CN2636505Y - Isolating coupling single fiber double wave four channel transmission inverter - Google Patents
Isolating coupling single fiber double wave four channel transmission inverter Download PDFInfo
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- CN2636505Y CN2636505Y CNU032743076U CN03274307U CN2636505Y CN 2636505 Y CN2636505 Y CN 2636505Y CN U032743076 U CNU032743076 U CN U032743076U CN 03274307 U CN03274307 U CN 03274307U CN 2636505 Y CN2636505 Y CN 2636505Y
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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 and is connected with two intercommunicated optical transmitters and receives 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. These two dual-wavelength single-fiber four-way transmission converter are connected through one single fiber to realize communication transmission. The utility model is characterized in that the converter is composed of a wavelength division multiplexer, two couplers and two isolators. Each isolator is connected between a transmitting terminal of the optical transmitter and receiver and the coupler in series to make signals transmitted by the optical transmitter and receiver through the isolator, the coupler and the multiplexer and then connected with one terminal of the single fiber. Compared with prior arts, the utility model has the advantages of four-way signal transmission on a single 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 isolation coupling 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.
Isolation coupling 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, transmit by simple optical fiber connection carrying out communication between the single fiber double wave four-way transmission converter, it is characterized in that described transducer is made up of wavelength division multiplexer and two couplers and two isolators, each isolator is serially connected with between the light transmitting terminal and coupler of optical transceiver, so that the transmission signal of optical transceiver is through isolator, coupler and multiplexer connect the single fiber end again.
Isolator described in the utility model adopts 1310nm and 1550nm single-stage isolator respectively, and 1310nm single-stage isolator is serially connected with between the light transmitting terminal and 1310nm coupler of 1310nm optical transceiver; 1550nm single-stage isolator is serially connected with between the light transmitting terminal and 1550nm coupler of 1550nm optical transceiver.Described 1310nm sends signal and enters single fiber double wave four-way transmission converter from T1, the signal that enters is divided into two-way through 1310nm single-stage isolator and single mode list window coupler, one road 1310nm wavelength input from the coupler to the wavelength division multiplexer, another road enters R1 by coupler.Described first via signal is about 3db through the laggard attenuation value of going into wavelength division multiplexer of 1310nm isolator and 1310nm coupler, is not less than 55db and the second road signal enters the attenuation value of R1.The 1310nm wavelength signals that enters wavelength division multiplexer also is divided into two-way, and one the road to the single fiber port, and another road is to the 1550nm wavelength port of wavelength division multiplexer.Less than 1db, and the second tunnel attenuation to the communication unwanted signal is not less than 30db to the described first via to the insertion attenuation of communication useful signal, and the signal that arrives the single fiber port is delivered to the single fiber port of opposite end by the 1310nm/1550nm simple optical fiber.
1550nm described in the utility model sends signal and enters single fiber double wave four-way transmission converter from T2, the signal that enters is divided into two-way through 1550nm single-stage isolator and single mode list window coupler, one road 1550nm wavelength input from the coupler to the wavelength division multiplexer, another road enters R2 by coupler.Described first via signal is about 3db through the laggard attenuation value of going into wavelength division multiplexer of 1550nm isolator and coupler, is not less than 55db and the second road signal enters the attenuation value of R1.The 1550nm wavelength signals that enters wavelength division multiplexer also is divided into two-way, and one the road to the single fiber port, and another road is to the 1310nm wavelength port of wavelength division multiplexer.Less than 1db, and the second tunnel attenuation to the communication unwanted signal is not less than 30db to the first via to the insertion attenuation of communication useful signal, and the signal that arrives the single fiber port is delivered to the single fiber port of opposite end by the 1310nm/1550nm simple optical 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, isolation coupling 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.Isolation coupling single fiber double wave four-way transmission converter is made up of 1310nm single mode list window coupler, 1550nm single mode list window coupler, 1310nm single-stage isolator, 1550nm single-stage isolator 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 FC/APC type connector, all the other 4 ports all adopted FC/UPC type connector.ST0-02-04 isolation coupling 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, the transmission signal of system 1 (1310nm) enters the utility model from T1.The signal that enters is divided into two-way through 1310nm single-stage isolator and 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 isolator and coupler is about 3db (this signal is useful to communicating by letter), 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) behind isolator, 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 not less than 30db (this signal is useless to communicating by letter), and the useful signal attenuation value of arrival output (R1) is not more than 1db.
The transmission signal of system 2 (1550nm) enters the utility model from T2.The signal that enters is divided into two-way behind 1550nm single-stage isolator and 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 3db, 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) behind isolator, 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 not less than 30db, and the useful signal attenuation value of arrival output (R2) is not more than 1db.
As shown in Figure 3, the effect of adopting isolator 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 40db, 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 8db, 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 isolator and 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 effect of adopting the 1550nm isolator also guarantees to hold T2 to the isolation that has the B end T2 greater than 40db from A except that guaranteeing that the T2 of signal from the A end delivers to the R2 of B end, and this is of great use to the laser of protecting two transmitting terminals.Though the light signal attenuation from an end T2 to the R2 of the other end about 8db, 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 1550nm isolator and 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 isolation coupling single fiber double wave four-way transmission converter are as follows:
| Insert loss | 1310nm(T1→COM)＜4db (COM→R1)＜4db 1550nm(T2→COM)＜4db (COM→R2)＜4db |
| Isolation | 1310nm (COM → T1) 〉=36db (a pair of) 〉=40db 1310nm (COM → T2) 〉=36db (a pair of) 〉=40db 1550nm (COM → T1) 〉=36db (a pair of) 〉=40db 1550nm (COM → T2) 〉=36db (a pair of) 〉=40db |
| 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)≥50db 1550nm(T2)≥50db 1310nm(COM)≥50db 1550nm(COM)≥50db |
As Fig. 5 is port arrangements figure of the present utility model.
Claims (10)
1, a kind of isolation coupling single fiber double wave four-way transmission converter, be 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, transmit by simple optical fiber connection carrying out communication between the single fiber double wave four-way transmission converter, it is characterized in that described transducer is made up of wavelength division multiplexer and two couplers and two isolators, each isolator is serially connected with between the light transmitting terminal and coupler of optical transceiver, so that the transmission signal of optical transceiver is through isolator, coupler and multiplexer connect the single fiber end again.
2, isolation coupling single fiber double wave four-way transmission converter according to claim 1, it is characterized in that described isolator adopts 1310nm and 1550nm single-stage isolator respectively, 1310nm single-stage isolator is serially connected with between the light transmitting terminal and 1310nm coupler of 1310nm optical transceiver; 1550nm single-stage isolator is serially connected with between the light transmitting terminal and 1550nm coupler of 1550nm optical transceiver.
3, isolation coupling single fiber double wave four-way transmission converter according to claim 2, it is characterized in that described 1310nm sends signal and enters single fiber double wave four-way transmission converter from T1, the signal that enters is divided into two-way through 1310nm single-stage isolator and single mode list window coupler, one road 1310nm wavelength input from the coupler to the wavelength division multiplexer, another road enters R1 by coupler.
4, isolation coupling single fiber double wave four-way transmission converter according to claim 3, it is characterized in that described first via signal is about 3db through the laggard attenuation value of going into wavelength division multiplexer of 1310nm isolator and 1310nm coupler, is not less than 55db and the second road signal enters the attenuation value of R1.
5, isolation coupling single fiber double wave four-way transmission converter according to claim 4, it is characterized in that the described 1310nm wavelength signals that enters wavelength division multiplexer also is divided into two-way, one the road to the single fiber port, and another road is to the 1550nm wavelength port of wavelength division multiplexer.
6, isolation coupling single fiber double wave four-way transmission converter according to claim 5, it is characterized in that the described first via to communication useful signal the insertion attenuation less than 1db, and the second tunnel attenuation to the communication unwanted signal is not less than 30db, and the signal that arrives the single fiber port is delivered to the single fiber port of opposite end by the 1310nm/1550nm simple optical fiber.
7, isolation coupling single fiber double wave four-way transmission converter according to claim 2, it is characterized in that described 1550nm sends signal and enters single fiber double wave four-way transmission converter from T2, the signal that enters is divided into two-way through 1550nm single-stage isolator and single mode list window coupler, one road 1550nm wavelength input from the coupler to the wavelength division multiplexer, another road enters R2 by coupler.
8, isolation coupling single fiber double wave four-way transmission converter according to claim 7, it is characterized in that described first via signal is about 3db through the laggard attenuation value of going into wavelength division multiplexer of 1550nm isolator and coupler, is not less than 55db and the second road signal enters the attenuation value of R1.
9, isolation coupling single fiber double wave four-way transmission converter according to claim 8 is characterized in that the described 1550nm wavelength signals that enters wavelength division multiplexer also is divided into two-way, and one the road to the single fiber port, and another road is to the 1310nm wavelength port of wavelength division multiplexer.
10, isolation coupling single fiber double wave four-way transmission converter according to claim 9, it is characterized in that the described first via to communication useful signal the insertion attenuation less than 1db, and the second tunnel attenuation to the communication unwanted signal is not less than 30db, and the signal that arrives the single fiber port is delivered to the single fiber port of opposite end by the 1310nm/1550nm simple optical fiber.
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| Application Number | Priority Date | Filing Date | Title |
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| CNU032743076U CN2636505Y (en) | 2003-09-04 | 2003-09-04 | Isolating coupling single fiber double wave four channel transmission inverter |
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| Application Number | Priority Date | Filing Date | Title |
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| CNU032743076U CN2636505Y (en) | 2003-09-04 | 2003-09-04 | Isolating coupling single fiber double wave four channel transmission inverter |
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| CN2636505Y true CN2636505Y (en) | 2004-08-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112929123A (en) * | 2019-12-06 | 2021-06-08 | 中国电信股份有限公司 | Optical transmission system, method and optical communication system |
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2003
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112929123A (en) * | 2019-12-06 | 2021-06-08 | 中国电信股份有限公司 | Optical transmission system, method and optical communication system |
| CN112929123B (en) * | 2019-12-06 | 2023-05-02 | 中国电信股份有限公司 | Optical transmission system, method and optical communication system |
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| CF01 | Termination of patent right due to non-payment of annual fee |