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146results about How to "No crosstalk" patented technology

Ultra-large capacity time division and wavelength division fiber grating sensing system and query method thereof

The invention relates to an ultra-large capacity time division and wavelength division fiber grating sensing system and a query method of the fiber grating sensing system. The ultra-large capacity time division wavelength division fiber grating sensing system consists of a broadband light source, a modulation module, a circulator, a fiber Bragg grating sensing array, a sampling module, a wavelength demodulation instrument and a data processing computer, wherein the modulation module and the sampling module comprise a SOA high-speed photoelectric switch respectively and are driven by different channels of the same signal generator, and a phase difference exists between two drive pulses; and the fiber Bragg grating sensing array can be composed of identical fiber gratings or multi-wavelength fiber gratings. With the adoption of a technology combining a time division multiplexing with a wavelength division multiplexing, tens of thousands of gratings can be engraved on an optical fiber. The ultra-large capacity time division and wavelength division fiber grating sensing system has characteristics of large system capacity, high response speed, good expandability, high flexibility, good stability, low cost and the like, can perform dynamic measurement and static measurement at the same time, and can satisfactorily meet requirements of internet of things on information capacity.
Owner:安徽龙联智能光电有限公司

Polarization multiplexing holographic imaging method based on transmission type all-medium metasurface

The invention belongs to the technical field of micro-nano optics, polarization optics and optical holographic, and discloses a polarization multiplexing holographic imaging method based on a transmission type all-medium metasurface. A response main wavelength <lambda> is determined; geometric parameters of a unit structure are determined; a GS phase recovery algorithm is adopted to obtain phase distribution of the unit structure responding to the main wavelength; the pixel point of each element is expanded into a 2*2 array by adopting a Dammann grating method, and the obtained each pixel unitcomprises information responding to horizontal polarized light and information responding to vertical polarized light; and a synthesized silicon nano-antenna array is irradiated by horizontal polarized light and vertical polarized light with the wavelength of <lambda>, and different holographic images are reconstructed. According to the method, phase modulation of 0-2 <pi> can be realized only bychanging the size of the short axis of the silicon nano-antenna, and an embossment phase modulation structure of any step number can be realized equivalently; and a simple process, high processing error tolerance and quite high stability and reliability are achieved.
Owner:UNIVERSITY OF CHINESE ACADEMY OF SCIENCES

Improving the detection terminal of the platform area topology identification efficiency and line loss accuracy

The invention discloses a detection terminal for improving the efficiency of station area topology identification and the precision of line loss, comprising a management terminal, a topology identification terminal and a handheld PDA device, wherein, the topology identification terminal is used for acquiring electric energy and topology data of a branch access point and uploading the power and topology data to the management terminal; A handheld PDA device for transmitting binding information between the topology identification terminal and the branch access point to the management terminal; The management terminal is configured to draw a topology map according to the received power and topology data and the binding information between the topology identification terminal and the branch access point. The invention solves the problem of large fluctuation of line loss rate detection in the prior art, In order to improve the efficiency of topology identification and the precision of lineloss, the power frequency communication technology is used to measure, collect, store and transmit the topology information of low voltage distribution, which improves the high quality and high efficiency management of power supply enterprises to customers.
Owner:CHENGDU POWER SUPPLY COMPANY OF STATE GRID SICHUAN ELECTRIC POWER

Reflective aluminum nanorod array and method for realizing color hologram by using same

ActiveCN105068396ASimple processGood processing error toleranceNanoopticsInstrumentsDielectric substrateMagnesium fluoride
Provided is a reflective aluminum nanorod array. Each nanorod and a magnesium fluoride layer, an aluminum reflective layer and a dielectric substrate layer corresponding to the nanorod constitute a unit structure. The unit structures have narrow band response to red, green and blue light respectively, and the unit structures are recorded as a unit structure R, a unit structure G and a unit structure B respectively. The three unit structures are alternately arranged in sequence in the length direction of the unit structures. A method for realizing color hologram by using the reflective aluminum nanorod array comprises the steps of determining the main wavelength of response, finding out the side length of the unit structures, the thickness of the magnesium fluoride layers and the width, height and length of the nanorods, calculating the arrangement period size, the number of units and the orientation angle, and arranging the three unit structures alternately for color hologram. The advantages are as follows: the process is simple and has high stability and reliability; the aluminum nanorod corresponding to each structure parameter modulates the phase of light of only one color, and there is no crosstalk between light of different colors; and the reflective aluminum nanorod array and the method can be widely used in true color 3D display, information storage and other fields.
Owner:CHINA INFORMATION COMM TECH GRP CORP

Micro-fluidic chip and chip assembly

The invention discloses a micro-fluidic chip and a chip assembly, and relates to the technical field of microfluidics. Integration and fully integrated operation of sample preparation and amplification separation in nucleic acid detection can be realized, operation of the nucleic acid is facilitated, and the nucleic acid detection efficiency is improved. The micro-fluidic chip comprises a liquid storage unit, an extraction and amplification unit as well as a waste liquid recovering unit, wherein the liquid storage unit is used for realizing sequential sampling of liquid reagents; the extraction and amplification unit is used for performing amplification and separation to obtain a to-be-detected sample; the waste liquid recovering unit is used for recovering the detection waste liquid; theliquid storage unit comprises a plurality of liquid storage devices and a first circulating pipeline communicated with the liquid outlet of each liquid storage device; a first control piece is arranged between each liquid outlet and the first circulating pipeline; the first control piece is used for controlling the breakover state of the liquid outlet; when any one liquid storage device is in a pressurizing state, the corresponding first control piece is in an opening state and the rest first control pieces are in a closed state. The micro-fluidic chip and the chip assembly, which are providedby the invention, are applied to nucleic acid detection.
Owner:HANGZHOU ZIJING BIOLOGY CO LTD

Loudspeaker box and electronic device with the loudspeaker box

InactiveCN106101956AReduced front chamber resonanceReduce high-order harmonic componentsElectrical transducersLoudspeakersIntermediate frequencyDistortion
The invention provides a loudspeaker box and an electronic device with the loudspeaker box. The loudspeaker box comprises an upper cover with a top wall, a lower cover, a single loudspeaker contained between the upper cover and the lower cover, and a leakage structure. The single loudspeaker comprises vibration diaphragm. The upper cover and the vibration diaphragm form a front voice chamber. The loudspeaker box is also equipped with a voice outlet channel communicated with the front voice chamber. The front voice chamber and the voice outlet channel form a front chamber. The leakage structure comprises a sealing cover and a leakage pipeline arranged on the top wall. A hollow chamber is enclosed by the upper cover and the sealing cover. The leakage pipeline is communicated with the front chamber and the hollow chamber. The leakage pipeline comprises a first opening end communicated with the hollow chamber, a second opening end communicated with the front chamber, and a connection channel connected with the first opening end and the second opening end. Compared with the prior art, the loudspeaker box provided by the invention has the advantages that the intermediate frequency distortion is relatively low, the high frequency resonance is reduced, the resonance peak is reduced, the high frequency components are reduced, the sense of listening gets better, and there is no voice crosstalk at a voice outlet hole.
Owner:AAC TECH PTE LTD

Glass-free three dimensional display apparatus and control method of the same

The invention discloses a glass-free three dimensional display apparatus and a control method of the same. The glass-free three dimensional display apparatus includes a display panel, a liquid crystal grating, a processor and an image collector, wherein the display panel is used for outputting frames; the liquid crystal grating is arranged between the display panel and a viewer for separating the visual frames of double eyes of the viewer; the image collector is used for acquiring the first current viewed information and the second current viewed information, and sending the first current viewed information and the second current viewed information to the processor; and the processor is used for adjusting the width and / or position of the light transmission area of the liquid crystal grating according to the first current viewed information, and adjusting the output frame of the display panel according to the second current viewed information and the adjusted width and / or position of the light transmission area of the liquid crystal grating. The glass-free three dimensional display apparatus realizes that crosstalk does not occur in the 3D image viewed by the viewer when the position of the viewer is changed, and can realize the anti-peeping function at the same time.
Owner:BOE TECH GRP CO LTD +1

Carbon monoxide and methane integral optical fiber sensing measuring system

This is an integral optical fiber sensor and testing system using for the carbon monoxide and methane. It composes of first DFB laser source, second DFB laser source, first waveform generator, second waveform generator, first wavelength select modulator, second wavelength select modulator, optical fiber coupling implement, sensor detection head, photoelectric conversion module, signal modulate data collection module and microprocessor. The first waveform generator acts on first wavelength select modulator, the latter controls the first DFB laser source and it connects with one import ending of coupling implement by optical fiber. The second waveform generator acts on second wavelength select modulator, the latter controls the second DFB laser source and it connects with another import ending of coupling implement by optical fiber. The fan-out of coupling implement connects with sensor detection head and the latter connects with photoelectric conversion module. The photoelectric conversion module connects with signal modulate and data collection module by lead and the latter connects with microprocessor by lead. The microprocessor controls the first wavelength selecting and modulator, second wavelength selecting and modulator and display modulator.
Owner:WUHAN WUTOS

Plastic optical fiber network electricity checks meter system

The invention provides a plastic optical fiber network electricity checks meter system, and belongs to the field of power line information transmission. The checks meter system provided by the invention has strong anti-electromagnetic interference and nuclear radiation resistance as well as reliable performance; collected data has strong real-time performance, and low cost and high speed transmission of data are realized; the plastic optical fiber network electricity checks meter system is composed of electricity meters, a meter reading module, plastic optical fiber, a plastic optical fiber network switch and a data processing center; The signal flow direction of the checks meter system is as follows: an optic transmitter of the meter reading module converts an electricity meter signal to a network optical signal; the optical signal is coupled to the plastic optical fiber; an optical receiver of the meter reading module receives signals and reduces the optical signal to a network electrical signal; the plastic optical fiber network switch is used for data processing; and the data processing center is used to process data so as to complete the whole process of meter reading. The checks meter system provided by the invention has excellent anti-electromagnetic interference performance, strong security, high sensitivity and small volume, is simple to prepare, requires low cost, and has waterproof and moistureproof properties as well as long service life.
Owner:CHINA ELECTRIC POWER RES INST +1

Multiplexer and demultiplexer, transmitter and receiver, optical fiber communication system and methods

The invention provides a multiplexer and a demultiplexer, a transmitter and a receiver, periodic orthogonal waveform signal generation units, an optical fiber communication system and corresponding methods. The multiplexer that is used for multiplexing a plurality of user signals comprises: a plurality of periodic orthogonal waveform signal generation units, which are configured to generate a plurality of periodic orthogonal waveform signals in a paired orthogonal mode; an electric modulator, which is configured to respectively modulate a plurality of user signals to the plurality of periodic orthogonal waveform signals; and an electric combiner, which is configured to mixing the plurality of modulated signals into a single signal. According to the invention, the periodic orthogonal waveform signals in a paired orthogonal mode are used as basic multiplexing units and the different user signals are respectively modulated to the periodic orthogonal waveform signals; and the modulated signals are mixed into the single signal so as to generate an optical signal, so that signal transmission in an optical fiber can be realized conveniently. Therefore, the communication transmission capacity and the bandwidth utilization efficiency can be substantially improved.
Owner:WUHAN POST & TELECOMM RES INST CO LTD

Optical fiber simulated Raman scattering effect based optical neuron and establishment method thereof

The invention discloses an optical fiber simulated Raman scattering effect based optical neuron and an establishment method thereof. The optical neuron comprises external optical transmitters, a first local optical transmitter, a second local optical transmitter, a subtracter, a combiner, a third optical fiber, an optical filter, a first optical-electrical converter, a second optical-electrical converter and a laser diode, wherein the third optical fiber performs power cumulative summing operation by non-linear effect of simulated Raman scattering. The method includes: selecting the external optical transmitters and the first local optical transmitter, performing coupling output by the combiner, selecting the third optical fiber for power cumulative summing operation, selecting the optical filter, selecting the first optical-electrical converter, selecting the second local optical transmitter and the second optical-electrical converter, constructing the subtracter, and selecting the laser diode for converting electrical signals to optical signals. The optical neuron is novel and reasonable in design, convenient to implement, low in cost, power consumption and noise, rapid in information processing, high in expandability and practicality, good is using effect and convenient to popularize and use.
Owner:XIAN UNIV OF POSTS & TELECOMM

Optical module

The embodiment of the invention discloses an optical module. One side of a shell is provided with an optical receiving adapter and an optical transmitting adapter and the shell is internally providedwith a laser array, a transmitting-end optical multiplexing module and a first displacement prism; one end of a PCB is arranged in the shell, and the laser array is electrically connected with the upper surface of the PCB; the lower surface of the PCB is provided with an optical receiver array; the first displacement prism propagates light from the optical receiving adapter to the lower surface ofthe PCB, and the light then passes through a receiving-end optical multiplexing module and is reflected to the optical receiver array through a reflecting surface; the laser array and the transmitting-end optical multiplexing module are arranged in the shell and corresponding to the upper surface area of the PCB; the received light is propagated to the lower surface of the PCB through the first displacement prism. A component at the receiving end and a component at the transmitting end are located at different sides of the PCB, when the optical module works, no crosstalk happens between the component at the receiving end and the component at the transmitting end, and according to the above layout mode, the utilization ratio of the shell is improved.
Owner:HISENSE BROADBAND MULTIMEDIA TECH

Plastic optical fiber electric power meter reading system

The invention provides a plastic optical fiber electric power meter reading system, and belongs to the field of transmission of digital information on electric power lines. The plastic optical fiber electric power meter reading system has strong electromagnetic interference resisting and nuclear radiation resisting capabilities as well as reliable performance, and achieves low cost and high-speed transmission of data. The plastic optical fiber intelligent electric power meter reading system is composed of an optical transmitter, an optical receiver, plastic optical fiber, a data joint device, a data concentrator and a plurality of passive devices, wherein an electric meter signal (such as a Transistor-Transistor Logic (TTL) level signal) of the optical transmitter drives an optical signal, the optical signal is coupled to the plastic optical fiber and transmitted to the optical receiver through the plastic optical fiber, the light receiver restores the optical signal to the electric signal (such as a TTL level signal), and data processing is carried out by the data concentrator to finish the whole process of POF (plastic optical fiber) intelligent electric power meter reading. The meter reading system has the advantages of excellent electromagnetic interference resistance, high reliability, strong confidentiality, high sensitivity, smaller volume, simpleness in preparation, low cost, waterproof and moisture-proof properties and long service life.
Owner:CHINA ELECTRIC POWER RES INST +1
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