44 results about "Optical transmitter" patented technology

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 wear sensor (1) for identifying the extent of wear of mining or similar equipment. The sensor (1) includes a probe (5) having one or more optical element (10), a deflector (4), and a transmitter / detector, and a base (6) which includes a processor (81) and wireless transmitter (33). The optical element (1) is provided within a body of a wear part (11) and has a first end and a second end defining a bi-directional optical signal transmission pathway (3). The optical deflector (1) is formed of deflective material and positioned at said second end of said optical element (10) to reflect the optical signal. The optical transmitter (18) / detector (19) is configured to transmit said optical signal from the first end of said optical element (1), and detect whether or not said optical signal is returned via said optical pathway to said first end of said optical element (10). The processor converts any optical signal received by said optical detector to an electrical response signal, and the wireless signal transmitter (33) transmits the electrical response signal indicative of the wear condition of said body (11) to an output device. A plurality of optical elements (10a - 10e), of differing lengths may be provided to identify the depth or extent of wear.

This invention provides a near-infrared therapy device for improving Alzheimer's disease, characterized by comprising: a frequency-modulated drive circuit 1, a near-infrared LD light source 2, an optical fiber coupler 3, a light source power monitoring photodetector (PD) 4, an optical power monitoring circuit 5, an optical fiber beam splitter 6, an MPO optical fiber cable 7, and an optical transmitter 8. The optical transmitter includes an optical transmitter housing 8-1, a fiber-end hemispherical emitting microlens 8-2, and a beam-shaping coupling lens 8-3. This invention can be used to regulate the metabolism and cellular function of meningeal lymphatic endothelial mitochondrial cells, promote meningeal lymphatic transport in the central nervous system, thereby alleviating the pathological symptoms of Alzheimer's patients and enhancing their cognitive function. The device has a simple and compact structure, is easy to plug and unplug, has low optical signal loss, and high coupling efficiency. It can be widely used in novel non-invasive optical brain-computer interface devices and belongs to the field of fiber optic sensing technology.

An optical transmitter for quantum key distribution. The transmitter comprises a first and a second. Each laser is configured to emit phase-randomised pulses. The transmitter further comprises an optical combiner configured to combine the pulses emitted from the first and second laser into a combined stream of pulses based on an adjustable combining ratio. The transmitter further comprises a Mach-Zehnder interferometer with a short and a long arm. The interferometer has an input port configured to receive the combined stream of pulses and an output port configured to provide an output of the interferometer. At least one of the arms comprises a phase controlling element to control a phase between the short and long arm.

The utility model discloses mobile optical transmitter mobile device relates to optical transmitter mobile device technical field, including laser system, and laser system includes: two wheel frame's self -balancing carrier platform, laser strike system and be used for the vibration isolation system of flexible connection self -balancing carrier platform and laser strike system, adopt two wheel frame's self -balancing carrier platform, and it is small and exquisite and possesses self -balancing function, can be flexible movement and quick deployment in complex terrain, has improved the mobile performance and environmental adaptability of device, through active electromagnetic vibration isolation system, self -balancing carrier platform is connected with laser strike system, can effectively offset the vibration interference in the process of carrier driving, in addition, the laser strike system of the application adopts modular integrated design, contains the module of the cooperation of common aperture optical design system, focusing system etc., has strengthened the scene adaptability, can satisfy the diversified application demand of low altitude economy field.

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.

This invention belongs to the field of radar wind measurement technology, specifically a sentinel lidar wind measurement device. It includes a servo motor mounted on the top outer wall of the housing. The output shaft of the servo motor is fixedly connected to a rotating plate via a coupling. A first electric push rod is hinged to the inner wall of the rotating plate. The piston rod of the first electric push rod is hinged to a support plate. An optical transmitter is mounted on the top outer wall of the support plate, and a top cover is installed on the top outer wall of the optical transmitter. A storage frame is welded to the top outer wall of the top cover. This invention uses the servo motor to drive the rotating plate to rotate, which, in conjunction with the first electric push rod, pushes the support plate to adjust the angle. This enables the optical transmitter to perform 360° horizontal rotation and multi-angle pitch adjustment, solving the problem of fixed detection angle in traditional devices and improving the all-round monitoring coverage capability of the "sentinel." The cleaning component can automatically clean the top cover, solving the problems of high cost and reduced accuracy associated with manual cleaning.

The present invention provides an optical transmission system and transmitter that transmit a signal that stably restores the carrier phase of a signal that has undergone THP (Tomlinson-Harashima Precoding) processing. [Solution] An optical transmission device comprising an optical transmitter and an optical receiver that receives signal light transmitted from the optical transmitter via a transmission path, wherein the optical transmitter generates a first digital signal comprising a first signal corresponding to a pilot symbol and a second signal corresponding to a data signal, and a second digital signal comprising a third signal comprising information regarding the carrier phase of the first signal after THP processing is performed, performs THP processing on the second digital signal, and transmits signal light generated based on the third digital signal, which is the processed signal, to the transmission path. The optical receiver receives the signal light from the transmission path and compensates for errors in the second signal based on the first signal and the third signal of the third digital signal generated based on the received signal light.

A fiber matrix includes a plurality of input terminals, a plurality of output terminals, and a controller. A first input terminal of the plurality of input terminals receives an optical signal having a specified transmission rate from an optical transmitter, wherein the optical transmitter corresponds to a first video standard. The plurality of output terminals includes a first output terminal. A correspondence is configured between the first input terminal and the first output terminal, and the controller switches the first input terminal to the first output terminal in accordance with the correspondence, wherein the first output terminal is configured to output the optical signal from the first input terminal to an optical receiver, wherein the optical receiver corresponds to a second video standard.

This invention relates to the field of optical communication technology and proposes an optoelectronic fusion transmitter and method based on all-silicon technology. The transmitter includes an optical transmitter, an all-silicon photodetector, and a control circuit. The all-silicon photodetector performs real-time in-situ acquisition of multi-wavelength random polarization modulation signals and optical signals from internal nodes of the optical transmitter. The optical signals are converted into monitoring electrical signals and sent to the control circuit. The all-silicon photodetector is a serpentine waveguide avalanche photodetector. An avalanche multiplication region with a reverse bias voltage is configured at the starting end of the serpentine waveguide. As the optical signals from internal nodes of the optical transmitter propagate along the serpentine waveguide, they are absorbed segment by segment, generating primary photogenerated carriers. These carriers are amplified by the avalanche multiplication effect in the high-field region to form the monitoring electrical signal. By employing an all-silicon photodetector, polarization management, multi-wavelength channel allocation, electro-optic modulation, and closed-loop power control are integrated onto a unified all-silicon technology platform, improving the integration level.

Embodiments of the present application provide an optical device, an optical communication network, and a method for detecting the position of a reflection point in an optical link, aiming to improve the quality of optical communication. The specific solution is as follows: the optical device comprises an optical transmitter, a first light splitting unit, and a reflection unit; the optical transmitter emits first signal light; the first light splitting unit transmits the first signal light, and further splits second signal light into a first light beam and a second light beam, wherein the second signal light is at least part of the first signal light reflected by a first optical link; the reflection unit reflects the first light beam back to the first light splitting unit; the first light splitting unit further transmits the light beam outputted by the reflection unit; a characteristic peak of the light beam outputted by the first light splitting unit is detected, the reflectivity of the reflection unit is changed to update the characteristic peak, and the characteristic peak having varying peak intensity is analyzed to obtain the distance between the reflection unit and a reflection point, so as to obtain the position of the reflection point in the optical link. Repair or replacement of the reflection point can effectively improve the communication quality of the optical link.

A measuring device includes: a Doppler lidar unit, the Doppler lidar unit including an optical transmitter operable to transmit a signal, and an optical receiver operable to receive a backscattered signal, the backscattered signal including a portion of the signal; the measuring device further includes a processor operable to: determine a Doppler frequency shift between the signal and the backscattered signal; and use the Doppler frequency shift to determine the volumetric flow rate of a fluid to which the signal is directed and from which the backscattered signal is received.

The optical module provided in this application includes a circuit board, an optical transceiver assembly, an optical transmitter assembly, an optical receiver assembly, and an optical fiber adapter. The front side of the circuit board has first and second data processors. The optical transceiver assembly includes a housing, an optical transmitter, and an optical receiver. The housing includes stacked first and third cavities, which are rigidly connected to the optical fiber adapter via optical ports. One end of the circuit board is inserted into the first cavity, where the optical transmitter is located and electrically connected to the first data processor. The optical receiver is located in the third cavity and electrically connected to the first data processor. The optical transmitter assembly is located on the front side of the circuit board, and the optical receiver assembly is located on the back side. One end of the optical transmitter and receiver assemblies is electrically connected to the second data processor, and the other end is connected to the optical fiber adapter via an optical fiber pigtail. This application optimizes the internal circuitry and optical engine layout of the optical module, reducing the volume occupied by multiple sets of optical transmitter and receiver assemblies, which is beneficial for the miniaturization of the optical module.

Embodiments of the present application provide a kind of optical device, optical communication network and the position detection method of reflection point in optical link.The quality of optical communication is improved.The specific scheme includes: the optical device includes optical transmitter, first light splitting unit and reflection unit.Optical transmitter emits first signal light.The first light splitting unit transmits first signal light, and the first light splitting unit also splits second signal light into first light beam and second light beam.Second signal light is at least part of first signal light reflected by first optical link.Reflection unit reflects first light beam back to first light splitting unit;First light splitting unit also transmits the light beam output by reflection unit.Detect the characteristic peak of the light beam output by first light splitting unit, change the reflectivity of reflection unit to update the characteristic peak, analyze the characteristic peak of peak intensity change, obtain the distance between reflection unit and reflection point, to obtain the position of reflection point in optical link.Repair or replace reflection point can effectively improve the communication quality of optical link.

In one embodiment, a method includes obtaining a standard pattern for use in testing an optical transmitter, and modifying the standard pattern to create a modified pattern. The modified pattern is provided to the optical transmitter. The method also includes testing the optical transmitter, wherein testing the optical transmitter include implementing the modified pattern and obtaining at least one measurement after implementing the modified pattern.

This application discloses a chromium plate photomask cleaning device. The chromium plate photomask cleaning device includes a vacuum cleaning chamber, a photomask supporting mechanism, a light emitting mechanism, and a residue collection mechanism. The vacuum cleaning chamber allows the chromium plate photomask to enter and exit, and remains sealed during the cleaning process. The photomask supporting mechanism is located within the vacuum cleaning chamber and is used to fix the chromium plate photomask. The light emitting mechanism emits light rays that dissolve residues on the chromium plate photomask; the light rays are reflected by the chromium layer and substrate mirror of the chromium plate photomask. The residue collection mechanism communicates with the interior of the vacuum cleaning chamber and collects the dissolved residues. Therefore, the chromium plate photomask cleaning device can effectively clean photoresist and other residues without damaging the chromium layer and quartz substrate of the chromium plate photomask, and also offers high cleaning efficiency.

The present disclosure relates to multi-channel optical transmitters and apparatuses in WDM transmission systems. A GT etalon-based dispersion compensator is disclosed that can be utilized in combination with a wavelength division multiplexer at the transmitter location to provide a degree of pre-compensation for signals operating at wavelengths known to experience dispersion between the transmitter and receiver locations. The GT etalon-based dispersion compensator utilizes a separate dispersion compensator configured as a transmissive device by using a polarization beam splitter, a GT etalon, and a pair of quarter-wave plates in a manner such that the output signal path remains collinear with the input signal path and also preserves the linear polarization state of the propagating signal. Multiple of these transmissive dispersion compensators can be cascaded in a back-to-back arrangement within the signal path of a particular channel to provide a greater degree of pre-compensation for wavelengths known to be more susceptible to dispersion compensation.

The present invention is a fiber optic transmission system including an optical transmitter and an optical receiver. The optical transmitter receives a first video electrical signal corresponding to a first video standard and converts the first video electrical signal to an optical signal having a specified transmission rate. The optical receiver receives the optical signal having the specified transmission rate from the optical transmitter and converts the optical signal to a second video electrical signal corresponding to a second video standard.

The utility model discloses a multifunctional numerical control laser texturing lathe, including lathe, laser emission mechanism, base, dust absorption board, dust collecting box, the inside setting of lathe has rotating motor, the output of rotating motor is tightly connected with the lead screw, the surface screw thread connection of lead screw has the sliding seat, the bottom of sliding seat is provided with laser emission mechanism, the inside setting of lathe has the heat dissipation bin, the inside setting of heat dissipation bin has the fan, the bottom of lathe is provided with base, one side of base is provided with control bin, the inside setting of control bin has the screw rod, the surface screw thread connection of screw rod has the moving seat, one side of moving seat is provided with dust absorption board, the utility model discloses, through condenser, gas is blown out after heat dissipation, cold air is used for cooling work piece, avoids the deformation of work piece heat generation, secondly, the cold air blows the chip produced in processing to one side of dust absorption board, and dust absorption board is collected faster.

Embodiments of the present disclosure relate to the technical field of optical transmission networks, and provide a clock synchronization device, an optical transmitter, and an optical receiver. The clock synchronization device comprises: a phase detection module configured to obtain first total phase error information on the basis of a service recovery clock and a first phase-locked clock, wherein the first phase-locked clock is obtained from a first phase-locked loop of a digital-to-analog converter; and a loop filter configured to obtain first adjustment information on the basis of the first total phase error information, so that the first phase-locked loop obtains a second phase-locked clock on the basis of the first adjustment information, and the digital-to-analog converter converts service data into analog data on the basis of the second phase-locked clock, wherein the service recovery clock is a sampling clock for the service data.

The invention relates to an optical transmitter and receiver module (100), which includes: - an optical fibre (10), - a substrate (50) for positioning the optical fibre, - a light source (20), - a photodetector (30), and - an optical element (40). A first side face (55) of the substrate (50) and a first end face (14) of the optical fibre together form a common face. The optical element (40) includes an input face (41) on which a dichroic filter (45) is deposited, the input face being arranged to face the common face. The common face has two successive planar portions: - a first planar portion (91) defining a plane having an angle β relative to a plane (P) perpendicular to an optical axis of the optical fibre, and - a second planar portion (92) defining a plane having an angle α with respect to the optical axis.

This application relates to the field of optical communication technology, and more particularly to a segmented polarity detection device for the signal transmission path of a PAM4 optical module, comprising a bit error rate tester, a power divider, a beam splitter, a signal display, and a test board; the detection signal output terminal of the bit error rate tester is connected to the input terminal of the power divider; the first signal output terminal of the power divider is connected to the first signal input terminal of the signal display; the second signal output terminal of the power divider is connected to the input terminal of the test board, and the output terminal of the test board is connected to the second signal input terminal of the signal display; the beam splitter includes an input terminal connected to the optical transmitter of the PAM4 optical module, a third signal output terminal connected to the optical receiver of the PAM4 optical module, and a fourth signal output terminal connected to the third signal input terminal of the signal display; the signal display is used to display the code patterns of the signals input to the first, second, and third signal input terminals. This device can effectively detect potential polarity errors in the signal transmission path of the PAM4 optical module.

The application discloses a low-latency chip-level optoelectronic hybrid integrated network and a communication method thereof, and belongs to the technical field of communication, comprising: a plurality of dies, the upper surface of each die comprising a plurality of cluster structures; each cluster structure comprising a plurality of communication cores and one routing node; the lower surface of each die comprising a signal processing unit, a plurality of optical transmitters and a plurality of optical detectors; the signal processing unit being electrically connected with the plurality of optical transmitters and the plurality of optical detectors; further comprising: a substrate, the substrate comprising an inner ring optical waveguide bus, an outer ring optical waveguide bus and a plurality of optical interfaces; the inner ring optical waveguide bus and the outer ring optical waveguide bus being provided with optical signals of a plurality of wavelengths; the substrate being located below the plurality of dies, and two optical interfaces being arranged below each die. The application realizes non-blocking optical signal transmission through the combination of optical interfaces and optical waveguide buses, and reduces the transmission latency of optical communication.

A networked system includes networking devices, networked devices, and an electrical / optical communication conversion aggregator system. A chassis of the electrical / optical communication conversion aggregator system houses optical transmitter subsystems that are each coupled to a respective one of the networked devices via a respective electrical connection and to each of the networking devices via a respective optical connection, and optical receiver subsystems that are each coupled to each of the networking devices via a respective optical connection and to a respective one of the networked devices via a respective electrical connection. Each optical transmitter subsystem converts electrical communications received from its connected networked device to optical communications that it transmits to any of its connected networking devices, and each optical receiver subsystem converts optical communications received from any of its connected networking devices to electrical communications that it transmits to its connected networked device.

A LIDAR system includes a first optical transmitter comprising a plurality of first emitters, where each of the plurality of first emitters is positioned to generate an optical beam with a FOV at a target range when energized. A second optical transmitter includes a plurality of second emitters, where each of the plurality of second emitters is positioned to generate an optical beam with a FOV at the target range when energized. The first and second optical transmitters are positioned relative to each other so the FOVs of at least some of the optical beams generated by the first and second optical transmitter when energized overlap at the target range. An optical receiver includes a plurality of optical detectors, where a respective one of the plurality of optical detectors is positioned to detect a respective optical beam generated by at least one of the first and second optical transmitter and reflected by a target in the FOV at the target range. A controller includes a first and second output being connected to respective control inputs of the first and second optical transmitters, and a third output being connected to a control input of the optical receiver. The controller generates control signals at the first and second outputs that control energizing select ones of the plurality of first and the plurality of second emitters that generate optical beams with the FOVs that overlap at the target range and generating a control signal at the third output that activates selected ones of the plurality of optical detectors to detect optical beams reflected from an object at the target range.

An optical signal transmission device and method based on digital predistortion in a symbol domain is provided. The optical signal transmission device includes: a memory; and a processor coupled to the memory to control execution of a process to: perform digital predistortion processing on a symbol sequence of a signal to be transmitted to obtain a digital predistortion processed signal; perform short-pulse shaping processing on the digital predistortion processed signal to obtain a short-pulse shaping processed signal, wherein a memory length introduced by the short-pulse shaping processing is less than or equal to a memory length of the optical transmitter; and generate and transmit an optical signal based on the short-pulse shaping processed signal.