CN205249234U - Multiplexing light transmission line of single fiber multiplexer and single fiber - Google Patents
Multiplexing light transmission line of single fiber multiplexer and single fiber Download PDFInfo
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- CN205249234U CN205249234U CN201521086143.5U CN201521086143U CN205249234U CN 205249234 U CN205249234 U CN 205249234U CN 201521086143 U CN201521086143 U CN 201521086143U CN 205249234 U CN205249234 U CN 205249234U
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 72
- 239000000835 fiber Substances 0.000 title claims abstract description 67
- 230000003287 optical effect Effects 0.000 claims abstract description 179
- 239000013307 optical fiber Substances 0.000 claims abstract description 57
- 238000004891 communication Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 description 8
- 230000005611 electricity Effects 0.000 description 4
- 230000003321 amplification Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
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Abstract
The utility model discloses a multiplexing light transmission line of single fiber multiplexer and single fiber relates to the fiber communication technique, aims at providing an applied environment that satisfies the optical input light yield to can realize single fiber long distance transmission's single fiber multiplexer. The utility model discloses the technical essential: including an optical filter, the 2nd optical filter, wavelength converter and long distance transmission optical fiber access point, an optical filter's input is used for receiving the light signal, an optical filter's output passes through optic fibre and long distance transmission optical fiber access point connection, the 2nd optical filter's input and long distance transmission optical fiber access point connection, the 2nd optical filter's output passes through optic fibre and is connected with the input of wavelength converter, the output of wavelength converter is used for exporting the light signal.
Description
Technical field
The utility model relates to Fibre Optical Communication Technology, relates in particular to a kind of single fiber multiplexer.
Background technology
Referring to Fig. 1, existing a kind of single fiber multiplexer is realized by optical circulator. The optical signal that wavelength of transmitting terminal input is 1310nm is to the first optical circulator place, after optical signal enters the first optical circulator A input, the first optical circulator outputs to this 1310nm optical signal in Transmission Fibers from the output B of the first optical circulator by inner faraday light revolving mirror, after optical fibre transmission, be sent to the second optical circulator input C place, after optical signal enters the second optical circulator input C, this 1310nm optical signal is delivered to the output of the second optical circulator output D place by the faraday light revolving mirror of the second optical circulator inside.
Otherwise, input a 1310nm optical signal to the second optical circulator E place by transmitting terminal, after optical signal enters the second optical circulator input, the faraday light revolving mirror of the second optical circulator inside is delivered to the second optical circulator output C place by this 1310nm optical signal and is outputed in Transmission Fibers, be sent to the first optical circulator input B place through optical fibre transmission, after optical signal enters the first optical circulator, this 1310nm optical signal is delivered to the output of the first optical circulator transmitting terminal delivery outlet F place by the faraday light revolving mirror of the first optical circulator inside.
The first optical circulator, the second optical circulator, input/output terminal, comprise the optical signal that is all 1310nm of transmitted in both directions on single fiber.
But, the optical signal of two-way transmission Same Wavelength simultaneously on same optical fiber, its limited transmission distance, can only transmission in 10km, once exceed this transmission range, transmission line will produce near-end cross, has a strong impact on the signal to noise ratio of gauze. Meanwhile, once Transmission Fibers is interrupted, the reverberation focus ring shape device interior lights device of optical circulator inside can cause serious damage.
Referring to Fig. 2, existing another kind of single fiber multiplexer is such, the signal of telecommunication is inputted behind the transmitting terminal A place of the first electric terminal and is become optical signal λ 1 through the conversion of electricity/light, optical signal λ 1 is sent on transmission simple optical fiber from optical transmitter and receiver output C through light amplification (according to transmission range selective light power) after entering the input B place of the first optical transmitter and receiver, be transferred in the second optical transmitter and receiver input D place of opposite end through single fiber, this optical signal λ 1 is sent to the second electric terminal transmitting terminal E place by the second optical transmitter and receiver, through light/electricity, conversion is reduced into the original signal of telecommunication again in the second electric terminal inside.
Conversely, the signal of telecommunication is inputted into the G place of the second electric terminal transmitting terminal, after the conversion of electricity/light, become optical signal λ 1, after optical signal λ 1 enters the second optical transmitter and receiver input E and goes out, become optical signal λ 2 after light amplification and wavelength conversion after, be sent on transmission simple optical fiber by the D place of the second optical transmitter and receiver, after single fiber transmission, enter into the first optical transmitter and receiver input C place, optical signal λ 2 enters the first optical transmitter and receiver, and through wavelength, optical signal λ 2 is become λ 1 by conversion, this λ 1 optical signal is sent to the first electric terminal by the first optical transmitter and receiver, optical signal λ 1 enters the first electric terminal and after the conversion of light/electricity, is reduced into the original signal of telecommunication and is exported by H place.
For this single fiber multiplexer, because input is the signal of telecommunication, and optical fibre transmission is optical signal, so need to convert the electrical signal to optical signal. For receiving terminal, its output is the signal of telecommunication, and optical fibre transmission is optical signal, therefore optical signal need to be transformed into the signal of telecommunication, finally can not meet light input directly to the applied environment of light output.
Utility model content
Goal of the invention of the present utility model is: the defect that can not realize the defect of long distance line transmission and current optical module and can not meet the applied environment of light input light output for current optical circulator, a kind of applied environment that meets the output of light input light is provided, and can realizes the single fiber multiplexer of the long Distance Transmission of single fiber.
The technical solution adopted in the utility model is such: comprise the first optical filter, the second optical filter, wavelength shifter and long Distance Transmission optical fiber access point; The input of described the first optical filter is for receiving optical signals; The output of described the first smooth filtering is connected with long Distance Transmission optical fiber access point by optical fiber; The input of described the second optical filter is connected with long Distance Transmission optical fiber access point; The output of described the second optical filter is connected with the input of wavelength shifter by optical fiber; The output of wavelength shifter is for output optical signal.
The wavelength of the optical signal that further, the first optical filter can pass through is λ 1; The wavelength of the optical signal that the second optical filter can pass through is λ 2; λ 1 ≠ λ 2.
Further, to be converted to wavelength for the optical signal that is λ 2 by wavelength be the optical signal of λ 1 and for being that the optical signal of λ 1 is converted to the optical signal that wavelength is λ 2 by wavelength to described wavelength shifter.
The utility model also provides a kind of single fiber multiplexed optical transmission line, comprises two aforesaid single fiber multiplexers, two light devices and long Distance Transmission optical fiber;
Described light device is used for converting electrical signals to optical signal and for being converted to the signal of telecommunication from optical signal;
The output of the first light device is connected with the input of the first optical filter in the first single fiber multiplexer; The input of the first light device is connected with the output of the first single fiber multiplexer medium wavelength converter;
The output of the second light device is connected with the input of the second single fiber multiplexer medium wavelength converter; The input of the second light device is connected with the output of the first optical filter in the second single fiber multiplexer;
Wherein, the long Distance Transmission optical fiber access point of the first single fiber multiplexer is connected with one end of long Distance Transmission optical fiber, and the long Distance Transmission optical fiber access point of the second single fiber multiplexer is connected with the other end of long Distance Transmission optical fiber.
In sum, owing to having adopted technique scheme, the beneficial effects of the utility model are:
The optical signal of 1, the input of the single fiber multiplexer in the utility model, two kinds of different wave lengths of output, make the wavelength of optical signal difference of transmitted in both directions on optical fiber, circuit is difficult for producing crosstalks, and optical signal can transmit over long distances, has strengthened standby realizability and the practicality of single fiber drop multiplexer apparatus.
2, the utility model directly access, output optical signal, can be applicable to light input directly to the applied environment of light output.
Brief description of the drawings
Fig. 1 is the existing single fiber multiplexed optical of the first transmission link.
Fig. 2 is the existing single fiber multiplexed optical of the second transmission link.
Fig. 3 is the single fiber multiplexer in the utility model.
Fig. 4 is the single fiber multiplexed optical transmission link in the utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in detail.
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated. Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
As shown in Figure 3, the single fiber multiplexer that the utility model provides comprises optical filter C, optical filter E, wavelength shifter F and long Distance Transmission optical fiber access point R.
The input of described optical filter C is used for from extraneous receiving optical signals; The output of described optical filter C is connected with long Distance Transmission optical fiber access point R by optical fiber. The input of described optical filter E is connected with long Distance Transmission optical fiber access point R; The output of described optical filter E is connected with the input of wavelength shifter F by optical fiber; The output of wavelength shifter F is for external output optical signal.
Wherein, it is the optical signal of λ 1 that optical filter C can only see through wavelength, it is the optical signal of λ 2 that optical filter E can only see through wavelength, wavelength shifter can transmitted in both directions optical signal, it is the conversion of λ 1 to wavelength X 2 from wavelength that one of them direction realizes optical signal, and another direction realizes the conversion of optical signal from wavelength X 2 to wavelength X 1. λ 1 ≠ λ 2.
It should be noted that the long Distance Transmission optical fiber in the utility model is for the optical fiber of single fiber multiplexer inside, to show difference. In a specific embodiment, long Distance Transmission optical fiber access point is the fusion point of three optical fiber branch roads.
Below the principle of single fiber multiplexer both direction transmitting optical signal of the present utility model is described.
First direction
Wavelength is the input that the optical signal of λ 1 enters optical filter C, wavelength is that the optical signal of λ 1 outputs to long Distance Transmission optical fiber access point R through optical filter C from its output, be the optical signal of λ 2 because optical filter E can only see through wavelength, therefore wavelength is that the optical signal of λ 1 can only be from long Distance Transmission optical fiber access point R output.
The optical signal that is λ 2 from the wavelength of long Distance Transmission optical fiber access point R access can only see through optical filter E, and can not see through optical filter C, at wavelength shifter F place, when wavelength is the optical signal of λ 2 during from the incident of optical filter E direction, the optical signal that wavelength shifter F is λ 2 by wavelength is converted to the optical signal that wavelength is λ 1.
Second direction
Wavelength is that the input that the optical signal of λ 1 enters wavelength shifter F enters, and when the optical signal that is λ 1 when wavelength at wavelength shifter F place enters from the external world, the optical signal that wavelength shifter F is λ 1 by wavelength is converted to the optical signal that wavelength is λ 2. Wavelength is that the optical signal of λ 2 outputs to long Distance Transmission optical fiber access point R through optical filter E from its output, be the optical signal of λ 1 because optical filter C can only see through wavelength, therefore wavelength is that the optical signal of λ 2 can only be from long Distance Transmission optical fiber access point R output.
The optical signal that is λ 1 from the wavelength of long Distance Transmission optical fiber access point R access can only see through optical filter C and output to the external world.
The present invention also provides a kind of single fiber multiplexed optical transmission line, comprises two aforesaid single fiber multiplexers, two light devices and long Distance Transmission optical fiber.
Described light device is used for converting electrical signals to optical signal and for being converted to the signal of telecommunication from optical signal.
The output of light device A is connected with the input of optical filter C in single fiber multiplexer M; The input of light device A is connected with the output of M single fiber multiplexer medium wavelength converter F.
The output of light device B is connected with the input of single fiber multiplexer N medium wavelength converter G; The input of light device B is connected with the output of optical filter D in single fiber multiplexer N.
The long Distance Transmission optical fiber access point R of single fiber multiplexer M is connected with one end of long Distance Transmission optical fiber, and the long Distance Transmission optical fiber access point K of single fiber multiplexer N is connected with the other end of long Distance Transmission optical fiber.
While transmitted in both directions two ways of optical signals on long Distance Transmission optical fiber, wherein a road wavelength of optical signal is λ 1, the wavelength of another road optical signal is λ 2.
Below the principle of single fiber multiplexed optical transmission link both direction transmitting optical signal of the present utility model is described.
First direction
Light device A is the optical signal of λ 1 to the input output wavelength of the optical filter C of single fiber multiplexer M, wavelength is that the optical signal of λ 1 outputs to long Distance Transmission optical fiber access point R through optical filter C from its output, then arrives single fiber multiplexer N place through long Distance Transmission optical fibre transmission.
Wavelength is that the optical signal of λ 1 enters from the long Distance Transmission optical fiber access point K of single fiber multiplexer N, sees through optical filter D and outputs in light device B.
Second direction
The optical signal that light device B is λ 1 by wavelength is input to the input of the wavelength shifter G of single fiber multiplexer N, and the optical signal that wavelength shifter G is λ 1 by wavelength is converted to the optical signal that wavelength is λ 2. Wavelength is that the optical signal of λ 2 outputs to long Distance Transmission optical fiber access point K through optical filter H from its output, then arrives single fiber multiplexer M place through long Distance Transmission optical fibre transmission.
Wavelength is the optical filter E that the optical signal of λ 2 sees through single fiber multiplexer M, and the optical signal that wavelength shifter F is λ 2 by wavelength outputs in light device A after being converted to the optical signal that wavelength is λ 1.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any amendments of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.
Claims (4)
1. a single fiber multiplexer, is characterized in that, comprises the first optical filter, the second optical filter, wavelength shifter and long Distance Transmission optical fiber access point; The input of described the first optical filter is for incoming light signal; The output of described the first optical filter is connected with long Distance Transmission optical fiber access point by optical fiber; The input of described the second optical filter is connected with long Distance Transmission optical fiber access point; The output of described the second optical filter is connected with the input of wavelength shifter by optical fiber; The output of wavelength shifter is for output optical signal.
2. according to a kind of single fiber multiplexer described in special claim 1, it is characterized in that, the wavelength of the optical signal that the first optical filter can pass through is λ 1; The wavelength of the optical signal that the second optical filter can pass through is λ 2; λ 1 ≠ λ 2.
3. according to a kind of single fiber multiplexer described in special claim 2, it is characterized in that, it is the optical signal of λ 1 and for being that the optical signal of λ 1 is converted to the optical signal that wavelength is λ 2 by wavelength that described wavelength shifter is converted to wavelength for the optical signal that is λ 2 by wavelength.
4. a single fiber multiplexed optical transmission line, is characterized in that, comprises the single fiber multiplexer described in any one in two special claims 1 ~ 3, two light devices and long Distance Transmission optical fiber;
Described light device is used for converting electrical signals to optical signal and for being converted to the signal of telecommunication from optical signal;
The output of the first light device is connected with the input of the first optical filter in the first single fiber multiplexer; The input of the first light device is connected with the output of the first single fiber multiplexer medium wavelength converter;
The output of the second light device is connected with the input of the second single fiber multiplexer medium wavelength converter; The input of the second light device is connected with the output of the first optical filter in the second single fiber multiplexer;
Wherein, the long Distance Transmission optical fiber access point of the first single fiber multiplexer is connected with one end of long Distance Transmission optical fiber, and the long Distance Transmission optical fiber access point of the second single fiber multiplexer is connected with the other end of long Distance Transmission optical fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521086143.5U CN205249234U (en) | 2015-12-24 | 2015-12-24 | Multiplexing light transmission line of single fiber multiplexer and single fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521086143.5U CN205249234U (en) | 2015-12-24 | 2015-12-24 | Multiplexing light transmission line of single fiber multiplexer and single fiber |
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| Publication Number | Publication Date |
|---|---|
| CN205249234U true CN205249234U (en) | 2016-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201521086143.5U Active CN205249234U (en) | 2015-12-24 | 2015-12-24 | Multiplexing light transmission line of single fiber multiplexer and single fiber |
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| Country | Link |
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| CN (1) | CN205249234U (en) |
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- 2015-12-24 CN CN201521086143.5U patent/CN205249234U/en active Active
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