CN114915335A - Polarity testing method and device based on wavelength division multiplexing - Google Patents
Polarity testing method and device based on wavelength division multiplexing Download PDFInfo
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Abstract
The application discloses a polarity testing method and device based on wavelength division multiplexing. According to the polarity testing method, main input light with composite wavelength is provided, and the main input light is subjected to wave splitting to form a plurality of paths of sub input light with different wavelengths; respectively butting input light of multiple paths of sub-circuits to the input end of a product to be tested; the multi-path output light output by the output ends of the product to be tested is received through the single-wave filters in a one-to-one correspondence mode, and whether the channel polarity corresponding to the output light of one path in the product to be tested is correct or not can be simply and visually judged by detecting whether the output light of each path can penetrate through the corresponding single-wave filter. The polarity of each channel in a product to be tested with multiple channels is tested simultaneously through the wave division and the optical filters arranged correspondingly, the process is simple, and the energy consumption is reduced by using the composite light source.
Description
Technical Field
The present application relates to the field of optical transmission detection, and in particular, to a polarity testing method and apparatus based on wavelength division multiplexing.
Background
The polarity is also called a route sequence, and represents the transmission correspondence from the A terminal to the B terminal during multi-channel transmission. The polarity test is a method for detecting the routing relationship of optical fibers, can correctly judge whether the routing line sequence relationship of a product meets the design of the product or not through the polarity test, and is an indispensable procedure in the production process of multi-path optical fiber products.
In the traditional polarity test method, a plurality of luminous sources are used for corresponding to each channel of a product to be tested, all the luminous sources emit light during testing, then the other end of the product uses the same number of receiving devices to perform receiving judgment, or the light emitting mode is performed in sequence, and after a first channel is correct, a second channel light source is excited to emit light, and judgment is performed in sequence. However, the polarity testing method has complicated process and large energy consumption.
Disclosure of Invention
The application provides a polarity testing method and device based on wavelength division multiplexing, and aims to solve the problems that a multichannel polarity testing process is complex and energy consumption is high.
In order to solve the technical problem, the application adopts a technical scheme that: a polarity test method based on wavelength division multiplexing is provided, and comprises the following steps: providing primary input light of a composite wavelength; the main input light is subjected to wave splitting to form a plurality of paths of sub input light with different wavelengths; respectively butting the multiple paths of sub input light with the input ends of products to be tested; receiving multi-path output light output by a plurality of output ends of the product to be tested in a one-to-one correspondence mode through a plurality of single-wave filters; and judging whether the polarity of a channel corresponding to the output light of the corresponding path in the product to be tested is correct or not by detecting whether the output light of each path can pass through the corresponding single-wave optical filter or not.
Further, the step of determining whether the polarity of the channel corresponding to the output light of the corresponding path in the product to be tested is correct by detecting whether the output light of each path can pass through the corresponding single-wave filter includes: if the output light of the first path can pass through the corresponding single-wave optical filter, the polarity of a channel corresponding to the output light of the first path in the product to be tested is correct; and if the output light of the second path cannot pass through the corresponding single-wave filter, the polarity of a channel corresponding to the output light of the second path in the product to be tested is incorrect.
Further, the step of detecting whether the output light of each path can pass through the corresponding single-wave filter includes: the output light of each path is accessed to the access port of the corresponding single-wave optical filter; detecting an optical signal at an output interface end of the single-wave optical filter; and judging whether the output light of each path can pass through the corresponding single-wave optical filter or not by detecting whether the optical signal can be received or not.
Further, the step of determining whether the output light of each path can pass through the corresponding single-wave filter by detecting whether an optical signal can be received includes: if the output interface end of the single-wave optical filter corresponding to the first path of the output light detects an optical signal, the first path of the output light can pass through the corresponding single-wave optical filter; and if the output interface end of the single-wave optical filter corresponding to the output light of the second path does not detect the optical signal, the output light of the second path cannot pass through the corresponding single-wave optical filter.
Furthermore, the number of the plurality of single wave filters is the same as the number of the paths of the multipath sub-input light.
Furthermore, the multiple single-wave filters correspond to multiple paths of sub-input light with different wavelengths one by one, so that the multiple paths of sub-input light with different wavelengths before the input end of the product to be tested is butted can correspondingly pass through the multiple single-wave filters.
In order to solve the above technical problem, another technical solution adopted by the present application is: a polarity test device based on wavelength division multiplexing is provided. The polarity testing device based on wavelength division multiplexing comprises: the device comprises a light source input part and a detection part, wherein the light source input part and the detection part are both connected with a product to be tested; wherein the light source input part includes: the wave separator is used for separating the main input light with the composite wavelength to form a plurality of paths of sub input light with different wavelengths; the detection section includes: the optical filter comprises a plurality of single-wavelength optical filters and receives the multi-path output light output by the output ends of the product to be tested in a one-to-one correspondence mode through the single-wavelength optical filters; and the optical signal receiver is connected with the optical filters to detect whether the output light of each path can pass through the corresponding single-wave optical filter.
Furthermore, the plurality of optical signal receivers are arranged in one-to-one correspondence with the single-wavelength optical filters.
Further, the light source input part also comprises a broadband light source, and the broadband light source is connected with the wave splitter and provides main input light with composite wavelength for the wave splitter.
Furthermore, the broadband light source, the wave separator, the optical filter and the optical signal receiver are all provided with optical fiber coupling interfaces so as to realize the connection through optical fibers between the broadband light source and the wave separator and between the wave separator and the product to be tested, the product to be tested and the optical filter and the optical signal receiver.
The beneficial effect of this application is: the polarity test method is characterized in that main input light with composite wavelength is provided, and the main input light is subjected to wavelength division to form multiple paths of sub input light with different wavelengths; respectively butting multiple paths of input light with the input ends of products to be tested; the multi-path output light output by the output ends of the product to be tested is received through the single-wave filters in a one-to-one correspondence mode, and whether the channel polarity corresponding to the output light of one path in the product to be tested is correct or not can be simply and visually judged by detecting whether the output light of each path can penetrate through the corresponding single-wave filter. The polarity of each channel in a product to be tested with multiple channels is tested simultaneously through the wave division and the optical filters arranged correspondingly, the process is simple, and the energy consumption is reduced by using the composite light source.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the embodiments and the drawings used in the description of the prior art, and obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without inventive efforts.
Fig. 1 is a schematic flowchart of a first embodiment of a polarization testing method based on wavelength division multiplexing provided in the present application;
fig. 2 is a schematic flowchart of a second embodiment of a polarity testing method based on wavelength division multiplexing provided in the present application;
fig. 3 is a schematic structural diagram of a first embodiment of a polarization testing apparatus based on wavelength division multiplexing provided in the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms "first", "second" and "third" in this application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any indication of the number of technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of the feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specifically limited otherwise. All directional indications (such as up, down, left, right, front, and rear … …) in the embodiments of the present application are only used to explain the relative positional relationship between the components, the movement, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indication is changed accordingly. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements but may alternatively include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments without conflict. The following are detailed by specific examples.
The embodiment of the application provides a polarity testing method and device based on wavelength division multiplexing, and aims to solve the problems of complex procedures and high energy consumption of the existing polarity testing method. The Wavelength Division Multiplexing (WDM) combines a series of optical carrier signals carrying various information and having different wavelengths together by a Multiplexer (Multiplexer) at a transmitting end and couples the signals to the same optical fiber for transmission, and separates the optical signals having various wavelengths by a Demultiplexer (Demultiplexer) at a receiving end. This application is based on wavelength division multiplexing, with compound light wave separation into a plurality of single wavelength optical signal to correspond a plurality of passageways in the product that awaits measuring, and through the light filter that corresponds the setting, realize testing simultaneously to the polarity of each passageway in the product that awaits measuring that has the multichannel, the process is simple, and uses compound light source, has reduced the energy consumption. The following detailed description of the present application is made with reference to the drawings, which are as follows:
referring to fig. 1, fig. 1 is a schematic flowchart of a first embodiment of a polarization testing method based on wavelength division multiplexing provided by the present application, which specifically includes:
s101: a primary input light of a composite wavelength is provided.
In this embodiment, the main input light with the composite wavelength is provided to provide a light source for the wavelength division processing in step S102. The main input light is of a complex wavelength, that is, the main input light contains a wide range of frequency bands or frequencies. The conversion relation between the wavelength and the frequency is as follows: λ ═ V/f, where f denotes frequency, refers to the number of times periodic changes are made per unit time, and is a quantity describing how frequently the periodic movement is; λ denotes the wavelength, and refers to the distance a wave travels within one period of vibration. In one embodiment, this primary input light may be provided using a broadband light source or a coincident composite light source. Furthermore, the broadband light source comprises a composite light output port, and the output end outputs composite waves with a wide wavelength band.
S102: and splitting the main input light to form a plurality of paths of sub input light with different wavelengths.
In this embodiment, the main input light is an optical signal with a composite wavelength, and needs to be demultiplexed to separate multiple sub-input lights with different wavelengths. The splitting of the multiple sub-input light beams with different wavelengths may also be referred to as splitting multiple channels, where each channel is a single sub-input light beam. The separated sub input light of the channels can meet the requirement of carrying out polarity test on each channel of a multi-channel product to be tested.
In some embodiments, the splitting may be performed by a demultiplexer or a demultiplexer. The wave splitters have different types, and the wave splitters of different types can perform wave splitting processing on light in different frequency band ranges or wave band ranges, and the paths of multiple paths with different wavelengths separated by the wave splitters of different types may also be different, or the wavelengths of the separated single waves are different. The multi-path single wave separated by the wave separator is used for testing the polarity of each channel in the product to be tested, so that the model of the wave separator needs to be selected according to the product to be tested. Or, the path number of the sub input light to be branched and the single wave wavelength of the sub input light need to be selected according to the channel in the product to be tested. It can be understood that the branched sub-input light with different wavelengths at least includes a single-wave optical signal with a corresponding wavelength required for performing polarity test on each channel of the product to be tested, so as to perform polarity test on all channels of the product to be tested.
S103: and respectively butting the input light of the multiple paths of sub-circuits to the input end of the product to be tested.
And respectively butting the input light of the plurality of paths of sub-circuits to the input end of the product to be tested so as to provide a single-wave optical signal corresponding to each path of the product to be tested. Specifically, the input end of the product to be tested includes interfaces corresponding to a plurality of channels, and each single-wave input optical signal in the multi-channel input optical signal is butted with the interface of the corresponding channel, so as to input the single-wave input optical signal corresponding to each channel into the product to be tested.
S104: and receiving the multi-path output light output by the output ends of the product to be tested in a one-to-one correspondence mode through the single-wave optical filters.
After the multiple paths of sub input light with different wavelengths are correspondingly connected into the corresponding channels of the product to be tested, the corresponding output ends of the multiple channels are connected with the corresponding single-wave optical filters, namely, the output light of each path is connected into the corresponding access ends of the single-wave optical filters. The single-wave optical filters correspond to the multiple paths of sub-input light with different wavelengths one by one, so that the multiple paths of sub-input light with different wavelengths before the input end of the product to be tested is butted can correspondingly penetrate through the multiple single-wave optical filters. That is to say, when the polarity test is performed on the product to be tested, the single-wave filters receive the multiple paths of output light output by the multiple output ends of the product to be tested in a one-to-one correspondence manner, so that the filtering processing can be performed on each path of output light. However, the one-to-one correspondence of the plurality of single-wave filters may also be set correspondingly according to the multipath input light. In a specific embodiment, the path number of the sub-input light branched out is greater than the path number of the channels of the product to be tested, but the sub-input light connected into the product to be tested corresponds to the channels of the product to be tested one by one. Even if the single-wave filters correspond to the sub-input light one by one and the number of the single-wave filters is more than the number of the channels of the product to be tested, the number and the model of the single-wave filters correspondingly connected with the output end of the product to be tested need to correspond to the channels of the product to be tested one by one.
The filter is an optical device for selecting a wavelength band to be radiated, and can be used for selectively allowing light with a specific wavelength to pass through or allowing light with a wavelength in a specific range to pass through, and can also be used for selectively cutting off special wavelengths. While a single wave filter can only allow light of a specific single wavelength to pass through.
And S105, after the output end of the product to be tested is correspondingly connected with the plurality of single-wave optical filters.
S105: and judging whether the polarity of the channel corresponding to the output light of the corresponding path in the product to be tested is correct or not by detecting whether the output light of each path can pass through the corresponding single-wave filter or not.
Specifically, if the first path of output light can pass through the corresponding single-wave filter, the polarity of the channel corresponding to the first path of output light in the product to be tested is correct; and if the second path of output light cannot pass through the corresponding single-wave filter, the polarity of the channel corresponding to the output light in the product to be tested is incorrect.
In one embodiment, the product to be tested has 3 channels, channel 1, channel 2 and channel 3. The wavelength corresponding to each channel is λ 1 、λ 2 、λ 3 . Providing main input light with composite wavelength, and splitting the main input light to form 3 paths of sub-input light with different wavelengths, wherein the wavelengths are respectively lambda 1 、λ 2 、λ 3 . In this embodiment, the number of paths of the sub-input light formed by the wavelength division is the same as the number of channels of the product to be tested. The 3 paths of sub input light are respectively butted with the input ends of products to be tested, namely the input ends of the channel 1, the channel 2 and the channel 3 are respectively accessed. The output ends corresponding to the channel 1, the channel 2 and the channel 3 are respectively connected with three single-wave filters, that is, in this embodiment, the number of the single-wave filters is the same as the number of paths of the multipath input light. In which the single-wave filter 1 can only allow the wavelength lambda 1 The single-wave filter 2 can only allow the wavelength lambda 2 The single wave filter 3 can only allow the wavelength lambda 3 Is passed through. The single-wave filters correspondingly receive multiple paths of output light output by multiple output ends of the product to be tested one by one, and whether the polarity of a channel corresponding to one path of output light in the product to be tested is correct is judged by detecting whether each path of output light can pass through the corresponding single-wave filter. For example, wavelength λ 1 The sub input light is input to the input end of the channel 1 of the product to be tested, the output end of the channel 1 outputs corresponding output light, the output light is connected into the single-wave optical filter 1, and whether the polarity of the channel 1 is correct or not can be judged by judging whether the output light of the channel 1 can pass through the single-wave optical filter 1 or not. If the output light energy of the channel 1 passes through the single-wave optical filter 1, the polarity of the channel 1 in the product to be tested is correct; if the output light of the channel 1 cannot pass through the single wave filter 1, the light is to be filteredThe polarity of channel 1 in the test product is incorrect. This is because, if the polarity of channel 1 is correct, the wavelength of the output light obtained after the sub-input light passes through channel 1 is still λ 1 Wavelength λ 1 The output light of (1) is capable of passing through the single wave filter. If the polarity of channel 1 is incorrect, the wavelength of the output light obtained after the sub-input light passes through channel 1 is not λ 1 Whereas the single-wave filter 1 is only capable of allowing the wavelength λ 1 Of (2) thus, not lambda 1 The output light of the wavelength cannot pass through the single wave filter 1. Therefore, in this embodiment, it is practical, simple and convenient to determine whether the polarity of the channel corresponding to the output light of the corresponding path in the product to be tested is correct by detecting whether the output light of each path can pass through the corresponding single-wave filter. All channels in the product to be tested, including the channel 2 and the channel 3, are judged by the same method, so that the polarity of all the channels is tested, and whether the polarity of the whole product to be tested is correct or not is judged.
In the polarity testing method of the embodiment, the main input light with the composite wavelength is provided, and the main input light is subjected to wave splitting to form a plurality of paths of sub input light with different wavelengths; respectively butting input light of multiple paths of sub-circuits to the input end of a product to be tested; the multi-path output light output by the output ends of the product to be tested is received through the single-wave filters in a one-to-one correspondence mode, and whether the channel polarity corresponding to the output light of one path in the product to be tested is correct or not can be simply and visually judged by detecting whether the output light of each path can penetrate through the corresponding single-wave filter. The polarity of each channel in a product to be tested with multiple channels is tested simultaneously through the wave division and the optical filters arranged correspondingly, the process is simple, and the energy consumption is reduced by using the composite light source.
Referring to fig. 2, fig. 2 is a schematic flowchart of a polarity testing method based on wavelength division multiplexing according to a second embodiment of the present application, which specifically includes:
s201: a primary input light of a composite wavelength is provided.
S202: the main input light is subjected to wave splitting to form a plurality of paths of sub input light with different wavelengths.
S203: and respectively butting the input light of the multiple paths of sub-circuits to the input end of the product to be tested.
S204: and receiving the multi-path output light output by the output ends of the product to be tested in a one-to-one correspondence mode through the single-wave optical filters.
The specific implementation process of the steps S201 to S204 can refer to the implementation process of the steps S101 to S104 in the first embodiment, and will not be described herein again.
After the multiple paths of output light output by the multiple output ends of the product to be tested are received by using the multiple single-wave filters in one-to-one correspondence in the above steps S201 to S204, that is, after the output light of each path is accessed to the access end of the corresponding single-wave filter, step S205 is executed.
S205: and detecting an optical signal at an output interface end of the single-wave optical filter.
And (4) respectively accessing the multiple paths of output light passing through the multiple channels of the product to be tested into corresponding single-wave filters in a one-to-one correspondence manner, performing corresponding filtering processing on each path of output light through the single-wave filters, and performing optical signal detection at an output interface end of the single-wave filters so as to perform judgment in the step (S206).
S206: and judging whether the output light of each path can pass through the corresponding single-wave filter or not by detecting whether the optical signal can be received or not so as to judge whether the polarity of the channel corresponding to the output light of the path in the product to be tested is correct or not.
Whether the optical signal can be received or not is detected at the output end of the corresponding single-wave optical filter, and whether the output light of each path can penetrate through the corresponding single-wave optical filter or not can be judged. Specifically, if the output interface end of the single-wave optical filter corresponding to the first output light detects an optical signal, the first output light can pass through the corresponding single-wave optical filter; however, if the output interface end of the single-wave filter corresponding to the second output light does not detect the optical signal, it indicates that the second output light cannot pass through the corresponding single-wave filter. This is based on the fact that a single wave filter can only allow light of a specific wavelength to pass through. Therefore, whether the optical signal is received or not can be judged, whether the optical signal passes through the corresponding single-wave optical filter or not can be judged, whether the wavelength of each path of output light is the same as that of the corresponding sub-input light can be further judged, and whether the polarity of the corresponding channel in the product to be tested is correct or not is further judged through the consistency of the wavelengths of the sub-input light and the output light, namely, the routing relation between the input end and the output end of the channel is correct. And finally, whether the polarity of the channel corresponding to the output light of the corresponding path in the product to be tested is correct can be judged.
In the polarity testing method of the embodiment, the main input light with the composite wavelength is provided, and the main input light is subjected to wave splitting to form a plurality of paths of sub input light with different wavelengths; respectively butting input light of multiple paths of sub-circuits to the input end of a product to be tested; the multi-path output light output by the output ends of the product to be tested is received through the single-wave light filters in a one-to-one correspondence mode, and whether the output light of each path can penetrate through the corresponding single-wave light filter can be judged only by detecting whether the output interface end of the single-wave light filter can receive the light signal, so that whether the polarity of a channel corresponding to the output light of the path in the product to be tested is correct or not is judged, and the method is simple and visual. The polarity of each channel in a product to be tested with multiple channels is tested simultaneously through the wave division and the optical filters arranged correspondingly, the process is simple, and the energy consumption is reduced by using the composite light source.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a polarity testing apparatus based on wavelength division multiplexing according to a first embodiment of the present disclosure.
In the present embodiment, the polarity testing apparatus 30 includes a light source input portion 31 and a detecting portion 32, wherein the light source input portion 31 and the detecting portion 32 are connected to a product 33 to be tested. The light source input portion 31 provides multi-path sub input light corresponding to a channel in the product 33 to be tested for the product 33 to be tested, the multi-path sub input light is correspondingly connected to a corresponding channel of the product to be tested and is output as multi-path output light, the output light is connected to the detection portion 32, and the detection portion 32 tests each path of output light to judge whether the polarity of the channel of the product 33 to be tested corresponding to each path of output light is correct.
Specifically, the light source input section 31 includes a splitter 311, and the splitter 311 splits the main input light having a composite wavelength into a plurality of different wavelengthsSub-input light, e.g. n sub-input light, each having a wavelength λ 1 、λ 1 …λ n-1 、λ n . The demultiplexer 311 is connected to a plurality of optical fibers 34 to transmit the plurality of sub-input light beams with different wavelengths to the product 33 to be tested through the plurality of optical fibers 34.
The product 33 to be tested may be an optical transmission product requiring polarity detection, such as an optical fiber patch cord, an optical fiber backplane, and an optical router.
The detection section 32 includes an optical filter 321 and an optical signal receiver 322. The filter 321 includes a plurality of single-wave filters 3211, and receives the multiple paths of output light output from the multiple output ends of the product 33 to be tested in a one-to-one correspondence manner through the plurality of single-wave filters 3211. The optical signal receiver 322 is connected to the optical filter 321 to detect whether the output light of each path can pass through the corresponding single-wave optical filter 3211.
Further, the light source input portion 31 further includes a broadband light source 312, and the broadband light source 312 is connected to the demultiplexer 311 and supplies main input light of a composite wavelength to the demultiplexer 311. In particular, broadband light source 312 includes a composite optical output port (not shown) to output main input light at a composite wavelength over a wide range of wavelength bands. The broadband light source 312 provides a wide range of wavelength light sources, which can reduce the number of detection light sources and reduce the energy consumption for polarity test.
The broadband light source 312, the wave splitter 311, the product 33 to be tested, the optical filter 321 and the optical signal receiver 322 are all connected through an optical fiber 34, and further connected with the optical fiber coupling interfaces on the broadband light source 312, the wave splitter 311, the product 33 to be tested, the optical filter 321 and the optical signal receiver 322 through an optical fiber coupling joint (not shown) of the optical fiber 34, so as to realize that the input light emitted by the broadband light source 312 is connected to the wave splitter 311 through the optical fiber 34, the multi-path sub input light separated by the wave splitter 311 is connected to the product 33 to be tested through the optical fiber 34, the multi-path single wavelength sub input light is correspondingly connected to the input ends of a plurality of channels of the product 33 to be tested, and the output light at the output end of the corresponding channel is connected to the corresponding single wave filter 3211 in the optical filter 321 through the optical fiber 34, the optical filter 321 is connected with the optical signal receiver 322 through the optical fiber 34, so as to detect whether there is an optical signal through the optical signal receiver 322, and further determine whether the output light of the corresponding channel can pass through the corresponding single-wave filter 3211, so as to determine whether the polarity of the corresponding channel in the product 33 to be tested is correct.
In an embodiment, the number of the optical signal receivers 322 is multiple, and the multiple optical signal receivers 322 are respectively disposed in one-to-one correspondence with the multiple single-wavelength optical filters 3211, so as to test and determine the polarities of all the channels of the product 33 to be tested at the same time. In other embodiments, the number of the optical signal receivers 322 may be one, and the optical signal receivers are connected to the single wavelength filters 3211 one by one, so as to determine whether there is an optical signal at the output end of each single wavelength filter 3211 one by one, so as to implement polarity test determination on each channel of the product 33 to be tested one by one.
In this embodiment, in the polarity testing apparatus 30, through different combinations and transformations of the splitter 311 and the plurality of single-wave filters 3211, the different wavelength combinations realize the transformation of richer channel detection numbers, and the polarity testing can be performed on different channel combinations supporting different wavelength combinations and wavelength ranges, so as to adapt to different products to be tested 33, and realize the polarity testing on different products to be tested 33.
The polarity testing device 30 of this embodiment provides main input light with composite wavelength in a wide range through the broadband light source 312, and the wave splitter 311 splits the main input light to form multiple paths of sub input light with different wavelengths; the input light of the plurality of paths is respectively butted with the input end of the product to be tested 33; the light signal receiver 322 detects whether each path of output light can pass through the corresponding single-wave filter 3211, and thus, whether the polarity of the channel corresponding to one path of output light in the product 33 to be tested is correct can be simply and visually determined. The polarity of each channel in the product to be tested 33 with multiple channels is tested simultaneously through the wave division and the corresponding optical filter, the process is simple, and the energy consumption is reduced by using the composite light source.
The above description is only an example of the present application, and is not intended to limit the scope of the present application, and all equivalent structures or equivalent processes performed by the present application and the contents of the attached drawings, which are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.
Claims (10)
1. A polarity testing method based on wavelength division multiplexing is characterized by comprising the following steps:
providing primary input light of a composite wavelength;
the main input light is subjected to wave splitting to form a plurality of paths of sub input light with different wavelengths;
respectively butting multiple paths of the sub input light with the input end of a product to be tested;
receiving multi-path output light output by a plurality of output ends of the product to be tested in a one-to-one correspondence mode through a plurality of single-wave filters;
and judging whether the polarity of a channel corresponding to the output light of the corresponding path in the product to be tested is correct or not by detecting whether the output light of each path can pass through the corresponding single-wave optical filter or not.
2. The polarity testing method according to claim 1, wherein the step of determining whether the channel polarity corresponding to the output light of the corresponding path in the product to be tested is correct by detecting whether the output light of each path can pass through the corresponding single-wave filter includes:
if the output light of the first path can pass through the corresponding single-wave optical filter, the polarity of a channel corresponding to the output light of the first path in the product to be tested is correct;
and if the output light of the second path cannot pass through the corresponding single-wave filter, the polarity of a channel corresponding to the output light of the second path in the product to be tested is incorrect.
3. The polarity test method according to claim 1, wherein the step of detecting whether the output light of each path can pass through the corresponding single wave filter comprises:
detecting an optical signal at an output interface end of the single-wave optical filter;
and judging whether the output light of each path can pass through the corresponding single-wave optical filter or not by detecting whether the optical signal can be received or not.
4. The polarity testing method according to claim 3, wherein the step of determining whether the output light of each path can pass through the corresponding single-wave filter by detecting whether an optical signal can be received comprises:
if the output interface end of the single-wave optical filter corresponding to the first path of the output light detects an optical signal, the first path of the output light can pass through the corresponding single-wave optical filter;
and if the output interface end of the single-wave optical filter corresponding to the second path of the output light does not detect an optical signal, the second path of the output light cannot pass through the corresponding single-wave optical filter.
5. The polarity testing method according to claim 1, wherein the number of the plurality of single wave filters is the same as the number of the paths of the plurality of sub input light.
6. The polarity test method according to claim 1, wherein the plurality of single wave filters correspond to a plurality of paths of the sub-input light with different wavelengths one by one, so that the plurality of paths of the sub-input light with different wavelengths before being butted with the input end of the product to be tested can correspondingly pass through the plurality of single wave filters.
7. The polarity testing device based on wavelength division multiplexing is characterized by comprising a light source input part and a detection part, wherein the light source input part and the detection part are both connected with a product to be tested;
wherein the light source input part includes:
the wave separator is connected with the input end of the product to be tested; the wave separator separates the main input light with the composite wavelength to form a plurality of paths of sub input light with different wavelengths;
the detection section includes:
the optical filter comprises a plurality of single-wavelength optical filters and receives the multi-path output light output by the output ends of the product to be tested in a one-to-one correspondence manner through the single-wavelength optical filters;
and the optical signal receiver is connected with the optical filters to detect whether the output light of each path can pass through the corresponding single-wave optical filter.
8. The polarity testing device according to claim 7, wherein a plurality of said optical signal receivers are disposed in one-to-one correspondence with said single wavelength filters.
9. The polarity test apparatus of claim 7, wherein the light source input further comprises a broadband light source coupled to the splitter to provide primary input light of a composite wavelength to the splitter.
10. The polarity testing apparatus of claim 9, wherein the broadband light source, the wave splitter, the optical filter, and the optical signal receiver have fiber coupling interfaces, so as to connect the broadband light source and the wave splitter via optical fibers, connect the wave splitter and the product to be tested, connect the product to be tested and the optical filter, and connect the optical filter and the optical signal receiver.
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