Test control method and device for cladding light stripper

Abstract

The invention discloses a test control method and device for a cladding light stripper, and relates to the technical field of fiber lasers, and the test control method for the cladding light stripper comprises the following steps: controlling a light source module to generate a cladding light beam, enabling the cladding light beam to sequentially pass through an object to be tested and a light splitting module to form a first light beam and a second light beam, acquiring light spot imaging information of the second light beam, calculating an energy ratio of light spot energy of the fiber core light to light spot energy of the second light beam according to the light spot imaging information of the second light beam, acquiring power of the cladding light beam and power of the first light beam, and calculating cladding light filtering efficiency of the to-be-measured object by combining the energy ratio according to the power of the cladding light beam and the power of the first light beam; the technical scheme provided by the invention aims to improve the test precision of the cladding light stripper.

Description

Technical Field

[0001] This invention relates to the field of fiber laser technology, and in particular to a test control method and apparatus for a cladding optical stripper. Background Technology

[0002] In laser design, such as double-clad fiber lasers, a significant amount of light accumulates in the cladding region of the fiber due to unavoidable factors. If this light is directly output with the laser without processing, it will not only degrade the quality of the output beam but may also cause the fiber to overheat or even damage the fiber assemblies. Therefore, the cladding light stripper (CLS) plays a crucial role in fiber lasers. It optimizes beam quality and ensures stable laser operation by removing light from the cladding. Its working mechanism involves breaking the total internal reflection condition of light in the fiber cladding, thus separating the light from the cladding. Therefore, reliably evaluating the amount of cladding light removed from the system is essential.

[0003] Because the portion of the cladding light with a lower numerical aperture can couple into the core region of the cladding light stripper, conventional testing methods often misinterpret this portion of light as core light, leading to a decrease in testing accuracy. Summary of the Invention

[0004] The main objective of this invention is to propose a testing and control method and apparatus for cladding optical strippers, aiming to improve the testing accuracy of cladding optical strippers.

[0005] To achieve the above objectives, the present invention proposes a testing and control method for a cladding optical stripper, comprising the following steps:

[0006] The control light source module generates a cladding beam, which passes through the object under test and the beam splitter in sequence to form a first beam and a second beam. Acquire and calculate the energy ratio between the core beam spot energy and the second beam spot energy based on the spot imaging information of the second beam; The cladding light filtering efficiency of the test object is calculated by acquiring and calculating the power of the cladding beam and the power of the first beam, and combining the energy ratio.

[0007] In one embodiment, acquiring and calculating the energy ratio of the fiber core spot energy to the second beam spot energy based on the spot imaging information of the second beam includes the following steps: The homogenization is calculated based on the spot imaging information, and the relationship curve between homogenization and the radial size of the spot is determined. The fiber core beam spot radius is calculated based on the relationship curve between homogenization and beam radial size; the second beam spot radius is calculated based on the relationship curve between homogenization and beam radial size. The energy ratio of the fiber core spot energy to the second beam spot energy is calculated based on the fiber core spot radius and the second beam spot radius.

[0008] In one embodiment, calculating the fiber core beam spot radius based on the relationship curve between the homogenization degree and the beam spot radial dimension, and calculating the second beam spot radius based on the relationship curve between the homogenization degree and the beam spot radial dimension, includes the following steps: Based on the curve relating homogenization to the radial dimension of the light spot, two segments of the first homogenization line are obtained; The fiber core spot radius is calculated based on the minimum spot radial dimension between the two segments of the first homogenization line. The radius of the second beam spot is calculated based on the maximum radial dimension of the spot between the two segments of the first homogenization line.

[0009] In one embodiment, calculating the homogenization degree based on the spot imaging information and determining the relationship curve between the homogenization degree and the radial size of the spot includes the following steps: The homogenization is calculated based on the spot imaging information, and the relationship curves between the homogenization and the radial size of the spot are determined along the first direction and the second direction, respectively. The fiber core spot radius is calculated based on the relationship curve between homogenization and spot radial size, including the following steps: The first radius and the second radius of the fiber core light spot are obtained based on the two curves relating homogenization to the radial dimension of the light spot. The larger of the first radius and the second radius is taken as the radius of the fiber core light spot.

[0010] In one embodiment, the first direction and the second direction are perpendicular to each other.

[0011] In one embodiment, the light spot imaging information includes the intensity of the light spot; The step of calculating the energy ratio of the fiber core spot energy to the second beam spot energy based on the fiber core spot radius and the second beam spot radius includes the following steps: The energy ratio of the core light spot energy to the second beam spot energy is calculated based on the intensity of the light spot, combined with the core light spot radius and the second beam spot radius.

[0012] In one embodiment, calculating the homogenization based on the spot imaging information includes the following steps: Obtain the highest and lowest light intensity per unit pixel area of ​​the second beam spot; The homogenization degree is calculated based on the ratio of the difference between the highest light intensity and the lowest light intensity to the highest light intensity.

[0013] In one embodiment, the step of acquiring and calculating the cladding light filtering efficiency of the test object based on the power of the cladding beam and the power of the first beam, and in conjunction with the energy ratio, includes the following steps: The residual cladding optical power passing through the test object is obtained and calculated based on the splitting ratio of the beam splitting module and the power of the first beam. The power of the cladding beam is obtained, and the cladding light filtering efficiency of the test object is calculated based on the power of the cladding beam, the residual cladding light power, and the energy ratio.

[0014] In one embodiment, the power of the cladding beam generated by the light source module is set to P0, and the power of the first beam is set to P1, then P1≥0.99P0.

[0015] A testing apparatus for a cladding optical stripper includes: The light source module is used to generate the cladding beam; The beam splitter is used to split the residual cladding beam passing through the object under test into a first beam and a second beam. A power testing module is used to test the power of the first beam; An imaging module is used to acquire the spot imaging information of the second beam; and, The controller is used to electrically connect the light source module, the power test module, and the imaging module; The controller includes a memory, a processor, and a test control program for the cladding optical stripper stored in the memory and executable on the processor. When executed by the processor, the test control program for the cladding optical stripper implements the steps of a test control method for the cladding optical stripper. The test control method for the cladding optical stripper includes the following steps: The control light source module generates a cladding beam, which passes through the object under test and the beam splitter in sequence to form a first beam and a second beam. Acquire and calculate the energy ratio between the core beam spot energy and the second beam spot energy based on the spot imaging information of the second beam; The cladding light filtering efficiency of the test object is calculated by acquiring and calculating the power of the cladding beam and the power of the first beam, and combining the energy ratio.

[0016] The technical solution of this invention uses a beam splitter to separate the cladding beam, forming a second beam for calculating the energy ratio and a first beam for acquiring power information, thereby achieving precise measurement of the cladding light filtering efficiency. Specifically, by acquiring the spot imaging information of the second beam, the core light spot portion within the entire second beam spot can be accurately identified, allowing the calculation of the energy ratio between the core light spot energy and the second beam spot energy. This ratio reflects the proportion of core light in the second beam. By combining this energy ratio with the initial power of the cladding beam and the power of the first beam after passing through the test object and the beam splitter, the filtering efficiency of the cladding light stripper under test can be accurately calculated through energy relationship calculations. This method not only has a clear operation process but also fully utilizes optical separation and imaging analysis technology, effectively improving the accuracy and reliability of the test results and providing a scientific and effective technical means for the performance evaluation of cladding light strippers. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 A flowchart illustrating an embodiment of the test control method for the cladding optical stripper provided by the present invention; Figure 2 A graph showing the relationship between homogenization and radial size of the light spot in an embodiment of the test control method for the cladding optical stripper provided by the present invention. Figure 3 A schematic diagram of the cladding optical path of an embodiment of the test control method for the cladding optical stripper provided by the present invention; Figure 4 A schematic diagram of a test control device for a cladding optical stripper provided by the present invention; Figure 5 This is a schematic diagram of the controller in an embodiment of the test control device for the cladding optical stripper provided by the present invention.

[0019] Explanation of icon numbers: 1. Fiber core; 2. Fiber cladding; 3. First homogenization segment; 4. Second homogenization segment; 5. Light source module; 6. Beam splitting module; 7. Power testing module; 8. CCD imaging module; 9. Test object; 10. Cladding light; 101. Cladding light coupled into the fiber core; 1001. Processor; 1002. Communication bus; 1003. User interface; 1004. Network interface; 1005. Memory.

[0020] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0022] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0023] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0024] In laser design, such as double-clad fiber lasers, a significant amount of light accumulates in the cladding region of the fiber due to unavoidable factors. If this light is directly output with the laser without processing, it will not only degrade the quality of the output beam but may also cause the fiber to overheat or even damage the fiber assemblies. Therefore, the cladding light stripper (CLS) plays a crucial role in fiber lasers. It optimizes beam quality and ensures stable laser operation by removing light from the cladding. Its working mechanism involves breaking the total internal reflection condition of light in the fiber cladding, thus separating the light from the cladding. Therefore, reliably evaluating the amount of cladding light removed from the system is essential.

[0025] Because the portion of the cladding light with a lower numerical aperture can couple into the core region of the cladding light stripper, conventional testing methods often misinterpret this portion of light as core light, leading to a decrease in testing accuracy.

[0026] Based on the above problems, this invention proposes a test control method for a cladding optical stripper.

[0027] Please see Figures 1 to 5 In one embodiment of the present invention, the test control method for the cladding light stripper includes the following steps: S100: Control the light source module 5 to generate 10 beams of cladding light, so that the 10 beams of cladding light pass through the object under test 9 and the beam splitting module 6 in sequence to form the first beam and the second beam. S200: Acquire and calculate the energy ratio between the core beam spot energy and the second beam spot energy based on the spot imaging information of the second beam; S300: Obtain and calculate the cladding light 10 filtering efficiency of the test object 9 based on the power of the cladding light 10 beam and the power of the first beam, and in combination with the energy ratio.

[0028] The technical solution of this invention uses a beam splitter module 6 to separate the cladding light 10 beam into a second beam for calculating the energy ratio and a first beam for acquiring power information, thereby achieving precise measurement of the cladding light 10 filtering efficiency. Specifically, by acquiring the spot imaging information of the second beam, the core light spot portion within the entire second beam spot can be accurately identified, thus calculating the energy ratio of the core light spot energy to the second beam spot energy. This ratio reflects the proportion of the core light in the second beam. By combining the energy ratio with the initial power of the cladding light 10 beam and the power of the first beam after passing through the test object 9 and the beam splitter module 6, the filtering efficiency of the cladding light 10 stripper for the cladding light 10 can be accurately calculated through energy relationship calculation. This method not only has a clear operation process but also fully utilizes optical separation and imaging analysis technology, effectively improving the accuracy and reliability of the test results, and providing a scientific and effective technical means for the performance evaluation of the cladding light 10 stripper.

[0029] In specific implementation, the light source module 5 may include a laser, and the object under test 9 includes a cladding light 10 stripper. In other embodiments, the light stripper may be a light-transmitting material structure, such as glass or plastic. The optical splitter module includes a dichroic lens, and in other embodiments, it may include at least one of a beam splitter, a beam splitter prism, and a waveplate. When the optical splitter module includes a dichroic lens, the cladding light 10 beam passes through the object under test 9 and is incident perpendicularly on the dichroic lens. The light spot imaging information includes, but is not limited to, the light intensity and size information of the light spot. The power of the cladding light 10 beam can be determined by the rated power of the light source module 5 or obtained through testing, and the power of the first beam can be obtained through testing.

[0030] refer to Figure 3 An optical fiber consists of an optical cladding 2 and a fiber core 1. When the optical path propagates in the optical fiber, it usually does not work. However, when the cladding light 10 propagates in the optical cladding 2, part of the cladding light 10 will couple into the fiber core 1, that is, the cladding light 101 coupled into the fiber core and propagates in the fiber core 1.

[0031] In one embodiment, the step of acquiring and calculating the energy ratio of the fiber core spot energy to the second beam spot energy based on the spot imaging information of the second beam includes the following steps: S210: Calculate the homogenization degree based on the light spot imaging information, and determine the relationship curve between the homogenization degree and the radial size of the light spot; S220: Calculate the fiber core beam spot radius based on the relationship curve between homogenization and beam radial size, and calculate the second beam spot radius based on the relationship curve between homogenization and beam radial size; S230: Calculate the energy ratio of the fiber core spot energy to the second beam spot energy based on the fiber core spot radius and the second beam spot radius.

[0032] First, homogenization parameters are extracted from the beam spot imaging information. Homogenization reflects the uniformity of the beam spot energy distribution. By establishing a curve showing the relationship between homogenization and the radial dimension of the beam spot, the energy variation characteristics of the beam spot at different radial positions can be observed intuitively. Based on this curve, the beam spot radii of the core beam and the second beam are determined, thereby enabling the determination of the beam spot energy of the core beam and the second beam, and the calculation of their energy ratio, achieving a precise analysis of the beam spot energy composition.

[0033] refer to Figure 2 In one embodiment, calculating the fiber core beam spot radius based on the relationship curve between the homogenization degree and the beam spot radial size, and calculating the second beam spot radius based on the relationship curve between the homogenization degree and the beam spot radial size, includes the following steps: S221: Based on the relationship curve between homogenization and the radial size of the light spot, two segments of the first homogenization line 3 are obtained; S222: Calculate the fiber core light spot radius based on the minimum spot radial dimension between the two segments of the first homogenization line 3; S223: Calculate the radius of the second beam spot based on the maximum radial dimension of the spot between the two segments of the first homogenization line 3.

[0034] Here, by analyzing the relationship curve between homogenization and the radial size of the light spot, two segments 3 of the first homogenization line with specific characteristics are identified. The positions and ranges of these two segments directly correspond to different regions of the light spot energy distribution. Among them, the minimum radial size between the two segments corresponds to the core light region where the energy is highly concentrated, and this is used as the core light spot radius; while the maximum radial size covers the entire spot range of the second beam, thus determining the spot radius of the second beam and laying the foundation for calculating the energy ratio.

[0035] In the specific implementation process, based on the relationship curve between the homogenization degree and the radial size of the light spot, the second homogenization degree segment 4 and two first homogenization degree segments 3 can be obtained. The first homogenization degree segments 3 and the second homogenization degree segments 4 have the same homogenization degree. According to the actual situation, the specific homogenization degree can be allowed to have a certain deviation. The homogenization degree corresponding to the second homogenization degree segment 4 is less than the homogenization degree corresponding to the first homogenization degree segment 3.

[0036] In one embodiment, calculating the homogenization degree based on the spot imaging information and determining the relationship curve between the homogenization degree and the radial size of the spot includes the following steps: S213: Calculate the homogenization based on the spot imaging information, and determine the relationship curve between the homogenization and the radial size of the spot along the first direction and the second direction respectively; The fiber core spot radius is calculated based on the relationship curve between homogenization and spot radial size, including the following steps: S224: Based on the two curves relating homogenization to the radial dimension of the light spot, the first radius and the second radius of the fiber core light spot are obtained, and the larger of the first radius and the second radius is taken as the radius of the fiber core light spot.

[0037] Considering the differences in energy distribution of the fiber core light spot in different directions, this embodiment employs a multi-directional analysis method. By obtaining the homogenization versus radial dimension curves in the first and second directions respectively, the morphological characteristics of the light spot can be captured more comprehensively. After obtaining the fiber core light spot radii in both directions, the larger value is selected as the final fiber core light spot radius. This processing method effectively avoids calculation errors caused by the non-circular symmetry characteristics due to path differences of the fiber core light spot in different directions, ensuring the accuracy of fiber core light energy calculation.

[0038] In practice, the radius of the second beam spot is usually circular, with the same radius in both the first and second directions. If there is a difference in the radius of the second beam spot in the two directions, the larger value or the average value can be selected to determine the radius of the second beam spot. In specific operations, the relationship curve between homogenization and the radial size of the spot can be determined along one, three, or five directions to calculate the radius of the second beam spot. The number of relationship curves between homogenization and the radial size of the spot is not limited.

[0039] In one embodiment, the first direction and the second direction are perpendicular to each other.

[0040] Setting the first and second directions to be perpendicular to each other, for example, corresponding to the horizontal and vertical directions of the light spot respectively, allows for analysis of the light spot from two orthogonal dimensions. This orthogonal setting can maximize the coverage of the spatial distribution characteristics of the light spot, ensuring that the light spot radius information obtained in different directions is representative, thereby more accurately reflecting the actual size of the fiber core light spot and providing a reliable basis for subsequent energy calculations.

[0041] In practice, the angle between the first direction and the second direction can be 30°, 50° or 75°.

[0042] In one embodiment, the light spot imaging information includes the intensity of the light spot; The step of calculating the energy ratio of the fiber core spot energy to the second beam spot energy based on the fiber core spot radius and the second beam spot radius includes the following steps: S231: Obtain and calculate the energy ratio of the core light spot energy to the second beam spot energy based on the intensity of the light spot, combined with the core light spot radius and the second beam spot radius.

[0043] The intensity of the light spot is a core parameter for energy calculation. This embodiment explicitly states that intensity data is included in the light spot imaging information. When calculating the energy ratio, by combining the determined core beam spot radius and the second beam spot radius, the total energy of the core beam spot and the total energy of the second beam spot can be obtained by integrating the light spot intensities within different radius ranges. Calculating the ratio between these two energy values ​​accurately yields the energy ratio between them. This ratio is a key intermediate parameter for subsequently calculating the cladding light filtering efficiency.

[0044] In one embodiment, calculating the homogenization based on the spot imaging information includes the following steps: S211: Obtain the highest and lowest light intensity per unit pixel area of ​​the second beam spot; S212: Calculate the homogenization degree based on the ratio of the difference between the highest light intensity and the lowest light intensity to the highest light intensity.

[0045] The homogenization is calculated based on the distribution characteristics of the light spot intensity. By extracting the highest and lowest light intensities per unit pixel area of ​​the second beam spot, the fluctuation of the spot's energy distribution can be reflected. The specific calculation formula is (highest light intensity - lowest light intensity) / highest light intensity. This ratio reflects the uniformity of the spot's energy distribution, thus distinguishing the cladding light 10 from the cladding light 101 coupled into the fiber core. The introduction of homogenization provides a quantitative basis for subsequently determining the spot radius through the relationship curve, helping to accurately delineate the regions of the fiber core light and the cladding light 10. The unit pixel area can be one pixel, 10 pixels, or 100 pixels; the specific number of pixels is not limited. It should be noted that in this embodiment, the fiber core light is the cladding light 101 coupled into the fiber core.

[0046] In one embodiment, the power of the cladding light 10 beam generated by the light source module 5 is set to P0, and the power of the first beam is set to P1, then P1≥0.99P0.

[0047] This setting ensures that when the beam splitter 6 splits the beam, the first beam can carry the majority of the optical power, thereby reducing the impact of energy loss caused by the splitting process on the test results. The condition P1≥0.99P0 allows the power of the first beam to approximately represent the total power of the residual cladding light 10 after passing through the test object 9, providing a simplified and reliable basis for subsequent calculation of the residual cladding light 10 power, which helps to improve the accuracy and efficiency of the test.

[0048] In a specific embodiment, the test control method for the cladding light stripper includes the following steps: Step 1: Set up the test device for the cladding light 10 stripper. The test device for the cladding light 10 stripper includes: light source module 5, beam splitting module 6, power testing module 7, CCD imaging module 8 and controller, and set the test object 9, i.e., the cladding light 10 stripper. Step 2: The light source module 5 generates a beam of cladding light 10 with power P0, which enters the cladding light 10 stripper. The cladding light 10 stripper filters out the power of the injected cladding light 10, and the power of the residual cladding light 10 is P1.

[0049] Step 3: The residual cladding light 10 with power P1 passes through a beam splitting module 6 with a splitting ratio of 99:1. The first beam with 99% power enters the power testing module 7. The power P2 displayed by the power testing module 7 is approximately the power P1 of the residual cladding light 10.

[0050] Step 4: The second beam with 1% power enters the CCD imaging module 8 to perform spot imaging.

[0051] Step 5: Output the imaging result of the light spot on the CCD. The light spot uniformity is calculated using the following formula: .

[0052] Where U is the homogenization degree, Imax is the highest light intensity per unit pixel, and Imin is the lowest light intensity per unit pixel.

[0053] Step Six: Output the curve showing the relationship between homogenization and the radial size of the light spot, such as... Figure 2 As shown. Because the cladding light 10 coupled into the fiber core 1 has a lower homogeneity in the fiber core 1, while the cladding light 10 that continues to propagate in the cladding has a higher homogeneity. Figure 2 In this context, r is the radius of the fiber core beam spot, and R is the radius of the second beam spot.

[0054] Step 7: The two-dimensional CCD image can generate two curves showing the relationship between homogenization and the radial size of the spot along the first mutually perpendicular direction, i.e., the x-axis, and the second direction, i.e., the y-axis. Then there will be two data points, rx and ry. Take the larger value between rx and ry as the required data r.

[0055] Step 8: Calculate the energy ratio T between the core beam spot energy and the second beam spot energy using the following formula: .

[0056] Where I is the light spot intensity, r is the light spot radius in dr, and φ is the light spot angle in dφ.

[0057] Step Nine: Based on the calculation results in Step Eight, it can be seen that the power of the cladding light 10 coupled into the fiber core 1 from the residual cladding light 10 emitted from the test object 9 is p1. T. The cladding light filtering efficiency A of the device under test is then calculated using the following formula: .

[0058] In another embodiment, the step of acquiring and calculating the cladding light 10 filtering efficiency of the test object 9 based on the power of the cladding light 10 beam and the power of the first beam, combined with the energy ratio, includes the following steps: S310: Obtain and calculate the power of the residual cladding light 10 passing through the test object 9 based on the splitting ratio of the beam splitting module 6 and the power of the first beam; S320: Obtain the power of the cladding light 10 beam, and calculate the cladding light 10 filtering efficiency of the test object 9 based on the power of the cladding light 10 beam, the power of the residual cladding light 10, and the energy ratio.

[0059] This step is the core process for calculating the cladding light 10 filtering efficiency. First, using the known splitting ratio of the beam splitter 6 and the measured power of the first beam, the power of the residual cladding light 10 after passing through the test object 9 can be accurately calculated. Then, combining the power of the initial cladding light 10 beam with the previously obtained energy ratio, the cladding light 10 filtering efficiency can be calculated using a formula. This process comprehensively considers the characteristics of optical power transfer and energy distribution, enabling accurate evaluation of the stripping effect of the test object 9 on the cladding light 10.

[0060] The cladding light filtering efficiency A is calculated using the following formula: .

[0061] Where P1 is the residual cladding light power, and P1 = B P2 and B are coefficients, specifically equal to the ratio of the residual cladding light 10 power to the first beam power after passing through beam splitter 6. Coefficient B is an inherent property of beam splitter 6 and is a constant. For example, if the beam splitting ratio of beam splitter 6 is 1:99, then B = (1+99) / 99.

[0062] The order in which steps S100 to S320 are executed is not specifically limited. The order of each step can be adjusted according to actual needs, so as to solve the actual problem.

[0063] The present invention also proposes a testing device for a cladding photo-stripper.

[0064] refer to Figure 4 In one embodiment, the testing device for the cladding light stripper includes: a light source module 5, a beam splitting module 6, a power testing module 7, an imaging module, and a controller.

[0065] The light source module 5 is used to generate 10 beams of cladding light; the beam splitting module 6 is used to split the 10 beams of residual cladding light passing through the test object 9 into a first beam and a second beam; the power testing module 7 is used to test the power of the first beam; the imaging module is used to acquire the spot imaging information of the second beam; and the controller is used to electrically connect the light source module 5, the power testing module 7 and the imaging module.

[0066] The controller includes a memory 1005, a processor 1001, and a test control program for the cladding light 10 stripper stored in the memory 1005 and executable on the processor 1001. When the test control program for the cladding light 10 stripper is executed by the processor 1001, it implements the steps of the test control method for the cladding light 10 stripper.

[0067] Since the testing device for the cladding light stripper adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here.

[0068] In one embodiment, the light source module 5 generates cladding light 10, and the device under test 9 is a cladding light 10 stripper, positioned between the light source module 5 and the beam splitter module 6. The beam splitter module 6 splits the remaining beam after passing through the device under test into two beams. The first beam is tested for power by the power testing module 7, and the second beam is imaged by the CCD imaging module 8. The imaging module includes devices capable of testing the spot diameter and spot intensity, such as the CCD imaging module 8 or a CMOS imaging module. The power testing module 7 includes a spot analyzer or an optical power meter.

[0069] like Figure 5 As shown, the controller may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is used to enable communication between these components. The user interface 1003 may include a display screen or an input unit such as a keyboard; optionally, the user interface 1003 may also include a standard wired interface or a wireless interface. The network interface 1004 may optionally include a standard wired interface or a wireless interface (such as a Wi-Fi interface). The memory 1005 may be a high-speed random access memory (RAM) or a stable non-volatile memory (NVM), such as a disk storage device. The memory 1005 may also optionally be a storage device independent of the aforementioned processor 1001.

[0070] Those skilled in the art will understand that Figure 5 The structure shown does not constitute a limitation on the controller and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0071] The memory 1005, which serves as a storage medium, may include an operating system, a data storage module, a network communication module, a user interface 1003 module, and a test control program for the cladding light 10 stripper.

[0072] In the controller, the network interface 1004 is mainly used for data communication with the network server; the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and the memory 1005 in this controller can be set in the controller, and the controller uses the processor 1001 to call the test control program of the cladding light 10 stripper stored in the memory 1005 to regulate the device.

[0073] Compared with existing testing methods, the present invention has the following advantages: (1) A test method is provided that can effectively distinguish the cladding light 10 coupled into the fiber core 1, thereby improving the reliability of the cladding light 10 test system.

[0074] (2) It is applicable to the testing of large-core and small-core optical fibers, as well as low-power and high-power testing, and has universality.

[0075] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A test control method for a cladding optical stripper, characterized in that, Includes the following steps: The control light source module generates a cladding beam, which passes through the object under test and the beam splitter in sequence to form a first beam and a second beam. Acquire and calculate the energy ratio between the core beam spot energy and the second beam spot energy based on the spot imaging information of the second beam; The cladding light filtering efficiency of the test object is calculated by acquiring and calculating the power of the cladding beam and the power of the first beam, combined with the energy ratio.

2. The test control method for the cladding optical stripper as described in claim 1, characterized in that, The step of acquiring and calculating the energy ratio of the fiber core spot energy to the second beam spot energy based on the spot imaging information of the second beam includes the following steps: The homogenization is calculated based on the spot imaging information, and the relationship curve between homogenization and the radial size of the spot is determined. The fiber core beam spot radius is calculated based on the relationship curve between homogenization and beam radial size; the second beam spot radius is calculated based on the relationship curve between homogenization and beam radial size. The energy ratio of the fiber core spot energy to the second beam spot energy is calculated based on the fiber core spot radius and the second beam spot radius.

3. The testing and control method for the cladding optical stripper as described in claim 2, characterized in that, The step of calculating the fiber core beam spot radius based on the relationship curve between homogenization and beam radial size, and calculating the second beam spot radius based on the relationship curve between homogenization and beam radial size, includes the following steps: Based on the curve relating homogenization to the radial dimension of the light spot, two segments of the first homogenization line are obtained; The fiber core spot radius is calculated based on the minimum spot radial dimension between the two segments of the first homogenization line. The radius of the second beam spot is calculated based on the maximum radial dimension of the spot between the two segments of the first homogenization line.

4. The testing and control method for the cladding optical stripper as described in claim 2, characterized in that, The step of calculating the homogenization degree based on the spot imaging information and determining the relationship curve between the homogenization degree and the radial size of the spot includes the following steps: The homogenization is calculated based on the spot imaging information, and the relationship curves between the homogenization and the radial size of the spot are determined along the first direction and the second direction, respectively. The fiber core spot radius is calculated based on the relationship curve between homogenization and spot radial size, including the following steps: The first radius and the second radius of the fiber core light spot are obtained based on the two curves relating homogenization to the radial dimension of the light spot. The larger of the first radius and the second radius is taken as the radius of the fiber core light spot.

5. The test control method for the cladding optical stripper as described in claim 4, characterized in that, The first direction and the second direction are perpendicular to each other.

6. The test control method for the cladding optical stripper as described in claim 2, characterized in that, The light spot imaging information includes the intensity of the light spot; The step of calculating the energy ratio of the fiber core spot energy to the second beam spot energy based on the fiber core spot radius and the second beam spot radius includes the following steps: The energy ratio of the core light spot energy to the second beam spot energy is calculated based on the intensity of the light spot, combined with the core light spot radius and the second beam spot radius.

7. The test control method for the cladding optical stripper as described in claim 2, characterized in that, The homogenization is calculated based on the light spot imaging information, including the following steps: Obtain the highest and lowest light intensity per unit pixel area of ​​the second beam spot; The homogenization degree is calculated based on the ratio of the difference between the highest light intensity and the lowest light intensity to the highest light intensity.

8. The test control method for the cladding optical stripper as described in claim 1, characterized in that, The step of acquiring and calculating the cladding light filtering efficiency of the test object based on the power of the cladding beam and the power of the first beam, combined with the energy ratio, includes the following steps: The residual cladding optical power passing through the test object is obtained and calculated based on the splitting ratio of the beam splitting module and the power of the first beam. The power of the cladding beam is obtained, and the cladding light filtering efficiency of the test object is calculated based on the power of the cladding beam, the residual cladding light power, and the energy ratio.

9. The test control method for the cladding optical stripper as described in claim 1, characterized in that, If the power of the cladding beam generated by the light source module is set to P0, and the power of the first beam is set to P1, then P1 ≥ 0.99P0.

10. A testing device for a cladding optical stripper, characterized in that, include: The light source module is used to generate the cladding beam; The beam splitter module splits the residual cladding beam passing through the object under test into a first beam and a second beam. A power testing module is used to test the power of the first beam; An imaging module is used to acquire the spot imaging information of the second beam; as well as, The controller is used to electrically connect the light source module, the power test module, and the imaging module; The controller includes a memory, a processor, and a test control program for the cladding optical stripper stored in the memory and executable on the processor. When the test control program for the cladding optical stripper is executed by the processor, it implements the steps of the test control method for the cladding optical stripper as described in any one of claims 1 to 9.

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