307 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 present disclosure provides an optical module, comprising a coherent assembly for receiving local oscillator light and a first optical signal and performing coherent demodulation on the local oscillator light and the first optical signal. A reception photodetector generates a photo-generated current from the first optical signal. A transimpedance amplifier receives the photo-generated current and amplifies the photo-generated current to output a voltage signal. An analog-to-digital conversion sampler converts the voltage signal into an AD sampling value and transmits the AD sampling value to an MCU formula. The AD sampling value is substituted into a reference optical power formula to calculate a reference optical power value, and the current frequency value is substituted into a frequency deviation formula to calculate the current frequency deviation. The current frequency deviation is subtracted from the reference optical power value to obtain an optical power calculation value as a reported optical power.

The invention relates to the technical field of optical chip testing, and particularly discloses an optical chip testing system based on an FPGA (Field Programmable Gate Array), which comprises an optical chip basic performance test analysis module, an optical chip performance rating module, an optical chip stability test analysis module, an optical chip signal processing test analysis module and a database. A high-precision laser and an optical power meter are used for calibration, a photoelectric detector is connected to the output end of an optical chip, and data are collected by an FPGA after amplification and analog-to-digital conversion, so that the input and output optical signal intensity of each test time period can be accurately obtained, and an optical gain value is accurately calculated; therefore, the amplification capability of the optical chip to the optical signal intensity in different time periods can be deeply known, the efficiency and accuracy of optical chip test analysis are effectively improved, the system fault risk caused by substandard chip performance is reduced, and valuable data support is provided for further optimization design of the optical chip.

The invention relates to the technical field of optical fiber communication, in particular to an FTTR modulation and test system which comprises an optical port modulation and test subsystem and a flow test subsystem. The optical modem test subsystem comprises a multi-channel optical modem test assembly and an extinction ratio tester; the multi-channel optical modem test assembly comprises an optical comprehensive test instrument, a one-to-two optical splitter, a clock data recovery instrument, an optical oscilloscope, a bit error tester and an upper computer. The N to-be-tested optical modems and the extinction ratio tester are electrically connected to the upper computer; the flow test subsystem comprises a network tester, OLT optical access equipment and a plurality of groups of flow test loops arranged between the network tester and the OLT optical access equipment, and each flow test loop comprises a first optical power meter, a first optical attenuator, an optical modem to be tested, a second optical power meter, a second optical attenuator and an accompanying optical modem. According to the invention, the production cost of the optical port debugging and testing process can be reduced.

The optical module provided by the invention is provided with a coherent component which is used for receiving local oscillation light and a first optical signal and carrying out coherent demodulation on the local oscillation light and the first optical signal. And the receiving photoelectric detector generates photo-generated current for the first optical signal. The trans-impedance amplifier receives the photo-generated current, amplifies the photo-generated current and outputs a voltage signal. The analog-to-digital conversion sampler converts the voltage signal into an AD sampling value and transmits the AD sampling value to an MCU formula, the AD sampling value is substituted into a reference optical power formula to calculate and obtain a reference optical power value, and the current frequency value is substituted into a frequency deviation formula to calculate and obtain the current frequency deviation. And subtracting the current frequency deviation from the reference optical power value to obtain an optical power calculation value as reported optical power.

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.

The invention discloses an automatic coupling method and device for a photoelectric detector wafer, and the method comprises the steps: employing a visual recognition technology to achieve the coarse positioning of the coupling of a to-be-detected wafer chip, taking an optical power count value collected in real time as a search signal, carrying out the real-time analysis of the signal through combining with a breadth-first search algorithm, and carrying out the detection of the signal. Path planning is carried out on a three-dimensional space to determine a search path, precise control of a motion path is carried out on the three-axis precision platform through a software control system, finally, optical power value signals under each path position are traversed to find out a maximum value signal, the maximum value signal is moved to the position, and the maximum value signal is the optimal coupling position. Therefore, automatic coupling of wafers in a limited space is realized. The wafer coupling device has the beneficial effects that the automation degree of wafer coupling can be improved, the manual operation cost and the time cost are reduced, meanwhile, the precision and the stability of wafer coupling are improved, and adverse effects caused by manual operation errors are reduced.

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.

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 embodiment of the invention provides an optical power testing system, method and equipment and a storage medium. The system comprises a light source, an attenuation piece, a rotating motor, a zero position sensor, an optical power meter and a control device. The attenuation piece comprises a plurality of fan-shaped areas, different fan-shaped areas have different transmittances, the zero-position sensor is installed on the attenuation piece, and the zero-position sensor is used as the zero pulse of the rotating motor and the initial position of rotation of the attenuation piece, so that correlation between the pulse of the rotating motor and the positions of the different fan-shaped areas of the attenuation piece is achieved. In combination with optical power acquired at different fan-shaped region positions corresponding to different pulses when the rotating motor drives the attenuation sheet to rotate, the control device constructs a corresponding relation between the pulses of the rotating motor and the optical power at the different fan-shaped region positions; the accurate determination of the transmittance of the attenuation piece can be realized by controlling the pulse of the rotating motor subsequently, and the accurate calibration of the transmittance of different positions of the attenuation piece is realized.

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 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.

The invention provides a flame ablation test platform and verification method for a towing cable under static and dynamic loads, and relates to the technical field of cables, the flame ablation test platform comprises an ablation device, a tension tester, a temperature sensing system, a light source, an optical power meter, a resistance tester and a stress-strain monitoring device, the ablation device is used for jetting flame to the towing cable; the towing cable is wound on the tension testing machine, and the tension testing machine provides required static and dynamic working loads; a probe of the temperature sensing system is in contact with the surface of the towrope and a core part, and is used for monitoring the flame temperature in real time, feeding back the flame temperature to the ablation device for dynamic adjustment and synchronously providing monitoring data; according to the invention, a stress and temperature field composite simulation technology is combined, ablation resistance test and correction under static and dynamic stretching are realized, and comprehensive analysis and monitoring verification, supporting structure optimization and application verification of the towing cable under a comprehensive state of flame ablation and static and dynamic loads are realized.

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.

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.

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.

The invention provides a polarization characteristic test method and test device for a semiconductor laser generating device. The method comprises the following steps: driving an electric rotating mirror group to rotate; recording a voltage signal output by the semiconductor light source corresponding to each rotation angle value; voltage signals output by the semiconductor laser generating devices are converted into laser power; correcting each laser power according to the rotation angle of the electric rotating mirror group; based on the corrected power of each laser, the corrected maximum laser power and the corrected minimum laser power are searched and obtained, and the polarization extinction ratio of the semiconductor laser generating device is calculated and obtained according to the corrected maximum laser power and the corrected minimum laser power; and in the polar axis coordinate system, drawing a polarization characteristic spectrum of the semiconductor light source according to the rotation angle of the electric rotating mirror group and the corrected laser power corresponding to the rotation angle. The semiconductor light source polarization characteristic testing efficiency is greatly improved, the constant error of the testing system can be eliminated by correcting the power of the laser, and the testing precision is improved.

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.

The invention discloses an automatic test system for a QSFP28 interface optical module, which comprises a computer, a QSFP28 test board, a standard optical module, an optical module to be tested, an optical attenuator, an optical power meter, a bit error tester, an oscilloscope and an optical splitter, the standard optical module provides an optical signal and transmits the optical signal to a receiving end of the to-be-tested optical module, and the to-be-tested optical module receives the instruction and the data transmitted by the QSFP28 test board and correspondingly modifies a register of the to-be-tested optical module according to the corresponding instruction and the data. According to the automatic test system and test method for the QSFP28 interface optical module, operation of a measuring instrument and writing of register parameters of the optical module are controlled through the system, automatic test of the optical module to be tested is achieved, the workload of workers is greatly reduced, the consistency of the performance of the optical module is ensured, and the production efficiency is improved.

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.

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.

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.

The utility model discloses a special detection cable for an optical fiber detection device, which relates to the technical field of optical fiber detection, and is characterized by comprising a transmission cable, and a first joint and a second joint which are arranged at two ends of the transmission cable and are respectively used for being connected with the optical fiber detection device and an optical power meter, the transmission cable is sleeved with a protection tube arranged on the first connector. The detection cable is specially used for detecting the optical fiber detection device, and is connected with the device before the detection of the optical fiber detection device, so that whether the signal strength output by the optical fiber detection device meets the stable value of the detection requirement or not can be judged by matching with the optical power meter; therefore, the problem of detection misjudgment caused by insufficient output signal strength of the detection device is avoided.

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.

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 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.

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.