529 results about "Optical transmitter" patented technology

The invention relates to the technical field of optical wireless communication, in particular to an optical wireless communication device and method based on beam shaping, and the device comprises a beam shaping module which comprises at least one beam shaping lens so as to convert a beam outputted by a point light source into a uniformly distributed linear or planar light field; the optical transceiver module comprises a plurality of optical base stations, the optical base stations are arranged in a redundant mode in the extension direction of the communication scene, each optical base station integrates at least one optical transmitter, an optical detector and a plurality of prisms and is used for transmitting and receiving optical signals, and the coverage range of the single optical base station is expanded through the prisms; and the dynamic demodulation module is connected with the optical detector, and dynamically adjusts the demodulation threshold value of the corresponding bit error rate according to the real-time channel state. Therefore, when the technology is applied to wireless optical communication, the communication performance can be improved, the coverage distance can be increased, the coverage uniformity can be improved, the bit error rate can be reduced, the construction cost can be reduced, and the long-term stable communication requirement of a closed scene can be met.

An optical transmitter includes a distributed feedback (DFB) laser having an active region formed as a multiple quantum well (MQW) and a diffraction grating, an electro-absorption (EA) modulator having an absorption region formed as a MQW having a composition different from a composition of the DFB laser, a semiconductor amplifier (SOA) having an active region having a same composition as the composition of the DFB laser, a bent waveguide that rotates a light propagation direction, and a passive waveguide connected to the SOA and including a core having a band gap wavelength shorter than an oscillation wavelength of the DFB laser. A tapered region of the passive waveguide converts a width W1 of the passive waveguide connected to the SOA into a width W2 of a narrow waveguide region of the passive waveguide, and the passive waveguide is in contact with the end surface of the substrate.

The invention discloses an inter-satellite laser communication link simulation device based on energy feature inversion. Belongs to the technical field of satellite laser communication, particularly relates to the technical field of inter-satellite laser communication link simulation devices based on energy feature inversion, and provides an inter-satellite laser communication link simulation device based on energy feature inversion. And an equivalent energy environment is constructed in the system, and accurate testing of the communication capability of the terminal machine is realized. The device comprises a transmitting optical transceiver, a receiving optical transceiver, a communication attenuation simulation module and a computer, the transmitting optical transmitter and receiver transmits a communication light beam along the communication attenuation light path A or the communication attenuation light path B, and the communication light beam is transmitted into the receiving optical transmitter and receiver after being subjected to dynamic simulation communication attenuation by the communication attenuation simulation module; the computer is used for controlling the communication attenuation simulation module to dynamically simulate communication attenuation.

A practice aid system includes: a practice aid device; a hoop sensor system, including first and second pairs of an optical transmitter and receiver, which are mountable on a rim of a basketball hoop; an intelligent ball, including an inflatable ball body, a ball control unit, a ball light source, and a ball motion and location sensor; an intelligent shoe, including a shoe body, a shoe control unit, a shoe motion and location sensor, a vibrator, and a shoe light source.

An electro-optical integrated circuit comprising an optical transmitter and an optical receiver is disclosed in which a monolithically integrated electro-absorption modulated laser (EML) can operate bi-directionally in both transmitter and receiver modes. Vertically stacked waveguides for lasers and electro-absorption modulators (EAMs) are provided. The laser and the EAM are optically coupled through a transverse conical vertical optical coupler. The EML includes monolithically integrated electronic circuitry, such as drivers and control electronics for driving the laser as the EML and the EAM in the transmitter mode. The control circuit includes a transimpedance amplifier (TIA). The EAM has a first portion and a second portion that may be independently biased. In receiver mode, the laser current is reduced near a threshold, a first portion of the EAM is biased to absorb residual laser light, while a second portion of the EAM provides photocurrent to the TIA as a photodiode receiver.

The invention relates to an Optical Front-end, OFE, (400) for Optical Wireless Communication, OWC, the OFE comprising: an optical receiver with at least a photodetector (102a) and a trans-impedance amplifier, and a two-dimensional array of optical transmitters (103a) each having an individual transmitter field-of-view, and one or more drivers, the two-dimensional array arranged to create a combined transmitter field of view that is larger than 5 the individual transmitter field of view, the plurality of optical transmitters arranged such that optical axes of the plurality of optical transmitters are evenly distributed within the combined transmitter field of view.

The present invention relates to the field of communication and sensing, and specifically to a communication and sensing integrated device based on a seven-core optical fiber interferometer and an application method therefor. The application method comprises: a first beam splitter splitting, into reference light and signal light, a light source emitted by a narrow linewidth laser; performing modulation by means of a first coherent optical transmitter and a second coherent optical transmitter; amplifying the light by means of a first amplifier and a second amplifier, and then enabling the light to pass through a multi-core optical fiber from a fan-in end, and to output from a fan-out end; performing beam splitting by means of a second beam splitter and a third beam splitter, and performing demodulation by means of a first coherent receiver and a second coherent receiver; and finally, a phase-locked loop performing interference elimination on preliminarily-demodulated reference light and preliminarily-demodulated signal light to obtain finally-demodulated reference light and finally-demodulated signal light. The present invention uses a phase-locked loop to further eliminate disturbance noise of reference light and signal light. Therefore, noise interference is eliminated in continuous low-frequency detection, thereby improving the communication and sensing effect.

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.

The invention relates to an optical signal transmission device. The optical signal transmission device comprises an optical transmitter and an optical receiver. The optical transmitter and the optical receiver are connected through an optical fiber, the optical transmitter comprises a laser and a silicon optical chip, and the laser is used for outputting multiple paths of optical signals to be transmitted to the silicon optical chip; the silicon optical chip is used for carrying out modulation and wave combination processing on multiple paths of optical signals to be transmitted and transmitting the processed optical signals to the optical receiver through an optical fiber; and the optical receiver is used for performing photoelectric conversion on the processed optical signal to generate an electric signal corresponding to the optical signal to be transmitted. According to the invention, the silicon optical chip is directly adopted to realize modulation and wave combination processing at the same time instead of adopting semiconductor chips such as a laser chip for modulation and then adopting an independently arranged wave combiner for wave combination, so that the optical transceiver module can be arranged more ingeniously, the integrity of optical signal transmission can be ensured, and the optical signal transmission efficiency is improved. And the optical signal transmission performance can be improved.

The utility model discloses a laser degumming device, which relates to the technical field of laser degumming, and comprises an external refrigeration mechanism and a degumming mechanism, the external refrigeration mechanism is used for pre-refrigerating a magnet with glue, the degumming mechanism comprises a three-axis linear displacement mechanism and a laser emission mechanism, the three-axis linear displacement mechanism is provided with a moving end, and the laser emission mechanism is provided with a laser emission end. The moving end is provided with a glue removing platform, the glue removing platform is used for placing a pre-refrigerated magnet with glue, the glue removing platform is further provided with an internal refrigeration mechanism, the internal refrigeration mechanism is used for refrigerating the pre-refrigerated magnet with glue on the glue removing platform again, and the laser emitting mechanism is fixedly arranged. And the laser degumming mechanism is used for emitting laser when the internal refrigeration mechanism refrigerates the glued magnet and degumming the glued magnet. According to the utility model, the adhesive magnet is refrigerated through the external refrigeration mechanism and the internal refrigeration mechanism, so that the adhesive magnet is kept in a low-temperature state before and during the adhesive removal process, and the weakness of the surface magnetism of the magnet caused by high laser temperature is eliminated through the low temperature of the adhesive magnet.

An electronic device may include a proximity sensor for detecting whether an external object is in the vicinity of the device. The proximity sensor may have a light detector and a light source that can be reused for data communications. The light detector may be coupled to optical receiver circuitry, whereas the light source may be coupled to optical transmitter circuitry. The optical transmitter circuitry may include encoding circuits configured to convert electrical signals to optical signals. The optical receiver circuitry may include decoding circuits configured to convert optical signals to electrical signals. The optical signals can be encoded and decoded using pulse width modulation schemes or amplitude modulation schemes.

According to an aspect of the present invention, there is provided an optical receiver in an optical transmission system that transmits an optical signal between an optical transmitter and an optical receiver connected via an optical fiber transmission path, the optical receiver including: a channel distribution estimation unit that estimates channel distribution information in a transmission direction based on the optical signal transmitted from the optical transmitter and a reference signal; and a non-linear compensation unit that performs non-linear compensation based on the channel distribution information estimated by the channel distribution estimation unit.

A system for free-space optical coupling between a 2-dimensional optical transmitter array and a receiver array using planar optics. The system includes: a transmitter array configured to emit one or more light beams; a first planar optic configured to receive the light beams from the transmitter array and to generate one or more intermediate light beams; a first spacer disposed between the optical transmitter array and the first planar optics; a receiver array; a second planar optic configured to receive the intermediate beam and generate one or more output beams toward the receiver array; and a second spacer disposed between the second planar optical device and the light receiver array. The TX portion and the RX portion of the optical coupling system may act as a light emitter (beam manipulator) and a detector, respectively, in a LiDAR system. The planar optics are configured to provide a wide field of view for the LiDAR.

A method for configuring an optical transmitter for transmitting optical signals over a passive optical link. The method includes using a digital processor to generate a target constellation probability distribution (CPD) for a probabilistic constellation encoder (PCE) of the optical transmitter. The target CPD is generated using a system performance optimization algorithm accounting for the transmitter peak power constraint and a peak enhancement property of a drive circuit of the optical transmitter.

The invention relates to an optical fiber insertion loss and return loss test management system and method, an optical power detection module comprises an input optical power detection unit, an output optical power detection unit and a reflected light power detection unit, and further comprises an optical emission module, an optical switch matrix and a data processing module, and the optical emission module is a quantum dot tunable laser module; the optical switch matrix is a bionic optical switch matrix, and multi-channel optical path reconstruction is realized; the optical power detection module is internally provided with a multi-physical field sensing array and detects optical power data in real time; the data processing module is used for receiving the optical power data and processing the data; comprising a test module for acquiring optical power data based on the optical power detection module and calculating optical fiber insertion loss and optical fiber return loss according to the acquired optical power data. The technical problems that the insertion loss measurement error is influenced by temperature drift, the switching time of an optical switch is too long, the rapid detection requirement of a 5G bearing network for batch optical fibers is difficult to meet, the real-time sensing and compensation capability is lacked, and the test result is not accurate in a complex environment are solved.

An optoelectronic module includes a housing enclosing at least one optical transmitter or receiver and includes a release mechanism configured to engage with a cage sized and shaped to receive the housing. A cable connector for a fiber optic cable is configured to engage in a port of the module, and a slideable collar on the cable connector can keep the module engaged in the port. For example, the collar can hold tabs or arms inside the port engaged with slots or indents on a body of the connector to prevent the connector from being pulled from the port. A retainer is configured to prevent retraction of a collar on the cable connector so that the connector is not inadvertently removed from the port. By keeping the connector engaged, the retainer may by extension keep the module engaged in the cage by preventing inadvertent release of the release mechanism on the module.

The embodiment of the utility model relates to an optical emission module and an optical interconnection structure. The light emitting module comprises a first electric chip used for providing a driving signal; the laser is connected with the first electric chip and is used for emitting light under the action of the driving signal, and the light emitting direction of the laser deviates from the first electric chip; the light path adjusting unit is arranged on a light emitting path of the laser, and the light path adjusting unit is used for adjusting a light path of a light beam from the laser, so that a preset included angle is formed between emergent light and incident light of the light path adjusting unit.

The present invention relates to the field of optical components, and in particular to a multi-wavelength silicon optical transmitter chip, whose input waveguide is used to input dual-band optical signals. A first multimode interference coupler is connected to the input waveguide and is used to distribute the dual-band optical signals from the input waveguide to two transmission paths. Each transmission path includes a silicon optical modulator and two second multimode interference couplers. The silicon optical modulator is connected between the two second multimode interference couplers via a waveguide. The silicon optical modulator includes a reverse bias electrode and two high-frequency electrodes, the two high-frequency electrodes being located on opposite sides of the waveguide and connected to the waveguide, and the reverse bias electrode being located in the middle of the waveguide. The high-frequency electrode includes multiple sub-electrodes arranged along a first direction, each of the multiple sub-electrodes including a main body, a connecting portion, and an end portion. The connecting portion and the end portion are connected to one side of the main body along a second direction, and the connecting portion and the end portion form a T-shaped structure. The end portion extends toward the waveguide and is connected to the waveguide. High-speed signal modulation is achieved.

To provide an optical transport device that enable the strengths of optical signals to be recovered when the strengths of the optical signals vary, an optical transmission device comprises: a wavelength selection switch that attenuates, in accordance with an attenuation amount, each of a plurality of optical signals outputted from a plurality of optical transmitter, multiplexes and outputs the attenuated optical signals; and an optical detector that detects and compares the strength of at least one of the plurality of optical signals with a first threshold value and a second threshold value higher than the first threshold value. On the basis of the result of said comparison, the wavelength selection switch controls the attenuation amount such that the optical signal the strength of which has been detected has a strength value between the first threshold value and the second threshold value.

The invention provides an optical module and optical communication equipment, the optical module comprises a first optical transmitter, a second optical transmitter, a polarization beam combiner and an interface, the first optical transmitter is used for transmitting first signal light propagating along a first direction, and the polarization state of the first signal light is a first polarization state; the second light emitter is used for emitting second signal light propagating along a second direction, and the polarization state of the second signal light is a second polarization state; the polarization beam combiner is used for receiving the first signal light and the second signal light, combining the first signal light and the second signal light into mixed light, and transmitting the mixed light to the interface. On the basis of a wavelength division multiplexing scheme of a passive optical network at present, two optical transmitters are combined into one path by utilizing a polarization coupling scheme, so that the isolation degree between signal light of a current multi-transmission scheme is ensured, the complexity of an internal optical path is reduced, and a multi-transmission form optical module scheme with high transmission quality, low crosstalk and high integration level is realized.

An electronic device comprises a housing configured to contact a user's skin, an optical transmitter array, an optical receiver, a memory element and a processing element. The optical transmitter array outputs a plurality of optical signals that pass through the user's skin, each of the plurality of optical signals having one of three wavelengths. The optical receiver receives the optical signals and generates corresponding photoplethysmogram (PPG) signals. The memory element stores absorption constants for deoxyhemoglobin blood content, oxyhemoglobin blood content and glycated hemoglobin blood content, each absorption constant associated with one of the first wavelength, the second wavelength or the third wavelength. The processing element determines a glycated hemoglobin blood level for the user based on a ratio of a determined glycated hemoglobin blood content to a sum of determined deoxyhemoglobin blood content, a determined oxyhemoglobin blood content and a determined glycated hemoglobin blood content.

A system for free-space optical coupling between a two-dimensional optical transmitter array and a two-dimensional optical receiver array using planar optical elements includes a transmitter array configured to emit one or more optical beams, a first planar optical element configured to receive the optical beams from the transmitter array and generate one or more intermediate optical beams, a first spacer disposed between the optical transmitter array and the first planar optical element, a receiver array, a second planar optical element configured to receive the intermediate optical beams and generate one or more output optical beams directed to the receiver array, and a second spacer disposed between the second planar optical element and the optical receiver array. The TX and RX portions of the optical coupling system can be used in a LiDAR system as a light emitting element (beam steerer) and a detector, respectively. The planar optical element is configured to provide a wide field of view for the LiDAR.

A filtering unit for an optical communication system includes an optical band-pass filter that narrows pulses of modulated light emitted by an array of light sources in the communication system. The filtering unit can be included in an optical transmitter that includes the array of light sources, and a controller that receives data from a transmitting computer system and encodes and transmits it by modulating the visible light output by the array of light sources. The filtering unit can also be included in an optical receiver unit that includes a photodetector array to receive the modulated visible light; and a controller to receive the output of the photodetectors; decode data from the received output, and provide the decoded data to a receiving computer system.

An optical transmitter according to the technology of the present disclosure converts an occurrence probability of a symbol (X) into a histogram, and determines allocation of a DAC (121) on the basis of a cumulative frequency of the histogram, a class value of the histogram is a value of the symbol (X), a frequency is non-zero in any class, and a total number of the frequencies is a quantization number of the DAC (121).

The invention relates to a device for transmitting data via a rotating interface (1) with arrangements of optical transmitters (2) on a transmitter assembly (4) and an optical receiver (3) on a receiver assembly (5), wherein the transmitter assembly (4) is rotatable relative to the receiver assembly (5) about a common axis of rotation (6). The object of the invention is to enable a robust, scalable, easily assembled, and eccentrically arranged optical data connection in optical slip rings using economical standard components and without the use of fibers or light-distributing elements. This object is achieved according to the invention by the features of claim 1.

The utility model discloses a convenient-to-plug GPON OLT device, and relates to the technical field of communication devices. The optical transceiver comprises a mounting plate, a rotating assembly is arranged on the outer surface of the mounting plate, a clamping assembly is arranged in the rotating assembly, the rotating assembly is fixedly connected with the optical transceiver through the clamping assembly, an adjusting assembly is arranged at the bottom of the optical transceiver, and the adjusting assembly is used for driving the optical transceiver to rotate through the rotating assembly. According to the utility model, through the connection of the clamping assembly and the optical transceiver, the clamping assembly slides in the rotating assembly, when the optical transceiver is connected with the rotating assembly, the optical transceiver extrudes the clamping assembly, the clamping assembly is compressed and gets close to each other, and after the optical transceiver and the rotating assembly are connected in place, the clamping assembly resets and enters the interior of the optical transceiver. The optical transmitter and receiver and the rotating assembly are fixed together, and the optical transmitter and receiver can be installed only by directly pushing the optical transmitter and receiver to move, so that the operation is convenient, and the working efficiency can be improved.

An optical communication module, an optical communication system and a control method of an optical amplifier, the optical communication module comprising an optical transmitter, an optical amplifier and a control unit, the optical transmitter being configured to output a first optical signal to the optical amplifier. The optical amplifier is used for amplifying the first optical signal into a second optical signal and outputting the second optical signal to the control unit. And the control unit is used for acquiring a first gain spectrum of the second optical signal and a target gain spectrum of the optical amplifier, and adjusting the working temperature and / or the driving current of the optical amplifier until the similarity between the first gain spectrum and the target gain spectrum is greater than a first threshold value. The pre-tilt control of the optical amplifier is realized by adjusting the working temperature and / or the driving current of the optical amplifier, higher pumping power is not needed, and a device which can influence the optical amplifier does not need to be additionally introduced, so that additional insertion loss is not introduced, and the performance degradation of the whole optical communication system is avoided.

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.

An optical transmitter that multiplexes wavelength channels includes: a first light source; one or more second light source each having a different wavelength; collimator lenses coupled to respective outputs of the first and second light sources; an optical multiplexer that causes an output light beam from the first light source to be transmitted from a first end surface to a second end surface, causes the output light beam from the first light source to be reflected by a reflecting mirror, causes an output light beam from the second light source to pass through a wavelength filter, causes the output light beam from the second light source to be reflected by the reflecting mirror, and causes output light beams of the respective wavelength channels, to sequentially multiplex the output light beams of the respective wavelength channels; and beam splitters respectively inserted between the collimator lenses and the first end surface.

The disclosure relates to an optical transmitter (100) comprising: an optical part (110) carrying at least one optical lens (111a, 111b, 111c) configured to transmit an optical signal; a holder part (120) for holding the optical part (110); wherein the optical part (110) is aligned in a certain position (112, 113, 114) relative to the holder part (120) based on a transmission efficiency criterion of the optical transmitter (100); and an adapter part (130) fixing the optical part (110) in the certain position (112, 113, 114) relative to the holder part (120); wherein the adapter part (130) comprises at least one first fixing section (132) that is fixing the holder part (120) to the adapter part (130) by first laser welds (134); and wherein the adapter part (130) comprises at least one second fixing section (131) that is fixing the optical part (110) to the adapter part (130) by second laser welds (133).The disclosure further relates to a method for manufacturing such an optical transmitter.