waveguide narrow edge, thus reducing the structural complexity of the feed network and the transmission loss effectively and decreasing the processing difficulty and processing cost of the antenna system.

Methods and systems for a label-free on-chip optical absorption spectrometer consisting of a photonic crystal slot waveguide are disclosed. The invention comprises an on-chip integrated optical absorption spectroscopy device that combines the slow light effect in photonic crystal waveguide and optical field enhancement in a slot waveguide and enables detection and identification of multiple analytes to be performed simultaneously using optical absorption techniques leading to a device for chemical and biological sensing, trace detection, and identification via unique analyte absorption spectral signatures. Other embodiments are described and claimed.

Apparatuses for communication or sensing are disclosed, the apparatuses comprising a substrate; a bottom cladding disposed on the substrate; a device layer disposed on the bottom cladding, wherein the device layer comprises: two substantially parallel rails extending from an input side to an output side of the device layer and configured to form a slot between the two substantially parallel rails, wherein each of the two substantially parallel rails comprises an inner edge adjacent to the slot and an outer edge opposite the slot; and one or more teeth coupled to each of the two substantially parallel rails; and a top cladding disposed onto the device layer and bottom cladding; wherein the bottom cladding, the device layer, and the top cladding are configured to support at least one optical guided mode. Other embodiments are described and claimed.

The invention discloses a multimode interference biological chemical sensor based on silicon slot waveguides, which is characterized by comprising an input waveguide (1), two output waveguides, namely, a first output waveguide (3) and a second output waveguide (4), and a multimode interference waveguide (5), wherein the input waveguide (1) is used for inputting optical signals, the input waveguide (1) is connected with the first output waveguide (3) and the second waveguide (4) through the multimode interference waveguide (5), the multimode interference waveguide (5) is tapered, single wavelength optical signals are input through the input waveguide (1) and subjected to multimode interference in an area of the multimode interference waveguide (5), input lights are subjected to self-imaging length regeneration on the basis of the self-imaging effect of multimode interference, and the self-imaging length is selected as the length of the sensor. The multimode interference biological chemical sensor based on silicon slot waveguides has the advantages of compact structure, insensitive polarization, high bandwidth, good fabrication tolerance and large working range.

The mode transforming structure includes a first waveguide structure. A slot waveguide region is coupled to the first waveguide structure. The slot waveguide region includes one or more complementary tapered pairs so near lossless transforming between the first waveguide structure and the slot waveguide region occurs so as to allow optical modes to be transferred between the first waveguide and the slot waveguide region.

The invention discloses a dual-frequency common-caliber waveguide slot waveguide antenna and a design method thereof, and an antenna array. The dual-frequency common-caliber waveguide slot waveguide antenna comprises a radiation port, a radiation sidewall, a first waveguide cavity, a second waveguide cavity, a Ku-band input port and a Ka-band input port; the radiation port, the radiation sidewall,the first waveguide cavity, the second waveguide cavity and the Ka-band input port are sequentially disposed from top to bottom, and the Ku-band input port is disposed on the first waveguide cavity.The dual-frequency common-caliber waveguide slot waveguide antenna and a design method thereof, and the antenna array are high in efficiency, high in gain, easy to process, dual-band and large in distance.

An onboard directional plane antenna comprises at least one array of radiating-slot waveguides comprising an alternating succession of three superposed metallic plates and of two dielectric substrates. The two substrates each comprise at least four adjacent waveguides, corresponding and communicating with one another pairwise by way of coupling slots. Each waveguide of the upper substrate furthermore comprises a plurality of radiating slots passing through the upper metallic plate, all the radiating slots of one and the same waveguide being parallel to one another and oriented in one and the same direction, the radiating slots of two adjacent waveguides being disposed in chevrons. Each waveguide of the lower substrate comprises an internal individual feed circuit comprising an individual electronic circuit for phase shifting and amplification.

The invention relates to a radio frequency superconducting cavity with a slot waveguide structure for a superconducting accelerator, which belongs to the technical field of accelerator physics. The radio frequency superconducting cavity comprises multiple oval spherical cavities, bundle tubes and alary slit waveguides, wherein the multiple oval spherical cavities are connected with one another in series; both ends of the multiple oval spherical cavities which are connected with one another are the bundle tubes; each oval spherical cavity and the outer walls of the bundle tubes at the two ends are uniformly distributed with multiple slits along the circumferential direction; and the slits of each oval spherical cavity and the slits of the bundle tubes at the two ends are connected by the corresponding alary slit waveguides. The radio frequency superconducting cavity of the invention has super-high attenuation of a dipole module and a quadrupole module, so that ERL of GeV magnitude reaches the average current intensity of ampere magnitude; the radio frequency superconducting cavity can reach a BBU threshold value over the ampere magnitude; the radio frequency superconducting cavity can be formed by punching at one time due to no weld joint in a high electric field; therefore, machining difficulty is greatly reduced, time and cost for product production are reduced, the products are suitable for mass production, and the production cost is reduced.

The invention discloses a low-crosstalk organic polymer waveguide switch and relates to a low-crosstalk termooptical waveguide switch device. All waveguide structures are embedded in a cladding (18). The input end of a Mach-Zehnder interference waveguide structure (12) is connected with the output end of an input waveguide (11). Two output ends of the Mach-Zehnder interference waveguide structure (12) are connected with the input end of an output waveguide (13) and the input end of an output waveguide (14) respectively. The top of the Mach-Zehnder interference waveguide structure (12) is provided with a first metal membrane thermode (15). The top of the output waveguide (13) is provided with a second metal membrane thermode (16). The top of the output waveguide (14) is provided with a third metal membrane thermode (17). The device controls the first metal membrane thermode (15) and the second metal membrane thermode (16) through current respectively or controls the first metal membrane thermode (15) and the third metal membrane thermode (17) through current respectively to realize a low-crosstalk optical switch function.

The invention provides a slotted waveguide antenna that can be laid in an existing space, effectively isolates signals which cannot reach isolation requirements and separately transmits the signals, and also provides a signal transmission device and a signal continuous transmission system that both comprise the slotted waveguide antenna. The slotted waveguide antenna is characterized by comprising at least one slotted waveguide tube for transmitting electromagnetic wave signals, wherein the slotted waveguide tube at least comprises a first pipeline and a second pipeline parallel to each other, the surface of each of the first pipeline and the second pipeline is equipped with multiple slots that enable the electromagnetic wave signals to be transmitted between the inside of each pipeline and the outside of each pipeline, and the first pipeline and the second pipeline are respectively used for transmitting two types of electromagnetic wave signals, wherein the frequency interval between the two types of electromagnetic wave signals cannot reach preset isolation requirements.

The invention belongs to a waveguide technology and in particular relates to a surface plasmon polariton waveguide. The surface plasmon polariton waveguide comprises a substrate layer, two high-refractive-index dielectric layers, two low-refractive-index dielectric layers and a metal layer, wherein the two high-refractive-index dielectric layers, the two low-refractive-index dielectric layers and the metal layer are arranged above the substrate layer to form a lamination structure which consists of a first high-refractive-index dielectric, a first low-refractive-index dielectric, metal, a second low-refractive-index dielectric and a second high-refractive-index dielectric; and the lamination structure is horizontally placed or vertically laminated on the substrate layer. The surface plasmon polariton waveguide has the advantages that a surface plasmon polariton mode and the conventional slot waveguide mode are mixed; on the basis of the conventional slot waveguide, a central metal layer is added, and by using a metal-dielectrics surface plasmon polariton effect, mode locality is improved; and moreover, by using a thin metal layer long-range surface plasmon polariton effect, the absorption loss of the metal is reduced, so large propagation length of over 1 mm can be obtained.