Method and system for optimizing optical fiber device fusion splicing based on online monitoring of fusion splicing parameters

Abstract

The present application relates to a method and system for optimizing the fusion splicing of optical fiber devices based on online monitoring of fusion splicing parameters. The method performs online monitoring and optimization of the fusion splicing parameters of optical fiber devices and online monitoring and optimization of the alignment of optical fiber cores, then performs fusion splicing of optical fiber devices, and then tests the performance indicators of optical fiber devices. The present method can realize the preparation of optical fiber devices with low insertion loss and low beam quality degradation. The reduction of insertion loss can effectively reduce the heat generation and temperature rise coefficient of the optical fiber device itself. Under the same circumstances, the power carrying capacity of the optical fiber device can be improved. At the same time, the effective utilization rate of energy is higher when building an optical fiber laser, which can effectively improve the conversion efficiency of the system. It is difficult to improve the beam quality through the laser system. If the additional beam quality degradation introduced by the optical fiber device is reduced, the beam quality of the system can also be improved, and the beam quality retention characteristics of the device can be improved, so as to improve the beam quality for the construction of a high-power optical fiber laser system.

Description

Technical Field

[0001] The present application relates to the technical field of optical fiber device fusion splicing, and in particular to a method and system for optimizing optical fiber device fusion splicing based on online monitoring of fusion splicing parameters. Background Art

[0002] At present, fiber lasers have been widely used in many fields including industrial processing, scientific research and national defense due to their advantages such as high conversion efficiency, good beam quality, high robustness and flexible transmission. Fiber lasers contain multiple fiber devices, such as fiber gratings, mode field adapters, signal pump combiners, and fiber end caps. With the gradual improvement of the performance indicators of semiconductor and fiber devices, the output power and beam quality of fiber lasers have also been greatly improved. However, with the continuous expansion of laser application requirements, special requirements have been put forward for the performance indicators of fiber lasers, such as high conversion efficiency and high beam quality. The construction of high-performance fiber lasers requires high-performance fiber devices as support. The technical parameters of fiber devices mainly include insertion loss and beam quality degradation. In the traditional preparation process of fiber devices, especially in fiber devices realized by fusion, such as mode field adapters, signal pump combiners and fiber end caps, the optimization of fusion parameters is particularly important. It is a prerequisite for the preparation of high-performance fiber devices. The lowest insertion loss and beam quality degradation can be obtained through parameter optimization, thereby providing core device support for the construction of high-performance fiber lasers.

[0003] In the conventional preparation process of optical fiber devices, optical fiber devices are usually aligned and fused by cladding alignment of the fusion splicer during the fusion splicing process. The devices prepared based on this method can usually meet the application requirements of conventional fiber lasers. However, for the construction of fiber lasers with high beam quality and high plug efficiency, conventional optical fiber device products are difficult to meet the high performance index requirements. Summary of the invention

[0004] Based on this, it is necessary to provide a method and system for optimizing the fusion splicing of optical fiber devices based on online monitoring of fusion splicing parameters to address the above-mentioned technical problems, so as to solve the problems of large insertion loss and serious deterioration of beam quality of existing optical fiber devices. At the same time, an intermediate testing link of optical fiber devices is introduced to screen out inferior optical fiber devices in advance.

[0005] A method for optimizing optical fiber device fusion splicing by fusion splicing parameters based on online monitoring, the method comprising:

[0006] The input part and the output part of the optical fiber device are prepared according to the process details of the optical fiber device preparation.

[0007] Place the prepared optical fiber device input and output parts on both sides of the optical fiber fusion splicer respectively, connect the optical fiber of the input part to the test light source, and split the light output by the output part through a spectroscope. One beam enters the power meter for online power testing, and the other beam enters the beam quality analyzer for online beam quality testing.

[0008] The online measurement results of beam quality and power are fed back to the fiber fusion splicer to optimize the fiber fusion splicing parameters in real time.

[0009] The online measurement results of beam quality and power are fed back to the fiber fusion splicer in real time, and the fiber core is monitored and optimized for alignment online.

[0010] After the online monitoring and optimization of the fusion splicer parameters and the online monitoring and optimization of the optical fiber core alignment are completed, the optical fiber device is fused, and then the performance indicators of the optical fiber device are tested.

[0011] In one embodiment, the step of optimizing the optical fiber splicing parameters in real time includes:

[0012] By measuring the insertion loss and beam quality degradation of optical fiber devices after fusion splicing, the system provides feedback to the optical fiber fusion splicer for parameter adjustment, and achieves the optimal optical fiber fusion splicer parameters through multiple iterations. The optical fiber fusion splicer parameters include: discharge power of the fusion splicer, discharge time and overlap length.

[0013] In one embodiment, the online measurement results of beam quality and power are fed back to the fiber fusion splicer in real time to optimize the alignment of the fiber core by online monitoring, including:

[0014] The online measurement results of beam quality and power are fed back to the fiber fusion splicer in real time.

[0015] Select the alignment method of the corresponding optical fiber device according to the specifications of the fiber core to align the optical fiber core.

[0016] In one embodiment, selecting an alignment method of a corresponding optical fiber device according to the specification of the optical fiber core to align the optical fiber core includes:

[0017] If the core of the optical fiber device is a single-mode optical fiber or the core diameter is smaller than the first preset threshold, the optical fiber core is accurately aligned online according to the online measurement result of the beam power.

[0018] If the core diameter of the optical fiber device is greater than or equal to a second preset threshold, the optical fiber core is accurately aligned online according to the online measurement result of the beam quality; wherein the first preset threshold is less than the second preset threshold.

[0019] If the core diameter of the optical fiber device is greater than or equal to the first preset threshold and less than the second preset threshold, the optical fiber core is accurately aligned online according to the online measurement results of the beam quality and power.

[0020] In one embodiment, the output pigtail of the optical fiber device is connected to an end cap and a collimator, and the output light is collimated before entering the beam splitter.

[0021] The invention discloses an optical fiber device fusion splicing system based on online monitoring and optimization of fusion splicing parameters. The optical fiber device fusion splicing system comprises: a test light source, a passive energy transmission optical fiber, an optical fiber device input part, an optical fiber device output part, an optical fiber end cap and a collimator, a spectroscope, a beam quality analyzer, an optical power meter and an optical fiber fusion splicer.

[0022] The optical fiber device input part and the optical fiber device output part are respectively placed on the clamps on both sides of the optical fiber fusion splicer.

[0023] The test light source is connected to the input part of the optical fiber device through the passive energy transmission fiber. The output part of the optical fiber device is connected to the optical fiber end cap and the collimator through the passive energy transmission fiber. The optical fiber output from the optical fiber end cap and the collimator enters the beam splitter.

[0024] The beam splitter is used to split the input light into a first beam and a second beam; the first beam enters the beam quality analyzer, and the second beam enters the optical power meter.

[0025] The beam quality analyzer is used to perform beam quality analysis on the first beam of light, obtain an online measurement result of the beam quality, and feed back the online measurement result of the beam quality to the optical fiber fusion splicer.

[0026] The optical power meter is used to measure the power of the second light beam, obtain an online measurement result of the light beam power, and feed the online measurement result of the light beam power back to the optical fiber fusion splicer.

[0027] The optical fiber fusion splicer is used to perform online monitoring and optimization of fusion parameters and online monitoring and optimization alignment of optical fiber cores according to the online measurement results of beam quality and beam power fed back by the beam quality analyzer and the optical power meter; it is also used to perform fusion splicing of optical fiber devices after the online monitoring and optimization of fusion splicer parameters and online monitoring and optimization alignment of optical fiber cores are completed, and then test the performance indicators of optical fiber devices.

[0028] In one embodiment, the specific process of the optical fiber fusion splicer performing online monitoring and optimization alignment of the optical fiber core includes:

[0029] If the core of the optical fiber device is a single-mode optical fiber or the core diameter is smaller than the first preset threshold, the optical fiber core is accurately aligned online according to the online measurement result of the beam power.

[0030] If the core diameter of the optical fiber device is greater than or equal to a second preset threshold, the optical fiber core is accurately aligned online according to the online measurement result of the beam quality; wherein the first preset threshold is less than the second preset threshold.

[0031] If the core diameter of the optical fiber device is greater than or equal to the first preset threshold and less than the second preset threshold, the optical fiber core is accurately aligned online according to the online measurement results of the beam quality and power.

[0032] In one embodiment, the power of the test light source should be in the order of milliwatts.

[0033] In one embodiment, the spectroscope uses a spectroscope with a splitting ratio greater than a preset threshold, wherein the first beam of light is a portion with a smaller energy, and the second beam of light is a portion with a larger energy.

[0034] The above-mentioned method and system for optimizing the fusion splicing of optical fiber devices based on online monitoring of fusion splicing parameters, after the method performs online monitoring and optimization of the fusion splicing parameters of optical fiber devices and online monitoring and optimization of the alignment of optical fiber cores, performs fusion splicing of optical fiber devices, and then tests the performance indicators of optical fiber devices. This method can realize the preparation of optical fiber devices with low insertion loss and low beam quality degradation. The reduction of insertion loss can effectively reduce the heat generation and temperature rise coefficient of the optical fiber device itself. Under the same circumstances, the power carrying capacity of the optical fiber device can be improved. At the same time, the effective utilization rate of energy is higher when building an optical fiber laser, which can effectively improve the conversion efficiency of the system; it is difficult to improve the beam quality through the laser system. If the additional beam quality degradation introduced by the optical fiber device is reduced, the beam quality of the system can also be improved. Based on this method, the beam quality retention characteristics of the device can be effectively improved, and the beam quality can be improved for the construction of high-power optical fiber laser systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A schematic flow chart of a method for optimizing optical fiber device fusion splicing based on online monitoring of fusion splicing parameters in one embodiment;

[0036] Figure 2 A schematic diagram of a fiber optic device fusion splicing system based on online monitoring of fusion splicing parameters in one embodiment. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0038] In one embodiment, Figure 1 As shown, a method for optimizing optical fiber device fusion splicing based on online monitoring of fusion splicing parameters is provided, the method comprising the following steps:

[0039] Step 100: Prepare the input part and the output part of the optical fiber device according to the process details of the optical fiber device preparation.

[0040] Specifically, the optical fiber device can be, but is not limited to, a mode field adapter, a signal pump combiner, and an optical fiber end cap. The input part and the output part of the optical fiber device are prepared separately according to the process details of the device preparation. For example, the mode field adapter is expanded or tapered according to the mode field diameter of the input optical fiber and the output optical fiber to achieve mode field adaptation of the input and output optical fibers.

[0041] Step 102: Place the prepared input part and output part of the optical fiber device on both sides of the optical fiber fusion splicer respectively, connect the optical fiber of the input part to the test light source, and split the light output by the output part through a spectroscope, one beam of which enters the power meter for online power testing, and the other beam of light enters the beam quality analyzer for online beam quality testing.

[0042] Specifically, the splitting ratio of the beam splitter is generally selected to be larger, such as 90 / 10 or 80 / 20. After splitting by the beam splitter, the light with larger energy enters the power meter for energy testing, and the light with smaller energy enters the beam quality analyzer for beam quality testing.

[0043] Step 104: Feedback the online measurement results of the beam quality and power to the optical fiber fusion splicer to optimize the optical fiber fusion splicing parameters in real time.

[0044] Specifically, the real-time optimization of fiber fusion splicer parameters is divided into two steps: optimization of fusion splicing parameters and optimization of precise alignment of optical fiber cores. The first step of fusion splicing parameter optimization mainly includes optimization of parameters such as discharge power, discharge time and overlap length of the fusion splicer. By measuring the insertion loss and beam quality degradation of the optical fiber device after fusion splicing, the parameters are fed back to the fiber fusion splicer for parameter adjustment. Multiple iterations are performed to achieve the optimal fiber fusion splicer parameters, such as discharge power, discharge time, overlap length and electrode offset.

[0045] The precise real-time online measurement technology can be used to obtain the optimal discharge power, discharge time, overlap length and other parameters of the fiber fusion splicer. Based on the obtained optimal fusion parameters and the high-precision online real-time measurement system, it can be ensured that the prepared optical fiber device can obtain the lowest insertion loss and beam quality degradation optical fiber device.

[0046] Step 106: Feedback the online measurement results of the beam quality and power to the fiber fusion splicer in real time, and optimize the alignment of the fiber core by online monitoring.

[0047] Specifically, the second step of real-time optimization of fiber fusion splicer parameters is to accurately monitor the core alignment optimization online. During the alignment of optical fiber devices, according to the size of the core, you can choose to use a power meter for accurate online measurement or a beam quality for accurate online measurement, or choose the best of both.

[0048] The online precise detection system and real-time parameter optimization are realized through the optimization algorithm. By compiling the optimization algorithm program, the test values ​​of the power meter and beam quality analyzer are fed back to the fiber fusion splicer in real time for parameter optimization until the optimal result is achieved.

[0049] The optimization algorithm procedure means that in the process of aligning the cores of the input and output parts, the stepping accuracy is first set, and the position of the output part of the optical fiber device is moved longitudinally along the axis according to the stepping accuracy based on the real-time power and beam quality test values. After the movement, the accuracy of the moving direction is judged based on the quality of the online measurement results of the power and beam quality. If the online measurement results improve, the movement in this direction will continue. If it deteriorates, the movement direction will be changed until the power reaches the maximum value and the beam quality reaches the minimum value. At this time, it is judged that the precise alignment of the core of the optical fiber device has been achieved.

[0050] To achieve precise alignment of the fiber cores at the front and back parts of the optical fiber device, the beam quality and output power values ​​tested online can be fed back to the fusion splicer. Through optimization iteration, precise alignment of the optical fiber device can be achieved to achieve the lowest insertion loss and beam quality degradation.

[0051] Step 108: After the online monitoring optimization of the fusion splicer parameters and the online monitoring optimization alignment of the optical fiber cores are completed, the optical fiber devices are fused, and then the performance indicators of the optical fiber devices are tested.

[0052] Specifically, the introduction of the intermediate test link of the optical fiber device can screen out inferior optical fiber devices in advance. During the preparation of the input and output parts of the optical fiber device, the optical fiber needs to be pre-processed. During the pre-processing process, some optical fibers may break, dust may invade, or bubbles may be generated. However, these inferior parts are difficult to observe with the naked eye. Introducing an online monitoring system during the fusion process, defective devices will not be able to pass light or will have extremely high loss or extremely poor beam quality. That is, when online monitoring encounters poor test results, it can be determined in advance that the optical fiber device has introduced defects during pre-processing, and it can be scrapped in time, rather than being found to be defective and unusable when the performance index test is performed after the fusion is completed. The online precise testing system can make a pre-judgment in advance when encountering inferior devices, saving the time and labor costs brought by subsequent fusion and testing.

[0053] In the above-mentioned method for optimizing the fusion splicing of optical fiber devices based on online monitoring of fusion splicing parameters, the method performs online monitoring and optimization of the fusion splicing parameters of the optical fiber devices and online monitoring and optimization of the alignment of the optical fiber cores, then performs fusion splicing of the optical fiber devices, and then tests the performance indicators of the optical fiber devices. This method can realize the preparation of optical fiber devices with low insertion loss and low beam quality degradation. The reduction of insertion loss can effectively reduce the heat generation and temperature rise coefficient of the optical fiber device itself. Under the same circumstances, the power carrying capacity of the optical fiber device can be improved. At the same time, the effective utilization rate of energy is higher when building an optical fiber laser, which can effectively improve the conversion efficiency of the system. It is difficult to improve the beam quality through the laser system. If the additional beam quality degradation introduced by the optical fiber device is reduced, the beam quality of the system can also be improved. Based on this method, the beam quality retention characteristics of the device can be effectively improved, and the beam quality can be improved for the construction of a high-power optical fiber laser system.

[0054] In one embodiment, the step of optimizing the fiber fusion splicing parameters in real time in step 104 includes: measuring the insertion loss and beam quality degradation of the fiber optic device after fusion splicing, feeding back to the fiber optic fusion splicer for parameter adjustment, and achieving the optimal fiber optic fusion splicer parameters through multiple iterations; wherein the fiber fusion splicing parameters include: splicer discharge power, discharge time and overlap length.

[0055] Specifically, the input and output parts of the optical fiber device are fused under conventional fusion parameters, the power and beam quality are tested through an online test system to obtain a set of test results, the step amount of the parameters is set, the discharge time of the fusion splicer is changed, and then the input and output parts of the optical fiber device are fused, and a set of beam quality and power values ​​are obtained by testing again, which are compared with the previous test values. If the test result improves, it means that the step change is correct and the step test can be continued. If the test result deteriorates, the step amount is changed in the opposite direction and online data testing is performed again. Based on this principle, the optimization of the fusion parameters is achieved and the optimal value is obtained.

[0056] In one embodiment, step 106 includes: feeding back the online measurement results of the beam quality and power to the optical fiber fusion splicer in real time; and selecting an alignment method of a corresponding optical fiber device according to the specifications of the optical fiber core to perform optical fiber core alignment.

[0057] In one of the embodiments, an alignment method of a corresponding optical fiber device is selected according to the specification of the core to perform optical fiber core alignment, including: if the core of the optical fiber device is a single-mode optical fiber or the core diameter is less than a first preset threshold, the optical fiber core is accurately aligned online according to the online measurement result of the beam power; if the core diameter of the optical fiber device is greater than or equal to a second preset threshold, the optical fiber core is accurately aligned online according to the online measurement result of the beam quality; wherein the first preset threshold is less than the second preset threshold; if the core diameter of the optical fiber device is greater than or equal to the first preset threshold and less than the second preset threshold, the optical fiber core is accurately aligned online according to the online measurement results of the beam quality and power.

[0058] Specifically, when selecting the precise online alignment method, if the core of the optical fiber device is a single-mode optical fiber or the core is less than 15 microns, you can choose to use the power online precise alignment method; if the core is an ultra-large core diameter optical fiber, such as greater than or equal to 40 microns, beam quality alignment is preferred. At this time, the power alignment error is large, and the core precise alignment adjustment power test change is small, making it difficult to optimize the iterative parameters of the fusion splicer; for the fusion of optical fiber devices with a core diameter of 15 microns-40 microns, both can be used at the same time, and the fused optical fiber devices can obtain the best insertion loss and beam quality degradation.

[0059] In one embodiment, the output pigtail of the optical fiber device is connected to an end cap and a collimator, and the output light is collimated before entering the beam splitter.

[0060] It should be understood that although Figure 1 The steps in the flowchart are shown in sequence as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. Moreover, Figure 1 At least part of the steps may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed in turn or alternately with other steps or at least part of the sub-steps or stages of other steps.

[0061] In one embodiment, Figure 2 As shown, a fiber optic device fusion splicing system based on online monitoring of fusion parameter optimization is provided, and the fiber optic device fusion splicing system includes: a test light source 1, a passive power transmission fiber 2, a fiber optic device input part 3, a fiber optic device output part 4, a fiber end cap and a collimator 5, a spectroscope 6, a beam quality analyzer 7, an optical power meter 8 and a fiber optic fusion splicer 11.

[0062] The optical fiber device input part 3 and the optical fiber device output part 4 are respectively placed on the clamps on both sides of the optical fiber fusion splicer.

[0063] The test light source 1 is connected to the input part 3 of the optical fiber device through the passive power transmission optical fiber 2. The output part 4 of the optical fiber device is connected to the optical fiber end cap and the collimator 5 through the passive power transmission optical fiber 2. The optical fiber output from the optical fiber end cap and the collimator enters the spectroscope.

[0064] The beam splitter 6 is used to split the input light into a first beam and a second beam; the first beam enters the beam quality analyzer 7, and the second beam enters the optical power meter 8.

[0065] The beam quality analyzer 7 is used to perform beam quality analysis on the first beam of light to obtain an online measurement result of the beam quality, and feed back the online measurement result of the beam quality to the optical fiber fusion splicer 11 via a first data line 9 between the beam quality analyzer 7 and the optical fiber fusion splicer 11.

[0066] The optical power meter 8 is used to measure the power of the second light beam to obtain an online measurement result of the light beam power, and feed back the online measurement result of the light beam power to the optical fiber fusion splicer 11 via a second data line 10 between the power meter 8 and the optical fiber fusion splicer 11 .

[0067] The optical fiber fusion splicer 11 is used to perform online monitoring and optimization of fusion parameters and online monitoring and optimization alignment of the optical fiber core according to the online measurement results of the beam quality and beam power fed back by the beam quality analyzer 7 and the optical power meter 8; it is also used to perform fusion splicing of optical fiber devices after the online monitoring and optimization of the fusion splicer parameters and the online monitoring and optimization alignment of the optical fiber core are completed, and then test the performance indicators of the optical fiber devices.

[0068] Specifically, the method of preparing optical fiber devices by using the optical fiber device fusion splicing system based on online monitoring and optimization of fusion splicing parameters proposed in this application is the same as the traditional method of preparing optical fiber devices. The specific working process includes: first, preparing the fused taper beam-forming part of the signal pump combiner, that is, the input part of the combiner, such as Figure 2 Prepare the optical fiber device input part 3 in the reverse signal pump combiner output part 4, and place them on the fixtures on both sides of the optical fiber fusion splicer 11 respectively; then connect the test light source 1 and the optical fiber device input part 3 through the passive energy transmission optical fiber 2, and connect the optical fiber device output part 4 with the optical fiber end cap and the collimator 5 through the passive energy transmission optical fiber 2, the optical fiber output through the end cap and the collimator 5 enters the spectroscope 6 for splitting, a small part of the light enters the beam quality analyzer 7 for beam quality test, and is connected to the optical fiber fusion splicer 11 through the first data line 9, the other beam of light split by the spectroscope enters the power meter 8 for power test, and is connected to the optical fiber fusion splicer through the second data line 10, and all system connections are completed.

[0069] Next, the parameters of the fiber fusion splicer 11 are optimized, and the test light source 1, fiber fusion splicer 11, beam quality analyzer 7, power meter 8 and other equipment are turned on to prepare for fusion splicing. First, the test results of the beam quality analyzer 7 and the power meter 8 are iteratively fed back to the fiber fusion splicer 11 to optimize the fusion parameters, and the parameters such as discharge power, discharge time and overlap length are optimized and fixed. For optical fiber devices of the same type and the same parameters, the same parameters can be selected for fusion splicing.

[0070] Then, in order to realize the online precise detection and alignment of the optical fiber device input part 3 and the optical fiber device output part 4, since the preparation of the optical fiber device requires pre-processing of the optical fiber, such as corrosion of the optical fiber cladding, beam taper and other treatments, the central core of the optical fiber device input part 3 is not a strictly symmetrical center, and the traditional cladding direct alignment and fusion splicing will make it difficult to accurately align the cores of the optical fiber device input part 3 and the optical fiber device output part 4, resulting in large insertion loss of the device after fusion and serious degradation of the beam quality, which is difficult to support the construction of a high-efficiency and high-beam-quality optical fiber system. The optical fiber device fusion splicing system based on online monitoring and optimization of fusion parameters proposed in this application can realize precise alignment of the core by online measuring of beam quality and power, and the measurement results are fed back to the optical fiber fusion splicer in real time, and the most precise alignment of the input part and the output part is achieved through the optimization algorithm.

[0071] Finally, after the online monitoring and optimization of the fiber optic fusion splicer parameters and the online monitoring and optimization of the fiber core alignment, the fiber optic device is fused, and then the performance indicators of the fiber optic device are tested.

[0072] Compared with the optical fiber devices prepared by the traditional method, the optical fiber devices realized by the optical fiber device fusion splicing system based on online monitoring and optimization of fusion splicing parameters proposed in this application have significantly improved technical indicators:

[0073] (1) The insertion loss of the reverse signal pump combiner based on conventional fusion splicing is generally 3-5%, and the beam quality degradation is generally greater than 20%. However, based on the fiber optic device fusion splicing method based on online monitoring and optimization of fusion parameters in this application, the insertion loss can be generally less than 2%, and the beam quality degradation can be 5-10%. This greatly reduces the insertion loss, providing a guarantee for the device to carry high power and achieve high conversion efficiency of the system. At the same time, the degradation of beam quality also provides a guarantee for building a high beam quality system.

[0074] (2) The fiber end caps prepared based on conventional methods have problems such as non-circular or missing light spots, and the beam quality of some end caps is seriously degraded. After optimizing the welding parameters through online real-time monitoring, the success rate of the fiber end caps is almost 100%.

[0075] (3) Based on high-precision online monitoring technology, the performance indicators of other optical fiber components such as mode field adapters and optical fiber fusion points can be better controlled.

[0076] Matters not covered by the present invention are known technologies.

[0077] In one of the embodiments, the specific process of the fiber fusion splicer performing online monitoring and optimization alignment on the fiber core includes: if the core of the optical fiber device is a single-mode optical fiber or the core diameter is less than a first preset threshold, the optical fiber core is accurately aligned online according to the online measurement result of the beam power; if the core diameter of the optical fiber device is greater than or equal to a second preset threshold, the optical fiber core is accurately aligned online according to the online measurement result of the beam quality; wherein the first preset threshold is less than the second preset threshold; if the core diameter of the optical fiber device is greater than or equal to the first preset threshold and less than the second preset threshold, the optical fiber core is accurately aligned online according to the online measurement results of the beam quality and power.

[0078] Preferably, the first preset threshold is 15 microns and the second preset threshold is 40 microns.

[0079] In one embodiment, the power of the test light source should be in the order of milliwatts.

[0080] Specifically, the power of the test light source should be in the milliwatt range. If the power is too high, it is easy to damage the pressure foot of the fusion splicer during the alignment of the optical fiber device, and it will also affect the alignment camera of the fusion splicer. At the same time, the test light source should be turned off during the discharge process to ensure the normal operation of the fusion splicer.

[0081] In one embodiment, the spectroscope uses a spectroscope with a splitting ratio greater than a preset threshold, wherein the first beam of light is a portion with a smaller energy, and the second beam of light is a portion with a larger energy.

[0082] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0083] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A method for optimizing optical fiber device fusion splicing based on online monitoring of fusion splicing parameters, characterized in that: The method comprises: Prepare the input part and the output part of the optical fiber device according to the process details of the optical fiber device preparation; Place the prepared optical fiber device input part and output part on both sides of the optical fiber fusion splicer respectively, connect the optical fiber of the input part to the test light source, split the light output by the output part through a beam splitter, one beam enters the power meter for online power test, and the other beam enters the beam quality analyzer for online beam quality test; Feedback the online measurement results of beam quality and power to the fiber fusion splicer to optimize the fiber fusion splicing parameters in real time; Feeding back the online measurement results of beam quality and power to the optical fiber fusion splicer in real time, and optimizing the alignment of the optical fiber core online; After the online monitoring and optimization of the fusion splicer parameters and the online monitoring and optimization of the optical fiber core alignment are completed, the optical fiber device is fused, and then the performance indicators of the optical fiber device are tested; Among them, selecting an alignment method of a corresponding optical fiber device according to the specifications of the optical fiber core to align the optical fiber core includes: If the core of the optical fiber device is a single-mode optical fiber or the core diameter is less than a first preset threshold, the optical fiber core is accurately aligned online according to the online measurement result of the beam power; If the core diameter of the optical fiber device is greater than or equal to a second preset threshold, the optical fiber core is accurately aligned online according to the online measurement result of the beam quality; wherein the first preset threshold is less than the second preset threshold; If the core diameter of the optical fiber device is greater than or equal to the first preset threshold and less than the second preset threshold, the optical fiber core is accurately aligned online according to the online measurement results of the beam quality and power.

2. The method for optimizing optical fiber device fusion splicing based on online monitoring of fusion splicing parameters according to claim 1, characterized in that: The steps for real-time optimization of fiber splicing parameters include: By measuring the insertion loss and beam quality degradation of optical fiber devices after fusion splicing, the system provides feedback to the optical fiber fusion splicer for parameter adjustment, and achieves the optimal optical fiber fusion splicer parameters through multiple iterations. The optical fiber fusion splicer parameters include: discharge power of the fusion splicer, discharge time and overlap length.

3. The method for optimizing optical fiber device fusion splicing based on online monitoring of fusion splicing parameters according to claim 1, characterized in that: Feedback the online measurement results of beam quality and power to the fiber fusion splicer in real time, and optimize the alignment of the fiber core online monitoring, including: Feeding back the online measurement results of beam quality and power to the optical fiber fusion splicer in real time; Select the alignment method of the corresponding optical fiber device according to the specifications of the fiber core to align the optical fiber core.

4. The method for optimizing optical fiber device fusion splicing based on online monitoring of fusion splicing parameters according to claim 1, characterized in that: The output pigtail of the optical fiber device must be connected to an end cap and a collimator to collimate the output light before entering the beam splitter.

5. A fiber optic device fusion splicing system based on online monitoring of fusion parameters optimization, characterized in that: The system comprises: a test light source, a passive power transmission optical fiber, an optical fiber device input part, an optical fiber device output part, an optical fiber end cap and a collimator, a beam splitter, a beam quality analyzer, an optical power meter and an optical fiber fusion splicer; The optical fiber device input part and the optical fiber device output part are respectively placed on the clamps on both sides of the optical fiber fusion splicer; The test light source is connected to the input part of the optical fiber device through the passive power transmission optical fiber, the output part of the optical fiber device is connected to the optical fiber end cap and the collimator through the passive power transmission optical fiber, and the optical fiber output from the optical fiber end cap and the collimator enters the beam splitter. The beam splitter is used to split the input light into a first beam of light and a second beam of light; the first beam of light enters the beam quality analyzer, and the second beam of light enters the optical power meter; The beam quality analyzer is used to perform beam quality analysis on the first beam of light to obtain an online measurement result of the beam quality, and feed back the online measurement result of the beam quality to the optical fiber fusion splicer; The optical power meter is used to measure the power of the second light beam, obtain an online measurement result of the light beam power, and feed back the online measurement result of the light beam power to the optical fiber fusion splicer; The optical fiber fusion splicer is used to perform online monitoring and optimization of fusion parameters and online monitoring and optimization alignment of optical fiber cores according to the online measurement results of beam quality and beam power fed back by the beam quality analyzer and the optical power meter; and is also used to perform fusion splicing of optical fiber devices after the online monitoring and optimization of fusion splicer parameters and the online monitoring and optimization alignment of optical fiber cores are completed, and then test the performance indicators of the optical fiber devices; The specific process of the optical fiber fusion splicer performing online monitoring and optimization alignment on the optical fiber core includes: If the core of the optical fiber device is a single-mode optical fiber or the core diameter is less than a first preset threshold, the optical fiber core is accurately aligned online according to the online measurement result of the beam power; If the core diameter of the optical fiber device is greater than or equal to a second preset threshold, the optical fiber core is accurately aligned online according to the online measurement result of the beam quality; wherein the first preset threshold is less than the second preset threshold; If the core diameter of the optical fiber device is greater than or equal to the first preset threshold and less than the second preset threshold, the optical fiber core is accurately aligned online according to the online measurement results of the beam quality and power.

6. The optical fiber device fusion splicing system based on online monitoring and optimization of fusion splicing parameters according to claim 5, characterized in that: The power of the test light source should be in the milliwatt range.

7. The optical fiber device fusion splicing system based on online monitoring and optimization of fusion splicing parameters according to claim 5, characterized in that: The spectroscope uses a spectroscope with a splitting ratio greater than a preset threshold, wherein the first beam of light is a portion with a smaller energy, and the second beam of light is a portion with a larger energy.

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