261 results about "Wave coupling" patented technology

Multi-layer frequency selective panel includes a group of frequency selective surfaces arranged in a stack. A first frequency selective surface includes a first group of slot elements, and a second frequency selective surface includes a second group of slot elements. The first frequency selective surface and the second frequency selective surface are formed of a conductive metal layer. The first frequency selective surface and the second frequency selective surface are positioned a predetermined distance apart in parallel planes. The second frequency selective surface is disposed in an evanescent field region of the first frequency selective surface.

Apparatus using mechanically-actuated evanascent wave coupling. At least a portion of an optical waveguide is integrated onto a substrate, and an optically active element is physically moved relatively to each other, with the result that propagation parameters for the waveguide are substantially altered. The optically active element may be a resonator or another waveguide. Altered propagation parameters can be used to cause an optical wave to be transformed in response to an electromagnetic signal. Physical parts of the apparatus can vary widely in both size and tolerance. The optically active element is mechanically actuated relative to a position of the optical waveguide.

The invention provides a dentiform embedded planar waveguide optical device which comprises an image light source, a collimating lens, a coupling input surface, a planar waveguide substrate and a micro dentiform structure, wherein the image light source is used for emitting display optical waves for displaying a required image, the collimating lens is used for collimating the optical waves emitted by the light source, the coupling input surface is used for coupling the collimated optical waves into a planar waveguide, the planar waveguide substrate is used for performing reflecting propagating on the coupled optical waves to form total reflection optical waves, and the micro dentiform structure is used for outputting the total reflection optical waves in a coupled manner. The dentiform embedded planar waveguide optical device has characteristics of being simple in processing process, easy to realize, light in weight, compact in structure, flexible in vision field increase and high in optical wave coupling efficiency, not only can be used for wearable display, but also can be used for the application fields such as extension uniform illumination, naked eye 3D display and mobile screen display.

A plurality of multi-cavity laser diode chips, each having a plurality of light emitting points, are fixed side by side and form a laser diode array.

The invention discloses a wavelength-division time-division mixed multiplexing passive optical network system, which at least comprises an optical line terminal, an optical distribution network and a plurality of optical network units. The optical line terminal is used to send downlink optical signal wave bands of a plurality of services, make multiplexing wave coupling to the optical signal wave bands of the plurality of services, then allow the optical signal wave bands to enter the same single fiber and transmit the optical signal wave bands to the optical distribution network; the optical distribution network is used to demultiplex an optical signal which is received from the optical line terminal and wave-coupled, then makes multi-level selective download and transparent transmission to one or a plurality of optical signals after the demultiplexing, and makes power division of one or the plurality of demultiplexed optical signals to the optical network units; the optical network units are used to receive light signals of the plurality of services downloaded by the optical distribution network through a coupling fiber, and logically processes the optical signals. The wavelength-division time-division mixed multiplexing passive optical network system has the advantages of large single-fiber access capacity, low cost of network construction, easy operation maintenance and upgrade and so on.

The invention relates to a monolithic phase-locked surface-emitting distributed feedback semiconductor laser array, in particular to a new semiconductor laser array phase-locked structure solving the problems of monolithic incapability and difficult mounting and debugging of a traditional external coupling (Talbot outer cavity) phase-locked technology and the problem of a traditional internal coupling (leakage wave coupling) phase-locked technology that the light extraction efficiency is influenced by the limited width of a light extraction area. The structure comprises distribution Bragg reflectors and surface-emitting distribution feedback semiconductor laser array strips which are periodically and alternately arranged, an outer cavity feedback laser is formed by each surface-emitting distribution feedback semiconductor laser array strip and distribution Bragg reflectors at the left end and the right end, the distribution Bragg reflector at the left end provides the optical feedback of the outer cavity for the outer cavity feedback laser, the distribution Bragg reflector at the right end provides end surface reflection, and another outer cavity feedback laser is formed by the distribution Bragg reflector at the right end and the next laser array strip. The invention can be applied to the fields of military affairs, industries, medical treatment, space optical communication, and the like.

The invention provides a method and a system with a sleeping aid function and a cellphone integrated with the system. The method includes acquiring brain wave signals; analyzing the brain wave signals and judging whether sleeping needs aid if the brain wave signals stay in a first preset state; wirelessly coupling the brain wave signals in the first preset state by the electromagnetic waves of the second preset state, so that the brain wave signals of the first preset state are adjusted into brain wave signal states in a tight sleep. The system comprises a brain wave acquiring module, a processing module and an electromagnetic wave coupling module. By the method and the system, sleeping can receive better adjuvant therapy, and adverse effect such as sound and light is avoided.

The invention discloses a room-temperature adjustable sub-Terahertz wave detector and a preparation method. A graphene field effect transistor with high migration rate and adjustable carrier concentration is taken as a basic structure unit, and the field effect transistor is provided with a group of source and drain electrodes and cleavage grid electrodes of a sub-Terahertz wave coupled antenna. The detector is integrated with log-periodic antennas and corresponding feed electrodes on a sapphire substrate; the detector is provided with a graphene conducting channel transferred in an antenna distance; an aluminum oxide gate dielectric layer is arranged on the graphene conducting channel, and finally the cleavage grid electrodes and the corresponding lead electrodes are integrated on the aluminum oxide gate dielectric layer of the graphene conducting channel, so that adjustable sub-Terahertz wave detection is realized. The detector has the advantages that the detector is an adjustable lightguide-like and photovoltaic-like detector with high speed, wide band and high response; and the integration level, technical maturity and repeatability of the device lay the foundation of large-scale application of Terahertz detectors.

Coupling between non-adjacent resonators and wave propagation through the waveguide structure in distributed EM filters are reduced by forming one or more holes in one or more of the resonators (planar or folded) and by passing a conductive structure through each hole normal to the resonator. The conductive structures (vertical vias or horizontal strips) are preferably grounded, either by direct connection or capacitive coupling to one or more ground planes or by creation of a virtual ground. The holes are spaced apart from the edges of the resonator so as to minimize any interference with the current and fields concentrated at the edges of each resonator. These conductive structures narrow the effective cavity width “a_eff” for the waveguide as a whole and between non-adjacent resonators without affecting the cavity width “a” between adjacent resonators. Consequently the conductive structures have no effect on the desired coupling between adjacent resonators and the desired filter response of parallel-coupled filters while increasing the attenuation of the wave propagating in the waveguide and the attenuation of the wave coupled between non-adjacent resonators.

The embodiment of the invention relates to a matching parameter processing method and a mobile terminal. The method comprises the following steps: a transmission circuit generates an incident wave signal; a directional coupler divides the incident wave signal into two incident wave signals, wherein one incident wave signal is subjected to coupling processing to generate an incident wave coupling signal, and the other incident wave signal is transmitted to an antenna through a matching network circuit; when the impedance of the antenna is not matched with the impedance of the matching network circuit, the directional coupler receives a reflected wave signal fed back by the antenna, and the reflected wave signal is subjected to coupling processing to generate a reflected wave coupling signal; a comparator obtains comparison parameters of the reflected wave coupling signal corresponding to a preset reflection threshold value and the incident wave coupling signal according to the reflected wave coupling signal and the incident wave coupling signal; a processor determines matching parameters according to the comparison parameters; the matching network circuit regulates the impedance of the matching network circuit according to the matching parameters. As a result, the impedance of the matching network circuit is regulated dynamically, and the performance of the antenna is optimized.

An optical signal processing apparatus includes an input unit to which signal light is input; a wave coupling unit that couples the signal light from the input unit and pump light having a waveform different from that of the signal light; a first nonlinear optical medium that transmits light coupled by the wave coupling unit, the light being the signal light and the pump light; a dispersion medium that transmits the light that has been transmitted through the first nonlinear optical medium; and a second nonlinear optical medium that transmits the light that has been transmitted through the dispersion medium.

The invention discloses an optical waveguide device system which comprises display light sources, collimating lenses, an optical transmission substrate and optical wave coupling and outputting elements. The display light sources are used for providing optical waves of displayed images; the collimating lenses are used for collimating the optical waves from the light sources; the collimated optical waves enter the optical transmission substrate and are transmitted according to preset paths, transverse grooves are formed in the bottom of the optical transmission substrate, and the cross sections of the grooves in the longitudinal direction of the substrate are triangular and keep unchanged in the longitudinal directions of the grooves; the optical wave coupling and outputting elements are provided with upward triangular protrusions, the protrusions can be matched with the grooves, film layers are arranged on two side surfaces of each protrusion, and the two side surfaces with the film layers of each protrusion are adhered onto side surfaces of the corresponding grooves, so that light can be coupled and outputted to the optical transmission substrate via the side surfaces with the film layers of the protrusions, large-angle incident light rays can be selectively transmitted via the film layers, and the transmittance of small-angle incident light rays can be improved. Compared with the prior art, the optical waveguide device system has the advantages of large field of view, compact structure, portability and small size.

The invention discloses a terahertz wave detector. A gallium nitride high electron mobility transistor is used as a base structure of the terahertz wave detector. The terahertz wave detector comprises a transistor, a source-drain contact testing electrode and lead part and a terahertz wave coupling antenna; the terahertz wave coupling antenna is the special frequency coupling antenna and is used as a contact electrode to be connected with a nano-structure grid electrode of the transistor; the terahertz wave coupling antenna is positioned at two sides of a source electrode and a drain electrode of the transistor, and contact electrodes of the source electrode and the drain electrode are introduced from two antenna sections; the nano-structure grid electrode of the transistor is connected only with one side of a double-slit opening of the terahertz wave coupling antenna; the source electrode and the drain electrode of the transistor are asymmetrically arranged relative to the terahertz wave coupling antenna. According to the terahertz wave detector, the impedance of a metal electrode of the detector antenna to incident terahertz wave is in match with the input impedance of the grid electrode of the transistor, and therefore, the terahertz wave can be efficiently detected, and the detection sensitivity is high.

The invention provides a laser and silicon optical chip integrated structure and a preparation method thereof. The laser and silicon optical chip integrated structure comprises a laser chip which comprises a first waveguide, and a silicon optical chip which comprises a second waveguide, wherein the second waveguide and the first waveguide couple the light emitted by the laser chip into the siliconoptical chip in an evanescent wave coupling manner. According to the laser and silicon optical chip integrated structure prepared by the invention, the first waveguide in the laser and the second waveguide in the silicon optical chip couple the light emitted by the laser into the silicon optical chip in the evanescent wave coupling manner, compared with the end face coupling in the prior art, thecoupling mode has lower requirement for alignment accuracy in the flip-chip bonding process, and still has higher coupling efficiency even under the actual process condition that alignment has errors.

The present invention discloses a whispering gallery mode optical resonant cavity temperature sensing system. The transmitting end of the broadband light source of the system is connected with the input end of an isolator. The output end of the isolator is connected with the input end of an attenuator. An optical fiber between the output end of the attenuator and the input end of an optical fiber taper is provided with a polarization controller. A light field in the optical fiber taper enters a resonant cavity through the evanescent wave coupling manner. The light field in the cavity is in coupled output to the receiving end of a spectrograph through optical fibers. In the sensing system, the broadband light source, the isolator, the attenuator, the polarization controller, the optical fiber taper and the spectrometer are connected through optical fibers. According to the whispering gallery mode optical resonant cavity temperature sensing system, a temperature sensitive medium is introduced inside and outside a gas bubble cavity, so that the temperature sensing accuracy of the resonant cavity is improved. The system can be applied to the high-precision temperature measurement.

A speaker has a magnet structure mounted ahead of the speaker diaphragm to produce a shallow compact unit. The magnet structure defines a flux gap, and a voice coil residing in the flux gap is connected to a main diaphragm such that drive current applied to the voice coil moves the diaphragm to generate sound. The voice coil and magnet structure provide a flux gap at the rear of the magnet structure, ahead of and centered on the main diaphragm, while the magnet occupies space within the cone, freeing up space in the rear. In one embodiment, the magnet structure has an additional flux gap located at its forward end and the speaker includes an additional diaphragm driven by a coil positioned in the additional flux gap. The main diaphragm and additional diaphragm are better positioned to maintain a common sound center for enhanced spatial fidelity and different tuning techniques present a broad flat response below crossover to form a pinpoint sound source of wide angular coverage. The back wave couples directly into an enclosure, which may be a shallow, panel mount assembly. The magnet structure may possess an opening extending through the center of the structure allowing control over the acoustics through enclosure compliance or damping effects to enhance response of the system.

The invention discloses a reflection cavity mirror structure for a high-speed Q modulation and wavelength tunable type waveguide laser. The reflection cavity mirror structure for the high-speed Q modulation and wavelength tunable type waveguide laser comprises a split beam coupling structure, a big tunable optical micro-ring, a small tunable optical micro-ring and a Mach-Zehnder modulation structure, wherein the split beam coupling structure serves as an input end and a reflection output end, the two optical micro-rings are connected with the split beam coupling structure by being coupled with a first waveguide evanescent wave and a second waveguide evanescent wave respectively so that wavelength tuning can be achieved, and the two ends of the Mach-Zehnder modulation structure are connected with corresponding optical micro-ring evanescent waves respectively in a coupled mode through straight waveguide, so that wavelength tuning of the laser is achieved. According to the reflection cavity mirror structure for the high-speed Q modulation and wavelength tunable type waveguide laser, the reflectivity can be adjusted rapidly, wavelength tuning can be achieved, and the reflection cavity mirror structure can be used for constructing the high-speed Q modulation and wavelength tunable type waveguide laser. Due to the adoption of the two optical micro-rings, the range of the adjustable wavelength of the environment can be widened according to the vernier and calipers effect.

The invention provides an offshore wind resource assessment method based on a Monte Carlo operation and maintenance simulation model. The method comprises the following steps that research-stage data of an offshore wind power farm is obtained; vertical change rule and day and night change rule of the wind speed are researched; a stormy wave coupling empirical formula of the lowest square error is selected; the annual average fault rate of an aerogenerator to be used is calculated; the time limit of simulation operation, the distance between an operation center and the wind farm and the candidate parameter of approach technology are input; algorithm parameters are initialized; the wind speed, effective wave height and fault random number that satisfy distribution characteristic of each time are generated; generated faults are arranged in a fault preparation queue; preparation time for fault processing is generated, and faults prepared to be completed are arranged in a fault maintenance queue; the time window of the current data is calculated, the feasibility and validity of offshore maintenance are determined, and faults in an optimal scheme are placed in an offshore queue; generating capacity loss in the offshore queue is calculated and stored, and the faults are removed from the offshore queue; the networking electric quantity of the operation aerogenerator in the current data is calculated, and increment is implemented in the current date; and when the current data equals an operation year, the networking electric quality and the total loss of electric quantity are calculated.

The present invention provides a regional comprehensive information access system, which comprises a comprehensive information access device and a user terminal information device; an Ethernet wave coupling device module and a network management module are arranged in the comprehensive information access device, one or more Ethernet wave coupling device(s) are contained in the Ethernet wave coupling device, and an Ethernet wave coupling device is contained in the user terminal information device; the mixed signal interface of the Ethernet wave coupling device in the user terminal information device are connected with the mixed signal interface of the corresponding Ethernet wave coupling device in the comprehensive information access device through a coaxial cable. The present invention can process the data signal and the television signal to form a data / television mixed signal, the signal is transmitted to the user through a coaxial cable, the television signal and the data signal are separated at the user terminal, and the data signal and the television signal are not affected during the transmission; the funnel effect can be effectively eliminated; the maintenance is easy, and convenient; and the present invention has a perfect network management function.

The invention discloses a graphene room temperature terahertz wave detector, and the detector comprises a sapphire substrate, log-periodic antennas formed on the sapphire substrate through evaporation, and lead electrodes. Moreover, two sides of the terahertz wave coupling log-periodic antennas are respectively connected with the corresponding lead electrode. A graphene conductive trench with adjustable carrier concentration and high migration rate is disposed in a gap of the log-periodic antennas in a transfer manner, thereby guaranteeing the interconnection between graphene and the log-periodic antenna at two sides. The detector is advantageous in that the detector is high in terahertz wave response, can achieve the detection of broadband, high speed, high sensitivity and high signal to noise ratio terahertz waves; the detector is good in integration and miniaturization, and lays a foundation for the large-scale application.

The utility model provides a wave division multiplex passive optical network device, which comprises a central optical link terminal, a remote terminal node passive photosynthesis component wave unit and n optical network terminals. The central optical link terminal includes a optical retransmission unit and a photosynthetic component wave module; the optical retransmission unit completes retransmission service of which the rate is 10Gbps and further comprises n groups of the OTU modules; the remote terminal node passive photosynthetic component wave unit is a heat-insulated passive module which is used to complete the wave splitting of the forward wave length and the wave coupling of the retrograding wave length. The optical network terminal includes a group of OTU modules which is correspondent to the central optical link terminal, so as to jointly complete one information transmission between the central part and the terminal. As compared with the existing technology, the utility model realizes the 10 Gbps WDM PON for the individual user and improves the available bandwidth of the system. Meanwhile, the deficient transmission range is well solved, so as to achieve the long distance transmission with 10Gbps' WDM PON.