Patents
Literature
Patsnap Eureka AI that helps you search prior art, draft patents, and assess FTO risks, powered by patent and scientific literature data.

245 results about "Optical power meter" patented technology

An optical power meter (OPM) is a device used measure the power in an optical signal. The term usually refers to a device for testing average power in fiber optic systems. Other general purpose light power measuring devices are usually called radiometers, photometers, laser power meters (can be photodiode sensors or thermopile laser sensors), light meters or lux meters.

A scanning method of a scanning optical fiber displacement sensor

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.
Owner:HARBIN ENG UNIV

Optical fiber nutation coupling system and method based on double-optical-wedge scanning

The invention provides an optical fiber nutation coupling system and method based on double-optical-wedge scanning, and relates to the technical field of free space optical communication, and the system comprises a double-optical-wedge scanning system, a nutation coupling mirror and an optical fiber which are sequentially arranged along an optical path. The double-optical-wedge scanning system is provided with two optical wedges, the vertical faces are parallel and opposite, the wedge faces are opposite, and nutation scanning is carried out through reverse and / or same-direction rotation of the two optical wedges. The nutation coupling mirror is used for focusing the target light beam into a light spot to be emitted to the optical fiber; the optical power meter, the nutation controller, the double-optical-wedge scanning system driver and the double-optical-wedge scanning system are electrically connected in sequence; the optical power meter is connected with the optical fiber transmitting end and used for measuring the optical power of the target beam coupled into the optical fiber; and the nutation controller is used for resolving the rotation angles of the two optical wedges, controlling the driver of the double-optical-wedge scanning system to apply voltage, and performing linkage control on the two optical wedges. According to the invention, the rotation of the two optical wedges is dynamically optimized, so that high and stable light output coupling efficiency is ensured, and power consumption is reduced.
Owner:TIANJIN HONGYIGUANG TECH CO LTD

Optical fiber nutation coupling method, system and device based on electro-optical crystal

The invention provides an optical fiber nutation coupling method, system and device based on an electro-optical crystal, and relates to the technical field of free space optical communication, and the device mainly comprises the electro-optical crystal, a convex lens, an optical fiber, a beam splitter, an optical power meter, a controller and a driver. The electro-optical crystal comprises a first electro-optical crystal and a second electro-optical crystal which are arranged in sequence, and is arranged on a light path between an external light source and the convex lens; the optical power meter is used for detecting the power of an optical signal, converting the power into a first electric signal and inputting the first electric signal to the controller. The characteristic that the refractive index of the electro-optical crystal directionally changes along with an electric field is utilized, the three-dimensional angle error generated when laser is incident and coupled to the center of the optical fiber end face is adjusted and compensated in real time by modulating voltage, and it is ensured that signal laser emitted by an external light source is incident to the center of the optical fiber end face accurately and vertically in real time; therefore, the efficiency, quality and stability of free space laser communication are improved; the device is simple in structure, small in size and wide in application range.
Owner:TIANJIN HONGYIGUANG TECH CO LTD

Gateway service integrated management method and system based on FTTR demand

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.
Owner:JIAXING HUASHU TV COMM CO LTD

High-parallelism test method of optical comprehensive test platform

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.
Owner:SHENZHEN LINPU CENTURY COMM TECH CO LTD

Optical module lens coupling method

The invention relates to the technical field of optical communication, and provides an optical module lens coupling method, which comprises the following steps of: S1, lightening a laser to emit laser; s2, adjusting the position of a lens, and monitoring the size of optical power by adopting an optical power meter; s3, the positions of the lens in the X-axis direction, the Y-axis direction and the Z-axis direction are adjusted, so that the optical power value reaches the maximum; s4, the lens is lifted, and UV glue is dispensed at the position, corresponding to the position where the lens is bonded, of the optical module; s5, after dispensing is completed, the lens returns to the position with the maximum optical power in the step S3, and the position of the lens in the X-axis direction is adjusted so that the optical power value can reach the target optical power value; and S6, adjusting the positions of the lens in the Y-axis direction and the Z-axis direction to enable the fluctuation amplitude of the optical power value to be within a preset range. According to the optical module lens coupling method, the final stay position of the lens is determined by observing the fluctuation amplitude of the optical power value, compared with a traditional searching mode, the lens can accurately and rapidly return to the center of the flat area of the optical power curve, and the reliability of the optical module is greatly improved.
Owner:WUHAN INPHILIGHT TECH CO LTD

Detection positioning device for semiconductor laser

The invention relates to the field of laser detecting and positioning equipment, in particular to a detecting and positioning device for a semiconductor laser, which comprises a base, the top end of the base is rotatably connected with a detecting table, and a rotary driving mechanism is arranged in the base and used for driving the detecting table to rotate; an optical power meter probe is arranged on a detection position on the outer side wall of the machine base and is used for receiving and detecting the optical power of the laser machine body; the multiple notches are formed in the top face of the detection table in an annular array mode, and two L-shaped clamping plates are symmetrically and slidably connected into the multiple notches; by arranging the L-shaped clamping plate, the first pushing adjusting mechanism, the power supply connector and the clamping conveying mechanism, automatic clamping positioning and automatic power supply plugging can be realized in the laser body detection process, the detection period is shortened, the detection efficiency is improved, and batch detection of laser bodies is facilitated.
Owner:JINCHENG OPTICAL MECHANICAL & ELECTRICAL IND COORDINATION SERVICE CENT (JINCHENG OPTICAL MECHANICAL & ELECTRICAL IND RES INST)

Multi-channel synchronous optical wavelength scanning test module and data fusion system thereof

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.
Owner:SHENZHEN LINPU CENTURY COMM TECH CO LTD

Optical alignment device and optical alignment method

Provided are an optical alignment device and an optical alignment method. The optical alignment device includes an input optical fiber, a light source provided at one terminal of the input optical fiber to generate input light, an input stage provided at another terminal of the input optical fiber, an output stage spaced apart from the input stage, a stage driving control unit configured to control driving of the input and output stages, a camera configured to receive output light generated from the input light by the waveguide chip and detect a waveguide mode, an output optical fiber having one terminal connected to the output stage, an optical power meter configured to detect an intensity of the output light, and a system controller configured to determine the waveguide mode and the intensity of the output light.
Owner:ELECTRONICS & TELECOMM RES INST

Method and system for evaluating relative transmission loss of optical fiber cable and optical module debugging method

The invention discloses a method for evaluating relative transmission loss of an optical fiber cable. The method comprises the following steps: enabling an optical module to enable each optical chip to radiate laser; reading a power value group, measured by an optical power meter, of each transmission channel of the to-be-evaluated optical fiber line as a first power value group; each coupling lens of the optical module is controlled to move along the arrangement direction parallel to each optical chip, so that each coupling lens and each optical chip are located at 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 to-be-evaluated optical fiber line measured by the optical power meter after the movement is completed, and taking the power value group as a second power value group; and calculating the relative transmission loss of each transmission channel of the to-be-evaluated optical fiber cable by taking the difference value of the corresponding power numerical values in a numerical value combination set, the numerical value combination set comprising a first power numerical value group and a second power numerical value group. The additional connection loss can be eliminated in the process of solving the difference value, so that the relatively accurate relative transmission loss can be solved by the evaluation method.
Owner:HANGZHOU KAIKAI TECHNOLOGY CO LTD +1

A quantum random number generator based on feedback adjustment of comparator threshold and a random sequence generation method

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.
Owner:Chinese People's Liberation Army Cyberspace Force Information Engineering University

Virtual simulation teaching system based on SDH equipment

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.
Owner:NEI MENG GU CHAO GAO YA GONG DIAN JU

A detection system and detection method for multiple liquids based on optical signal coupling method

The present invention relates to the technical field of liquid material detection, and discloses a detection system and detection method for multiple liquids based on an optical signal coupling method, the method comprising: through the arrangement of a primary optical fiber and a secondary optical fiber, an optical signal source and an optical power meter can detect changes in optical power, and then calculate the wavelength absorption coefficient of the liquid at different wavelengths, and derive the color characteristics of the liquid. Secondly, the viscosity of the liquid is further calculated by the attenuation of the optical power. Then, by establishing a liquid feature collection, characteristic information such as the color and viscosity of the liquid sample is extracted, and the material characteristics of the liquid are determined by matching these features with known material information. The present invention accurately detects the color and viscosity of the liquid through the coupling of optical signals and the measurement of optical power, combined with the wavelength absorption coefficient of the liquid and the optical power attenuation coefficient.
Owner:TAIYUAN INST OF TECH

A photoelectric transducer sensitivity adjustment device and method

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.
Owner:TSINGHUA SHENZHEN INTERNATIONAL GRADUATE SCHOOL

Optical fiber optical power detection method and system, electronic equipment and storage medium

The invention relates to the technical field of optical fiber operation and maintenance, in particular to an optical fiber optical power detection method and system, electronic equipment and a storage medium, and the method comprises the steps: determining one or more detection holes in an optical power meter as adjustment holes; obtaining detection errors of the adjusting hole in different detection temperature environments, wherein the detection errors are obtained by the adjusting hole based on a standard optical fiber and a corresponding standard optical power value; acquiring an actual temperature value of an environment where the optical power meter is located, and determining an initial value corresponding to the adjusting hole according to the actual temperature value and detection errors in different detection temperature environments; detecting a to-be-detected optical fiber by using the adjusting hole to obtain a detection optical power value of the to-be-detected optical fiber; correcting the detection optical power value based on the initial value to obtain an actual optical power value of the to-be-detected optical fiber; the method can reduce the detection error of the optical fiber optical power and ensure the accuracy of optical power detection.
Owner:QUALSEN (GUANGZHOU) TECH CO LTD

Method and system for measuring the frequency response of an electro-optic modulator based on a spectrum analyzer

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.
Owner:THE 34TH RES INST OF CHINA ELECTRONICS TECH CORP

Laser battery test system

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.
Owner:SHANGHAI INST OF SPACE POWER SOURCES

Intelligent control system and method of high-power laser driving power supply

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.
Owner:SHENZHEN LONGCHUANG LASER TECHNOLOGY CO LTD

Water-guided laser processing time monitoring method, device and system

The present invention discloses a method, device, and system for monitoring water-conducting laser processing time, belonging to the technical field of water-conducting laser processing. The method comprises: obtaining a time point when a laser emitter of a monitored water-conducting laser processing system is operating, and using the time point as a first starting time; obtaining a first penetration time at a point when light emitted by the laser emitter penetrates a workpiece, the first penetration time being determined by detecting laser light using an optical power meter located below the workpiece; and recording first time interval data between each first penetration time and the first starting time. This method, which only requires changes in laser light intensity detected by an optical power meter located below the workpiece, is used to determine the time interval. This method avoids the problem of being unable to obtain real-time processing status due to the influence of water mist during water-conducting laser processing, improves the criteria for determining processing completion time, and enhances processing efficiency.
Owner:SHAANXI WOTE RADIUM CESIUM MASCH MFG CO LTD

A remote unattended device, a control method thereof and a remote control system

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.
Owner:NORTHWEST INST OF NUCLEAR TECH

Auxiliary device for laser power test

The utility model discloses a laser power test auxiliary device, which comprises a base, a fixing assembly, a beam expanding assembly and a laser power meter, and is characterized in that the fixing assembly is mounted on the base and is used for mounting a laser output head; the beam expanding assembly is used for expanding the laser output by the laser output head; the laser power meter is installed on the base and used for receiving the laser expanded by the beam expanding assembly and detecting the power of the laser. According to the laser power test auxiliary device provided by the embodiment of the invention, the laser output by the laser output head is expanded through the beam expanding assembly so as to reduce the energy density of the laser, then the laser expanded by the beam expanding assembly is transmitted to the laser power meter, and the power of the laser expanded by the laser is detected by the laser so as to reduce the energy density of the laser. The risk of laser breakdown of the laser power meter can be reduced.
Owner:RAYCUS FIBER LASER TECH CO LTD

Praseodymium optical fiber

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.
Owner:KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS

Fiber optic loss and length test systems and methods with embedded fiber brags systems

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.
Owner:AFL COMM LLC

Method for Automatically Coupling a Coaxial Superluminescent Diode to a Spectral Analyzer Using a Mounting Stage

The present invention relates to the field of superluminescent diode manufacturing, and discloses a coaxial superluminescent diode automatic coupling stage equipped with a spectral analyzer, including a coaxial SLD automatic coupling stage cabinet. At the bottom end inside the coaxial SLD automatic coupling stage cabinet, there is an automatic coupling stage main unit. On both sides above the automatic coupling stage main unit, an optical power meter and a spectral analyzer are installed. In this invention, when the spectral data is unqualified, the drive current is automatically increased in a set step size, but does not exceed the maximum operating current of the set die, until both are qualified and enter the sealing and soldering process. When increasing the drive current and the output power exceeds the maximum upper limit, the coupling efficiency needs to be automatically reduced until both are qualified and enter the sealing and soldering process. After the coaxial SLD automatic coupling stage is equipped with a spectral analyzer, it realizes synchronous testing and synchronous screening of the output optical power and spectral characteristics, improves production efficiency, and executes a compensation program according to the spectral data to improve the product qualification rate.
Owner:WUHAN YINGFEIHUA TECH CO LTD

Device and method for testing isolation degree of free space isolator

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.
Owner:O NET COMM (SHENZHEN) LTD

Method, system and optical module debugging method for evaluating relative transmission loss of optical fiber lines

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.
Owner:HANGZHOU KAIKAI TECHNOLOGY CO LTD +1

LED lamp debugging method based on multi-light-color fitting spectrum

The invention discloses an LED lamp debugging method based on a multi-light-color fitting spectrum. The method comprises the steps that S1, actually-measured monochromatic spectrums and actually-measured monochromatic power corresponding to different currents of each monochromatic of a multi-primary-color LED lamp in a preset current range are collected; s2, calculating a light mixing compensation coefficient based on the actually-measured light mixing spectrum and the actually-measured light mixing power of the multi-primary-color LED lamp under the same group of current ratios and the theoretical light mixing spectrum and the theoretical light mixing power of the multi-primary-color LED lamp under the same group of current ratios; s3, the MOEA searches a current ratio, whether the current ratio reaching a set index is obtained or not is judged based on the actually-measured monochromatic spectrums and actually-measured monochromatic power corresponding to different currents in the step S1 and the light mixing compensation coefficient in the step S2, and if yes, searching is ended; otherwise, searching is repeated until the current ratio reaching the set index is obtained. According to the invention, the light color parameter of the multi-primary-color LED lamp can reach the set index by obtaining the current ratio reaching the set index.
Owner:JIANGXI YUMING SMART OPTOELECTRONICS CO LTD

Optical power measuring device

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.
Owner:GOERTEK OPTICAL TECH CO LTD

Spectral measurement device for sub-band gap photoelectric signal characterization

The utility model belongs to the field of spectral measurement devices, and discloses a spectral measurement device for sub-band gap photoelectric signal characterization, which comprises a photo-thermal deflection characterization assembly, a quantum efficiency characterization assembly, a spectral calibration assembly and a control assembly. The photo-thermal deflection characterization assembly comprises a pump light path mechanism used for generating a pump light path and a detection light path mechanism used for generating a detection light path, and the pump light path and the detection light path are vertically intersected. The quantum efficiency characterization assembly comprises a second slit, a second chopper, a second parallel lens group, a third condensing lens group, a photovoltaic cell sample table and a current amplifier which are arranged in sequence; a second light path of the monochromator passes through the second slit; and the spectrum calibration assembly comprises a fourth condensing lens group, an optical power probe and an optical power meter which are arranged in sequence, and the beam splitter prism is used for splitting the other light path of the pump light path into the focusing lens group.
Owner:INNER MONGOLIA UNIV OF TECH

Adaptive coupling method for optical fiber connector and optical chip

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.
Owner:FULONG TECH CHENGDU CO LTD