CN114915335B - Polarity test method and device based on wavelength division multiplexing - Google Patents
Polarity test method and device based on wavelength division multiplexing Download PDFInfo
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- 239000002131 composite material Substances 0.000 claims abstract description 31
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
Abstract
The application discloses a polarity test method and device based on wavelength division multiplexing. According to the polarity test method, the main input light with the composite wavelength is provided, and is subjected to wave division to form multiple paths of sub-input light with different wavelengths; respectively butt-jointing the multiple paths of sub-input light to the input ends of the products to be tested; the multipath output light output by the multiple output ends of the product to be tested is received through the multiple single-wave filters in one-to-one correspondence, and 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 simply and intuitively judged by detecting whether the output light of each path can pass through the corresponding single-wave filter. The polarity of each channel in the product to be tested with multiple channels is tested simultaneously through the wave splitting and the corresponding optical filters, the process is simple, the composite light source is used, and the energy consumption is reduced.
Description
Technical Field
The present application relates to the field of optical transmission detection, and in particular, to a polarity test method and apparatus based on wavelength division multiplexing.
Background
The polarity is also called as a route line sequence, and represents the transmission corresponding relation from the A end to the B end during multi-channel transmission. The polarity test is a method for detecting the optical fiber routing relationship, and can accurately judge whether the routing relationship of the product accords with the design of the product or not through the polarity test, so that the method is an indispensable procedure in the production process of the multipath optical fiber product.
The traditional polarity test method is that a plurality of luminous sources are used for corresponding to each channel of a product to be tested, when in test, all the luminous sources emit light, then the other end of the product is received and judged by using the same receiving devices, or in a way of sequentially emitting light, after the first channel is correct, the second channel is excited to emit light, and then judgment is performed sequentially. However, the polarity test method is complicated in process and high in energy consumption.
Disclosure of Invention
The application provides a polarity test method and device based on wavelength division multiplexing, which are used for solving the problems of complex process and high energy consumption of a multichannel polarity test.
In order to solve the technical problems, the application adopts a technical scheme that: provided is a polarity test method based on wavelength division multiplexing, the polarity test method comprising: providing primary input light of a composite wavelength; the main input light is subjected to wave division to form multiple paths of sub-input light with different wavelengths; respectively butt-jointing the multiple paths of sub-input light to the input ends of the products to be tested; receiving multipath output light output by a plurality of output ends of the product to be tested through a plurality of single-wave filters in a one-to-one correspondence manner; 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 by detecting whether the output light of each path can pass through the corresponding single-wave filter.
Further, 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 comprises the following steps: if the first path of the output light passes 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; if the second path of output light cannot pass through the corresponding single-wave optical filter, the polarity of the channel corresponding to the second path of output light 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 connected to the corresponding access port of the single-wave filter; detecting optical signals at the output interface end of the single-wave filter; 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.
Further, the step of determining whether the output light of each path can pass through the corresponding single-wave filter by detecting whether the optical signal can be received, includes: if the output interface end of the single-wave filter corresponding to the first path of output light detects an optical signal, the first path of output light can pass through the corresponding single-wave filter; if the output interface end of the single-wave filter corresponding to the second path of output light does not detect the optical signal, the second path of output light cannot pass through the corresponding single-wave filter.
Further, the number of the plurality of single-wave filters is the same as the number of the paths of the plurality of paths of the sub-input light.
Further, the plurality of single-wave filters are in one-to-one correspondence with the plurality of paths of sub-input light with different wavelengths, so that the plurality of paths of sub-input light with different wavelengths before the input end of the product to be tested can correspondingly pass through the plurality of single-wave filters.
In order to solve the technical problems, the application adopts another technical scheme that: a polarity test device based on wavelength division multiplexing is provided. The polarity test device based on wavelength division multiplexing comprises: the light source input part and the detection part are connected with the product to be tested; wherein the light source input section includes: the splitter splits the main input light with the composite wavelength to form multiple paths of sub input light with different wavelengths; the detection unit includes: the optical filter comprises a plurality of single-wavelength optical filters, and multipath output light output by a plurality of output ends of the product to be tested is received through the single-wavelength optical filters in a one-to-one correspondence manner; 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.
Further, the plurality of optical signal receivers are arranged in one-to-one correspondence with the single wavelength filters.
Further, the light source input part further comprises a broadband light source, and the broadband light source is connected with the demultiplexer and provides main input light with composite wavelength for the demultiplexer.
Further, the broadband light source, the demultiplexer, the optical filter and the optical signal receiver are all provided with optical fiber coupling interfaces, so that the broadband light source and the demultiplexer are connected through optical fibers, the demultiplexer is connected with a product to be tested, the product to be tested is connected with the optical filter, and the optical filter is connected with the optical signal receiver.
The beneficial effects of the application are as follows: different from the prior art, the application provides a polarity test method based on wavelength division multiplexing, which is characterized in that the main input light with composite wavelength is provided to be subjected to wave division to form multiple sub-input light with different wavelengths; respectively butt-jointing the multiple paths of sub-input light to the input ends of the products to be tested; the multipath output light output by the multiple output ends of the product to be tested is received through the multiple single-wave filters in one-to-one correspondence, and 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 simply and intuitively judged by detecting whether the output light of each path can pass through the corresponding single-wave filter. The polarity of each channel in the product to be tested with multiple channels is tested simultaneously through the wave splitting and the corresponding optical filters, the process is simple, the composite light source is used, and the energy consumption is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings used in the description of the embodiments and the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow chart of a first embodiment of a polarity test method based on wavelength division multiplexing according to the present application;
fig. 2 is a schematic flow chart of a second embodiment of a polarity test method based on wavelength division multiplexing according to the present application;
fig. 3 is a schematic structural diagram of a first embodiment of a polarity test device based on wavelength division multiplexing according to the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The terms "first," "second," "third," and the like in this disclosure are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", and "a third" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise. All directional indications (such as up, down, left, right, front, back … …) in embodiments of the present application are merely used to explain the relative positional relationship, movement, etc. between the components in a particular gesture (as shown in the drawings), and if the particular gesture changes, the directional indication changes accordingly. Furthermore, the terms "comprise" 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 listed steps or elements but may include other steps or elements not 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 may be included in at least one embodiment of the application. The appearances of such phrases 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. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments without conflict. The following will each explain in detail by means of specific examples.
The embodiment of the application provides a polarity test method and device based on wavelength division multiplexing, which are used for solving the problems of complex procedures and high energy consumption of the conventional polarity test method. The wavelength division multiplexing (WDM, wavelength Division Multiplexing) is to combine a series of optical carrier signals with different wavelengths carrying various information together at a transmitting end through a Multiplexer (Multiplexer) and couple the signals into the same optical fiber for transmission, and separate the optical signals with various wavelengths at a receiving end through a Demultiplexer (Demultiplexer). The application separates the composite light wave into a plurality of single wavelength light signals based on wavelength division multiplexing so as to correspond to a plurality of channels in the product to be tested, and simultaneously tests the polarity of each channel in the product to be tested with multiple channels through the corresponding optical filters, so that the process is simple, and the energy consumption is reduced by using the composite light source. The present application will be described in detail with reference to the drawings, and is specifically as follows:
referring to fig. 1, fig. 1 is a schematic flow chart of a first embodiment of a polarity test method based on wavelength division multiplexing according to the present application, which specifically includes:
s101: providing primary input light of a composite wavelength.
In this embodiment, a main input light with a composite wavelength is provided, and a light source is provided for the demultiplexing process in step S102. The primary input light is of a composite wavelength, that is, the primary input light comprises a wide range of frequency bands or frequencies. Wherein, the conversion relation between wavelength and frequency is: λ=v/f, where f represents a frequency, and denotes the number of times periodic variation is completed per unit time, which is an amount describing the degree of frequency of periodic movement; lambda denotes the wavelength, which refers to the distance the wave propagates in one vibration cycle. In a specific embodiment, a broadband light source or a composite light source may be used to provide this primary input light. Further, the broadband light source comprises a composite light output port, and the output end outputs composite waves with a wide wavelength band.
S102: the main input light is split to form multiple sub-input light with different wavelengths.
In this embodiment, the main input light is an optical signal with a composite wavelength, and it is necessary to split the optical signal into multiple sub-input lights with different wavelengths. The separation of multiple sub-input light of different wavelengths can also be said to be the separation of multiple channels, each channel being a single wavelength sub-input light. The separated sub-input light of the multiple channels can meet the requirement of polarity testing of each channel in the multi-channel product to be tested.
In some embodiments, the demultiplexing may be performed by a demultiplexer or a demultiplexer. The wave splitters have different types, the wave splitters of different types can carry out wave splitting processing on light in different frequency ranges or wave band ranges, and the paths of multiple paths of different wavelengths separated by the wave splitters of different types can be different, or the wavelengths of the separated single waves are different. The multiple single waves of the demultiplexer are used for testing the polarity of each channel in the product to be tested, so that the model of the demultiplexer needs to be selected according to the product to be tested. Or, the number of paths of the sub-input light to be split and the single wavelength of the sub-input light need to be selected according to the channels in the product to be tested. It can be understood that the sub-input light with multiple paths of different wavelengths includes at least 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 multiple paths of sub-input light with the input ends of the products to be tested.
And respectively butting the multiple paths of sub-input light with the input ends of the products to be tested so as to provide the single-wave optical signals corresponding to each path of the products to be tested. Specifically, the input end of the product to be tested comprises a plurality of interfaces corresponding to the channels, and each path of single-wave sub-input optical signal in the multi-path sub-input light is in butt joint with the interface of the corresponding channel so as to input the single-wave sub-input light corresponding to each path of channel into the product to be tested.
S104: and receiving multipath output light output by a plurality of output ends of the product to be tested through a plurality of single-wave filters in one-to-one correspondence.
After the sub-input lights with different wavelengths are correspondingly connected with the corresponding channels of the product to be tested, the corresponding output ends of the channels are connected with the corresponding single-wave optical filters, namely, the output light of each channel is connected with the access end of the corresponding single-wave optical filter. The single-wave filters are in one-to-one correspondence with the multiple paths of sub-input light with different wavelengths, so that the multiple paths of sub-input light with different wavelengths in front of the input end of the product to be tested can correspondingly pass through the multiple single-wave filters. That is, when the polarity test is performed on the product to be tested, the plurality of single-wave filters are in one-to-one correspondence to receive the multiple paths of output light output by the plurality of output ends of the product to be tested, so that the filtering process can be performed on each path of output light. However, the single-wave filters may be arranged in correspondence with the multiple sub-input lights. In a specific embodiment, the number of paths of the sub-input light which is split is more than the number of paths of the product to be tested, but the sub-input light which is connected into the product to be tested is in one-to-one correspondence with the paths of the product to be tested. Even if the plurality of single wave filters are in one-to-one correspondence with the sub-input light, the number of the single wave filters is more than the number of the channels of the product to be tested, but the number and the model of the single wave filters correspondingly connected with the output end of the product to be tested need to be in one-to-one correspondence with the channels of the product to be tested.
The optical filter is an optical device for selecting a wavelength band to be radiated, and can selectively allow light with a specific wavelength to pass or allow light with a specific range of wavelengths to pass, and can also selectively cut off a specific wavelength. Whereas a single-wave filter is only capable of allowing light of a specific single wavelength to pass.
After the output end of the product to be tested is correspondingly connected with a plurality of single-wave filters, step S105 is performed.
S105: 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 by detecting whether the output light of each path can pass through the corresponding single-wave filter.
Specifically, if the first path of output light passes through the corresponding single-wave optical filter, the polarity of the channel corresponding to the first path of output light in the product to be tested is correct; 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, respectively. And is connected with eachThe corresponding wavelengths of the channels are lambda respectively 1 、λ 2 、λ 3 . Providing main input light with composite wavelength, dividing the main input light to form 3 paths of sub-input light with different wavelengths, wherein the wavelengths are lambda respectively 1 、λ 2 、λ 3 . In this embodiment, the number of sub-input light paths formed by the branching is the same as the number of channels of the product to be tested. And 3, respectively connecting the sub-input light with the input ends of the products to be tested, namely respectively connecting the input ends of the channel 1, the channel 2 and the channel 3. 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 the paths of the multi-path sub-input light. In which the single-wave filter 1 can only allow the wavelength lambda 1 The single-wave filter 2 allows only the wavelength lambda to pass 2 The single-wave filter 3 allows only the wavelength lambda to pass 3 Is passed through by the light of (a). The single wave filters are in one-to-one correspondence to receive the multipath output light output by the multiple output ends of the product to be tested, and whether the polarities of the channels corresponding to the output light of the corresponding path in the product to be tested are correct is judged by detecting whether the output light of each path can pass through the corresponding single wave filter. For example, wavelength lambda 1 The sub-input light of the product to be tested is input to the input end of the channel 1, the output end of the channel 1 outputs corresponding output light, the output light is connected into the single-wave filter 1, and whether the polarity of the channel 1 is correct can be judged by judging whether the output light of the channel 1 can pass through the single-wave filter 1. If the output light energy of the channel 1 passes through the single-wave 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 polarity of the channel 1 in the product to be tested 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 lambda 1 The output light of (2) is passed through the single wave filter 1. If the polarity of the channel 1 is incorrect, the wavelength of the output light obtained after the sub-input light passes through the channel 1 is not lambda 1 Whereas the single-wave filter 1 is capable of allowing only the wavelength lambda 1 And thus, not lambda 1 The output light of the wavelength cannot pass through the single waveA filter 1. Therefore, in this embodiment, whether the polarity of the channel corresponding to the output light of the corresponding path in the product to be tested is correct is determined by detecting whether the output light of each path can pass through the corresponding single-wave filter, which is practical, simple and convenient. All channels in the product to be tested, including the channel 2 and the channel 3, are judged in the same way so as to realize the test of the polarities of all the channels, and whether the polarities of the whole product to be tested are correct is judged.
According to the polarity test method, the main input light with the composite wavelength is provided, and is subjected to wave division to form multiple paths of sub-input light with different wavelengths; respectively butt-jointing the multiple paths of sub-input light to the input ends of the products to be tested; the multipath output light output by the multiple output ends of the product to be tested is received through the multiple single-wave filters in one-to-one correspondence, and 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 simply and intuitively judged by detecting whether the output light of each path can pass through the corresponding single-wave filter. The polarity of each channel in the product to be tested with multiple channels is tested simultaneously through the wave splitting and the corresponding optical filters, the process is simple, the composite light source is used, and the energy consumption is reduced.
Referring to fig. 2, fig. 2 is a flow chart of a second embodiment of a polarity test method based on wavelength division multiplexing according to the present application, which specifically includes:
s201: providing primary input light of a composite wavelength.
S202: the main input light is split to form multiple sub-input light with different wavelengths.
S203: and respectively butting the multiple paths of sub-input light with the input ends of the products to be tested.
S204: and receiving multipath output light output by a plurality of output ends of the product to be tested through a plurality of single-wave filters in one-to-one correspondence.
The specific implementation process of steps S201 to S204 may refer to the implementation process of steps S101 to S104 in the first embodiment, and will not be described herein.
After receiving the multiple output lights output from the multiple output ends of the product to be tested by using the multiple single-wave filters in a one-to-one correspondence manner in the steps S201-S204, that is, after the output lights of each path are connected to the connection ends of the corresponding single-wave filters, step S205 is executed.
S205: and detecting optical signals at the output interface end of the single-wave filter.
And (2) respectively accessing multiple paths of output light of a plurality of channels of the product to be tested into corresponding single-wave optical filters in a one-to-one correspondence manner, carrying out corresponding filtering treatment on each path of output light through the single-wave optical filters, and then carrying out optical signal detection at an output interface end of the single-wave optical filters so as to judge in step S206.
S206: 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 so as to judge 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 optical signal can be received at the output end of the corresponding single-wave filter, whether the output light of each path can pass through the corresponding single-wave filter can be judged. Specifically, if an output interface end of a single-wave filter corresponding to the first path of output light detects an optical signal, the first path of output light can pass through the corresponding single-wave filter; however, if the output interface end of the single-wave filter corresponding to the second path of output light does not detect the optical signal, it indicates that the second path of output light cannot pass through the corresponding single-wave filter. This is based on the single wave filter allowing only light of a specific wavelength to pass. Therefore, by judging whether the optical signals are received or not, whether the optical signals pass 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 the wavelength of the corresponding sub-input light or not can be further judged, and the polarity of the corresponding channel in the product to be tested is judged to be correct through the consistency of the wavelengths of the sub-input light and the output light, namely, the routing relationship between the input end and the output end of the channel is correct. Finally, 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 can be judged.
According to the polarity test method, the main input light with the composite wavelength is provided, and is subjected to wave division to form multiple paths of sub-input light with different wavelengths; respectively butt-jointing the multiple paths of sub-input light to the input ends of the products to be tested; the multipath output light output by the multiple output ends of the product to be tested is received through the multiple single-wave filters in one-to-one correspondence, and whether the output light of each path can pass through the corresponding single-wave filter can be judged only by detecting whether the output interface end of the single-wave filter can receive the light signal, so that whether the polarity of the channel corresponding to the output light of the corresponding path in the product to be tested is correct is judged, and the method is simple and visual. The polarity of each channel in the product to be tested with multiple channels is tested simultaneously through the wave splitting and the corresponding optical filters, the process is simple, the composite light source is used, and the energy consumption is reduced.
The application provides a polarity testing device based on wavelength division multiplexing, referring to fig. 3, fig. 3 is a schematic structural diagram of a first embodiment of the polarity testing device based on wavelength division multiplexing.
In the present embodiment, the polarity test device 30 includes a light source input portion 31 and a detection portion 32, wherein the light source input portion 31 and the detection portion 32 are both connected to a product 33 to be tested. The light source input part 31 provides multiple paths of sub-input light corresponding to the channels in the product 33 to be tested for the product 33 to be tested, the multiple paths of sub-input light are correspondingly connected into the corresponding channels of the product to be tested and output into multiple paths of output light, the output light is connected into the detection part 32, and the detection part 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 part 31 includes a demultiplexer 311, and the demultiplexer 311 demultiplexes the main input light with a composite wavelength to form multiple sub-input light with different wavelengths, such as n sub-input light, each with a wavelength of λ 1 、λ 1 …λ n-1 、λ n . The demultiplexer 311 is connected to the plurality of optical fibers 34 to transmit the multiple sub-input lights 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 that needs polarity detection, such as an optical fiber jumper, an optical fiber backboard, and an optical router.
The detection section 32 includes an optical filter 321 and an optical signal receiver 322. The optical filter 321 includes a plurality of single-wave optical filters 3211, and receives multiple output lights output by a plurality of output ends of the product 33 to be tested through the single-wave optical filters 3211 in a one-to-one correspondence manner. 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.
The light source input unit 31 further includes a broadband light source 312, and the broadband light source 312 is connected to the demultiplexer 311 to supply the main input light of the composite wavelength to the demultiplexer 311. Specifically, broadband light source 312 includes a composite light output port (not shown) to output primary input light of composite wavelengths over a wide range of wavelength bands. The wide range of wavelength sources provided by broadband light source 312 may reduce the number of detection sources and reduce the power consumption of the polarity test.
The broadband light source 312, the demultiplexer 311, the product 33 to be tested, the optical filter 321 and the optical signal receiver 322 are all connected through the optical fiber 34, further, the broadband light source 312, the demultiplexer 311, the product 33 to be tested, the optical filter 321 and the optical fiber coupling interface on the optical signal receiver 322 are connected through the optical fiber coupling joint (not shown) of the optical fiber 34, so that the input light emitted by the broadband light source 312 is connected to the demultiplexer 311 through the optical fiber 34, the multiple paths of sub-input light separated by the demultiplexer 311 is connected to the product 33 to be tested through the optical fiber 34, the multiple paths of single-wavelength sub-input light are correspondingly connected to the input ends of multiple channels of the product 33 to be tested, the output light at the output ends of the corresponding channels is connected to the corresponding single-wave optical filter 3211 in the optical filter 321 through the optical fiber 34, the optical filter 321 is connected to the optical signal receiver 322 through the optical fiber 34, and whether the optical signal is detected through the optical signal receiver 322, and whether the output light of the corresponding channel can pass through the corresponding single-wave optical filter 3211 is judged, so that whether the polarity of the corresponding channel in the product 33 to be tested is correct is judged.
In a specific embodiment, the number of the optical signal receivers 322 is multiple, and the multiple optical signal receivers 322 are respectively arranged in one-to-one correspondence with the multiple single wavelength filters 3211, so as to perform test and judgment on the polarities of all channels of the product 33 to be tested at the same time. In other embodiments, the optical signal receiver 322 may be one, and is connected to the single wavelength filters 3211 one by one to determine whether the output end of each single wavelength filter 3211 has an optical signal, so as to perform polarity test determination on each channel of the product 33 to be tested one by one.
In this embodiment, the polarity test device 30 realizes the conversion of a richer channel detection number by different combinations and conversions of the demultiplexer 311 and the plurality of single-wave filters 3211, and the different wavelength combinations can perform polarity detection on different channel combinations supporting different wavelength combinations and wavelength ranges so as to adapt to different products 33 to be tested, thereby realizing the polarity test on different products 33 to be tested.
The polarity test device 30 of the present embodiment splits the main input light by the splitter 311 through the wide range of main input light provided by the broadband light source 312 and providing the composite wavelength, so as to form multiple sub-input light with different wavelengths; respectively butt-jointing the multiple paths of sub-input light to the input ends of the product 33 to be tested; the multipath output light output by the multiple output ends of the product 33 to be tested is received through the multiple single-wave filters 3211 in the optical filter 321 in a one-to-one correspondence manner, and whether the polarity of a channel corresponding to the output light of the corresponding path in the product 33 to be tested is correct can be simply and intuitively judged by detecting whether the output light of each path can pass through the corresponding single-wave filter 3211 through the optical signal receiver 322. The polarity of each channel in the product 33 to be tested with multiple channels is tested simultaneously through the wave splitting and the corresponding optical filters, the process is simple, and the energy consumption is reduced by using the composite light source.
The foregoing description is only illustrative of the present application and is not intended to limit the scope of the application, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present application.
Claims (10)
1. A polarity test method based on wavelength division multiplexing, the method comprising:
providing primary input light of a composite wavelength;
the main input light is subjected to wave division to form multiple paths of sub-input light with different wavelengths;
respectively butt-jointing the multiple paths of sub-input light to the input ends of the products to be tested;
receiving multipath output light output by a plurality of output ends of the product to be tested through a plurality of single-wave filters in a one-to-one correspondence manner;
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 by detecting whether the output light of each path can pass through the corresponding single-wave filter.
2. The 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 comprises:
if the first path of the output light passes 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;
if the second path of output light cannot pass through the corresponding single-wave optical filter, the polarity of the channel corresponding to the second path of output light in the product to be tested is incorrect.
3. The 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 optical signals at the output interface end of the single-wave filter;
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.
4. A polarity test 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 filter corresponding to the first path of output light detects an optical signal, the first path of output light can pass through the corresponding single-wave filter;
if the output interface end of the single-wave filter corresponding to the second path of output light does not detect the optical signal, the second path of output light cannot pass through the corresponding single-wave filter.
5. The polarity test method according to claim 1, wherein the number of the plurality of single-wave filters is the same as the number of the plurality of sub-input lights.
6. The method according to claim 1, wherein the single-wave filters are in one-to-one correspondence with the multiple paths of the sub-input light with different wavelengths, so that the multiple paths of the sub-input light with different wavelengths before the input end of the product to be tested is abutted can pass through the single-wave filters correspondingly.
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 connected with a product to be tested;
wherein the light source input section includes:
the wave separator is connected with the input end of the product to be tested; the splitter splits the main input light with the composite wavelength to form multiple paths of sub input light with different wavelengths;
the detection unit includes:
the optical filter comprises a plurality of single-wavelength optical filters, and multipath output light output by a plurality of output ends of the product to be tested is received through the single-wavelength optical filters in a one-to-one correspondence manner;
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 test device of claim 7, wherein a plurality of the optical signal receivers are disposed in one-to-one correspondence with the single wavelength filters.
9. The polarity test device of claim 7, wherein the light source input further comprises a broadband light source coupled to the demultiplexer to provide the main input light of the composite wavelength to the demultiplexer.
10. The polarity test device of claim 9, wherein the broadband light source, the demultiplexer, the optical filter, and the optical signal receiver each have an optical fiber coupling interface thereon to connect the broadband light source and the demultiplexer, the demultiplexer and the product under test, the product under test and the optical filter, and the optical signal receiver via optical fibers.
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