CN108462550B - Splicing structure of wavelength division multiplexing system - Google Patents
Splicing structure of wavelength division multiplexing system Download PDFInfo
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- CN108462550B CN108462550B CN201810184328.1A CN201810184328A CN108462550B CN 108462550 B CN108462550 B CN 108462550B CN 201810184328 A CN201810184328 A CN 201810184328A CN 108462550 B CN108462550 B CN 108462550B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0201—Add-and-drop multiplexing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0201—Add-and-drop multiplexing
- H04J14/0202—Arrangements therefor
- H04J14/0205—Select and combine arrangements, e.g. with an optical combiner at the output after adding or dropping
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Abstract
The application provides a splicing structure of a wavelength division multiplexing system, which comprises the following components: the optical multiplexer comprises a first wavelength division multiplexer, a second wavelength division multiplexer, a third wavelength division multiplexer, a fourth wavelength division multiplexer and a fifth wavelength division multiplexer, wherein the first wavelength division multiplexer comprises a COM port and is used for receiving optical signals with first wavelength and second wavelength and transmitting optical signals with third wavelength and fourth wavelength, the fourth wavelength division multiplexer comprises a d4 port and is used for outputting the optical signals with the first wavelength and receiving the optical signals with the third wavelength, and the fifth wavelength division multiplexer comprises an e4 port and is used for outputting the optical signals with the second wavelength and receiving the optical signals with the fourth wavelength. The structure provided by the application realizes the transmission of optical signals with 4 wavelengths at a COM port, and the two optical signals are subjected to add/drop multiplexing, thereby meeting the requirement of optical broadband improvement.
Description
Technical Field
The application relates to the technical field of optical communication, in particular to a splicing structure of a wavelength division multiplexing system.
Background
Optical wavelength division multiplexing (WDM: wavelength division multiplexer) is a technique in which a series of information-bearing optical carriers are transmitted together along a single optical fiber at wavelength intervals of 1 to several hundred nanometers in the optical frequency domain; and a certain method is used at the receiving end to separate the optical carriers with different wavelengths (multiplexing technology of optical fiber communication). NG-PON2, also called "next generation passive optical network", is currently the most common FTTH networking mode applied at home and abroad is GPON technology based on 2.5Gbps rate, multiple users share one optical fiber, and currently, users are provided with a broadband service package with the highest rate of 330 Mbps. The NG PON2 technology can realize smooth upgrade to TWDM PON (40 Gbps) or XGS PON (10 Gbps) based on 2.5Gbps GPON network, three different PON systems apply different wavelengths and coexist on the same optical fiber, the same PON network can be compatible with ONU of three rates of GPON, XGS PON and TWDM PON, and the requirement of operators on continuous upgrade of bandwidth can be met. NG-PON2 is considered as a choice of next-generation PON technology, and has characteristics of large bandwidth, large optical splitting, long distance, and the like. It is anticipated that various optical access technologies, such as NG-PON2 and existing PON, and even copper wire access technologies will coexist for a significant period of time in the future. Therefore, the technology upgrading is realized, the prior art and the original resources are utilized to the maximum extent, and the method is a direction of common efforts among all parties in the industry.
In the existing optical wavelength division multiplexing technology, when optical signals containing all wavelengths are separated, a dielectric film type wavelength division multiplexer is generally adopted to realize the separation operation of optical wave carriers, and the optical wave carriers divide light with different wavelengths in the same optical fiber into two other optical fibers by transmitting and reflecting light with different wavelengths on a dielectric film. The optical fibers containing all wavelengths are called COM ports, and two optical fibers containing different wavelengths are called port1 and port 2. In the prior art, in the wavelength division multiplexing process, only the optical signals with two specified wavelengths can be separated, and when the optical carrier contains more carriers with the wavelengths, the optical add/drop multiplexing of the optical signals with multiple wavelengths is difficult to realize, so that the improvement of the optical broadband is limited.
Disclosure of Invention
In order to solve the problem that in the prior art, a system for optical division multiplexing can only realize 2 kinds of optical signal transmission with different wavelengths at a COM port and is difficult to carry out division multiplexing on optical signals with more wavelengths, the splicing structure of the wavelength division multiplexing system is provided.
According to an aspect of the present application, there is provided a splicing structure of a wavelength division multiplexing system, the structure comprising:
a first wavelength division multiplexer for receiving an optical signal containing a first wavelength and a second wavelength from the COM port and transmitting the optical signal to the second wavelength division multiplexer;
a second wavelength division multiplexer for receiving the optical signals including the first wavelength and the second wavelength and outputting the optical signals of the first wavelength and the optical signals of the second wavelength at different ports respectively;
a third wavelength division multiplexer for receiving the optical signal of the second wavelength and transmitting the optical signal of the second wavelength to a fifth wavelength division multiplexer;
a fourth wavelength division multiplexer, configured to receive the optical signal of the first wavelength and output the optical signal of the first wavelength at a PORT1 PORT;
a fifth wavelength division multiplexer, configured to receive the optical signal of the second wavelength and output the optical signal of the second wavelength at a PORT2 PORT;
the fifth wavelength division multiplexer is further configured to receive an optical signal of a fourth wavelength through the PORT2 PORT and send the optical signal of the fourth wavelength to the fourth wavelength division multiplexer;
the fourth wavelength division multiplexer is further configured to receive an optical signal of a third wavelength through the PORT1 PORT, receive an optical signal of a fourth wavelength transmitted from the fifth wavelength division multiplexer, and transmit an optical signal including the third wavelength and the fourth wavelength to the first wavelength division multiplexer;
the first wavelength division multiplexer is further configured to receive the optical signal including the third wavelength and the fourth wavelength and output the optical signal including the third wavelength and the fourth wavelength at a COM port.
The first wavelength division multiplexer comprises an a1 port, an a2 port and an a3 port, wherein the a1 port is a COM port, the a3 port is used for transmitting optical signals of a first wavelength and a second wavelength, and the a2 port is used for receiving optical signals of a third wavelength and a fourth wavelength.
The second wavelength division multiplexer comprises a b1 port, a b2 port and a b3 port, wherein the b1 port is used for receiving the optical signals with the first wavelength and the second wavelength, the b3 port is used for outputting the optical signals with the first wavelength, and the b2 port is used for outputting the optical signals with the second wavelength.
The third wavelength division multiplexer comprises a c1 port and a c3 port, wherein the c1 port is used for receiving the optical signal of the first wavelength, and the c3 port is used for outputting the optical signal of the first wavelength.
The fourth wavelength division multiplexer comprises d1, d2, d3 and d4 PORTs, wherein the d1 PORT is used for outputting optical signals comprising a third wavelength and a fourth wavelength, the d2 PORT is used for receiving the optical signals of the fourth wavelength, the d3 PORT is used for receiving the optical signals of the first wavelength, and the d4 PORT is a PORT1 PORT and used for outputting the optical signals of the first wavelength and receiving the optical signals of the third wavelength.
The fifth wavelength division multiplexer comprises an e1 PORT, an e3 PORT and an e4 PORT, wherein the e4 PORT is a PORT2 PORT and is used for outputting optical signals of a second wavelength and receiving optical signals of a fourth wavelength, the e1 PORT is used for outputting optical signals of the fourth wavelength, and the e3 PORT is used for receiving optical signals of the second wavelength.
Wherein the third wavelength division multiplexer further comprises a c2 port for outputting an optical signal comprising the second wavelength.
The fifth wavelength division multiplexer further comprises an e2 port for outputting an optical signal containing the second wavelength and receiving an optical signal containing the fourth wavelength.
In a second aspect, the present application further provides a wavelength division multiplexing system based on the splicing structure of the wavelength division multiplexing system provided in the first aspect, including: a first wavelength division multiplexing system splicing structure and a second wavelength division multiplexing system splicing structure;
the first COM port of the first wavelength division multiplexing system splicing structure and the second COM port of the second wavelength division multiplexing system splicing structure are connected with an optical splitter, and the optical splitter is used for combining optical signals of the first COM port and optical signals of the second COM port into optical signals containing 4 different wavelengths and sending the optical signals containing four different wavelengths to the first COM port and the second COM port.
The structure provided by the application can realize that a plurality of optical signals containing a plurality of wavelengths are received for carrying out light splitting operation, single optical signals with different wavelengths are output at corresponding output ports, meanwhile, the optical signals with different wavelengths input by different ports are combined and output at a COM, the optical signals with 4 wavelengths are transmitted and exchanged, the two optical signals are subjected to the optical add/drop multiplexing, and the requirement of optical broadband improvement is met.
Drawings
Fig. 1 is a block diagram of a splicing structure of a wavelength division multiplexing system according to an embodiment of the present application;
fig. 2 is a block diagram of a wavelength division multiplexing system according to another embodiment of the present application.
Detailed Description
The following describes in further detail the embodiments of the present application with reference to the drawings and examples. The following examples are illustrative of the application and are not intended to limit the scope of the application.
Referring to fig. 1, fig. 1 is a block diagram of a splicing structure of a wavelength division multiplexing system according to an embodiment of the present application, including:
a first wavelength division multiplexer a for receiving an optical signal including a first wavelength and a second wavelength from the COM port and transmitting the optical signal to the second wavelength division multiplexer;
a second wavelength division multiplexer B for receiving optical signals including a first wavelength and a second wavelength and outputting the optical signals of the first wavelength and the second wavelength at different ports, respectively;
a third wavelength division multiplexer C for receiving the optical signal of the second wavelength and transmitting the optical signal of the second wavelength to a fifth wavelength division multiplexer;
a fourth wavelength division multiplexer D, configured to receive an optical signal of the first wavelength and output the optical signal of the first wavelength at the PORT1 PORT;
a fifth wavelength division multiplexer E, configured to receive the optical signal of the second wavelength and output the optical signal of the second wavelength at the PORT2 PORT;
the fifth wavelength division multiplexer is further configured to receive an optical signal of a fourth wavelength through the PORT2 PORT and send the optical signal of the fourth wavelength to the fourth wavelength division multiplexer;
the fourth wavelength division multiplexer is further configured to receive an optical signal of a third wavelength through the PORT1 PORT, receive an optical signal of a fourth wavelength transmitted from the fifth wavelength division multiplexer, and transmit an optical signal including the third wavelength and the fourth wavelength to the first wavelength division multiplexer;
the first wavelength division multiplexer is further configured to receive an optical signal including the third wavelength and the fourth wavelength and output the optical signal including the third wavelength and the fourth wavelength at the COM port.
The first wavelength division multiplexer comprises an a1 port, an a2 port and an a3 port, wherein the a1 port is a COM port, the a3 port is used for transmitting optical signals of a first wavelength and a second wavelength, and the a2 port is used for receiving optical signals of a third wavelength and a fourth wavelength.
The second wavelength division multiplexer comprises a b1 port, a b2 port and a b3 port, wherein the b1 port is used for receiving optical signals comprising a first wavelength and a second wavelength, the b3 port is used for outputting the optical signals of the first wavelength, and the b2 port is used for outputting the optical signals of the second wavelength.
The third wavelength division multiplexer comprises a c1 port and a c3 port, wherein the c1 port is used for receiving the optical signal of the first wavelength, and the c3 port is used for outputting the optical signal of the first wavelength.
The fourth wavelength division multiplexer comprises d1, d2, d3 and d4 PORTs, wherein the d1 PORT is used for outputting optical signals comprising a third wavelength and a fourth wavelength, the d2 PORT is used for receiving the optical signals of the fourth wavelength, the d3 PORT is used for receiving the optical signals of the first wavelength, and the d4 PORT is a PORT1 PORT and used for outputting the optical signals of the first wavelength and receiving the optical signals of the third wavelength.
The fifth wavelength division multiplexer comprises an e1 PORT, an e3 PORT and an e4 PORT, wherein the e4 PORT is a PORT2 PORT and is used for outputting optical signals of a second wavelength and receiving optical signals of a fourth wavelength, the e1 PORT is used for outputting optical signals of the fourth wavelength, and the e3 PORT is used for receiving optical signals of the second wavelength.
Specifically, the optical signal received at the COM port may be an optical signal containing multiple wavelengths, after the first wavelength division multiplexer receives the optical signal, the optical signal is transmitted through the a3 port and sent to the b1 port of the second wavelength division multiplexer, the second wavelength division multiplexer includes the b1 port, the b2 port and the b3 port, and the b2 port is configured to refract the optical signal containing the second wavelength in the optical signal, and the optical signals of other wavelengths cannot be emitted from the b2 port. The b3 port is configured to transmit the optical signal containing the first wavelength, and filter out the light of other wavelengths, so that the optical signals output from the b2 port and the b3 port are the optical signals to be output.
After the optical signal containing the first wavelength is received through the d3 PORT of the fourth wavelength division multiplexer, the optical signal is refracted and output through the d4 PORT, and the d4 PORT is the PORT1 PORT; the optical signal containing the second wavelength is input through the c1 PORT of the third wavelength division multiplexer, transmitted and output from the c3 PORT, then input through the e3 PORT of the fifth wavelength division multiplexer, and then refracted and output from the e4 PORT, wherein the e4 PORT is the PORT2 PORT.
On the other hand, the PORT1 PORT and the PORT2 PORT can respectively receive an optical signal containing the 3 rd wavelength and an optical signal containing the fourth wavelength, the optical signal containing the fourth wavelength is transmitted and output through the PORT2 PORT and then sent to the d2 PORT of the fourth wavelength division multiplexer, at this time, the fourth wavelength division multiplexer obtains the optical signal of the fourth wavelength from the d2 PORT, obtains the optical signal of the third wavelength from the d4 PORT, and then can combine and output the two optical signals of different wavelengths at the d1 PORT, and sends the signals to the a2 PORT of the first wavelength division multiplexer, and then carries out reflection output through the a1 PORT.
Through the structure, the optical signals with multiple wavelengths can be received for carrying out light splitting operation, single optical signals with different wavelengths are output at corresponding output ports, meanwhile, the optical signals with different wavelengths input by different ports are combined and output at a COM, the optical signals with 4 wavelengths are transmitted and exchanged, the two optical signals are subjected to the add-drop multiplexing, and the requirement of optical broadband improvement is met.
In addition to the above embodiment, the third wavelength division multiplexer further includes a c2 port for refracting an optical signal including the second wavelength. The fifth wavelength division multiplexer further includes an e2 port for transmitting an optical signal including the second wavelength and receiving an optical signal including the fourth wavelength.
Specifically, the structure includes 2 reserved interfaces, namely, a c2 interface of the third wavelength division multiplexer and an e2 interface of the fifth wavelength division multiplexer, which can output optical signals of the second wavelength and optical signals of the first wavelength respectively, and can be used for receiving returned optical signals. Through the structure, more equipment access can be realized when equipment expansion is required.
On the basis of the embodiment, the ports are connected through single-mode optical fibers. The single-mode optical fiber and each port are connected in an optical fiber fusion mode.
Specifically, the ports among the five wavelength division multiplexers are connected by adopting a single-mode fiber, the single-mode fiber has a core diameter of 10 microns, single-mode light beam transmission can be allowed, the restrictions of bandwidth and vibration mode dispersion can be eliminated, the single-mode fiber can support a longer transmission distance compared with a multimode fiber, and the single-mode fiber can support a transmission distance exceeding 5000m in 100Mbps Ethernet to 1G gigabit network.
The optical fiber fusion technology mainly uses a fiber fusion machine to connect optical fibers with optical fibers or optical fibers with tail fibers, fuses bare fibers and optical fiber tail fibers in an optical cable into a whole, and the tail fibers are provided with an independent optical fiber head.
In another embodiment of the present application, referring to fig. 2, fig. 2 is a block diagram of a wavelength division multiplexing system according to another embodiment of the present application, where the system includes a first wavelength division multiplexing system splicing structure, a second wavelength division multiplexing system splicing structure, and a 1*2 optical splitter, and the first COM port of the first wavelength division multiplexing system splicing structure and the second COM port of the second wavelength division multiplexing system splicing structure are connected to the optical splitter, and the optical splitter is configured to combine an optical signal of the first COM port and an optical signal of the second COM port into an optical signal containing 4 different wavelengths, and send the optical signal containing four different wavelengths to the first COM port and the second COM port.
Specifically, the COM1 port of each wavelength division multiplexing system splicing structure may output two optical signals with different wavelengths, that is, the COM1 port of the first wavelength division multiplexing system splicing structure outputs an optical signal containing a fifth wavelength and a sixth wavelength, and the COM2 port of the second wavelength division multiplexing system splicing structure outputs an optical signal containing a seventh wavelength and an eighth wavelength, and after being integrated by the optical splitter, the optical signals containing the fifth wavelength, the sixth wavelength, the seventh wavelength and the eighth wavelength are formed as output signals. On the other hand, the optical splitter may receive optical signals including a first wavelength, a second wavelength, a third wavelength and a fourth wavelength, and send the optical signals to the COM1 PORT and the COM2 PORT after splitting, and because the optical splitter only can split the optical signals, the optical signals received at the COM1 PORT and the COM2 PORT are all optical signals including 4 different wavelengths, and after modulation of the two wdm system splicing structures, four optical signals with different wavelengths are respectively output at the output PORTs, that is, the PORT1 PORT of the first wdm system splicing structure outputs the optical signal with the first wavelength, the PORT2 PORT outputs the optical signal with the second wavelength, the PORT3 PORT in the second wdm system splicing structure outputs the optical signal with the third wavelength, and the PORT4 PORT outputs the optical signal with the fourth wavelength, and at the same time, each PORT receives the optical signals with different wavelengths respectively, and outputs the optical signals through the respective PORTs after integration.
By the system, the input and output of 8 optical signals with different wavelengths at one PORT are realized, the input and output of the optical signals with different wavelengths can be carried out at each PORT, the wavelengths of each PORT are different, and the support is provided for the promotion of the optical broadband.
Finally, the method of the present application is only a preferred embodiment and is not intended to limit the scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (9)
1. A wavelength division multiplexing system, comprising:
a first wavelength division multiplexer for receiving an optical signal containing a first wavelength and a second wavelength from the COM port and transmitting the optical signal to the second wavelength division multiplexer;
a second wavelength division multiplexer for receiving the optical signals including the first wavelength and the second wavelength and outputting the optical signals of the first wavelength and the optical signals of the second wavelength at different ports respectively;
a third wavelength division multiplexer for receiving the optical signal of the second wavelength and transmitting the optical signal of the second wavelength to a fifth wavelength division multiplexer;
a fourth wavelength division multiplexer, configured to receive the optical signal of the first wavelength and output the optical signal of the first wavelength at a PORT1 PORT;
a fifth wavelength division multiplexer, configured to receive the optical signal of the second wavelength and output the optical signal of the second wavelength at a PORT2 PORT;
the fifth wavelength division multiplexer is further configured to receive an optical signal of a fourth wavelength through the PORT2 PORT and send the optical signal of the fourth wavelength to the fourth wavelength division multiplexer;
the fourth wavelength division multiplexer is further configured to receive an optical signal of a third wavelength through the PORT1 PORT, receive an optical signal of a fourth wavelength transmitted from the fifth wavelength division multiplexer, and transmit an optical signal including the third wavelength and the fourth wavelength to the first wavelength division multiplexer;
the first wavelength division multiplexer is further configured to receive the optical signal including the third wavelength and the fourth wavelength and output the optical signal including the third wavelength and the fourth wavelength at a COM port.
2. The wavelength division multiplexing system of claim 1, wherein the first wavelength division multiplexer comprises a1, a2, and a3 ports, wherein the a1 port is a COM port, the a3 port is configured to transmit optical signals at a first wavelength and a second wavelength, and the a2 port is configured to receive optical signals at a third wavelength and a fourth wavelength.
3. The wavelength division multiplexing system of claim 2, wherein the second wavelength division multiplexer comprises b1, b2, and b3 ports, wherein the b1 port is configured to receive the optical signal comprising the first wavelength and the second wavelength, the b3 port is configured to output the optical signal of the first wavelength, and the b2 port is configured to output the optical signal of the second wavelength.
4. The wavelength division multiplexing system of claim 2, wherein the third wavelength division multiplexer comprises c1 and c3 ports, wherein the c1 port is configured to receive the optical signal at the first wavelength and the c3 port is configured to output the optical signal at the first wavelength.
5. The wdm system of claim 2, wherein the fourth wdm comprises d1, d2, d3 and d4 PORTs, wherein the d1 PORT is configured to output optical signals including third and fourth wavelengths, the d2 PORT is configured to receive the optical signals of the fourth wavelength, the d3 PORT is configured to receive the optical signals of the first wavelength, and the d4 PORT is a PORT1 PORT configured to output the optical signals of the first wavelength and receive the optical signals of the third wavelength.
6. The wdm system of claim 2, wherein the fifth wdm comprises e1, e3 and e4 PORTs, wherein e4 is a PORT2 PORT for outputting optical signals at the second wavelength and receiving optical signals at the fourth wavelength, and wherein the e1 PORT is for outputting optical signals at the fourth wavelength and the e3 PORT is for receiving optical signals at the second wavelength.
7. The wdm system of claim 4, wherein the third wdm further comprises a c2 port configured to output an optical signal containing the second wavelength.
8. The wdm system of claim 6, wherein the fifth wdm further comprises an e2 port configured to output an optical signal including the second wavelength and to receive an optical signal including the fourth wavelength.
9. A wavelength division multiplexing system, comprising: a first wavelength division multiplexing system and a second wavelength division multiplexing system; the first and second wavelength division multiplexing systems are each based on the wavelength division multiplexing system of any one of claims 1-8;
the first COM port of the first wavelength division multiplexing system and the second COM port of the second wavelength division multiplexing system are connected with an optical splitter, and the optical splitter is used for combining the optical signals of the first COM port and the optical signals of the second COM port into optical signals containing 4 different wavelengths and sending the optical signals containing four different wavelengths to the first COM port and the second COM port.
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| CN1973463A (en) * | 2004-04-27 | 2007-05-30 | 赛伯特株式会社 | Optical transmission system of ring type |
| CN101662703A (en) * | 2008-08-27 | 2010-03-03 | 华为技术有限公司 | Passive optical network system, optical line terminal and transmission method of optical signals |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100584386B1 (en) * | 2004-07-30 | 2006-05-26 | 삼성전자주식회사 | Bidirectional optical add-drop multiplexer |
| CN101114885B (en) * | 2007-09-05 | 2011-07-27 | 华中科技大学 | Wavelength-division and time division multiplex mixing passive optical network system, terminal and signal transmission method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1973463A (en) * | 2004-04-27 | 2007-05-30 | 赛伯特株式会社 | Optical transmission system of ring type |
| CN101662703A (en) * | 2008-08-27 | 2010-03-03 | 华为技术有限公司 | Passive optical network system, optical line terminal and transmission method of optical signals |
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