CN2636503Y - Single fiber double wave four channel transmission converter - Google Patents
Single fiber double wave four channel transmission converter Download PDFInfo
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- CN2636503Y CN2636503Y CNU032742959U CN03274295U CN2636503Y CN 2636503 Y CN2636503 Y CN 2636503Y CN U032742959 U CNU032742959 U CN U032742959U CN 03274295 U CN03274295 U CN 03274295U CN 2636503 Y CN2636503 Y CN 2636503Y
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Abstract
The utility model relates to an optical communication transmission device, which is particularly suitable for a dual-wavelength single-fiber four-way transmission converter, which is connected with two intercommunicated optical transmitters and receivers to realize two-way transmission through the optical transmitter and receiver. Wherein, one way is connected with an optical transmission source and the other way receives the optical transmission source. The single-fiber dual-wavelength four-way transmission converter realizes communication transmission through a single fiber. Compared with prior arts, the utility model has the advantages of four-way signal transmission on one fiber, no power source, small size, light weight, high stability and reliability, easy utilization, mounting and maintenance.
Description
Technical field
The utility model has related to a kind of optical communication transmitting device, is specially adapted to dual wavelength single fiber four-way transmission converter.
Background technology
Mostly present optical fiber telecommunications system is the two fine systems of single ripple, i.e. each transmits the signal of single wavelength transmitting-receiving with an optical fiber.Along with the fast development of optical communication, the use amount of optical fiber is increasing, and is in short supply and make full use of fiber resource in order to solve some areas optical fiber, adopts a kind of demand of single fiber bi-directional transmission having become optical communication development.Solve the single fiber bi-directional transmission demand and can adopt the multiplexing method of two wave-length divisions, method that also can single wavelength transmitted in both directions.The report of existing two-way OADM module in the prior art, the OADM module of its primary structure is made up of multiplexer, optical switch display, demodulation multiplexer etc., optical fiber links to each other with demodulation multiplexer, demodulation multiplexer links to each other with optical switch by optical fiber, the optical switch display is by optical fiber and demultiplexer, the OADM module of this structure has proposed restriction to road wavelength of optical signal up and down, i.e. the light signal of the identical wavelength of both direction transmission can not be up and down road up and down simultaneously.Also form by a plurality of circulators, a plurality of erbium-doped fiber amplifier, a plurality of reflective add-drop multiplexing module in the prior art by the two-way OADM module that adopts, but its complex structure, the cost height; Adopted catoptric arrangement, made this module, be unfavorable for the raising of this module performance the inhibition ability drop of reflecting background; Support the ability drop of light wave dynamic routing.
Single fiber double wave four-way transmission converter of the present utility model is exactly to adopt dual wavelength to carry out the product of single fiber four-way transmission.Use these products not need to change the transmission equipment at communication system two ends, only need add dual wavelength single fiber four-way transmission converter, just can will carry out the four-way transmission at the signal on two optical fiber and to an optical fiber originally at the two ends of circuit.It is without power supply, and volume is little, in light weight, and stability and reliability height are installed and used easy to maintenance.Dual wavelength single fiber four-way transmission converter can provide a transparent channel to signal, is applicable to Ethernet, and PDH, SDH transmission network are carried out the transmission of single fiber four-way signal.
Summary of the invention
The purpose of this utility model is achieved by the following technical solution: the utility model is connected to the optical transceiver of mutual communication, single fiber double wave four-way transmission converter divides two-way to transmit with two optical transceivers respectively, one the tunnel is to connect to send light source, one the tunnel receives light source, transmits by simple optical fiber connection carrying out communication between the single fiber double wave four-way transmission converter.
Transducer of the present utility model is made up of wavelength division multiplexer and two couplers, and each isolator is connected with receiving terminal with the light transmitting terminal of optical transceiver respectively, so that the transmission of optical transceiver, received signal process coupler and multiplexer connect the single fiber end again.
Isolator described in the utility model adopts 1310nm and 1550nmr single mode list window coupler respectively, and in three ports of this coupler, two ports are connected with receiving terminal with the transmitting terminal of optical transceiver, and the 3rd port is connected with wavelength division multiplexer.Described wavelength division multiplexer external connection end is connected with remote another wavelength division multiplexer communication by the 1310nm/1550nm single fiber.Described coupler adopts photosynthetic or optical branching device, and light signal is input to the light transmitting terminal of optical transceiver and the optical receiving end of optical transceiver behind coupler.Optical transceiver 1310nm wavelength sends and is divided into two-way after signal enters single mode list window coupler, and one the road is coupled to the 1310nm wavelength input of wavelength division multiplexer, and another road enters optical transceiver 1310nm wavelength receiving terminal through coupler.Be coupled to the signal loss 10% of wavelength division multiplexer 1310nm wavelength input; Coupler enters the signal loss 90% of optical transceiver 1310nm wavelength receiving terminal.
The utility model optical transceiver 1550nm wavelength sends and is divided into two-way after signal enters single mode list window coupler, and one the road is coupled to the 1550nm wavelength input of wavelength division multiplexer, and another road enters optical transceiver 1550nm wavelength receiving terminal through coupler.Be coupled to the signal loss 10% of wavelength division multiplexer 1550nm wavelength input; Coupler enters the signal loss 90% of optical transceiver 1550nm wavelength receiving terminal.
Wavelength division multiplexer external connection end described in the utility model is connected with remote another wavelength division multiplexer communication by the 1310nm/1550nm single fiber.
The utility model compared with prior art has signal and carry out the four-way transmission on an optical fiber, and without power supply, volume is little, in light weight, and stability and reliability height are installed and used easy to maintenance.
Description of drawings
Fig. 1 is a system configuration schematic diagram of the present utility model.
Fig. 2 is a converter structure schematic diagram of the present utility model.
Fig. 3 is that the utility model 1310nm signal sends and receive the transmission schematic diagram.
Fig. 4 is that the utility model 1550nm signal sends and receive the transmission schematic diagram.
Fig. 5 is a converter structure outline drawing of the present utility model.
Specific embodiment
Below in conjunction with description of drawings the utility model is described in further detail: as shown in Figure 1, single fiber double wave four-way transmission converter of the present utility model is connected respectively to four optical transceivers of mutual communication, transducer divides two-way to transmit with two optical transceivers respectively, one the tunnel is to connect to send light source, and one the tunnel receives light source.Transmit by simple optical fiber connection carrying out communication between the transducer.Single fiber double wave four-way transmission converter of the present utility model is made up of 1310nm single mode list window coupler, 1550nm single mode list window coupler and 1310nm, 1550nm wavelength division multiplexer and corresponding connector.It has five interfaces: 1310nm input port (T1), 1310nm delivery outlet (R1), 1550nm input port (T2), 1550nm delivery outlet (R2) and single fiber interface (COM).Except " COM " port adopted APC shape connector, all the other 4 ports all adopted FC/UPC type connector.Single fiber double wave four-way transmission converter can transmit the signal of two systems simultaneously with an optical fiber bidirectional, and one of these two system adopt the 1310nm wavelength, and one is adopted the 1550nm wavelength.The transmission of system 1 (1310nm) is connected with T1, receives to be connected with R1.The transmission of system 2 (1550nm) is connected with T2, receives to be connected with R2.The signal of four direction communicates with corresponding single fiber (COM) port of opposite end by simple optical fiber from single fiber (COM) port.The transducer base plate has four fixing holes, and available M3 screw is fixed.Transducer can be installed on the fibre distribution frame, also can be positioned over other place in the machine room.As shown in Figure 2, single fiber double wave four-way transmission converter 1 of the present utility model is made up of coupler 2,3 and wavelength division multiplexer 4, wherein two couplers 2,3 are connected with the light transmitting terminal of optical transceiver respectively, so that behind the transmission signal of optical transceiver process coupler 1 or the coupler 2, coupling ratio in 90%, light signal is sent to wave separater division multiplexer 4, and export by single fiber, be transferred to the dual wavelength single fiber four-way transmission converter of remote optical transceiver, be fed through the light signal receiving terminal of optical transceiver again.When from the optical communication signal of single fiber input through behind the wavelength division multiplexer 4, again by behind coupler 1 or the coupler 2,, light signal is sent to the optical receiving end of optical transceiver also in 90% coupling ratio.Coupler 1 adopts 1310nm single mode list window coupler, and coupler 2 adopts 1550nm single mode list window coupler.After the light signal that coupler 1 or coupler 2 send the optical transceiver of 1310nm or 1550nm respectively is coupled, outputs to WDM wavelength division multiplexer 4 and carry out multiplexingly, and send out through the single fiber of 1310nm/1550nm.And the light signal that imports into from the 1310nm/1550nm single fiber, at first carry out wavelength-division through WDM wavelength division multiplexer 4, respectively according to 1310nm and 1550nm two-way dispensing coupler 1 or coupler 2, single mode list window coupling then, be distributed to the optical transceiver of 1310nm, 1550nm at last, make the optical transceiver of 1310nm, 1550nm receive the light signal of oneself.Adopt the mode of double wave single fiber can make four optical transceiver system capables carry out the optical transmission of four-way like this.
As shown in Figure 2, the operation principle of single fiber double wave four-way transmission converter is as follows: the transmission signal of system 1 (1310nm) enters STO-02-01 from T1.The signal that enters is divided into two-way through 1310nm (10: 90) single mode list window coupler, one road 1310nm wavelength input from the coupler to the wavelength division multiplexer, and another road enters R1 by coupler.First via signal attenuation value behind coupler is about 11db (this signal is useful to communication), and the attenuation value of the second road signal is not less than 55db (the directivity index that is decided by coupler, this signal are useless to communication).The 1310nm wavelength signals that enters wavelength division multiplexer also is divided into two-way, and one the road to single fiber port (COM), and another road is to the 1550nm wavelength port of wavelength division multiplexer.The first via to communication useful signal the insertion attenuation less than 1db, and the second the tunnel to communication unwanted signal attenuation be not less than 30db.The signal that arrives single fiber port (COM) is delivered to the single fiber port of opposite end by simple optical fiber.This signal arrives its 1310nm wavelength port and 1550nm wavelength port through the wavelength division multiplexer of opposite end, to the signal loss of 1310nm wavelength port less than 1db (this signal is useful to communication), and to the signal loss of 1550nm wavelength port greater than 30db (this signal is useless to communication).The 1310nm wavelength signals is divided into two-way again in 1310nm single mode list window coupler, one the tunnel arrives input (T1), another road arrives output (R1) and is received by the other end equipment of the I of system, the signal loss value that arrives input (T1) is about 11db (this signal is useless to communicating by letter), and the useful signal attenuation value of arrival output (R1) is not more than 1db.
The effect of adopting 10: 90 couplers except that guarantee signal from the T1 of A end to the R1 of B end, guarantee also that from A end T1 to the isolation that has the B end T1 greater than 20db, this is of great use to the laser of protecting two transmitting terminals.Though the light signal attenuation from an end T1 to the R1 of the other end about 12db, as long as omnidistance attenuation do not exceed requirement, many systems still can ensure normal operation.Equally, the signal of B end 1310nm wavelength is sent to the receiving terminal of A end 1310nm wavelength signals after by two ends 1310nm single mode list window coupler and WDM wavelength division multiplexer, finishes the single fiber bi-directional transmission of a wavelength signals.
As shown in Figure 4, the transmission signal of system 2 (1550nm) enters from T2, and the signal that enters is divided into two-way through 1550nm (10: 90) single mode list window coupler, one road 1550nm wavelength input from the coupler to the wavelength division multiplexer, another road by coupler to R2.First via useful signal attenuation value behind coupler is about 11db, and the attenuation value of the second road unwanted signal is not less than 55db (the directivity index that is decided by coupler).The signal that enters wavelength division multiplexer also is divided into two-way, and one the road to single fiber port (COM), and another road is to the 1310nm wavelength port of wavelength division multiplexer, and the insertion attenuation of first via useful signal is less than 1db, and the attenuation of the second road unwanted signal is not less than 30db.The signal that arrives single-ended port (COM) passes to the single fiber port of opposite end by simple optical fiber with the 1310nm signal.This signal arrives its 1310nm wavelength and 1550nm wavelength port through the wavelength division multiplexer of opposite end.To the useful signal attenuation of 1550 ports less than 1db, and to the unwanted signal attenuation of 1310nm port greater than 30db.The signal of 1550nm wavelength is divided into two-way again in 1550nm single mode list window coupler, the one tunnel arrives input (T2), and another road arrives output (R2) and received by the other end equipment of system 2.The unwanted signal attenuation value that arrives input (T2) is about 11db and the useful signal attenuation value that arrives output (R2) is not more than 1db.Adopt 10: 90 coupler effect except that guaranteeing that the T2 of signal from the A end delivers to the R2 of B end, guarantee also to hold the isolation that has the T2 greater than 20db to B that this is of great use to the laser of protecting two transmitting terminals from A end T2.Though the light signal attenuation from an end T2 to the R2 of the other end about 12db, as long as omnidistance attenuation do not exceed requirement, communication system still can ensure normal operation.Equally, the signal of B end 1550nm wavelength is sent to the receiving terminal of A end 1550nm wavelength signals after by two ends 1550nm single mode list window coupler and WDM wavelength division multiplexer, finishes the single fiber bi-directional transmission of another wavelength signals.
The performance index of single fiber double wave four-way transmission converter of the present utility model are as follows:
| Insert loss | 1310nm(T1→COM)＜11db(COM→ R1)＜1.5db 1550nm(T2→COM)＜11db(COM→R2)＜1db |
| Isolation | 1310nm (COM → T1) 〉=10db (a pair of) 〉=20db 1310nm (COM → T2) 〉=10db (a pair of) 〉=20db 1550nm (COM → T1) 〉=10db (a pair of) 〉=20db 1550nm (COM → T2) 〉=10db (a pair of) 〉=20db |
| The wavelength isolation | 1310nm(COM→R2)≥40db 1550nm(COM→R1)≥40db |
| The near-end isolation | 1310nm(T1→T2)≥55db 1550nm(T2→T1)≥55db |
| Directivity | 1310nm(T1→R1)≥55db 1310nm(T1→R2)≥55db 1550nm(T2→R1)≥55db 1550nm(T2→R2)≥55db |
| Return loss | 1310nm(T1)≥40db 1550nm(T2)≥40db 1310nm(COM)≥40db 1550nm(COM)≥40db |
As Fig. 5 YL port arrangements figure of the present utility model.
Claims (9)
1, a kind of single fiber double wave four-way transmission converter, be connected to the optical transceiver of mutual communication, it is characterized in that single fiber double wave four-way transmission converter divides two-way to transmit with two optical transceivers respectively, one the tunnel is to connect to send light source, one the tunnel receives light source, transmits by simple optical fiber connection carrying out communication between the single fiber double wave four-way transmission converter.
2, single fiber double wave four-way transmission converter according to claim 1, it is characterized in that described transducer is made up of wavelength division multiplexer and two couplers, each isolator is connected with receiving terminal with the light transmitting terminal of optical transceiver respectively, so that the transmission of optical transceiver, received signal process coupler and multiplexer connect the single fiber end again.
3, dual wavelength single fiber four-way transmission converter according to claim 2, it is characterized in that described isolator adopts 1310nm and 1550nm single mode list window coupler respectively, in three ports of this coupler, two ports are connected with receiving terminal with the transmitting terminal of optical transceiver, and the 3rd port is connected with wavelength division multiplexer.
4, single fiber double wave four-way transmission converter according to claim 3 is characterized in that described single mode list window coupler adopts photosynthetic or optical branching device, and light signal is input to the light transmitting terminal of optical transceiver and the optical transceiver optical receiving end of optical transceiver behind coupler.
5, single fiber double wave four-way transmission converter according to claim 4, it is characterized in that being divided into two-way after described optical transceiver 1310nm wavelength transmission signal enters single mode list window coupler, one the road is coupled to the 1310nm wavelength input of wavelength division multiplexer, and another road enters optical transceiver 1310nm wavelength receiving terminal through coupler.
6, single fiber double wave four-way transmission converter according to claim 5 is characterized in that the described signal loss 10% that is coupled to wavelength division multiplexer 1310nm wavelength input; Coupler enters the signal loss 90% of optical transceiver 1310nm wavelength receiving terminal.
7, single fiber double wave four-way transmission converter according to claim 4, it is characterized in that being divided into two-way after described optical transceiver 1550nm wavelength transmission signal enters single mode list window coupler, one the road is coupled to the 1550nm wavelength input of wavelength division multiplexer, and another road enters optical transceiver 1550nm wavelength receiving terminal through coupler.
8, single fiber double wave four-way transmission converter according to claim 7 is characterized in that the described signal loss 10% that is coupled to wavelength division multiplexer 1550nm wavelength input; Coupler enters the signal loss 90% of optical transceiver 1550nm wavelength receiving terminal.
9,, it is characterized in that described wavelength division multiplexer external connection end is connected with remote another wavelength division multiplexer communication by the 1310nm/1550nm single fiber according to claim 3 or 5 or 7 described single fiber double wave four-way transmission converters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU032742959U CN2636503Y (en) | 2003-09-04 | 2003-09-04 | Single fiber double wave four channel transmission converter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU032742959U CN2636503Y (en) | 2003-09-04 | 2003-09-04 | Single fiber double wave four channel transmission converter |
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| CN2636503Y true CN2636503Y (en) | 2004-08-25 |
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| CNU032742959U Expired - Fee Related CN2636503Y (en) | 2003-09-04 | 2003-09-04 | Single fiber double wave four channel transmission converter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104297851A (en) * | 2013-12-05 | 2015-01-21 | 中航光电科技股份有限公司 | Optical wavelength division multiplexer |
| CN104345413A (en) * | 2014-10-31 | 2015-02-11 | 连德伦 | Six-direction single-fiber transmission converter |
-
2003
- 2003-09-04 CN CNU032742959U patent/CN2636503Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104297851A (en) * | 2013-12-05 | 2015-01-21 | 中航光电科技股份有限公司 | Optical wavelength division multiplexer |
| CN104297851B (en) * | 2013-12-05 | 2017-06-27 | 中航光电科技股份有限公司 | Light wavelength division multiplexing |
| CN104345413A (en) * | 2014-10-31 | 2015-02-11 | 连德伦 | Six-direction single-fiber transmission converter |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |