1020results about "Electromagnetic transmitters" patented technology

An adaptive modular multimodal communication and computing panel includes a multilayer stack with a protective layer transmissive in selected bands, a reconfigurable communication layer operable in phased array, reflectarray, hybrid phased reflector, free space optical, or quantum modes, and electronics with heterogeneous processors. A multi scale interconnect and input and output fabric couples electrical, radio frequency, guided optical, and free space optical domains through interfaces including electro optic transduction and RF or baseband conversion. The fabric may implement programmable true time delay, resonators, and comb referenced timing. A management system coordinates beamforming, sensing, routing, calibration, workload placement, and security. Panels tessellate and connect by electrical, radio frequency, and fiber optic interfaces, supporting hot swappable modules, blind mate connectors, robotic servicing, and anti tamper features. Power and thermal subsystems harvest, store, regulate, and dissipate energy. The architecture scales from chip level modules to vehicle, airborne, maritime, orbital, and deployable systems.

The invention relates to the technical field of laser, and provides a laser system with a controllable pulse state and a control method thereof. The control method of the laser system with the controllable pulse state comprises the steps that under the conditions that the cavity length of an FP cavity is in an initial fit state and the air pressure in the FP cavity is standard air pressure, a pump light source is controlled to adjust the pump power according to a first set; in response to the fact that the target pulse interval is smaller than the initial pulse interval, the pump light source is controlled to keep the target power unchanged, the air pressure of the FP cavity is adjusted to be within the preset range, and the cavity length of the FP cavity is adjusted through a second set; determining a target cavity length; controlling the laser to be output in a first pulse state; and controlling the laser to output in a second pulse state. According to the control method, the controllably generated abnormal wave form with the high peak power is introduced according to the preset frame structure to serve as a physical layer disturbance or random segment, and the reliability and safety of system signal transmission are improved under the condition that data segment transmission is not affected.

The invention provides a well drilling anti-interference communication system based on a VCSEL (Vertical Cavity Surface Emitting Laser), the VCSEL and a manufacturing method thereof, and the manufacturing method comprises the following steps: calculating the light field intensity distribution of a high-order transverse mode through an intrinsic mode expansion method and a Laguerre-Gaussian model based on the epitaxial structure parameters of a laser; determining a target area which begins to perform downward annular etching on the surface of the p-DBR layer, wherein the target area coincides with a light field intensity peak area of the high-order transverse mode; performing annular etching in the target area to form an annular groove, and etching at least seven pairs of p-DBR layers inwards in the groove; the communication system comprises a signal transmitting end arranged on the derrick side, and the signal transmitting end is provided with the vertical cavity surface emitting laser; the p-DBR region of the vertical cavity surface emitting laser is provided with an annular etching structure; the graded-index fluorinated plastic optical fiber is used as a transmission medium and is connected with the derrick side and the logging room side; and the optical signal receiving end is arranged at the logging room side and is used for receiving and converting the optical signal into an electric signal.

An exemplary embodiment of the invention relates to a radar system comprising a radar transmission unit (200), a radar reception unit (300), and a central unit (100) which is optically connected to the radar transmission unit (200) and the radar reception unit (300), wherein at least one of said units comprises a signal separator (500) configured to separate a first signal from a second signal, said first and second signal being comprised in a respective optical carrier signal that said at least one unit receives, the signal separator (500) outputting the first signal at a first electrical output port (P1) and the second signal at a second electrical output port (P2), wherein the signal separator (500) comprises a photodetector (510) configured to receive the respective optical carrier signal and generate a photocurrent (Ip), and wherein the signal separator (500) is configured to extract both the first signal and the second signal from said same photocurrent (Ip) in the electrical domain.

A communication method including emitting laser pulses as a signal using one or more transmitters at an atmospheric point. Plasma is generated at the atmospheric point to radiate omnidirectional light. The plasma from the atmospheric point is detected using one or more receivers. The one or more receivers have a direct line-of-sight to the atmospheric point to receive the signal from the one or more transmitters via the omnidirectional light generated by the plasma. The signal is demodulated from the transmitted plasma at each receiver, thereby transmitting information encoded on the signal.

The invention discloses an optical flux-inductance-energy integrated system and a transmitted waveform design method, and the method comprises the steps: carrying out the MLS modulation and OFDM modulation of an input original signal, obtaining an MLS waveform and an OFDM waveform, carrying out the amplitude distribution of the two waveforms, and combining the two waveforms according to a time sequence to form an MLS-OFDM AC signal; after the alternating current signal is subjected to digital-to-analog conversion, outputting the alternating current signal according to a set driving peak-to-peak value voltage, superposing a direct current component in the alternating current signal so as to carry out alternating current and direct current amplitude distribution, and outputting an analog electric signal; the transmitter converts analog electric signals into optical signals, and the optical signals are simultaneously connected with the information decoding module, the sensing processing module and the energy collecting module. According to the hybrid MLS-OFDM waveform design scheme combining alternating-current amplitude distribution and alternating-current and direct-current amplitude distribution, flexible balance among communication, perception and energy collection performance in an optical flux-inductance-energy integrated system is achieved, the complexity of the system can be reduced, and the system is made to be lighter and more compact.

A quantum radio frequency (RF) signal transmitter may include a plurality of Rydberg cells, each configured to generate a respective RF signal. A combiner downstream from the plurality of Rydberg cells may be configured to combine the respective RF signals into an output RF signal.

The embodiments of the present application provide a signal transmitting method and device, a non-volatile readable storage medium and an electronic device. The method includes: when a first light emitting element has acquired a first electric signal, converting the first electric signal into a first optical signal, inputting the first optical signal into a first light-switching-switch unit, and outputting the first optical signal to an outputting port of the first light-switching-switch unit via a first optical passage, wherein the first electric signal is an electric signal of a first type, and the outputting port is connected to an optical fiber; and when a second light emitting element has acquired a second electric signal, by using the second light emitting element, converting the second electric signal into a second optical signal, inputting the second optical signal into the first light-switching-switch unit, and outputting the second optical signal to the outputting port of the first light-switching-switch unit via a second optical passage in the first light-switching-switch unit, wherein the second electric signal is an electric signal of a second type.

The invention relates to a Rydberg atomic communication receiving system and method based on AT split peak value analysis, and belongs to the technical field of quantum communication. The system comprises a detection laser, a coupling laser, an AOM / EOM, a function generator, a high-frequency signal generator, a cesium atom gas chamber, a photoelectric detector, a lock-in amplifier, a data acquisition module and a microwave signal output module. The AOM / EOM modulates the frequency of the detection laser; the microwave signal output module generates an AM modulation microwave signal and transmits the AM modulation microwave signal to the cesium atom gas chamber, so that the target Rydberg state atoms generate an AT splitting effect to calibrate system parameters; the photoelectric detector and the lock-in amplifier obtain a first harmonic component based on the transmission light. During communication, the system is arranged in a microwave electric field received by communication, and the data acquisition and processing module outputs AM modulation microwave signals received by the recovered cesium atom gas chamber based on calibrated system parameters and phase locking. The method solves the problem of signal distortion existing in EIT-AT direct communication transmission and the problem of tedious operation of a heterodyne method.

An optical transmission apparatus includes an optical transmitter that generates an optical signal in an uplink direction by modulating output light of a laser that outputs light of a first frequency with a subcarrier on which transmission data is superimposed, a heterodyne detection unit that receives an optical signal in a downlink direction by heterodyne detection, a control unit that calculates a first intermediate frequency based on the frequency of the downlink signal received by the heterodyne detection and the first frequency of the laser, and controls the first frequency of the laser when there is a difference between the calculated first intermediate frequency and a reference second intermediate frequency by a threshold or more.

A receiver of an optical communication system includes an organic photoelectric conversion device configured to convert optical signals received from a transmitter into an electrical signal; and a demodulator configured to input the electrical signal to a trained artificial neural network and demodulate the electrical signal based on an output of the trained artificial neural network.

A quantum entanglement system comprising a laser system, a spontaneous parametric down conversion crystal system, and a thermal management system. The laser system is configured to generate a laser beam. The spontaneous parametric down conversion crystal system comprises a spontaneous parametric down conversion crystal configured to receive the laser beam at a spontaneous parametric down conversion crystal and generate an entangled photon pair in response to the spontaneous parametric down conversion crystal receiving the laser beam. The thermal management system is configured to maintain the spontaneous parametric down conversion crystal at an annealing temperature during a generation of the entangled photon pair. A translation system is configured to move a position of the spontaneous parametric down conversion crystal. A

Parallel optical transponders with an optical comb source, and methods of using the same, are provided. The optical comb source can provide multiple optical carriers from a single source. The multiple optical carriers can be phase-aligned, which can allow joint processing of a received signal. The multiple optical carriers can also allow for modulating a demultiplexed data signal using multiple modulators rather than modulating the entire data signal using a single modulator.

a communications system comprising a laser generation system configured to emit a set of laser beams; a computer system; and a communications manager in the computer system. The communications manager is configured to identify digital information for transmission. The communications manager is configured to control an emission of the set of laser beams by the laser generation system to generate electromagnetic radiation at positions in a space with motions between the positions, with the positions and the motions between the positions thereby encoding the digital information.

The invention provides an energy-information collaborative optimization system and optimization method.The optimization system comprises a reverse communication module, a collaborative control unit, a pump laser and an optical phase conjugation module which are connected in sequence, and the reverse communication module is connected with a receiving end of an optical fiber energy-information co-transmission system; the optical phase conjugation module is used for acquiring output electric power of a receiving end photocell and a communication performance index for representing communication quality, and is arranged at a midpoint position of an optical fiber link; the cooperative control unit is used for reading the output electric power of the photocell and the communication performance index acquired by the reverse communication module and dynamically adjusting the output of the pump laser based on the output electric power of the photocell and the communication performance index, so that the phase conjugation efficiency of the optical phase conjugation module is changed; therefore, the value of the comprehensive performance function is maximized. According to the energy-information collaborative optimization system and optimization method, collaborative optimization of communication quality and energy transmission efficiency can be realized.

The invention provides a one-way data transmission system based on laser collimation transmission and optical isolation, and the system employs a closed-loop control module which integrates high-collimation laser emission, optical channel guidance, receiving end optical isolation and photoelectric conversion, and signal processing and system monitoring. A complete and intelligent one-way data transmission solution is constructed, strict unidirectionality and physical irreversibility of a laser signal transmission path are effectively ensured, meanwhile, the system can dynamically and adaptively compensate performance fluctuation caused by environment or device factors through real-time monitoring of communication quality and key parameters, and the reliability of the system is improved. Therefore, high-reliability and high-security data transmission is maintained in the whole life cycle, and the long-term stability and anti-eavesdropping capability of the system in a harsh application environment are remarkably improved.

The invention provides a terahertz frequency comb generation verification method and system based on an optical fiber microcavity optical frequency comb, and the method comprises the steps: injecting a continuous wave laser into an optical fiber microcavity resonator to generate a stable Kerr optical frequency comb, enabling the Kerr optical frequency comb to work in a single soliton state or a soliton crystal state, and obtaining an optical frequency reference with low phase noise. Furthermore, spectrum selection is performed on the optical frequency comb, multiple groups of optical comb tooth pairs comprising comb teeth of different orders are actively selected, and the optical frequency difference of each group of comb tooth pairs is directly converted into an electric signal in a terahertz frequency band by utilizing a beat frequency effect of a photoelectric detector. A plurality of terahertz electric signals generated by different comb tooth pairs are integrated to form a multi-channel terahertz frequency comb. The method allows a plurality of discrete and frequency-controllable terahertz signal channels to be generated in parallel on a single optical platform through one-time optical processing and photoelectric conversion, so that multichannel terahertz frequency comb generation is realized.

The invention provides a laser communication system for an unmanned aerial vehicle platform, and the system comprises a navigator which is disposed at the upper part of the unmanned aerial vehicle platform and is used for obtaining the position of the unmanned aerial vehicle platform; the sensing module is arranged on the upper portion of the unmanned aerial vehicle platform and used for obtaining the posture of the unmanned aerial vehicle platform; the control module is used for acquiring an aiming angle currently required by the laser communication terminal based on the self position and the self attitude of the unmanned aerial vehicle, and controlling the unmanned aerial vehicle platform to execute a flight instruction according to the aiming angle; the laser communication terminal is controlled by the control module to execute the scanning instruction, captures and tracks an optical signal according to scanning, and receives and transmits the optical signal to perform laser communication; the invention further provides a working method of the laser communication system for the unmanned aerial vehicle platform. The unmanned aerial vehicle attitude adjustment is used for replacing a two-dimensional rotary table of an original laser communication terminal, composite control over the unmanned aerial vehicle laser communication terminal is achieved, and the weight and power consumption of the unmanned aerial vehicle laser communication terminal are effectively reduced.

Transmitter device (99) transmitting by means of optical radiation (108), said device being characterized in that it comprises at least one modulator stage (101 ) comprising: - an input (105) adapted to receive during use an electrical signal (s(t)) to be modulated, and - an output (107) transmitting, towards at least one photoemitter (100), a voltage or current driving signal (v7(t), i7(t)) for which said electrical signal (s(t)) represents a modulating signal, where said at least one photoemitter (100) transmits an optical radiation (108) with radiation intensity lr(t) variable in accordance with said driving signal (v7(t), i7(t)), and wherein, between said input and said output of said modulator stage (107), a cascade of a first AM modulator (102) and of a second FM modulator (103) is present, said FM modulator (103) being placed downstream of said AM modulator (102) and having an own output directly connected with the output (107) of said modulator stage (101 ), wherein said AM modulator (102) has an input directly connected to said input (105) of said modulator stage and is directly supplied by means of said electrical signal (s(t)) to be modulated and wherein said AM modulator (102) has an output on which it generates an intermediate signal (s2(t)) supplied as an input to said FM modulator (103). The present invention also regards a receiver device, also multi-channel, and methods for transmission and modulation, and reception and demodulation, employing a hybrid AM modulation / FM.

The utility model relates to the technical field of optical communication, in particular to a spectrum detector and optical communication equipment. The spectrum detector comprises a double-fiber collimator used for inputting a detection light signal; the beam splitter prism is positioned on the light emitting side of the double-fiber collimator, and the light incident surface of the beam splitter prism is over against the light emitting side of the double-fiber collimator; the fixed spectroscope is positioned on one side, far away from the double-fiber collimator, of the beam splitter prism; the movable spectroscope is positioned on the reflected light emergent side of the beam splitter prism and can be close to or far away from the beam splitter prism along the light emergent direction of the beam splitter prism; the first photoelectric detector is located on the side, away from the movable spectroscope, of the beam splitter prism; the second photoelectric detector is located on the side, away from the beam splitter prism, of the fixed beam splitter. The volume of the spectrum detector can be effectively reduced.

This disclosure aims to provide a technology that enables the demodulation of received data regardless of the influence of the external environment. [Solution] The data transmission system 100 of this disclosure comprises a transmitting device 2 comprising an amplitude modulator 23 for amplitude modulating transmission data and a vibration generator 21 for applying vibration to the optical transmission path 14 in the optical fiber cable 13 with the amplitude modulated modulation signal, and a receiving device 1 comprising a vibration sensor 10 for detecting vibrations in the optical transmission path 14 and a demodulator 16 for demodulating the amplitude modulated transmission data from the vibrations in the optical transmission path 14.

A lighting apparatus includes a light source, a power module, a controller, a data input module, a serial-to-parallel converter module, an orthogonal frequency division multiplexing (OFDM) modulation module, a radio frequency (RF) upconversion module and an antenna module. The light source including multiple types of LED modules. The controller generates multiple driving currents supplied to the LED modules. The data input module is coupled to the controller. The data input module receives input data to be transmitted. The serial-to-parallel converter module converts the input data into multiple parallel data streams. The orthogonal frequency division multiplexing (OFDM) modulation module modulates the parallel data streams onto multiple orthogonal subcarriers. The antenna module includes multiple antennas configured to transmit RF signals corresponding to the multiple data streams.

The application relates to a photonic tensor calculation method, a photonic tensor core, a computer device and a storage medium. The method comprises the following steps: generating a multi-wavelength optical signal, modulating optical signals of each wavelength in the multi-wavelength optical signal through a first loopback arrayed waveguide grating, and multiplexing to obtain a first optical signal with multiple wavelengths; splitting each first optical signal to obtain a plurality of first optical signal copies, and modulating optical signals of each wavelength in a single first optical signal copy through a plurality of second loopback arrayed waveguide gratings, and multiplexing to obtain a second optical signal; and photoelectrically converting each second optical signal to obtain a tensor calculation result. The method can improve the photonic tensor calculation accuracy and scalability.

The application discloses a phase-sensitive pre-amplification method based on an electro-absorption modulated laser, and is applied to a star-ground laser communication system receiving end. A distributed feedback laser in the electro-absorption modulated laser amplifies weak pump light after long distance transmission, and generates idler light under the nonlinear effect of a laser cavity; an electro-absorption modulator in the electro-absorption modulated laser detects phase error information between signal light, pump light and idler light, and constructs an optical injection phase-locked loop through a feedback loop, so that stable control of the three-wave phase relationship is realized. Under the phase stability condition, the output light of the electro-absorption modulated laser is fed into a later-stage nonlinear medium to complete phase-sensitive pre-amplification. The phase-sensitive pre-amplification method based on the electro-absorption modulated laser has the advantages of simple structure and easy integration, can realize pump light amplification, idler light generation and phase error suppression under the condition of weak pump light, and effectively improves the receiving sensitivity performance of the star-ground laser communication system.

The application relates to an optical signal transmission device. The optical signal transmission device comprises an optical emission module, an optical fiber connection module and an optical receiving module; the optical emission module is integrated on a silicon optical chip; the optical emission module comprises a modulator and a plurality of lasers; the modulator couples received electrical signals and optical signals emitted by the lasers; the modulated optical signals are sent to the optical fiber connection module; the optical fiber connection module sends the modulated optical signals to the optical receiving module; and the optical receiving module outputs to-be-recovered electrical signals based on the modulated optical signals. The optical signal transmission device can save chip manufacturing costs, realize high-bandwidth transmission, and balance transmission performance and costs.

An optical transceiver is disclosed that implements smooth high frequency connection between a DSP and an optical module. The optical module may include an optical receiver module and an optical modulator module. The optical transceiver may include a single optical module in which functions of both the optical receiver and the optical modulator are integrated. The high frequency connection is implemented by a flexible circuit board (FPC), and the FPC electrically connects between a PAD on the upper surface of a DSP circuit board and a PAD of a package of the optical module. A connection PAD on one surface of the FPC is connected to the DSP circuit board side, and a connection PAD on the other surface is connected to the optical module side. A DSP chip may be mounted on the DSP circuit board, and the entire DSP may be covered with a lid except for a region of the DSP circuit board connected to the FPC.

The disclosure provides a laser, a preparation method of the laser and an optical module, and relates to the technical field of optical elements, so as to meet the demand of the optical module for high-power lasers. The laser comprises the following steps: growing an etching auxiliary layer on the surface of a wafer body of the laser, the longitudinal etching rate of the wafer body is greater than the transverse etching rate of the wafer body, the transverse etching rate of the etching auxiliary layer is greater than the transverse etching rate of the wafer body, and the wafer body comprises a quantum well layer; forming a mask layer above the etching auxiliary layer, and pre-treating the mask layer to form a BH pattern; etching the BH pattern, so that the top of the wafer body is etched into a BH mesa, the etching depth is below the quantum well layer, and the etching depth is below the quantum well layer; growing a current blocking layer on both sides of the BH mesa; removing the mask layer and the etching auxiliary layer; and forming a P-InP layer on the top of the BH mesa and the current blocking layer.

A quantum computing system, comprising: an optical source for generating a continuous-wave, cw, optical carrier signal at a carrier wavelength; a confinement chamber; and optical intensity modulation apparatus comprising; an optical modulator operative to modulate the continuous-wave, cw, optical carrier signal to generate at least one sideband on the optical carrier signal, a radio frequency, RF, signal generator, operative to provide an RF drive signal to the optical modulator; a first optical waveguide grating having a central reflection wavelength corresponding to one of said sideband(s); and optical routing apparatus configured to direct the optical carrier signal and the at least one sideband to the first optical waveguide grating; and to direct a reflected optical signal from the first optical waveguide grating towards an output to form an output optical signal to be delivered to the confinement chamber.

An optical system includes a first modulator configured to: receive first input light, modulate an amplitude of the first input light with a first data signal, modulate a phase of the first input light with a first marker signal, and output to an optical element, as first modulated light, the first input light modulated with the first data signal and the first marker signal. The optical system includes a second modulator configured to: receive second input light, modulate an amplitude of the second input light with a second data signal, modulate a phase of the second input light with a second marker signal, and output to the optical element, as second modulated light, the second input light modulated with the second data signal and the second marker signal. The second marker signal includes a complementary version of the first marker signal.

An optical device includes a generator, a light emitter, a modulator, an optical amplifier, a current source, a storage, and a controller. The generator generates an electric signal of a multilevel amplitude modulation method. The light emitter emits laser light. The modulator modulates the laser light using the electric signal and outputs an optical signal. The optical amplifier optically amplifies the modulated optical signal according to a drive current. The current source adjusts the drive current to be supplied to the optical amplifier. The storage previously stores an information with respect to input-output characteristics of the optical signal in the optical amplifier relative to drive current value of the drive current. The controller acquires, from the storage, the input-output characteristics corresponding to the drive current value of the drive current supplied to the optical amplifier and controls the electric signal based on the acquired input-output characteristics.