476 results about "Optical receivers" patented technology

Medical systems, devices, and methods for determining whether a blood vessel is a vein or an artery. The system includes an optical fiber configured for insertion into a blood vessel coupled with a console having a light source, an optical receiver, processors, and logic stored in memory. The optical fiber includes sensors disposed along its length configured to determine a state or condition of the optical fiber. The state or condition can include a strain, movement, pressure, and / or temperature. The logic is configured to analyze reflected signals from the sensors to determine whether the optical fiber is inserted within an artery or within a vein. The logic may also determine a red-blue shift of a projected light to determine a blood flow direction with respect to the optical fiber.

Aspects of the subject disclosure may include, for example, obtaining a signal received at a coherent optical receiver, and equalizing the signal using a filter system, wherein the filter system includes a first filter that provides a first filtering characteristic, a second filter that provides a second filtering characteristic, and a third filter that provides a third filtering characteristic, wherein an adjustment rate of the first filter and an adjustment rate of the second filter are each at least ten times an adjustment rate of the third filter, and wherein the adjustment rate of the first filter is at least ten times the adjustment rate of the second filter. Other embodiments are disclosed.

A downhole tool system includes a bottom hole assembly that includes a connector; a laser head; a light source; a sensing assembly; and a controller. The connector is configured to couple to a downhole conveyance run into a wellbore to a reservoir rock formation. The laser head is configured to emit a laser beam toward the reservoir rock formation at a fixed frequency. The light source emitter is configured to emit a light beam toward the reservoir rock formation. The sensing assembly includes at least one optical receiver configured to (1) receive a reflected laser beam and a reflected light beam, and (2) interfere the reflected laser beam with the reflected light beam. The controller is configured to perform operations including generating a speckle interferogram based on the interference; and determining an angular displacement and an axial displacement of the wellbore based on the speckle interferogram.

Technology is disclosed for an optical receiver. The optical receiver may include an optical and digital signal processing (ODSP) device. The ODSP device may include a photodiode operable to convert an optical signal to an electrical signal; a digital signal processor operable to generate a digital signal based on the electrical signal; a quantization component operable to generate a quantized output signal based on the digital signal; and a processing device. The processing device may be operable to measure one or more signal statistics of the digital signal; and identify one or more quantization thresholds, wherein the one or more quantization thresholds are computed based on the one or more signal statistics.

The invention discloses an AFE analog front-end circuit applied to a multi-channel high-speed optical receiver. The circuit comprises an SF-TIA, a single-ended to differential circuit and a CLTE. The SF-TIA, the single-ended to differential circuit and the CLTE are connected in sequence; the SF-TIA is used for converting an input current signal into a voltage signal and transmitting the voltage signal to the single-ended to differential circuit; wherein the current signal is obtained by converting an input optical signal; the single-ended to differential circuit is used for converting the voltage signal into a differential voltage signal and transmitting the differential voltage signal to the CLTE; and the CLTE is used for compensating the high-frequency gain of the differential voltage signal to obtain a compensated voltage signal and outputting the compensated voltage signal. The amplifier has the advantages of being high in gain, low in power consumption, low in input impedance, low in noise, low in requirement for power supply voltage and simple in structure.

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.

Embodiments of the present disclosure may comprise a coherent optical receiver, where the coherent optical receiver comprises a PCSEL that generates a first and a second light beam. In accordance with various embodiments, the physical emission direction of the first light beam may be at an angle of 180 degrees, or 180 degrees plus / minus 10 degrees in some instances, to the physical emission direction of the second light beam. Embodiments may also comprise a first hybrid receiver that receives a first portion of an input light signal to the coherent optical receiver and the first light beam as a local oscillator signal, generating one or more first optical hybrid receiver output signals. Embodiments may also comprise a second hybrid receiver that receives a second portion of the input light signal to the coherent optical receiver and the second light beam as a local oscillator signal, generating one or more second optical hybrid receiver output signals.

An optical receiver includes a plurality of photodetectors, a shared memory, and a pulse calibration processing unit communicatively coupled to the shared memory. The optical receiver also includes a hardware accelerator module configured to accept input waveforms from the plurality of photodetectors and compare an amplitude of the respective input waveforms with a predetermined threshold. Based on the comparison, the hardware accelerator module could determine subsets of the input waveforms and determine information indicative of characteristic aspects of the subsets of the input waveforms. The optical receiver is additionally operable to store the determined information in the shared memory and trigger an interrupt for the pulse calibration processing unit to initiate a pulse calibration process on the determined information.

A composite semiconductor inspection system is provided, which includes a multi-axis sample stage, an optical measurement subsystem, an X-ray measurement subsystem and a processing device. The optical measurement subsystem includes a light source generator, an incident-end optical element group, a receiving-end optical element group and an optical receiver. The optical receiver is used to receive an optical signal to-be-measured and generate corresponding optical spectrum information. The X-ray measurement subsystem includes an X-ray generator, an X-ray optical element group and an X-ray detector. The X-ray detector is used to receive an X-ray signal to-be-measured and generate corresponding X-ray spectrum information. The processing device is configured to execute a fitting analysis program based on the optical spectrum information and the X-ray spectrum information to obtain structural parameters of a sample to-be-tested as analysis results.

The utility model discloses a self-calibration multi-grating monochromator. The self-calibration multi-grating monochromator comprises a self-calibration assembly, a grating spectrum system assembly and an optical receiver. The self-calibration assembly comprises a focus lens, a standard light source and a single-face reflector. And the standard light source is used for emitting a light beam with a specified wavelength to the single-sided reflector. And the single-sided reflector is used for reflecting the light beam to the focus lens, and the light beam is focused to the incident end of the grating spectrum system assembly through the focus lens. According to the utility model, an automatic calibration structure composed of the standard light source and the single-sided reflector is arranged at the incident end of the grating spectrum system assembly, so that the monochromator can emit a light beam with a specified wavelength through the standard light source when being used for a long time, and automatic calibration of the grating spectrum system assembly is realized in cooperation with the light receiver. Besides, the single-sided reflector is installed on the sliding rotary table, so that the single-sided reflector gives way when the grating spectrum system assembly is normally used, and interference with external light is avoided when the grating spectrum system assembly is normally used.

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.

An optical communication receiver system for a mobile platform includes: a surface having an entrance aperture for entry of an optical communication signal from a remote source; an optical receiver to receive the optical communication signal through the entrance aperture; a reflective layer over at least a portion of the surface to at least partially reflect an alignment beam that is substantially coincident with the optical communication signal; a camera positioned to detect the reflected alignment beam; a processor to determine alignment information about the alignment beam relative to the entrance aperture based on the reflected alignment beam detected by the camera; and a transmitter to transmit the alignment information to the remote source to enable the remote source to center the optical communication signal in the entrance aperture.

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 downhole tool system includes a bottom hole assembly that includes a connector, a laser head, a light source emitter, and a sensing assembly. The connector is configured to couple to a downhole conveyance run into a wellbore to a reservoir rock formation. The laser head is configured to emit a laser beam toward the reservoir rock formation at a fixed frequency. The light source emitter is configured to emit a light beam toward the reservoir rock formation. The sensing assembly includes at least one optical receiver configured to (1) receive a reflected laser beam and a reflected light beam, and (2) interfere the reflected laser beam with the reflected light beam to generate an interferogram. The system includes a controller configured to perform operations including determining one or more wellbore characteristics based on the interferogram.

A sample interval synchronized position notification device includes: a tap coefficient acquisition unit configured to acquire a tap coefficient from an adaptive equalization unit which is configured to perform adaptive equalization of a signal; a group delay calculation unit configured to calculate a group delay based on the tap coefficient; and a shift amount calculation unit configured to calculate a shift amount based on the group delay.

The utility model provides a laser radar circuit and laser radar equipment, and relates to the technical field of laser radars. The laser radar circuit comprises a controller, a receiving module, a transmitting module and a digital processing module. The control module is electrically connected with the receiving module, the transmitting module and the digital processing module. The receiving module comprises a receiver and a matching capacitor. The capacitance value of a parasitic capacitor of the receiver is equal to the capacitance value of the matching capacitor. In the laser radar circuit provided by the invention, the capacitance value of the parasitic capacitor of the receiver is equal to the capacitance value of the matching capacitor, so that impedance matching can be more effectively realized, signal reflection and transmission loss can be reduced, noise in the circuit can be reduced, the signal-to-noise ratio of signals can be improved, electromagnetic interference can be effectively reduced, and the reliability of the laser radar circuit can be improved. The background noise of the optical receiver is effectively reduced, and the overall performance of the laser radar system is improved.

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 application generally relates to a polarimetric wavefront light detection and ranging (PolLidar) sensor. The PolLidar sensor includes an emitter module having an optical emitter aperture, a receiver module having an optical receiver aperture, and a mirror for scene scanning. The receiver module is separate from the emitter module.

An optical module provided by the present disclosure comprises a circuit board, an optical receiver chip, a TIA chip, a signal processing chip, and an MCU. The signal processing chip comprises a channel configuration register. The MCU comprises a control pin, the control pin being electrically connected to the signal processing chip. When the MCU detects for the first time that a clock signal offset recovered by the signal processing chip is lower than a preset threshold during a power-on process of the optical module, the MCU writes a first register value into the channel configuration register by means of the control pin, so as to disable the signal processing chip receiving a photovoltage signal output by the TIA chip. After a preset period of time, a second register value is written into the channel configuration register by means of the control pin, so as to start the signal processing chip receiving the photovoltage signal output by the TIA chip. When the signal processing chip is locked for the first time, the MCU actively intervenes so as to forcibly interrupt a receiving link of the signal processing chip, thereby effectively isolating a signal instability period during the power-on process, such that the signal processing chip is locked back into a more stable parameter.

This optical fiber wireless transmission system comprises: an optical transmitter (10) that converts a wireless signal and a monitoring swept-frequency signal in a frequency band different from the frequency band of the wireless signal into an optical signal having an intensity and outputs the optical signal as transmitted signal light; an optical receiver (20) that receives the transmitted signal light from the optical transmitter (10) via an optical fiber (40); and an optical fiber deterioration monitoring device (30) that converts backscattered light of the transmitted signal light from the optical transmitter (10) caused by the optical fiber into an electrical signal, detects the monitoring swept-frequency signal as a reference signal, and performs arithmetic processing to obtain an impulse response.

An adjustable bandwidth current-to-voltage converter for use in an optical receiver includes an input configured to receive current from a photodetector; an amplifier stage connected to the input; a feedback path connected to the amplifier stage and to an output, wherein the feedback path includes a feedback element and an operating mode switch configured to set one of photodetector amplifier with dynamic load (PADL) mode and an integrate-and-dump (I&D) mode. The PADL mode is for higher baud operation than the I&D mode.

Optical system (1) comprising a primary optical sensor (3) which is protected against environmental influences by an optically transparent protective cover (2), wherein the optical system (1) comprises a contamination detection system (4), wherein the contamination detection system (4) comprises at least one optical transmitting unit (5, 6) and at least one optical receiving unit (7, 8), wherein a first transmitting unit (5) is configured to couple a first light signal into the protective cover (2) in such a way that the first light signal propagates in a directed manner with at least one total internal reflection within the protective cover (2) on a first propagation path (9), wherein a first receiver unit (7) is configured to couple out and receive the first light signal from the protective cover (2) at one end of the first propagation path (9), wherein the contamination detection system (4) is configured to detect contamination (11) on a surface of the protective cover (2) along the first propagation path (9) by comparing the first light signal received by the first receiver unit (7) with an expected first light signal, wherein the optical system (1) is configured such that by rotating and / or shifting the contamination detection system (4) the first propagation path (9) within the protective cover (2) is shifted and / or rotated so that the contamination detection system (4) detects contamination (11) along the surface of the protective cover (2) swept by the first propagation path (9); characterized by the fact that the contamination detection system (4) comprises a second optical transmitting unit (6) and a second optical receiving unit (8) which, according to the first propagation path (9), form a second propagation path (10) through the protective cover (2) by means of a second light signal, wherein the second propagation path (10) differs from the first propagation path (9).

Disclosed herein are methods and systems for routing traffic. One exemplary system includes a muxponder module deployed in an optical network, the muxponder having an optical receiver, a first and second electrical port, a demultiplexer having a built-in digital cross-connect, and a processor accessing a first calculated carrier frequency to assign traffic streams associated with a first service identification code to a first and second host lane of the first electrical port, and a second calculated carrier frequency to assign traffic streams associated with a second service identification code to a third and fourth host lane of the second electrical port, and having logic to control the digital cross-connect to route a first and a second traffic stream to the first electrical port based on the first service identification code, and a third and a fourth traffic stream to the second electrical port based on the second service identification code.

The sensor module (1) comprises an optical sensor element (2) and an evaluation circuit (3). The optical sensor element (2) comprises at least one optical transmitter (21) and at least one optical receiver (22). The optical sensor element (2) is configured for contactless communication with an optical interface (110) of an electronic device (100). The optical sensor element (2) is further configured to optically detect at least one sensing parameter. An evaluation circuit (3) is electrically connected to the optical sensor element (2) and is configured to determine at least one sensing parameter. For example, the at least one optical emitter (21) is a micro LED or any photoemitter.

This invention provides an integrated wavelength division multiplexing (WDM) CPO device, which can improve the space utilization of the product, while improving heat dissipation performance and ensuring that the product performance is not affected. The PCB circuit board has mounting bases arranged on it, with linearly arranged optical receiver mounting slots and optical transmitter mounting slots, which are inclined. The optical receiver and optical transmitter are respectively placed in the optical receiver mounting slots and optical transmitter mounting slots. After being connected to LC connectors, the optical receiver and optical transmitter are optically connected to a multiplexer and a demultiplexer via optical fibers. The multiplexer and demultiplexer are connected to optical ports via optical fibers. The optical receiver and optical transmitter are also electrically connected to electrical chips on the PCB circuit board via a flexible circuit board. The PCB circuit board is connected to electrical ports and power supply interfaces. The mounting base is connected to a heat sink, allowing the optical receiver and optical transmitter to conduct heat to the housing for heat dissipation through the heat sink and / or the mounting base.

A detection device includes a sound generator, an optical transmitter, a compound waveguide, an optical receiver, a processor, and a housing element. The sound generator generates a sound signal. The optical transmitter generates an incident light signal. The compound waveguide transmits the sound signal and the incident light signal to a human body portion. Thus, the human body portion transmits a reflected light signal back to the compound waveguide. The compound waveguide further generates a mixed light signal according to the incident light signal and the reflected light signal. The optical receiver receives the mixed light signal. The processor is coupled to the optical receiver. The processor obtains the physiological information of the human body portion according to the mixed light signal. The sound generator, the optical transmitter, the compound waveguide, the optical receiver, and the processor are disposed inside the housing element.

An optical transceiver (200) includes a fiber-laser transmitter (202) configured to transmit a transmit beam (206) toward a target (208) and transmitter optics (204) optically coupled to the fiber-laser transmitter. The optical transceiver also includes an optical receiver (212) configured to receive a return beam (210) and an adaptive active modifier (222) optically coupled to the optical receiver. The optical transceiver further includes a local oscillator (214) optically coupled to the optical receiver and adaptive active modifier. In addition, the optical transceiver includes at least one processing device coupled to the fiber-laser transmitter and adaptive active modifier. The at least one processing device (302) is configured to cause the optical transceiver to turn off the local oscillator during an initial time interval, emit a stream of laser pulses using the fiber-laser transmitter during the initial time interval toward the target, measure the return beam, and determine a translational velocity of the target.

In order to detect occurrence of an influence on quality of an optical signal due to a non-linear effect of an optical fiber, an optical receiver includes: a demodulation unit that demodulates a received optical signal and outputs a reception signal, and calculates a quality value indicating quality of the optical signal; an extraction unit that extracts, from the reception signal, transmission power being a value indicating optical power at a time of transmitting the optical signal; an arithmetic unit that determines a change rate of the quality value to the transmission power; and a monitoring unit that determines, based on a comparison result between the change rate and a predetermined threshold, an influence of a non-linear effect in the optical signal.

In one embodiment, a system includes a first light source configured to produce a first beam of light at a first frequency and a second light source configured to produce a second beam of light at a second frequency, where the first and second frequencies are offset by a frequency offset Ω. The system also includes one or more optical elements configured to: direct the first and second beams of light to a sample, and collect a Raman signal produced by the sample in response to the first and second beams of light. The system further includes an optical receiver configured to detect the Raman signal. The optical receiver includes a third light source configured to produce a third beam of light at a third frequency, where the third light source includes a wavelength-tunable laser, where the third frequency is adjustable.