CN115426047A - Light splitting terminal, networking structure, PON network monitoring system and method - Google Patents

Light splitting terminal, networking structure, PON network monitoring system and method Download PDF

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Publication number
CN115426047A
CN115426047A CN202210929892.8A CN202210929892A CN115426047A CN 115426047 A CN115426047 A CN 115426047A CN 202210929892 A CN202210929892 A CN 202210929892A CN 115426047 A CN115426047 A CN 115426047A
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optical
optical fiber
output
terminal
code
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朱惠君
薛鹏
毛志松
邬耀华
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Zhongshan Shuimu Guanghua Electronic Information Technology Co ltd
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Zhongshan Shuimu Guanghua Electronic Information Technology Co ltd
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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
    • H04B10/27—Arrangements for networking
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Computing Systems (AREA)
  • Electromagnetism (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)

Abstract

A light splitting terminal, a networking structure, a PON network monitoring system and a PON network monitoring method are provided. The first optical fiber code is connected in front of the optical splitter, so that the optical splitter is identified by the first optical fiber code; the optical splitter is connected with a second optical fiber code respectively at each optical splitting branch, so that each second optical fiber code is utilized to realize the identification of each branch; meanwhile, the second optical fiber code on each branch adopts different code elements for coding, so that each branch is distinguished, and the unique identification of the branch in the PON network is realized. The networking structure of the light splitting terminal group can comprise a plurality of light splitting terminals so as to form a multi-stage light splitting terminal, and because attenuation accumulation exists in the networking structure, stable identification of branches is realized by adjusting the reflectivity of a plurality of second optical fiber codes in the multi-stage light splitting terminal.

Description

Light splitting terminal, networking structure, PON network monitoring system and method
Technical Field
The invention relates to the field of optical fiber communication, in particular to a light splitting terminal, a networking structure, a PON monitoring system and a PON monitoring method.
Background
The existing Passive Optical Network (PON) adopts optical splitter cascade, which solves the communication of one to multiple stations, but has the following problems. Because each level of the multi-level optical splitter has different attenuation and the excessive attenuation affects the reflection energy of the optical fiber codes, part of the optical fiber codes cannot be collected under the consistent light intensity of the monitoring station; the reflectivity of the optical fiber codes of the front and the rear stages of the multi-stage optical splitter can influence the collection of the same wavelength, and the same wavelength can be reflected and shielded. After the optical waves are branched and processed by the optical splitter, the branched optical waves return simultaneously in the time domain, so that the optical fiber code cannot be identified. Optical Time Domain Reflectometry (OTDR) has no way to achieve unique and stable identification of the optical paths of the splitter branches, nor to achieve independent measurement and inspection of each branch.
Therefore, these problems seriously affect the application of optical fiber coding in the PON network, and affect the identification, management and operation of the PON network.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a light splitting terminal, which solves the problem that identification and management of a PON network are influenced because optical fiber codes are difficult to identify in the current PON network.
The invention also provides a light splitting terminal networking, a PON network monitoring system and a PON network monitoring method.
The optical splitting terminal according to the embodiment of the first aspect of the invention comprises:
a first fiber encoding;
the optical splitter comprises a first input end and a plurality of first output ends, and the first input end is connected with the output end of the first optical fiber code;
and the input ends of the second optical fiber codes are respectively connected with the first output ends in a one-to-one correspondence mode, and the codes of the second optical fiber codes are different.
The light splitting terminal provided by the embodiment of the invention at least has the following beneficial effects:
the first optical fiber code is connected in front of the optical splitter, so that the optical splitter is identified by the first optical fiber code; the optical splitter is connected with a second optical fiber code respectively at each optical splitting branch, so that each second optical fiber code is utilized to realize the identification of each branch; meanwhile, the second optical fiber code on each branch adopts different code elements for coding, so that each branch is distinguished, and the unique identification of the branch in the PON network is realized.
According to some embodiments of the invention, each of the second fiber codes is different from a spatial distance between the optical splitter.
The optical splitting terminal networking according to the second aspect of the present invention includes an optical splitting terminal according to the first aspect of the present invention.
The optical splitting terminal networking according to the third aspect of the present invention includes a plurality of optical splitting terminals according to the first aspect of the present invention, and the plurality of optical splitting terminals are connected in sequence.
The networking of the light splitting terminal according to the embodiment of the invention has at least the following beneficial effects:
the networking structure of one light splitting terminal is adopted to realize the identification of each path of the small PON network; for a networking structure adopting a plurality of light splitting terminals, the input end of one light splitting terminal is connected with one output end of the other light splitting terminal to form a second-level light splitting terminal, so that a plurality of light splitting terminals can be utilized to form a multi-level light splitting terminal. The networking formed by the multi-stage light splitting terminals can realize multi-branch identification in the network, thereby being beneficial to being applied to a large PON network for identification. For the multi-stage light splitting terminal connected in series, attenuation accumulation exists, so that stable identification of branches can be realized by adjusting the reflectivity of a plurality of second optical fiber codes.
According to some embodiments of the present invention, the optical splitter of a first optical splitting terminal among a plurality of sequentially connected optical splitting terminals has a plurality of first output ends and outputs optical wave energy equally divided, the optical splitters of each remaining optical splitting terminal have two first output ends and outputs optical wave energy unequally divided, the output optical wave energy of one first output end of the optical splitter of each remaining optical splitting terminal is greater than the output optical wave energy of another first output end, and the reflectivity of the second optical fiber code connected to the one first output end is less than the reflectivity of the second optical fiber code connected to the another first output end.
According to some embodiments of the invention, the optical splitter of each of a plurality of said optical splitting terminals connected in series has a plurality of said first outputs and outputs an equal division of the optical energy.
According to some embodiments of the present invention, the optical splitter of each of the plurality of sequentially connected optical splitting terminals has two first output terminals and outputs optical wave energy with unequal divisions, the output optical wave energy of one first output terminal of the optical splitter of each optical splitting terminal is greater than that of the other first output terminal, and the reflectivity of the code of the second optical fiber connected to the one first output terminal is less than that of the code of the second optical fiber connected to the other first output terminal.
A PON network monitoring system according to a fourth aspect embodiment of the present invention includes:
the light source module is used for outputting pulse light waves with different wavelengths;
the circulator comprises a first port, a second port and a third port, and the first port is connected with the output end of the light source module;
a wavelength demodulation module, the input end of which is connected with the third port;
the control module is electrically connected with the light source module and the wavelength demodulation module respectively;
the optical splitter terminal networking structure according to any one of the embodiments of the second aspect or the third aspect of the present invention, wherein an input end of the optical splitter terminal networking structure is connected to the second port;
a plurality of third optical fiber codes, wherein the input end of each third optical fiber code is connected with a plurality of output ends of the optical splitting terminal networking in a one-to-one correspondence manner;
and each communication input end is connected with the output end of each third optical fiber code in a one-to-one correspondence mode.
The PON network monitoring system provided by the embodiment of the invention at least has the following beneficial effects:
under the operation of the control module, sending out pulse optical waves to an optical splitting terminal networking through the light source module, reflecting the optical waves by a first optical fiber code in the optical splitting terminal networking and transmitting the optical waves back to the wavelength demodulation module, and identifying each optical splitter in the networking after processing; the second optical fiber codes in the light splitting terminal networking reflect the light waves and transmit the light waves to the wavelength demodulation module, and the identification of each light splitter branch in the networking is realized after the light waves are processed; the third optical fiber code reflects the light waves and transmits the light waves back to the wavelength demodulation module, and identification of each communication terminal is achieved after processing. By adjusting the encoding wavelength and reflectivity of each optical fiber code, unique and stable identification of each branch or node in the PON network can be realized.
According to some embodiments of the invention, the PON network monitoring system further comprises:
the input end of the first SOA optical switch is connected with the output end of the light source module, and the output end of the first SOA optical switch is connected with the first port of the circulator;
the input end of the second SOA optical switch is connected with the third port of the circulator, and the output end of the second SOA optical switch is connected with the input end of the wavelength demodulation module;
and the input end of the fourth optical fiber code is connected with the second port of the circulator, and the output end of the fourth optical fiber code is connected with the input end of the optical splitting terminal networking.
A PON network monitoring method according to a fifth embodiment of the present invention is applied to the PON network monitoring system according to any one of the fourth embodiments of the present invention, and includes the following steps:
outputting wide-spectrum pulse light waves to a circulator by a light source module, and respectively transmitting the wide-spectrum pulse light waves to a first optical fiber code, a second optical fiber code and a third optical fiber code through the circulator;
the circulator receives a plurality of reflected light waves reflected by the first optical fiber code, the second optical fiber code and the third optical fiber code respectively;
and the wavelength demodulation module processes the plurality of reflected light waves to finish the identification of each optical fiber code.
The PON network monitoring method provided by the embodiment of the invention at least has the following beneficial effects:
the PON network monitoring method provided by the embodiment of the invention is applied to a PON network monitoring system, so that a light source module sends out pulse light waves to a light splitting terminal networking, a first optical fiber code in the light splitting terminal networking reflects the light waves and transmits the light waves back to a wavelength demodulation module, and identification of each optical splitter in the networking is realized after processing; the second optical fiber codes in the light splitting terminal networking reflect the light waves and transmit the light waves to the wavelength demodulation module, and the identification of each light splitter branch in the networking is realized after the light waves are processed; the third optical fiber codes reflect the light waves and transmit the light waves back to the wavelength demodulation module, and the identification of each communication terminal is realized after the light waves are processed. By adjusting the encoding wavelength and reflectivity of each optical fiber code, unique and stable identification of each branch or node in the PON network can be realized.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a first optical splitting terminal according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a second optical splitting terminal according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a third optical splitting terminal according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a networking structure of a first multi-stage optical splitting terminal according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a networking structure of a second multi-stage optical splitter terminal according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a networking structure of a third multi-stage optical splitting terminal according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a PON network monitoring system according to an embodiment of the present invention;
fig. 8 is a flowchart of a PON network monitoring method according to an embodiment of the present invention.
Reference numerals:
a first fiber code 110; a beam splitter 120; a plurality of second fiber codes 130;
a beam splitting terminal group network structure 200;
a light source module 310; a circulator 320; a wavelength demodulation module 330; a control module 340; a first SOA optical switch 350; a second SOA optical switch 360; a fourth fiber encoding 370;
a third fiber encoding 410; a communication terminal 420.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, if there are first, second, etc. described, it is only for the purpose of distinguishing technical features, and it is not understood that relative importance is indicated or implied or that the number of indicated technical features is implicitly indicated or that the precedence of the indicated technical features is implicitly indicated.
In the description of the present invention, it should be understood that the orientation descriptions, such as the orientation or positional relationship indicated by upper, lower, etc., are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that unless otherwise explicitly defined, terms such as arrangement, installation, connection and the like should be broadly understood, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the embodiments described below are some, but not all embodiments of the present invention.
Referring to fig. 1 to 3, a fiber-splitting terminal according to an embodiment of the first aspect of the present invention includes a first fiber code 110, a splitter 120, and a plurality of second fiber codes 130. The optical splitter 120 includes a first input end and a plurality of first output ends, the first input end is connected to the output end of the first optical fiber code 110; the input ends of the second optical fiber codes 130 are respectively connected with the first output ends in a one-to-one correspondence manner, and the codes of the second optical fiber codes are different.
Specifically, as shown in fig. 1 to 3, the optical splitter 120 has a plurality of types, for example, an optical splitter 120 in which an output of 1 to 4 is equally divided, an optical splitter 120 in which an output of 1 to 2 is equally divided, and an optical splitter 120 in which an output of 1 to 2 is unequally divided. A first optical fiber code 110 is provided in front of the input end of the optical splitter 120, and the first optical fiber code 110 can be recognized, so that the first optical fiber code 110 is used as an element for recognizing the optical splitter 120. Each output branch of the optical splitter 120 is respectively provided with a second optical fiber code, and the code elements of each second optical fiber code are different and can be distinguished from each other, so that each second optical fiber code is used as an element for identifying each output branch of the optical splitter 120, and unique identification of each branch can be realized.
It should be noted that, for the encoding of different symbols for multiple optical fiber codes, on one hand, the encoding can be implemented by using different wavelengths for each optical fiber code, and on the other hand, the encoding can be implemented by using the same wavelength for each optical fiber code, but the bit spacing between the multiple bit codes is different. Further, in some embodiments, for the first fiber encoding 110, four-bit symbols may be employed, such as: 1510. 1511, 1512, 1513, for a certain second fiber code, one bit symbol may be used, for example: 1541 and therefore for the branch on which this second fiber code is located, the combined code is 15101511151215131541, to achieve a unique code for that branch.
The first fiber code 110 is used to identify the optical splitter 120 by connecting the first fiber code 110 in front of the optical splitter 120; each branch of the optical splitter 120 is connected with a second optical fiber code, so that each second optical fiber code is used for identifying each branch; meanwhile, the second optical fiber code on each branch adopts different code elements for coding, so that each branch is distinguished, and the unique identification of the branch in the PON network is realized.
In some embodiments, as shown in fig. 1-3, the spatial distance between each second fiber code and the optical splitter 120 is different.
Referring to fig. 1 to 3, the spatial distance between the second optical fiber codes on the branches of the optical splitter 120 and the optical splitter 120 is set differently. It can be understood that, if the spatial distance between each second fiber code and the optical splitter 120 is set to be the same, the light wave is transmitted to each second fiber code after being split, which may cause each second fiber code to reflect the light wave almost at the same time, which easily causes difficulty in distinguishing each second fiber code, and increases the difficulty in identifying each branch. Therefore, a branch coding interval is arranged between every two second optical fiber codes, and the length of the branch coding interval is set to be the minimum spatial resolution of the monitoring station at the minimum, so that the codes on each branch are separated in space at distance, and the branch identification is prevented from being mixed.
Referring to fig. 1 to 3, a group network structure 200 of a drop terminal according to an embodiment of the second aspect of the present invention includes a drop terminal according to any one of the first aspect of the present invention.
It can be understood that the networking structure 200 of the optical splitting terminal in the embodiment of the present invention only employs one optical splitting terminal, so that the networking structure may directly refer to fig. 1 to 3 in the same manner, and description of the structure is not repeated.
Referring to fig. 4 to 6, a group network structure 200 of a drop terminal according to an embodiment of the third aspect of the present invention includes a plurality of drop terminals according to any one of the first aspect of the present invention, and the plurality of drop terminals are connected in sequence.
Specifically, as shown in fig. 4 to 6, there are various combinations of the plurality of optical splitting terminals, and the basic connection manner is to connect an input terminal of one optical splitting terminal with an output terminal of another optical splitting terminal, that is, a multi-stage optical splitting terminal in a serial form can be formed by using the plurality of optical splitting terminals. However, in practical applications, for a multi-stage light splitting terminal, since it is necessary to ensure that the energy of light waves transmitted by each branch is sufficient, the cost of the light emitting source is too high due to the excessive arrangement of the multi-stage light splitting terminal, and thus the arrangement of the multi-stage light splitting terminal is not suitable for exceeding three stages.
It can be understood that, by using one or more optical splitting terminals to form the optical splitting terminal networking structure 200, the networking structure of one optical splitting terminal can be used to realize the identification of each path of the small PON network; for a networking structure adopting a plurality of light splitting terminals, the input end of one light splitting terminal is connected with one output end of the other light splitting terminal to form a second-level light splitting terminal, so that a plurality of light splitting terminals can be utilized to form a multi-level light splitting terminal. The networking formed by the multi-stage light splitting terminals can realize multi-branch identification in the network, thereby being beneficial to being applied to a large PON network for identification. For a multi-stage drop terminal in series, there is attenuation accumulation, so that stable identification of a branch can be achieved by adjusting the reflectivity of the plurality of second fiber codes 130.
In some embodiments, as shown in fig. 4, the optical splitter 120 of a first optical splitting terminal in the plurality of sequentially connected optical splitting terminals has a plurality of first output ends and outputs equally divided optical wave energy, the optical splitters 120 of each remaining optical splitting terminal have two first output ends and outputs unequally divided optical wave energy, the output optical wave energy of one first output end of the optical splitter 120 of each remaining optical splitting terminal is greater than the output optical wave energy of another first output end, and the reflectivity of the second optical fiber code connected to one first output end is less than the reflectivity of the second optical fiber code connected to another first output end.
Referring to fig. 4, in some embodiments, for a first optical splitting terminal in a plurality of sequentially connected optical splitting terminals, the optical splitter 120 may adopt a 1-in-4 output equal splitting optical splitter 120, and in some other embodiments, a 1-in-2 output equal splitting optical splitter 120 or a 1-in-multiple output equal splitting optical splitter 120 may also be adopted; the reflectivity of the first fiber code 110 of the first optical splitting terminal is 17%, and since the first optical splitting terminal can be understood as the first stage of the multi-stage optical splitting terminal, the reflected light wave can be monitored and identified by adopting the reflectivity of 17% on the premise that the light is not split; each second fiber code of the first drop terminal has a reflectivity of 90% and may have the same wavelength as the first fiber code 110 of the first drop terminal.
For the optical splitting terminal used in the second stage and the following stages, the optical splitter 120 may use an optical splitter 120 with 1 minute and 2 unequal outputs, and the specific unequal output ratio is 9:1, in some other embodiments, a 1-division-multiple-output-unequal splitter 120 may also be used, where the specific output unequal proportion is M: n, wherein M is not equal to N; the reflectivity of the first optical fiber code 110 of the light splitting terminal of the second stage and the later stages is 90%; for each light splitting terminal of the second stage and later stages, the reflectivity of the second optical fiber code connected with the first output end of 90% light wave energy output is 17%, the reflectivity of the second optical fiber code connected with the first output end of 10% light wave energy output is 90%, and the wavelength of the second optical fiber code is different from that of the second optical fiber code of the first stage light splitting terminal. For the second and subsequent stages, the input end of the latter stage of the optical splitting terminal needs to be connected with the output end of the high proportion (e.g., 90% optical energy output) optical energy output of the former stage of the optical splitting terminal.
It will be appreciated that for the optical splitter 120 with unequal output splitting, the loss of the branch of low split energy will be relatively severe, and therefore the corresponding second fiber encoding will need to employ a relatively greater reflectivity to ensure that the energy of the reflected light wave is sufficient to complete the identification of that branch. Meanwhile, when a plurality of optical splitting terminals are connected in series, the next-stage optical splitting terminal needs to be connected with a high-splitting-energy branch of the previous-stage optical splitting terminal, so that the minimum energy loss of the whole networking structure is ensured.
In some embodiments, as shown in fig. 5, the optical splitter 120 of each of the plurality of sequentially connected optical splitting terminals has a plurality of first outputs and outputs an equal division of optical energy.
Referring to fig. 5, in some embodiments, for a first optical splitter terminal in a plurality of optical splitter terminals connected in sequence, similarly, the optical splitter 120 may adopt a 1-in-4 output equal splitter 120, a 1-in-2 output equal splitter 120, or a 1-in-multiple output equal splitter 120; the reflectivity of the first optical fiber code 110 is 17%; each second fiber code has a reflectivity of 90% and a wavelength that is the same as the wavelength of the first fiber code 110.
For the optical splitter terminal used in the second stage and the following stages, the optical splitter 120 may adopt a 1-in-4 output equal splitter 120, or a 1-in-2 output equal splitter 120 or a 1-in-multiple output equal splitter 120; the reflectivity of the first optical fiber code 110 is 90%; the reflectivity of each second optical fiber code is 30%, and the wavelength of the second optical fiber code is required to be different from that of the second optical fiber code of the first light splitting terminal.
It will be appreciated that for the output splitter 120 to divide equally, the loss in each branch is relatively even, and therefore the reflectivity setting for each corresponding second fiber code is the same and relatively modest, e.g., 30%. Meanwhile, when a plurality of light splitting terminals are connected in series, because the light splitting energy of each branch is the same, any branch of the previous-stage light splitting terminal can be selected to be connected with the input end of the next-stage light splitting terminal.
In some embodiments, as shown in fig. 6, the optical splitter 120 of each of the plurality of sequentially connected optical splitting terminals has two first output ends and the output optical energy is not equally divided, the output optical energy of one first output end of the optical splitter 120 of each optical splitting terminal is greater than that of the other first output end, and the reflectivity of the code of the second optical fiber connected to the one first output end is less than that of the code of the second optical fiber connected to the other first output end.
Referring to fig. 6, in some embodiments, for each of the plurality of sequentially connected optical splitting terminals, the optical splitter 120 thereof adopts an optical splitter 120 with 1-in-2 output unequal divisions, and the specific output unequal division ratio is 9:1, in some other embodiments, a 1-division-multiple-output-unequal splitter 120 may also be used, where the specific output unequal proportion is M: n, wherein M is not equal to N; the reflectivity of the first fiber code 110 of each light splitting terminal is 17%; for each light splitting terminal, the reflectivity of the second optical fiber code connected with the first output end of 90% light wave energy output is 17%, the reflectivity of the second optical fiber code connected with the first output end of 10% light wave energy output is 90%, and the wavelength of the second optical fiber code of the light splitter 120 of each light splitting terminal can be set arbitrarily. The input end of the rear-stage optical splitting terminal needs to be connected with the output end of the high-proportion (for example, 90% optical energy output) optical energy output of the front-stage optical splitting terminal.
Similarly, for the optical splitter 120 with unequal output, the loss of the branch with low split energy will be relatively severe, so that the corresponding second fiber code needs to use a relatively larger reflectivity to ensure that the energy of the reflected light wave is sufficient to complete the identification of the branch. Meanwhile, when a plurality of optical splitting terminals are connected in series, the next-stage optical splitting terminal needs to be connected with a high-splitting-energy branch of the previous-stage optical splitting terminal, so that the minimum energy loss of the whole networking structure is ensured.
Referring to fig. 7, a PON network monitoring system according to a fourth embodiment of the present invention includes an optical source module 310, a circulator 320, a wavelength demodulation module 330, a control module 340, the optical distribution terminal networking structure 200 according to any one of the second and third embodiments of the present invention, a plurality of third optical fiber codes 410, and a plurality of communication terminals 420. The light source module 310 is used for outputting pulsed light waves with different wavelengths; the circulator 320 includes a first port, a second port, and a third port, the first port is connected to the output end of the light source module 310; the input end of the wavelength demodulation module 330 is connected with the third port; the control module 340 is electrically connected to the light source module 310 and the wavelength demodulation module 330, respectively; the input end of the light splitting terminal networking structure 200 is connected with the second port; the input end of each third optical fiber code 410 is connected with a plurality of output ends of the optical splitting terminal network in a one-to-one correspondence manner; each communication input is connected to the output of each third fiber-optic code 410 in a one-to-one correspondence.
Referring to fig. 7, under the control operation of the control module 340, the light source module 310 emits pulsed light waves with different wavelengths to the circulator 320, the circulator 320 transmits the pulsed light waves to the PON network, that is, the optical splitter networking structure 200 and the communication terminal 420, after the light waves are transmitted to the first optical fiber code 110, the second optical fiber code, and the third optical fiber code 410, the light waves are reflected and transmitted back to the circulator 320 according to different reflectivities or wavelengths, and further transmitted to the wavelength demodulation module 330 for processing, so as to implement unique and stable identification of each optical splitter 120, each branch of each optical splitter 120, and each communication device, respectively. Specifically, the wavelength demodulation module 330 may adopt a wavelength demodulator, the core processor of the control module 340 may adopt a single chip, a DSP, or an ARM, and specifically, an STM32 series processor may be used.
It can be understood that, under the operation of the control module 340, the light source module 310 sends out pulsed light waves to the optical splitting terminal networking, and the first optical fiber code 110 in the optical splitting terminal networking reflects the light waves and transmits the reflected light waves back to the wavelength demodulation module 330, so as to implement the identification of each optical splitter 120 in the networking after the processing; the second optical fiber code in the optical splitting terminal networking reflects the light wave and transmits the light wave back to the wavelength demodulation module 330, and the identification of each optical splitter 120 branch in the networking is realized after the processing; the third fiber code 410 reflects the optical wave and transmits the reflected optical wave back to the wavelength demodulation module 330, and the identification of each communication terminal 420 is realized after processing. By adjusting the encoding wavelength and reflectivity of each optical fiber code, unique and stable identification of each branch or node in the PON network can be realized.
In some embodiments, as shown in fig. 7, the PON network monitoring system further comprises a first SOA optical switch 350, a second SOA optical switch 360, and a fourth fiber code 370. The input end of the first SOA optical switch 350 is connected to the output end of the light source module 310, and the output end is connected to the first port of the circulator 320; the input end of the second SOA optical switch 360 is connected to the third port of the circulator 320, and the output end is connected to the input end of the wavelength demodulation module 330; the input end of the fourth optical fiber code 370 is connected to the second port of the circulator 320, and the output end is connected to the input end of the optical splitting terminal networking.
It can be appreciated that by setting the first SOA optical switch 350, the light intensity of the pulsed light source sent by the light source module 310 can be enhanced; by arranging the second SOA optical switch 360, the light intensity of the reflected light waves of each optical fiber code received by the circulator 320 can be enhanced; by setting the fourth optical fiber code 370, the communication terminal 420 can identify the monitoring unit composed of the light source module 310, the circulator 320, the wavelength demodulation module 330, and the control module 340.
Referring to fig. 8, a PON network monitoring method according to a fifth embodiment of the present invention is applied to a PON network monitoring system according to any one of the embodiments of the fourth aspect of the present invention, and includes the following steps:
the light source module 310 outputs a wide-spectrum pulse light wave to the circulator 320, and the wide-spectrum pulse light wave is transmitted to the first optical fiber code 110, the second optical fiber code and the third optical fiber code 410 through the circulator 320;
the circulator 320 receives a plurality of reflected light waves reflected by the first optical fiber code 110, the second optical fiber code, and the third optical fiber code 410, respectively;
the wavelength demodulation module 330 processes the plurality of reflected light waves to complete identification of each fiber code.
Fig. 8 is a flowchart of a PON network monitoring method according to an embodiment of the fifth aspect of the present invention. It should be noted that the PON network monitoring system according to the embodiment of the present application is used to implement the PON network monitoring method, the PON network monitoring method according to the embodiment of the present application corresponds to the PON network monitoring system, and a specific processing procedure refers to the PON network monitoring system, which is not described herein again.
It can be understood that, the PON network monitoring method according to the embodiment of the present invention is applied to a PON network monitoring system, so that the light source module 310 sends out pulsed light waves to the optical splitting terminal networking, the first optical fiber code 110 in the optical splitting terminal networking reflects the light waves and transmits the reflected light waves back to the wavelength demodulation module 330, and after processing, the identification of each optical splitter 120 in the networking is realized; the second optical fiber code in the optical splitting terminal networking reflects the light wave and transmits the light wave back to the wavelength demodulation module 330, and the identification of each optical splitter 120 branch in the networking is realized after the light wave is processed; the third fiber code 410 reflects the optical wave and transmits the reflected optical wave back to the wavelength demodulation module 330, and the identification of each communication terminal 420 is realized after the reflected optical wave is processed. By adjusting the encoding wavelength and reflectivity of each optical fiber code, unique and stable identification of each branch or node in the PON network can be realized.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
One of ordinary skill in the art will appreciate that all or some of the steps, systems, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as is well known to those skilled in the art.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims (10)

1. A spectroscopic terminal, comprising:
a first fiber encoding;
the optical splitter comprises a first input end and a plurality of first output ends, and the first input end is connected with the output end of the first optical fiber code;
and the input ends of the second optical fiber codes are respectively connected with the first output ends in a one-to-one correspondence manner, and the codes of the second optical fiber codes are different.
2. The terminal of claim 1, wherein each of the second fiber codes has a different spatial distance from the optical splitter.
3. A network of light splitting terminals, comprising a light splitting terminal according to claim 1.
4. A group network structure of optical splitting terminals, comprising a plurality of optical splitting terminals according to claim 1, wherein the plurality of optical splitting terminals are connected in sequence.
5. The networking structure of claim 4, wherein the optical splitter of a first optical splitting terminal among the plurality of sequentially connected optical splitting terminals has a plurality of the first output terminals and outputs equally divided optical wave energy, the optical splitters of each of the remaining optical splitting terminals have two of the first output terminals and output equally divided optical wave energy, the output optical wave energy of one of the first output terminals of the optical splitters of each of the remaining optical splitting terminals is greater than that of the other first output terminal, and the reflectivity of the code of the second optical fiber connected to the one first output terminal is less than that of the code of the second optical fiber connected to the other first output terminal.
6. The networking structure of claim 4, wherein the splitter of each of a plurality of sequentially connected splitter terminals has a plurality of the first output ports and outputs an equal division of optical energy.
7. The networking structure of claim 4, wherein the splitter of each of the plurality of sequentially connected splitter terminals has two of the first output terminals and outputs unequal split of optical energy, the output optical energy of one of the first output terminals of the splitter of each splitter terminal is greater than that of the other first output terminal, and the reflectivity of the code of the second optical fiber connected to the one first output terminal is less than that of the code of the second optical fiber connected to the other first output terminal.
8. A PON network monitoring system, comprising:
the light source module is used for outputting pulse light waves with different wavelengths;
the circulator comprises a first port, a second port and a third port, and the first port is connected with the output end of the light source module;
a wavelength demodulation module, the input end of which is connected with the third port;
the control module is electrically connected with the light source module and the wavelength demodulation module respectively;
the networking structure of claim 3 to 7, wherein the input terminal of the networking structure is connected to the second port;
a plurality of third optical fiber codes, wherein the input end of each third optical fiber code is connected with a plurality of output ends of the optical splitting terminal networking in a one-to-one correspondence manner;
and each communication input end is connected with the output end of each third optical fiber code in a one-to-one correspondence mode.
9. The PON network monitoring system of claim 8, further comprising:
the input end of the first SOA optical switch is connected with the output end of the light source module, and the output end of the first SOA optical switch is connected with the first port of the circulator;
the input end of the second SOA optical switch is connected with the third port of the circulator, and the output end of the second SOA optical switch is connected with the input end of the wavelength demodulation module;
and the input end of the fourth optical fiber code is connected with the second port of the circulator, and the output end of the fourth optical fiber code is connected with the input end of the optical splitting terminal networking.
10. A PON network monitoring method applied to the PON network monitoring system according to claim 8 or 9, comprising the steps of:
the light source module outputs wide-spectrum pulse light waves to the circulator, and the wide-spectrum pulse light waves are transmitted to the first optical fiber code, the second optical fiber code and the third optical fiber code through the circulator respectively;
the circulator receives a plurality of reflected light waves reflected by the first optical fiber code, the second optical fiber code and the third optical fiber code respectively;
and the wavelength demodulation module processes the plurality of reflected light waves to complete the identification of each optical fiber code.
CN202210929892.8A 2022-08-02 2022-08-02 Light splitting terminal, networking structure, PON network monitoring system and method Pending CN115426047A (en)

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