Optical fiber cavity test method and system, storage medium and test equipment

Abstract

The invention relates to the technical field of optical fiber testing, in particular to an optical fiber cavity testing method and system, a storage medium and testing equipment. The method comprises the following steps: installing an experimental optical fiber in an optical fiber cavity test system, performing an experiment on the experimental optical fiber under a preset condition, acquiring experimental spectrum information of oscillation light received by a spectrum detection device in real time, acquiring a preset cutoff point of the experimental optical fiber, continuously monitoring the experimental spectrum information, and determining the optical fiber cavity test result. When the experiment frequency spectrum information meets a preset requirement, the optical fiber is cut off at a preset cut-off point, the experiment mode field diameter of the cut-off experiment optical fiber is obtained, the experiment frequency spectrum information and the experiment mode field diameter which meet the preset requirement are associated and stored in a pre-established database, and the optical fiber to be tested is installed in an optical fiber cavity testing system. And testing the to-be-tested optical fiber under a preset condition, obtaining the current spectrum information of the oscillation light received by the spectrum detection device, and obtaining the target mode field diameter of the to-be-tested optical fiber according to the current spectrum information and the database. The optical fiber detection efficiency can be improved.

Description

Technical Field

[0001] The present invention relates to the field of optical fiber testing technology, in particular to an optical fiber cavity testing method, system, storage medium and testing equipment. Background Art

[0002] The mode field diameter of an optical fiber refers to the diameter of the core part of the optical fiber that transmits the optical signal. The mode field diameter is closely related to the transmission characteristics and performance of the optical fiber, and has an important influence on the transmission loss, coupling efficiency and propagation characteristics of the optical signal. With the continuous development of optical communication technology and the demand for higher requirements for communication data transmission, the accuracy requirements of the mode field diameter of optical fiber are also increasing.

[0003] In the process of optical fiber production, it is usually necessary to test the mode field diameter of the produced optical fiber to determine whether the mode field diameter of the optical fiber meets the requirements. In the prior art, the truncation method is usually used to truncate the optical fiber at two truncation points of the optical fiber, and the optical power at the two truncation points and the distance between the two truncation points are measured to measure the mode field diameter of the optical fiber with high accuracy. However, the disadvantage is that the truncation method requires truncation of the optical fiber, which is easy to lead to waste of optical fiber resources in large-scale production, affecting the efficiency of optical fiber detection. Summary of the invention

[0004] The technical problem to be solved by the embodiments of the present invention is to provide a fiber cavity testing method, system, storage medium and testing equipment to solve the problem in the prior art that fiber resources are easily wasted and the fiber detection efficiency is affected.

[0005] The optical fiber cavity testing method provided in the embodiment of the present invention is applied to an optical fiber cavity testing system, and the optical fiber cavity testing system includes: an optical transmitter, which is used to emit test light; an oscillation module, which includes a first oscillation component and a second oscillation component, wherein the first oscillation component is connected to the optical transmitter, and the optical fiber to be tested is connected between the first oscillation component and the second oscillation component, so that the test light oscillates in an oscillation cavity constructed by the first oscillation component, the optical fiber to be tested and the second oscillation component, and is emitted from the first oscillation component; a spectral detection device, which is connected to the first oscillation component and is used to receive the oscillated light output by the first oscillation component.

[0006] The fiber cavity testing method comprises: installing an experimental optical fiber in the fiber cavity testing system, conducting an experiment on the experimental optical fiber under preset conditions, and acquiring in real time experimental spectrum information of the oscillating light received by the spectrum detection device; acquiring a preset cutoff point of the experimental optical fiber, continuously monitoring the experimental spectrum information, and cutting off the experimental optical fiber at the preset cutoff point when the experimental spectrum information meets preset requirements; acquiring an experimental mode field diameter of the cut experimental optical fiber, associating the experimental spectrum information that meets the preset requirements with the experimental mode field diameter and storing them in a pre-established database; installing the optical fiber to be tested in the fiber cavity testing system, conducting a test on the optical fiber to be tested under the preset conditions, and acquiring current spectrum information of the oscillating light received by the spectrum detection device; and acquiring a target mode field diameter of the optical fiber to be tested based on the current spectrum information and the database.

[0007] Optionally, the step of continuously monitoring the experimental spectrum information includes: collecting the experimental spectrum information according to a preset comparison period; the step of truncating the experimental optical fiber at the preset truncation point when the experimental spectrum information meets the preset requirements includes: acquiring the spectrum information of the test light for the experimental spectrum information collected within the current comparison period, normalizing the experimental spectrum information based on the spectrum information, and acquiring the experimental oscillation spectrum information contained in the experimental spectrum information; acquiring a preset detection interval, dividing the experimental oscillation spectrum according to the detection interval, acquiring multiple interval oscillation spectra, and acquiring the experimental transmittance of each interval oscillation spectrum; judging whether the current experimental spectrum information meets the preset requirements based on the experimental transmittance of the interval oscillation spectrum.

[0008] Optionally, the step of judging whether the current experimental spectrum information meets the preset requirements based on the experimental transmittance of the current interval oscillation spectrum also includes: comparing the experimental transmittance of each interval oscillation spectrum corresponding to the current comparison period with the experimental transmittance of each interval oscillation spectrum corresponding to the previous comparison period one by one; obtaining the change value of the experimental transmittance corresponding to each detection interval; when all the change values ​​are greater than or equal to the judgment threshold, judging that the current experimental oscillation spectrum information meets the preset requirements; when there is at least one change value less than the judgment threshold, judging that the current experimental oscillation spectrum information does not meet the preset requirements.

[0009] Optionally, the step of obtaining the experimental mode field diameter of the truncated experimental optical fiber, associating the experimental spectrum information that meets the preset requirements with the experimental mode field diameter, and storing them in a pre-established database includes: when the experimental spectrum information meets the preset requirements, truncating the experimental optical fiber at the preset truncation point, obtaining the mode field diameter of the truncated experimental optical fiber, and using the mode field diameter as the current experimental mode field diameter; associating the experimental transmittance corresponding to each current interval oscillation spectrum with the current experimental mode field diameter and storing them in a pre-established database.

[0010] Optionally, the step of obtaining the current mode field diameter of the optical fiber to be tested based on the current spectrum information and the database includes: obtaining the spectrum information of the test light, normalizing the current spectrum information based on the spectrum information, and obtaining current oscillation spectrum information contained in the current spectrum information; dividing the current oscillation spectrum according to the detection interval, obtaining multiple current interval oscillation spectra, and obtaining the current transmittance of each current interval oscillation spectrum; searching for all the interval oscillation spectra in the database, matching the current transmittance with the experimental transmittance in the database one by one, and using the successfully matched experimental mode field diameter as the target mode field diameter.

[0011] Another technical solution adopted by the present invention to solve its technical problem is: to provide a fiber cavity test system, the fiber cavity test system comprising: a light transmitter, used to emit test light; an oscillation module, including a first oscillation component and a second oscillation component, the first oscillation component is connected to the light transmitter, and the optical fiber to be tested is connected between the first oscillation component and the second oscillation component, so that the test light oscillates in an oscillation cavity constructed by the first oscillation component, the optical fiber to be tested and the second oscillation component, and is emitted from the first oscillation component; a spectrum detection device, connected to the first oscillation component, used to receive the oscillation light output by the first oscillation component, and obtain current spectrum information of the oscillation light; a calculation unit, connected to the spectrum detection device, used to implement the steps of the above method.

[0012] Optionally, the optical fiber cavity test system also includes an optical circulator, which includes a first port, a second port and a third port, the first port is connected to the optical transmitter, the third port is connected to the spectrum detection device, and the second port is connected to the first oscillation component, and is used to input test light into the first oscillation component and input oscillation light emitted by the first oscillation component into the third port.

[0013] Optionally, the first oscillation component includes a spectroscopic diaphragm, which is used to transmit a portion of the test light reflected by the second oscillation component to the spectrum detection device, and reflect another portion of the test light reflected by the second oscillation component back to the second oscillation component, and the second oscillation component includes a total reflection mirror, which is used to reflect the received light to the spectroscopic diaphragm.

[0014] Another technical solution adopted by the present invention to solve its technical problem is: providing a computer-readable storage medium storing a computer program, wherein when the computer program is executed by a processor, the processor executes the steps of the method described above.

[0015] Another technical solution adopted by the present invention to solve its technical problem is: to provide a testing device, including a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the above method.

[0016] Compared with the prior art, the fiber cavity testing method provided by the embodiment of the present invention has the beneficial effect that: the fiber cavity testing method of the present invention includes installing the experimental fiber in the fiber cavity testing system, and conducting experiments on the experimental fiber under preset conditions, so as to obtain the experimental spectrum information of the oscillating light received by the spectrum detection device in real time, and then obtain the preset cutoff point of the experimental fiber, continuously monitor the experimental spectrum information, and cut the fiber at the preset cutoff point when the experimental spectrum information meets the preset requirements to obtain the experimental mode field diameter of the cut experimental fiber, and associate the experimental spectrum information and the experimental mode field diameter that meet the preset requirements and store them in a pre-established database, so as to obtain the data relationship between the experimental spectrum information and the mode field diameter of the experimental fiber. Then, the optical fiber to be tested is installed in the optical fiber cavity testing system, and the optical fiber to be tested is tested under preset conditions, and the current spectrum information of the oscillating light received by the spectrum detection device is obtained, and the target mode field diameter of the optical fiber to be tested is obtained according to the current spectrum information and the database. Therefore, the present invention can obtain the spectrum information of the optical fiber to be tested through the optical fiber cavity test system, and match it with the experimental spectrum information in the database, and use the data relationship between the experimental spectrum information in the database and the mode field diameter of the experimental optical fiber to obtain the mode field diameter of the optical fiber to be tested, so that the mode field diameter of the production optical fiber can be easily obtained during optical fiber production, the efficiency of optical fiber detection is improved, and the optical fiber does not need to be cut during optical fiber production, avoiding wasting optical fiber resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The specific implementation of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments, in which:

[0018] Figure 1It is a flow chart of an embodiment of a method for testing an optical fiber cavity provided by an embodiment of the present invention;

[0019] Figure 2 is a structural schematic diagram of an embodiment of a fiber cavity testing system provided by an embodiment of the present invention;

[0020] Figure 3 is a schematic structural diagram of an embodiment of a computer-readable storage medium provided by the present invention;

[0021] Figure 4 It is a structural schematic diagram of an embodiment of the testing device provided by the present invention.

[0022] The reference numerals in the figures are:

[0023] 10. Optical fiber cavity test system; 11. Optical transmitter; 12. Oscillation module; 121. First oscillation component; 1211. Spectral diaphragm; 122. First oscillation component; 1221. Total reflection mirror; 13. Spectral detection device; 14. Optical circulator;

[0024] 30. Computer readable storage medium; 31. Computer program;

[0025] 40. Test equipment; 41. Processor; 42. Memory. DETAILED DESCRIPTION

[0026] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. Now, in conjunction with the accompanying drawings, the preferred embodiments of the present invention are described in detail.

[0027] The present invention provides a method for testing an optical fiber cavity. Figure 1 , Figure 1 It is a flow chart of an embodiment of the optical fiber cavity testing method provided by the present invention. The optical fiber cavity testing method provided by the present invention is applied to an optical fiber cavity testing system 10, and the optical fiber cavity testing system 10 includes an optical transmitter 11, an oscillation module 12, and a spectrum detection device 13. Among them, the optical transmitter 11 is used to emit test light; the oscillation module 12 includes a first oscillation component 121 and a second oscillation component 122, the first oscillation component 121 is connected to the optical transmitter 11, and the optical fiber to be tested is connected between the first oscillation component 121 and the second oscillation component 122, so that the test light oscillates in the oscillation cavity constructed by the first oscillation component 121, the optical fiber to be tested, and the second oscillation component 122, and is emitted from the first oscillation component 121; the spectrum detection device 13 is connected to the first oscillation component 121, and is used to receive the oscillated light output by the first oscillation component 121. The optical fiber cavity testing method provided by the present invention includes the following steps:

[0028] S101: Install the experimental optical fiber in the optical fiber cavity test system 10, conduct an experiment on the experimental optical fiber under preset conditions, and obtain experimental spectrum information of the oscillating light received by the spectrum detection device 13 in real time.

[0029] In a specific implementation scenario, the experimental optical fiber is installed in the optical fiber cavity test system 10, and the experimental optical fiber is tested under preset conditions. The preset conditions include the burning temperature and the burning time. The experimental optical fiber can be burned at the same burning temperature and different burning time, or at different burning temperatures and the same burning time to change the optical fiber cavity of the experimental optical fiber, that is, the mode field diameter of the experimental optical fiber changes.

[0030] Preferably, in this embodiment, the experimental optical fiber is heated for different lengths of time at a specific temperature to change the mode field diameter of the experimental optical fiber, and the experimental spectrum information of the oscillating light received by the spectrum detection device 13 is obtained in real time. Specifically, when the experimental optical fiber is installed in the optical fiber cavity test system 10 for experiment, the optical fiber cavity of the experimental optical fiber can form an oscillation cavity with the first oscillation component 121 and the second oscillation component 122, so that the experimental spectrum information of the oscillating light can be obtained in real time through the spectrum detection device 13 to reflect the mode field diameter of the experimental optical fiber.

[0031] S102: Obtain a preset cutoff point of the experimental optical fiber, continuously monitor the experimental spectrum information, and cut off the experimental optical fiber at the preset cutoff point when the experimental spectrum information meets the preset requirements.

[0032] In a specific implementation scenario, the experimental spectrum information is collected according to a preset comparison period, and the spectrum information of the test light is obtained for the experimental spectrum information collected in the current comparison period, and the experimental spectrum information is normalized based on the spectrum information to obtain the experimental oscillation spectrum information contained in the experimental spectrum information. Specifically, the experimental spectrum information of the oscillating light includes the spectrum information of the test light and the oscillation spectrum information, and the mode field diameter of the experimental optical fiber is closely related to the oscillation spectrum information. Therefore, after the spectrum information of the test light is obtained and the experimental spectrum information is normalized based on the spectrum information, the spectrum information of the test light in the experimental spectrum information can be normalized, thereby obtaining the oscillation spectrum information, avoiding the interference of the spectrum information of the test light on the test of the mode field diameter, and ensuring the accuracy of the detection result.

[0033] After the oscillation spectrum information is obtained, a detection interval is preset so as to divide the experimental oscillation spectrum according to the detection interval, thereby obtaining multiple interval oscillation spectra, and obtaining the experimental transmittance of each interval oscillation spectrum. Specifically, the experimental oscillation spectrum includes the wavelength of the oscillating light and the transmittance of the oscillating light, wherein the detection interval is a detection wavelength interval set according to the wavelength range of the oscillating light, thereby the experimental oscillation spectrum can be divided according to the detection interval to form a more refined interval oscillation spectrum, and the experimental transmittance of each interval oscillation spectrum is obtained. Compared with obtaining the transmittance data of all wavelengths in the experimental oscillation spectrum, the implementation of this embodiment can ensure that the detection results have sufficient accuracy while also reducing the amount of data and improving the detection efficiency.

[0034] It is determined whether the current experimental spectrum information meets the preset requirements according to the experimental transmittance of the interval oscillation spectrum, so as to determine whether to cut off the experimental optical fiber at the preset cutoff point.

[0035] In a specific implementation scenario, the experimental transmittance of each interval oscillation spectrum corresponding to the current comparison period is compared with the experimental transmittance of each interval oscillation spectrum corresponding to the previous comparison period, thereby obtaining the change value of the experimental transmittance corresponding to each detection interval, so as to judge whether the current experimental spectrum information meets the preset requirements according to the change value. Specifically, when all the change values ​​are greater than or equal to the judgment threshold, it is judged that the current experimental oscillation spectrum information meets the preset requirements; when there is at least one change value less than the judgment threshold, it is judged that the current experimental oscillation spectrum information does not meet the preset requirements.

[0036] It can be understood that when the change value of the experimental transmittance is greater than or equal to the judgment threshold, it indicates that the mode field diameter of the experimental optical fiber has changed. In order to ensure the accuracy of the judgment result, this embodiment determines that the current experimental oscillation spectrum information meets the preset requirements only when all the change values ​​are greater than or equal to the judgment threshold, that is, it is determined that the mode field diameter of the optical fiber has changed, and the experimental optical fiber needs to be cut off to obtain the mode field diameter of the experimental optical fiber. When there is at least one change value less than the judgment threshold, it is determined that the current experimental oscillation spectrum information does not meet the preset requirements, that is, it is determined that the mode field diameter of the experimental optical fiber has not changed, and the preset conditions are maintained to continue burning the experimental optical fiber.

[0037] S103: Acquire the experimental mode field diameter of the truncated experimental optical fiber, associate the experimental spectrum information that meets the preset requirements with the experimental mode field diameter, and store them in a pre-established database.

[0038] In a specific implementation scenario, when the experimental spectrum information meets the preset requirements, the experimental optical fiber is cut off at the preset cutoff point, the mode field diameter of the cut experimental optical fiber is obtained, and the mode field diameter of the experimental optical fiber is used as the current experimental mode field diameter; the experimental transmittance corresponding to each current interval oscillation spectrum is associated with the current experimental mode field diameter and stored in a pre-established database. When the experimental spectrum information does not meet the preset requirements, the experimental mode field diameter obtained at the last preset requirement is used as the current experimental mode field diameter. By implementing this embodiment, it is possible to accurately determine whether the mode field diameter of the experimental optical fiber has changed, so that the experimental optical fiber is cut off at the point where the mode field diameter changes, and the experimental mode field diameter of the cut experimental optical fiber is obtained. Therefore, on the one hand, each change point of the mode field diameter can be accurately obtained to ensure that the database can store rich experimental spectrum information and experimental mode field diameter related data, and on the other hand, it can avoid the situation where the optical fiber is cut off without changing the mode field diameter, thereby saving optical fiber resources and improving efficiency.

[0039] S104 : installing the optical fiber to be tested in the optical fiber cavity testing system 10 , testing the optical fiber to be tested under preset conditions, and acquiring current spectrum information of the oscillating light received by the spectrum detection device 13 .

[0040] In a specific implementation scenario, after rich and complete experimental transmittance and experimental mode field diameter correlation data are stored in the database through experiments, during the production process of optical fibers, the produced optical fiber to be tested can be installed in the optical fiber cavity testing system 10, and the optical fiber to be tested can be tested under the same preset conditions as the experiment, and the current spectrum information of the oscillating light received by the spectrum detection device 13 can be obtained, so that the target mode field diameter of the optical fiber to be tested can be obtained based on the current spectrum information and the database.

[0041] S105: Acquire a target mode field diameter of the optical fiber to be tested according to the current spectrum information and the database.

[0042] In a specific implementation scenario, the spectrum information of the test light is obtained, the current spectrum information is normalized based on the spectrum information, and the current oscillation spectrum information contained in the current spectrum information is obtained; the current oscillation spectrum is divided according to the detection interval, a plurality of current interval oscillation spectra are obtained, and the current transmittance of each current interval oscillation spectrum is obtained; all interval oscillation spectra in the database are searched, the current transmittance is matched one by one with the experimental transmittance in the database, and the successfully matched experimental mode field diameter is used as the target mode field diameter.

[0043] Specifically, after obtaining the current transmittance of each current interval oscillation spectrum of the optical fiber to be tested, the current transmittance of each current interval oscillation spectrum can be matched one by one with the experimental transmittance corresponding to each interval oscillation spectrum in the database by searching the database, and the experimental mode field diameter associated with the successfully matched experimental transmittance is used as the target mode field diameter. Thus, in the optical fiber production process, the spectrum information of the optical fiber to be tested can be obtained, and the mode field diameter of the optical fiber to be tested can be directly obtained by using the optical fiber cavity test system 10, thereby improving the convenience and efficiency of the detection of the optical fiber to be tested, so that the accurate optical fiber mode field diameter can be obtained without cutting the optical fiber in the optical fiber production, thereby effectively avoiding the waste of optical fiber resources.

[0044] It can be known from the above description that the fiber cavity testing method of the present invention includes installing the experimental fiber in the fiber cavity testing system 10, and conducting experiments on the experimental fiber under preset conditions, so as to obtain the experimental spectrum information of the oscillating light received by the spectrum detection device 13 in real time, and then obtain the preset cutoff point of the experimental fiber, continuously monitor the experimental spectrum information, and cut the fiber at the preset cutoff point when the experimental spectrum information meets the preset requirements to obtain the experimental mode field diameter of the cut experimental fiber, and associate the experimental spectrum information and the experimental mode field diameter that meet the preset requirements and store them in a pre-established database, so as to obtain the data relationship between the experimental spectrum information and the mode field diameter of the experimental fiber. Then, the optical fiber to be tested is installed in the optical fiber cavity testing system 10, and the optical fiber to be tested is tested under preset conditions, and the current spectrum information of the oscillating light received by the spectrum detection device 13 is obtained, and the target mode field diameter of the optical fiber to be tested is obtained according to the current spectrum information and the database. Therefore, the present invention can obtain the spectrum information of the optical fiber to be tested through the optical fiber cavity test system 10, and match it with the experimental spectrum information in the database, and use the data relationship between the experimental spectrum information in the database and the mode field diameter of the experimental optical fiber to obtain the mode field diameter of the optical fiber to be tested, so that the mode field diameter of the production optical fiber can be easily obtained during optical fiber production, thereby improving the efficiency of optical fiber detection and making it unnecessary to cut the optical fiber during optical fiber production to avoid wasting optical fiber resources.

[0045] See also Figure 2 , Figure 2It is a structural schematic diagram of an embodiment of the optical fiber cavity test system 10 provided by the present invention. The optical fiber cavity test system 10 provided by the present invention includes an optical transmitter 11, an oscillation module 12, a spectrum detection device 13 and a calculation unit (not shown). Among them, the optical transmitter 11 is used to emit test light; the oscillation module 12 includes a first oscillation component 121 and a second oscillation component 122, the first oscillation component 121 is connected to the optical transmitter 11, and the optical fiber to be tested is connected between the first oscillation component 121 and the second oscillation component 122, so that the test light oscillates in the oscillation cavity constructed by the first oscillation component 121, the optical fiber to be tested and the second oscillation component 122, and is emitted from the first oscillation component 121; the spectrum detection device 13 is connected to the first oscillation component 121, and is used to receive the oscillation light output by the first oscillation component 121; the calculation unit is connected to the spectrum detection device 13, and is used to implement the above-mentioned method steps.

[0046] Among them, the step of continuously monitoring the experimental spectrum information includes: collecting the experimental spectrum information according to a preset comparison period; the step of cutting off the experimental optical fiber at a preset cutoff point when the experimental spectrum information meets the preset requirements includes: obtaining the spectrum information of the test light for the experimental spectrum information collected within the current comparison period, normalizing the experimental spectrum information based on the spectrum information, and obtaining the experimental oscillation spectrum information contained in the experimental spectrum information; obtaining a preset detection interval, dividing the experimental oscillation spectrum according to the detection interval, obtaining multiple interval oscillation spectra, and obtaining the experimental transmittance of each interval oscillation spectrum; judging whether the current experimental spectrum information meets the preset requirements according to the experimental transmittance of the interval oscillation spectrum.

[0047] Among them, the step of judging whether the current experimental spectrum information meets the preset requirements based on the experimental transmittance of the current interval oscillation spectrum also includes: comparing the experimental transmittance of each interval oscillation spectrum corresponding to the current comparison period with the experimental transmittance of each interval oscillation spectrum corresponding to the previous comparison period one by one; obtaining the change value of the experimental transmittance corresponding to each detection interval; when all the change values ​​are greater than or equal to the judgment threshold, judging that the current experimental oscillation spectrum information meets the preset requirements; when there is at least one change value less than the judgment threshold, judging that the current experimental oscillation spectrum information does not meet the preset requirements.

[0048] Among them, the steps of obtaining the experimental mode field diameter of the truncated experimental optical fiber, associating the experimental spectrum information that meets the preset requirements with the experimental mode field diameter and storing them in a pre-established database include: when the experimental spectrum information meets the preset requirements, truncating the experimental optical fiber at a preset truncation point, obtaining the mode field diameter of the truncated experimental optical fiber, and using the mode field diameter as the current experimental mode field diameter; associating the experimental transmittance corresponding to each current interval oscillation spectrum with the current experimental mode field diameter and storing them in a pre-established database.

[0049] The step of obtaining the current mode field diameter of the optical fiber to be tested according to the current spectrum information and the database includes: obtaining the spectrum information of the test light, normalizing the current spectrum information based on the spectrum information, and obtaining the current oscillation spectrum information contained in the current spectrum information;

[0050] The current oscillation spectrum is divided according to the detection interval, multiple current interval oscillation spectra are obtained, and the current transmittance of each current interval oscillation spectrum is obtained; all interval oscillation spectra in the database are searched, the current transmittance is matched with the experimental transmittance in the database one by one, and the successfully matched experimental mode field diameter is used as the target mode field diameter.

[0051] In a specific implementation scenario, the optical fiber cavity test system 10 also includes an optical circulator 14, which includes a first port, a second port and a third port. The first port is connected to the optical transmitter 11, the third port is connected to the spectrum detection device 13, and the second port is connected to the first oscillation component 121, and is used to input the test light to the first oscillation component 121, and input the oscillation light emitted by the first oscillation component 121 to the third port. By setting the optical circulator 14, the test light emitted by the optical transmitter 11 can be injected into the optical circulator 14 from the first port, and then injected into the oscillation cavity constructed by the optical fiber to be tested and the second oscillation component 122 through the third port to oscillate, and the oscillating light formed after the oscillation can be transmitted from the second port to the third port and received by the spectrum detection device 13. It is worth mentioning that the loss parameter of the optical circulator 14 should be less than 0.5dB, and the isolation of the optical circulator 14 should be greater than 45dB, so that the performance parameters of the optical circulator 14 can eliminate the influence of the optical circulator 14 on the oscillation light.

[0052] In a specific implementation scenario, the first oscillation component 121 includes a spectroscopic diaphragm 1211, which is used to transmit a portion of the test light reflected by the second oscillation component 122 to the spectral detection device 13, and another portion of the test light reflected by the second oscillation component 122 is reflected back to the second oscillation component 122. The second oscillation component 122 includes a total reflection mirror 1221, which is used to reflect the received light to the spectroscopic diaphragm 1211.

[0053] Specifically, the reflectivity of the beam splitter 1211 is greater than or equal to 50% and less than or equal to 80%, and the reflectivity of the total reflection mirror 1221 is greater than 99.25%, so that the first oscillation component 121, the optical fiber to be tested and the second oscillation component 122 can construct a back-and-forth oscillation cavity, so that the test light can pass through the optical fiber cavity of the optical fiber to be tested multiple times during oscillation, so that the oscillated light received by the spectrum detection device 13 can fully reflect the optical fiber cavity characteristics of the optical fiber to be tested, thereby effectively improving the test accuracy of the mode field diameter.

[0054] See also Figure 3 , Figure 33 is a schematic diagram of a computer readable storage medium 30 according to an embodiment of the present invention. The computer readable storage medium 30 stores at least one computer program 31, which is executed by a processor to implement the following Figure 1 In one embodiment, the computer readable storage medium 30 may be a storage chip, a hard disk, a mobile hard disk, a USB flash drive, an optical disk, or other readable and writable storage tools in the final layer, or a server, etc.

[0055] In one embodiment, the computer-readable storage medium 30 may be a storage chip, a hard disk, or a mobile hard disk, a USB flash drive, an optical disk, or other readable and writable storage tools in a terminal, or a server, etc.

[0056] See also Figure 4 , Figure 4 4 is a schematic diagram of a structure of an embodiment of a test device 40 provided by the present invention. The test device 40 includes a processor 41 and a memory 42. The processor 41 is coupled to the memory 42. The memory 42 stores a computer program 31. The processor 41 executes the computer program 31 when working to implement the following. Figure 1 The method shown.

[0057] The technical details of the specific method implemented when the above-mentioned test device 40 executes the computer program 31 have been discussed in detail in the above-mentioned method steps, so they will not be repeated here.

[0058] A person skilled in the art can understand that all or part of the processes in the above-mentioned embodiment method can be implemented by instructing the relevant hardware through a computer program 31. The computer program 31 can be stored in a non-volatile computer-readable storage medium 30. When the program is executed, it can include the processes of the embodiments of the above-mentioned methods.

[0059] Among them, any reference to memory, storage, database or other media used in the embodiments provided in the present application may include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0060] It should be noted that the limitations on the various steps involved in this scheme, without affecting the implementation of the specific scheme, are not deemed to limit the order of the steps. The steps written in the front can be executed first, or can be executed later, or even simultaneously. As long as this scheme can be implemented, it should be regarded as belonging to the scope of protection of the present invention.

[0061] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. For those skilled in the art, the technical solutions described in the above embodiments can be modified, or some of the technical features therein can be replaced by equivalents; and all these modifications and replacements should fall within the protection scope of the claims attached to the present invention.

Claims

1. A method for testing an optical fiber cavity, characterized in that: The method is applied to an optical fiber cavity testing system, and the optical fiber cavity testing system comprises: A light emitter, used for emitting a test light; An oscillation module, comprising a first oscillation component and a second oscillation component, wherein the first oscillation component is connected to the optical transmitter, and the optical fiber to be tested is connected between the first oscillation component and the second oscillation component, so that the test light oscillates in an oscillation cavity constructed by the first oscillation component, the optical fiber to be tested and the second oscillation component, and is emitted from the first oscillation component; A spectrum detection device, connected to the first oscillating component, and used to receive the oscillation light output by the first oscillating component; The optical fiber cavity testing method comprises: Installing the experimental optical fiber in the optical fiber cavity test system, conducting an experiment on the experimental optical fiber under preset conditions, and acquiring experimental spectrum information of the oscillating light received by the spectrum detection device in real time; Obtaining a preset cutoff point of the experimental optical fiber, continuously monitoring the experimental spectrum information, and cutting off the experimental optical fiber at the preset cutoff point when the experimental spectrum information meets preset requirements; Acquire the experimental mode field diameter of the truncated experimental optical fiber, associate the experimental spectrum information that meets the preset requirements with the experimental mode field diameter, and store them in a pre-established database; Installing the optical fiber to be tested in the optical fiber cavity test system, testing the optical fiber to be tested under the preset conditions, and obtaining current spectrum information of the oscillating light received by the spectrum detection device; The target mode field diameter of the optical fiber to be tested is obtained according to the current spectrum information and the database.

2. The optical fiber cavity testing method according to claim 1, characterized in that: The step of continuously monitoring the experimental spectrum information includes: Collecting the experimental spectrum information according to a preset comparison period; The step of truncating the experimental optical fiber at the preset truncation point when the experimental spectrum information meets the preset requirements includes: For the experimental spectrum information collected in the current comparison period, the spectrum information of the test light is obtained, and the experimental spectrum information is normalized based on the spectrum information to obtain the experimental oscillation spectrum information contained in the experimental spectrum information; Obtaining a preset detection interval, dividing the experimental oscillation spectrum according to the detection interval, obtaining a plurality of interval oscillation spectra, and obtaining the experimental transmittance of each of the interval oscillation spectra; It is determined whether the current experimental spectrum information meets the preset requirement according to the experimental transmittance of the interval oscillation spectrum.

3. The optical fiber cavity testing method according to claim 2, characterized in that: The step of judging whether the current experimental spectrum information meets the preset requirement according to the experimental transmittance of the current interval oscillation spectrum also includes: Comparing the experimental transmittance of each of the interval oscillation spectra corresponding to the current comparison period with the experimental transmittance of each of the interval oscillation spectra corresponding to the previous comparison period in a one-to-one correspondence; Obtaining a change value of the experimental transmittance corresponding to each detection interval; When all of the change values ​​are greater than or equal to the judgment threshold, it is determined that the current experimental oscillation spectrum information meets the preset requirement; When there is at least one of the change values ​​that is smaller than the judgment threshold, it is determined that the current experimental oscillation spectrum information does not meet the preset requirement.

4. The optical fiber cavity testing method according to claim 3, characterized in that: The step of obtaining the experimental mode field diameter of the truncated experimental optical fiber, associating the experimental spectrum information that meets the preset requirements with the experimental mode field diameter and storing them in a pre-established database includes: When the experimental spectrum information meets the preset requirement, the experimental optical fiber is cut off at the preset cutoff point, the mode field diameter of the cut experimental optical fiber is obtained, and the mode field diameter is used as the current experimental mode field diameter; The experimental transmittance corresponding to each current interval oscillation spectrum and the current experimental mode field diameter are associated and stored in a pre-established database.

5. The optical fiber cavity testing method according to any one of claims 2 to 4, characterized in that: The step of acquiring the current mode field diameter of the optical fiber to be tested according to the current spectrum information and the database comprises: Acquire spectrum information of the test light, perform normalization processing on the current spectrum information based on the spectrum information, and acquire current oscillation spectrum information contained in the current spectrum information; Dividing the current oscillation spectrum according to the detection interval, obtaining a plurality of current interval oscillation spectra, and obtaining a current transmittance of each of the current interval oscillation spectrum; All the interval oscillation spectra in the database are searched, the current transmittance is matched one by one with the experimental transmittance in the database, and the experimental mode field diameter that is successfully matched is used as the target mode field diameter.

6. A fiber cavity testing system, characterized in that: include: A light emitter, used for emitting a test light; An oscillation module, comprising a first oscillation component and a second oscillation component, wherein the first oscillation component is connected to the optical transmitter, and the optical fiber to be tested is connected between the first oscillation component and the second oscillation component, so that the test light oscillates in an oscillation cavity constructed by the first oscillation component, the optical fiber to be tested and the second oscillation component, and is emitted from the first oscillation component; A spectrum detection device, connected to the first oscillating component, for receiving the oscillating light output by the first oscillating component and acquiring current spectrum information of the oscillating light; A computing unit, connected to the spectrum detection device, is used to implement the method described in any one of claims 1-5.

7. The optical fiber cavity testing system according to claim 6, characterized in that: The optical fiber cavity test system also includes an optical circulator, which includes a first port, a second port and a third port. The first port is connected to the optical transmitter, the third port is connected to the spectrum detection device, and the second port is connected to the first oscillation component, and is used to input test light into the first oscillation component and input oscillation light emitted by the first oscillation component into the third port.

8. The optical fiber cavity testing system according to claim 6, characterized in that: The first oscillation component includes a spectroscopic diaphragm, which is used to transmit a part of the test light reflected by the second oscillation component to the spectrum detection device, and reflect another part of the test light reflected by the second oscillation component back to the second oscillation component. The second oscillation component includes a total reflection mirror, which is used to reflect the received light to the spectroscopic diaphragm.

9. A computer-readable storage medium, characterized in that: A computer program is stored, and when the computer program is executed by a processor, the processor is caused to perform the steps of the method according to any one of claims 1 to 5.

10. A testing device, characterized in that: The method comprises a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the method according to any one of claims 1 to 5.

Images