176 results about "Optical power meter" patented technology

The application discloses a scanning method of a scanning optical fiber displacement sensor and belongs to the technical field of optical fiber displacement sensors; S1: a scanning platform is established; S2: a scanning surface and the area of the scanning surface are determined; scanning light passes through a lens in a voice coil motor to output laser to irradiate on a to-be-scanned object; diffuse reflection occurs on the to-be-scanned object; after the scanning platform receives the reflected information light of the to-be-measured object, the voice coil motor is used to move the laser to a next position, and the scanning surface of the to-be-measured object is scanned; S3: in the scanning process, the displacement information d of the to-be-measured object is calculated and acquired by means of the reflected light power of the scanning surface and the light power emitted by the scanning platform. The present application improves the existing point type optical fiber displacement sensor into a scanning optical fiber displacement sensor, and the surface scanning is more accurate than single-point scanning, and the change of the object in the direction can be measured.

The invention relates to the technical field of data processing, and discloses a gateway service integrated management method and system based on an FTTR demand. The method comprises the following steps: carrying out topology scanning on a test signal of an optical time domain reflectometer to obtain a room-level FTTR topology mapping table, carrying out feature extraction on service traffic of each room according to deep packet inspection to obtain a room function identification tag library, and carrying out attenuation compensation on a corresponding room optical port by an optical power meter to obtain an FTTR link quality evaluation matrix, and bandwidth allocation is carried out through a reinforcement learning algorithm to obtain a room-level QoS strategy configuration set, and building data interaction is carried out based on an MQTT protocol to obtain an FTTR gateway service integrated management scheme. According to the invention, the intelligent level of FTTR network room-level management and the resource allocation efficiency are improved. According to the invention, the real-time performance of optical fiber link quality monitoring and the collaboration of building network management are improved.

The invention provides a high-parallelism test method of an optical comprehensive test platform, relates to the field of active optical testing, and aims to realize parallel testing of multiple tested objects or multiple test items through N independent test channels, avoid waiting time of traditional serial testing, and effectively improve manufacturing efficiency by combining the high-parallelism characteristic of the platform. Dynamic resource scheduling distributes tasks based on channel resource states monitored in real time, resource idling is avoided, the characteristic of high integration of a platform is matched, multiple modules share the platform, cost is effectively shared, the overall utilization rate of equipment is improved, modules such as optical power meters and variable optical attenuators integrated in all channels in a hardware architecture support hot plugging, and the overall performance of the equipment is improved. And the task analysis algorithm can flexibly map test items, adapt to requirements of different tested objects, conform to the advantages that the platform is matched as needed and easy to expand, can protect investment and adapt to dynamic changes of a test scene, and a distributed data acquisition mechanism synchronously acquires data of each channel and provides support for generating a reliable test report.

The invention belongs to the technical field of optical communication testing, and provides a multichannel synchronous optical wavelength scanning test module and a data fusion system thereof, the multichannel synchronous optical wavelength scanning test module comprises a scanning light source, a multichannel scanning optical power meter, a wavelength analysis unit, a polarization controller, a trigger synchronization unit and an integrated platform; the scanning light source is configured to provide a basic light source; the multi-channel scanning optical power meter is configured to measure optical power of a plurality of channels at the same time to obtain optical power data; the wavelength analysis unit is configured to perform wavelength analysis on the optical signal output by the basic light source so as to determine the wavelength value of the optical signal; the trigger synchronization unit is configured to realize linkage control between the scanning light source and the polarization controller to form polarization state-wavelength cooperative scanning so as to synchronously complete wavelength scanning and switching of multiple polarization states; the integrated platform is configured to perform unified control and management; according to the invention, high-precision and high-efficiency multichannel optical wavelength scanning test can be realized.

The application discloses a quantum random number generator based on feedback adjustment of a comparator threshold value and a random sequence generation method. The quantum random number generator comprises a superluminescent diode, a filter, an erbium-doped fiber amplifier, a fiber coupler with a coupling ratio of 50:50, an optical delay line, a first beam splitter and a second beam splitter with the same splitting ratio, a first optical power meter and a first photodetector connected with the first beam splitter, a second optical power meter and a second photodetector connected with the second beam splitter, a microcontroller connected with the first optical power meter and the second optical power meter, and a comparator connected with the microcontroller, the first photodetector and the second photodetector. The first photodetector and the second photodetector are connected with the comparator through a differential circuit. The application adjusts the threshold voltage to offset the influence of the output characteristics of a light source on the output random number.

The invention discloses a virtual simulation teaching system based on SDH (Synchronous Digital Hierarchy) equipment. The virtual simulation teaching system comprises mixed reality head display equipment, an SDH equipment simulation device and a data service device, the SDH equipment simulation device is used for constructing an SDH equipment simulation model, an optical power meter simulation model and an optical attenuator simulation model; the SDH equipment simulation device is further used for transmitting the SDH equipment simulation model, the optical power meter simulation model and the optical attenuator simulation model to mixed reality head display equipment, and the mixed reality head display equipment is used for displaying a virtual SDH equipment simulation model, a virtual optical power meter simulation model and a virtual optical attenuator simulation model; the data service device is used for providing a video tutorial of an SDH equipment simulation model principle, a video tutorial of alarm processing and a document for the mixed reality head-mounted display equipment; according to the invention, the problem of insufficient precision of the simulation model of the virtual SDH equipment is solved, interaction with the simulation model of the virtual SDH equipment is realized, and the practical operation ability of students is improved.

A photoelectric converter sensitivity adjusting device and method, comprising a light source module, a shielding cage, an optical fiber bundle, an optical power meter, a power supply, a photoelectric converter and a voltmeter, the light source module is used to generate test light, one end of the shielding cage is provided with a small hole for receiving the test light, the other end is provided with an optical fiber bundle connector connected with the optical fiber bundle, the test light entering the shielding cage from the small hole enters one end of the optical fiber bundle from the optical fiber bundle connector, the optical power meter is used to test the optical power emitted from the other end of the optical fiber bundle, the photoelectric converter has an optical fiber bundle connector and an output signal line, the optical fiber bundle connector is used to be detachably connected to the other end of the optical fiber bundle, and the voltmeter tests the output voltage of the photoelectric converter; the photoelectric converter is provided with a sensitivity adjusting resistor, and the output voltage can be changed under the same light intensity excitation. The device can shield the interference of environmental light in ordinary experimental environment, accurately adjust the sensitivity of the photoelectric converter, and has the advantages of low cost, high detection efficiency and convenient operation.

This invention discloses a method and system for measuring the frequency response of an electro-optic modulator based on a spectral analyzer. The system includes a laser, a 95:5 single-mode fiber splitter, an optical power meter, an electro-optic modulator, a control power supply, an RF signal generator, and a spectral analyzer. The measurement method includes the following steps: calculating a calibration factor to correct optical power drift through optical path splitting, driving the modulator by applying several discrete single-frequency RF points, and measuring the carrier power P0(f) using the spectral analyzer. i ) and the first-order sideband power P1(f i ), and determined by the power ratio R(f) i )=10 (P1‑P0) / 10 Combining the Jacobi–Anger expansion / Bessel function relation, the phase modulation index β(f) is solved by inverse solution. i Then, the phase transfer function H(f) at each frequency point is calculated and fitted. i The continuous frequency response S of the modulator is obtained. 21 This invention simplifies the testing process, reduces reliance on high-speed photodetectors and vector network analyzers, and enables high-precision electro-optic response testing of electro-optic modulators at high frequencies.

The invention discloses a laser battery test system, which is used for measuring the photoelectric conversion efficiency of a laser battery under a high-power laser irradiation condition, and comprises a laser power test device and a laser battery test device, the laser power test device comprises a laser light barrier and an optical power meter, and is used for calculating the laser power; the laser battery testing device comprises a laser battery substrate, a first adapter plate, a cooling heat dissipation plate and a battery management system and is used for tracking the maximum output power of a laser battery. And the photoelectric conversion efficiency of the laser battery is the ratio of the maximum output power of the laser battery to the laser power. According to the invention, the problem of high-power laser power measurement is solved, the laminar flow path of the cooling heat dissipation plate is utilized to efficiently cool the temperature, the performance of the laser battery is prevented from being reduced, and the advantages are obvious.

The invention discloses an intelligent control system and method for a high-power laser driving power supply, and relates to the field of laser control, the method comprises the following steps: transmitting pulse detection laser, presetting the pulse width, repetition frequency and monopulse energy, calculating the loss ratio of a spectroscope through an integrated infrared temperature sensor, an optical power meter and the spectroscope, and calculating the power consumption of the spectroscope; basic parameters such as the initial temperature, the reflection power, the melting temperature and the temperature reflection correlation parameters of the reflecting material are obtained, and a database is built; emitting continuous working laser, calculating an energy density conversion coefficient and a reflection power peak value, and performing associative storage; detecting the center temperature of a material light spot in real time, predicting real-time reflection power by combining a reflection power peak value, and dynamically adjusting the actual power of working laser according to the temperature, a reflection power threshold value and an adjustment coefficient; and monitoring the temperature change rate and the reflection power, and if the temperature change rate and the reflection power exceed a safety threshold, early warning and stopping laser. According to the method, reflected laser dynamic control is achieved, laser energy output stability and machining precision are improved, and reliable system operation is guaranteed.

The present application relates to a kind of remote unattended equipment and its control method, remote control system, for solving the current energy consumption of unattended equipment in remote, electronic components are prone to aging and the problem of battery depletion caused by continuous low-power output.The present application includes the manned center station and remote unattended equipment connected, remote unattended equipment also includes remote switch control device, second optical communication module, measuring equipment, power supply and unattended equipment switch;Remote switch control device includes sequentially connected online optical power meter, current-voltage conversion circuit, comparison circuit and relay;Online optical power meter is communicated with manned center station;Online optical power meter is communicated with second optical communication module;Relay is connected with measuring equipment and unattended equipment switch respectively;Unattended equipment switch is communicated with second optical communication module;Power supply is connected with the parts in remote unattended equipment respectively.

An optical signal amplifier using a praseodymium doped fiber is described. The optical signal amplifier includes a signal laser, a first optical isolator, a second optical isolator a pump laser, a wave division multiplexer, a silica based glass optical fiber, a second optical isolator, an optical power meter, and an optical spectrum analyzer (OSA). The signal laser generates a signal laser beam. The pump laser generates a pumped laser beam. The wave division multiplexer combines the signal laser beam and the pumped laser beam and generates a combined laser beam. The silica based glass optical fiber has a preferred concentration of praseodymium ions of about 50×1024 ions / m3 and a length of about 5.7 m. The silica based glass optical fiber receives the combined laser beam, amplifies photons in the combined laser beam, and generates an amplified laser beam.

A method for testing an optical fiber, the method including transmitting, from a first light source of an optical power meter at a first time, a first light pulse in a first direction through an optical fiber; reflecting, by a fiber Bragg grating (FBG), the first light pulse in a second direction through the optical fiber, the second direction opposite the first direction; receiving, at the optical power meter, the reflected light pulse at a second time after the first time; determining, by circuitry associated with the optical power meter, a time delay between the first time and the second time; and measuring, by the circuitry, a length of the optical fiber based on the time delay.

The invention relates to the technical field of optical communication, in particular to a device and a method for testing isolation of a free space isolator. The test method comprises the following steps: determining a path for connecting each isolator single sheet according to the number of the isolator single sheets required to be segmented of the whole isolator sheet; preparing a magnet according to a magnetic dipole model or magnet magnetic field distribution simulation software, and determining a detection position of a required magnetic field intensity near the magnet; a light source and an optical power meter are arranged at the detection position, the light source corresponds to the output end of the isolator whole piece, and the optical power meter corresponds to the input end of the isolator whole piece; moving the whole magnet or isolator to enable the path to pass through the detection position in sequence; and determining the isolator single chip corresponding to the unqualified position according to the detection value of the optical power meter. By adopting the mode, the isolation degree of each area can be tested before the whole isolator is segmented, so that unqualified products after segmentation can be screened out, and the qualified rate of the free space isolator manufactured subsequently is ensured.

The present application discloses a method for evaluating the relative transmission loss of an optical fiber line, comprising: enabling an optical module to enable each optical chip to radiate laser light; reading a power value group of each transmission channel of the optical fiber line to be evaluated measured by an optical power meter as a first power value group; controlling each coupling lens of the optical module to move along a direction parallel to the arrangement of each optical chip so that each coupling lens and each optical chip are in a second relative position; wherein the second relative position is different from the first relative position; reading a power value group of each transmission channel of the optical fiber line to be evaluated measured by the optical power meter after the movement is completed as a second power value group; taking the difference between the corresponding power values ​​in the value combination set to calculate the relative transmission loss of each transmission channel of the optical fiber line to be evaluated, wherein the value combination set includes the first power value group and the second power value group. The aforementioned difference calculation process can eliminate additional connection loss, so the aforementioned evaluation method can obtain a relatively accurate relative transmission loss.

The application discloses an optical power measuring device, and relates to the technical field of optical measurement, which comprises a reflector and an optical power meter, the reflector comprises a reflecting surface, and the optical power meter comprises a photosensitive surface; the reflector is arranged in a to-be-measured area, is used for reflecting light emitted by a to-be-measured light machine to the to-be-measured area through the reflecting surface when the to-be-measured light machine generates a projection picture, and forms a reflected light path, wherein the to-be-measured area is an area to be subjected to optical power measurement in the projection picture; the optical power meter is arranged on the reflected light path, is used for receiving light conducted by the reflected light path through the photosensitive surface, and performing optical power measurement on the to-be-measured area according to the received light, so as to obtain an optical power measurement value corresponding to the to-be-measured area. The application can perform optical power measurement on a DLP projection light machine with a small projection picture size without customizing an optical power meter with a small-size photosensitive surface.

The invention discloses a self-adaptive coupling method of an optical fiber connector and an optical chip. The method comprises the following steps: driving an optical chip sending unit to emit light through an optical chip read-write module and reading internal receiving optical parameters in real time; the optical fiber splitter is connected with a receiving and transmitting port of the connector, and a transmitted optical signal is shunted to the mobile control module and an optical chip receiving end, so that optical path loopback and homologous detection are realized; the mobile control module utilizes a manipulator and a built-in optical power meter, combines an adaptive algorithm, and automatically adjusts the position of the connector according to the detected optical power and chip receiving parameters, thereby achieving the dual alignment of the transmit-receive lens and the optical chip. The system can greatly improve the coupling efficiency and yield, effectively screens bad components, and has a glue curing deformation compensation function.

This invention provides an intelligent adjustment device and method for an Er-doped solid-state laser, comprising a four-mirror cavity laser resonator consisting of a pump source, a collimating mirror, a focusing mirror, an input end mirror, an Er-doped laser crystal, an end mirror, an output coupling mirror, and a high-reflectivity mirror; and an automatic control system consisting of a PC information processing module, a visible light probe detection module, a feedback control module including a cavity mirror control rail and an angle controller, and an infrared optical power meter. The visible light probe detects the intensity change of the upconversion light from the Er-doped laser crystal in real time, which is verified by the infrared optical power meter. The PC module controls the feedback module to adjust the cavity mirror distance and angle to achieve closed-loop control. This invention utilizes optical characteristics to replace detection and intelligent closed-loop control, solving the problems of high cost and slow response of traditional 3-micron lasers, achieving low-cost, high-response automated cavity mirror control, and possessing advantages such as cost savings, fast response, and strong fault tolerance.

1. Name of the designed product: single channel optical power meter host. 2. Use of the designed product: used for connecting an optical power meter probe and displaying the measured power parameters. 3. Design points of the designed product: in the combination of shape and pattern. 4. Picture or photo best indicating the design points: perspective view.

The present application relates to the technical field of optical element detection, and specifically relates to an optical element detection system, which comprises a light source, a first single-mode optical fiber, a plurality of converging lenses arranged movably, a plurality of second single-mode optical fibers, light output by the light source sequentially passes through the first single-mode optical fiber, the converging lenses and the second single-mode optical fibers and is finally input to a light power meter; a to-be-detected optical element is placed in an optical path between the first single-mode optical fiber and the converging lenses, and the value of the light power meter can be read; for an optical element outputting a beam of light, the value can directly reflect whether the optical element is qualified; for an optical element outputting multiple beams of light, it is also necessary to judge whether the light spacing of the multiple beams of light is qualified; when the light power of the multiple beams of light is up to standard when the converging lenses are not removed, and the light power attenuation rates of the multiple beams of light are similar after the converging lenses are removed, the optical element is judged to be qualified; it can be seen that the optical element detection system of the present application can be applied to detection of optical elements outputting only one beam of light and multiple beams of light.

Provided is an optical characteristic adjustment method for an optical fiber coupler (3) that comprises an optical fiber (1) that has a polished side surface and has been placed so as to be capable of communication and an optical waveguide (2) that has a polished side surface and is optically coupled to the optical fiber (1). The method involves connecting one end of the optical waveguide (2) to a power meter (8) and connecting the other end of the optical waveguide (2) to a transmission device (5) via an optical multiplexer / demultiplexer (6), outputting communication light (22) from the transmission device (5), measuring the optical power of the communication light (22) as a first optical power by means of the power meter (8), calculating the insertion loss of the optical fiber coupler (3) on the basis of the first optical power, estimating a branching ratio from the calculated insertion loss, and aligning the optical fiber (1) and the optical waveguide (2) on the basis of the estimated branching ratio.

The application belongs to the field of optical modules, and provides an optical module test coupling system, method, control device and storage medium, wherein the system comprises an optical switch module and a control device; the optical switch module is electrically connected with the control device; in a first test process, the optical switch module is configured to be physically connected with the emission lenses of all emission channels of a first optical module, an optical power meter and a ring flux tester; the control device is configured to be electrically connected with the optical power meter and the ring flux tester; the optical switch module is controlled to transmit optical signals passing through the emission lenses of all emission channels to the optical power meter and the ring flux tester; the emission optical power of all emission channels detected by the optical power meter and the ring flux of all emission channels detected by the ring flux tester are acquired. The optical power and the ring flux of the first optical module can be tested simultaneously, and the test efficiency is high.

The invention provides an optical transient interruption instrument detection method and device based on external modulation, and the method comprises the steps: generating an optical transient interruption signal through a preset electro-optical external modulation algorithm, and then carrying out the detection of two parameters, namely optical power and optical transient interruption time, of an optical transient interruption instrument through the signal. In optical power detection, an optical transient interruption signal is divided into two paths after light splitting and coupling, one path is input into an optical transient interruption instrument to be detected to obtain an optical power indicating value, and the other path is input into a standard optical power meter to obtain an optical power standard value. The detection process of the light transient interruption time is similar, and a time indicating value and a time standard value are obtained respectively. And finally, comparing the indicating value with the standard value to finish the precision evaluation of the optical transient interruption instrument. According to the optical transient interruption instrument detection method and device based on external modulation, a complete and reliable optical transient interruption instrument detection system is constructed based on optical transient interruption signals of external modulation, test calibration of two core parameters of optical power and transient interruption time is effectively supported, and detection precision and reliability are improved.

The invention relates to a power optical fiber on-line monitoring and fault early warning system, which adopts a layered architecture design and comprises a data acquisition layer, a data processing layer, an application layer and a display layer. The data acquisition layer acquires optical fiber optical power and reflected light data; the data processing layer processes the data and identifies a prediction fault; the application layer realizes the functions of fault positioning, early warning and the like, and integrates a GIS system; and the display layer displays information through upper computer software. A controller of a specific model, an optical power meter core chip and a communication chip are selected as hardware, and an adaptive power supply circuit is designed. Multiple algorithms are applied to data processing, fault positioning is combined with OTDR and GIS technologies, and the system has the advantages of multi-channel monitoring, high-accuracy recognition and low-error positioning.

The invention provides a free space continuous variable quantum key distribution dynamic polarization control method and system. The dynamic polarization control method comprises the following steps: receiving mixed light transmitted by a free channel through telescope coupling; mixed light received by a telescope is input into a dynamic polarization controller and is adjusted by the dynamic polarization controller, and output light is subjected to light beam separation through a beam splitter; power parameters of the output light are obtained through the optical power meter, feedback signals are generated according to the power parameters, the feedback signals are input into the dynamic polarization controller, and polarization state adjustment is conducted on the output light. According to the continuous variable quantum key distribution system, light splitting feedback and monitoring based on the optical power meter are carried out on weak signal light, the influence of space link transmittance jitter can be effectively resisted, then stable polarization control is achieved, and the robustness of the continuous variable quantum key distribution system in a free space scene is improved.

The application provides a high-parallel test method of an optical comprehensive test platform, relates to the field of active optical testing, realizes parallel test of multiple measured objects or multiple test items through N independent test channels, avoids waiting time of traditional serial test, effectively improves manufacturing efficiency in combination with the high-parallel characteristics of the platform, dynamically allocates tasks based on real-time monitoring of channel resource states, avoids idle resources, cooperates with the high-integration characteristics of the platform, multiple modules share the platform, effectively shares costs, improves overall utilization of the equipment, the optical power meter, the adjustable optical attenuator and other modules integrated in each channel of the hardware architecture support hot plugging, the task analysis algorithm can flexibly map test items, adapts to different measured object requirements, conforms to the advantages of on-demand matching and easy expansion of the platform, can protect investment and adapt to dynamic changes of test scenes, a distributed data acquisition mechanism synchronously acquires channel data, and provides support for generating reliable test reports.

The utility model provides a laser engraving machine which comprises a laser engraving machine body, a first laser power meter and a second laser power meter, the laser engraving machine body is provided with a carrying table, a multi-axis moving assembly and a main control board, the multi-axis moving assembly is arranged above the carrying table, a laser generator is arranged on the carrying table, and the main control board is arranged on the carrying table. The laser generator and the multi-axis moving assembly are electrically connected with the main control board, a first laser power meter is further installed on the multi-axis moving assembly, a second laser power meter is installed on the carrying table, and the first laser power meter and the second laser power meter are in communication connection with the main control board. The laser engraving machine comprises two sets of laser power meters used for monitoring laser power in real time, one set of laser power meter is located at the output end of a laser tube, and the other set of laser power meter is located below a target to be cut. The laser engraving machine can monitor laser power in real time and adjust power output in a self-adaptive mode, and therefore the purposes of improving engraving quality, reducing machining errors and guaranteeing working safety are achieved.

A system for measuring roughness of a core sidewall of an optical waveguide based on mode excitation is provided, in which an optical waveguide to be measured is arranged between a few-mode long-period fiber grating and an optical power meter; the laser beam is incident on the optical waveguide to be measured after passing through the few-mode long-period fiber grating, and then is incident on the optical power meter after being subjected to a scattering loss caused by the roughness of the core sidewall of the optical waveguide to be measured; and the processor is configured to calculate an equivalent value of the roughness of the core sidewall according to the output power detected by the optical power meter, the output modes of the few-mode long-period fiber grating and the mode of the optical waveguide to be measured.

This invention belongs to the field of optical fiber communication, specifically relating to an air-core fiber optical amplification system and method for communication using submarine waste optical cables. The system consists of a tunable laser, a multiplexer, a variable optical attenuator, and a first wavelength division multiplexer (WDM), connected sequentially. A pump laser is connected to the signal input of an erbium-doped fiber amplifier, and the output of the erbium-doped fiber amplifier is connected to the pump end of the first WDM. The fiber collimator, after being focused, is placed at the front end of an air cell. Two optical lenses are fixed at both ends of the air cell. An air-core fiber is placed inside the air cell, positioned to ensure that the signal light can enter the fiber. Another fiber collimator is placed at the rear end of the air cell. The signal light output from the air cell is input to a single port of a second WDM. The pump end of the second WDM is connected to a photodetector, and the signal output of the second WDM is connected to the waste optical cable channel. The output of the waste optical cable channel is sequentially connected to an isolator, a demultiplexer, and an optical power meter.

This invention relates to the technical field of optical power testing, and in particular to an optical power testing method and equipment. It can automatically load and unload materials, automatically reject unqualified optical emitting modules, and classify and collect unqualified optical emitting modules, resulting in high work efficiency and applicability to production lines. The method includes a conveyor belt and an optical power meter; it also includes a test head, an electric push rod, a spring, an active locking block, a drive motor, a passive locking block, and a gripping mechanism. The test head is connected to the optical power meter via an optical fiber. The test head and the electric push rod are located on opposite sides of the conveyor belt. The active locking block is mounted on the top of the piston rod of the electric push rod via the spring. The passive locking block is mounted on the output shaft of the drive motor, and the passive locking block is arranged opposite to the active locking block. The gripping mechanism is mounted between the conveyor belt and the electric push rod via a bracket. The gripping mechanism grips the optical emitting modules on the conveyor belt and moves them between the active and passive locking blocks, aligning the test head with the emitting part of the optical emitting module.