Network node all-optical signal equalization compensator

Abstract

The application relates to a network node all-optical signal equalization compensator, which is suitable for the field of optical fiber networks and all-optical signal processing. The all-optical signal equalization compensator comprises a node optical signal (1), an adjustable 1*3 optical splitter (13), first, second and third 1*2 optical couplers (121), (122) and (123), first and second optical circulators (31) and (32), a wavelength selection switch (2), a pump light source (3), an adjustable optical attenuator (4), a dispersion compensation optical fiber (5), an erbium-doped optical fiber (6), first and second optical wavelength division multiplexers (21) and (22), first and second optical reflectors (11) and (12), first, second and third optical combiners (211), (212) and (213), and first and second optical filters (51) and (52). When the wavelength selection switch (2) is opened or closed, and the coupling ratios of the first output ports and the second output ports of the second and third 1*2 optical couplers (122) and (123) are adjusted at the same time, the equalization compensation of the node optical signal (1) can be realized.

Description

Technical Field

[0001] This invention relates to the fields of optical fiber communication and all-optical networks, and in particular to an all-optical signal equalization compensator for network nodes. Background Technology

[0002] With the rapid development of technologies such as wavelength division multiplexing (WDM), all-optical networks, and high-speed signal processing in fiber optic communication, long-distance, broadband, and high-speed signal transmission and processing services have been provided, stimulating a surge in demand for various multimedia and value-added services. However, due to differences in signal transmission distance, data format encoding methods, transmission link loss, and interference, signals arriving at network nodes exhibit significant variations in latency, power, and distortion. Traditionally, optical-to-electrical conversion is used at network nodes to convert the transmitted optical signals into electrical signals for processing, achieving signal equalization and compensation. However, the mismatch between the high-speed transmission of optical signals and the low-speed electrical processing at network nodes often leads to data conflicts and network congestion. Therefore, designing and implementing an all-optical signal equalization compensator can effectively solve the photoelectric conversion bottleneck at network nodes, further improve network performance, and promote the development of various new value-added services. Summary of the Invention

[0003] The technical problem to be solved by this invention is to overcome the shortcomings of existing network node signal processing methods and to propose an all-optical signal equalization compensator for network nodes.

[0004] The technical solution of the present invention:

[0005] A network node all-optical signal equalization compensator, characterized in that the all-optical signal equalization compensator comprises: a node optical signal, an adjustable 1×3 splitter, first, second, and third 1×2 optical couplers, first and second optical circulators, a wavelength selection switch, a pump source, an adjustable optical attenuator, a dispersion compensation fiber, an erbium-doped fiber, first and second optical wavelength division multiplexers, first and second optical mirrors, first, second, and third optical combiners, and first and second optical filters;

[0006] The connections of the various devices are as follows:

[0007] The node optical signal is connected to the input port of an adjustable 1×3 optical splitter. The first output port of the adjustable 1×3 optical splitter is connected to the input port of a first 1×2 optical coupler. The second output port of the adjustable 1×3 optical splitter is connected to the first input port of a first optical multiplexer. The third output port of the adjustable 1×3 optical splitter is connected to the first input port of a second optical multiplexer. The first output port of the first 1×2 optical coupler is connected to the first port of a first optical circulator. The second output port of the first 1×2 optical coupler is connected to the first port of a second optical circulator. The second port of the first optical circulator is connected to one end of a dispersion compensation fiber. The other end of the dispersion compensation fiber is connected to the output port of a first optical wavelength division multiplexer. The first input port of the first optical wavelength division multiplexer is connected to a first optical mirror. The second input port of the first optical wavelength division multiplexer is connected to the output port of an adjustable optical attenuator. The third port of the first optical circulator is connected to the input port of a second 1×2 optical coupler.

[0008] The second port of the second optical circulator is connected to the first port of the wavelength selection switch. The second port of the wavelength selection switch is connected to one end of the erbium-doped fiber. The other end of the erbium-doped fiber is connected to the output port of the second optical wavelength division multiplexer. The first input port of the second optical wavelength division multiplexer is connected to the second optical mirror. The second input port of the second optical wavelength division multiplexer is connected to the output port of the pump source. The third port of the wavelength selection switch is connected to the input port of the adjustable optical attenuator. The third port of the second optical circulator is connected to the input port of the third 1×2 optical coupler.

[0009] The first output port of the second 1×2 optical coupler is connected to the second input port of the first optical multiplexer, and the output port of the first optical multiplexer serves as the first output port of the entire all-optical signal equalization compensator.

[0010] The first output port of the third 1×2 optical coupler is connected to the second input port of the second optical multiplexer, and the output port of the second optical multiplexer serves as the second output port of the entire all-optical signal equalization compensator.

[0011] The second output port of the second 1×2 optical coupler is connected to the input port of the first optical filter, the output port of the first optical filter is connected to the first input port of the third optical combiner, the second output port of the third 1×2 optical coupler is connected to the input port of the second optical filter, the output port of the second optical filter is connected to the second input port of the third optical combiner, and the output port of the third optical combiner serves as the third output port of the entire all-optical signal equalization compensator.

[0012] The splitting ratio of the first output port, the second output port, and the third output port of the adjustable 1×3 beam splitter is 2:1:1;

[0013] The coupling ratio between the first output port and the second output port of the first 1×2 optical coupler is 1:1, and the coupling ratio between the first output port and the second output port of the second and third 1×2 optical couplers can be adjusted from 9:1 to 1:1.

[0014] When the wavelength selection switch is turned on or off, and the coupling ratio between the first output port and the second output port of the second and third 1×2 optical couplers (122) and (123) is adjusted, the time delay, power and distortion between the signals of the first, second and third output ports of the entire all-optical signal equalization compensator can be changed, thereby realizing the equalization compensation of the node optical signal. Attached Figure Description

[0015] Figure 1 Network node all-optical signal equalizer. Implementation

[0016] The present invention will now be further described with reference to the accompanying drawings.

[0017] like Figure 1 A network node all-optical signal equalization compensator, characterized in that the all-optical signal equalization compensator includes: a node optical signal 1, an adjustable 1×3 beam splitter 13, first, second, and third 1×2 optical couplers 121, 122, and 123, first and second optical circulators 31 and 32, a wavelength selection switch 2, a pump light source 3, an adjustable optical attenuator 4, a dispersion compensation fiber 5, an erbium-doped fiber 6, first and second optical wavelength division multiplexers 21 and 22, first and second optical mirrors 11 and 12, first, second, and third optical combiners 211, 212, and 213, and first and second optical filters 51 and 52;

[0018] The connections of the various devices are as follows:

[0019] The node optical signal 1 is connected to the input port of the adjustable 1×3 beam splitter 13. The first output port of the adjustable 1×3 beam splitter 13 is connected to the input port of the first 1×2 optical coupler 121. The second output port of the adjustable 1×3 beam splitter 13 is connected to the first input port of the first optical multiplexer 211. The third output port of the adjustable 1×3 beam splitter 13 is connected to the first input port of the second optical multiplexer 212. The first output port of the first 1×2 optical coupler 121 is connected to the first port of the first optical circulator 31. The second output port of coupler 121 is connected to the first port of the second optical circulator 32; the second port of the first optical circulator 31 is connected to one end of the dispersion compensation fiber 5, the other end of the dispersion compensation fiber 5 is connected to the output port of the first optical wavelength division multiplexer 21, the first input port of the first optical wavelength division multiplexer 21 is connected to the first optical reflector 11, the second input port of the first optical wavelength division multiplexer 21 is connected to the output port of the adjustable optical attenuator 4, and the third port of the first optical circulator 31 is connected to the input port of the second 1×2 optical coupler 122.

[0020] The second port of the second optical circulator 32 is connected to the first port of the wavelength selection switch 2. The second port of the wavelength selection switch 2 is connected to one end of the erbium-doped fiber 6. The other end of the erbium-doped fiber 6 is connected to the output port of the second optical wavelength division multiplexer 22. The first input port of the second optical wavelength division multiplexer 22 is connected to the second optical mirror 12. The second input port of the second optical wavelength division multiplexer 22 is connected to the output port of the pump light source 3. The third port of the wavelength selection switch 2 is connected to the input port of the adjustable optical attenuator 4. The third port of the second optical circulator 32 is connected to the input port of the third 1×2 optical coupler 123.

[0021] The first output port of the second 1×2 optical coupler 122 is connected to the second input port of the first optical multiplexer 211, and the output port of the first optical multiplexer 211 serves as the first output port of the entire all-optical signal equalization compensator.

[0022] The first output port of the third 1×2 optical coupler 123 is connected to the second input port of the second optical multiplexer 212, and the output port of the second optical multiplexer 212 serves as the second output port of the entire all-optical signal equalization compensator.

[0023] The second output port of the second 1×2 optical coupler 122 is connected to the input port of the first optical filter 51. The output port of the first optical filter 51 is connected to the first input port of the third optical combiner 213. The second output port of the third 1×2 optical coupler 123 is connected to the input port of the second optical filter 52. The output port of the second optical filter 52 is connected to the second input port of the third optical combiner 213. The output port of the third optical combiner 213 serves as the third output port of the entire all-optical signal equalization compensator.

[0024] The splitting ratio of the first output port, the second output port, and the third output port of the adjustable 1×3 beam splitter 13 is 2:1:1;

[0025] The coupling ratio between the first output port and the second output port of the first 1×2 optical coupler 121 is 1:1, and the coupling ratio between the first output port and the second output port of the second and third 1×2 optical couplers 122 and 123 can be adjusted from 9:1 to 1:1.

[0026] When the wavelength selection switch 2 is turned on or off, and the coupling ratio between the first and second output ports of the second and third 1×2 optical couplers 122 and 123 is adjusted, the time delay, power and distortion between the signals of the first, second and third output ports of the entire all-optical signal equalization compensator can be changed, thereby achieving equalization compensation of the node optical signal 1.

Claims

1. A network node all-optical signal equalizer, characterized in that, The all-optical signal equalization compensator includes: a node optical signal (1), an adjustable 1×3 beam splitter (13), first, second, and third 1×2 optical couplers (121), (122), and (123), first and second optical circulators (31) and (32), a wavelength selection switch (2), a pump source (3), an adjustable optical attenuator (4), a dispersion compensation fiber (5), an erbium-doped fiber (6), first and second optical wavelength division multiplexers (21) and (22), first and second optical mirrors (11) and (12), first, second, and third optical combiners (211), (212), and (213), and first and second optical filters (51) and (52). The connections for each component are as follows: The node optical signal (1) is connected to the input port of the adjustable 1×3 beam splitter (13). The first output port of the adjustable 1×3 beam splitter (13) is connected to the input port of the first 1×2 optical coupler (121). The second output port of the adjustable 1×3 beam splitter (13) is connected to the first input port of the first optical multiplexer (211). The third output port of the adjustable 1×3 beam splitter (13) is connected to the first input port of the second optical multiplexer (212). The first output port of the first 1×2 optical coupler (121) is connected to the first port of the first optical circulator (31). The second output port of the first optical circulator (121) is connected to the first port of the second optical circulator (32); the second port of the first optical circulator (31) is connected to one end of the dispersion compensation fiber (5), the other end of the dispersion compensation fiber (5) is connected to the output port of the first optical wavelength division multiplexer (21), the first input port of the first optical wavelength division multiplexer (21) is connected to the first optical mirror (11), the second input port of the first optical wavelength division multiplexer (21) is connected to the output port of the adjustable optical attenuator (4), and the third port of the first optical circulator (31) is connected to the input port of the second 1×2 optical coupler (122); The second port of the second optical circulator (32) is connected to the first port of the wavelength-selective optical switch (2), the second port of the wavelength-selective optical switch (2) is connected to one end of the erbium-doped fiber (6), the other end of the erbium-doped fiber (6) is connected to the output port of the second optical wavelength division multiplexer (22), the first input port of the second optical wavelength division multiplexer (22) is connected to the second optical mirror (12), the second input port of the second optical wavelength division multiplexer (22) is connected to the output port of the pump light source (3), the third port of the wavelength-selective optical switch (2) is connected to the input port of the adjustable optical attenuator (4), and the third port of the second optical circulator (32) is connected to the input port of the third 1×2 optical coupler (123). The first output port of the second 1×2 optical coupler (122) is connected to the second input port of the first optical combiner (211), and the output port of the first optical combiner (211) serves as the first output port of the entire all-optical signal equalization compensator. The first output port of the third 1×2 optical coupler (123) is connected to the second input port of the second optical combiner (212), and the output port of the second optical combiner (212) serves as the second output port of the entire all-optical signal equalization compensator. The second output port of the second 1×2 optical coupler (122) is connected to the input port of the first optical filter (51). The output port of the first optical filter (51) is connected to the first input port of the third optical combiner (213). The second output port of the third 1×2 optical coupler (123) is connected to the input port of the second optical filter (52). The output port of the second optical filter (52) is connected to the second input port of the third optical combiner (213). The output port of the third optical combiner (213) serves as the third output port of the entire all-optical signal equalization compensator.

2. The network node all-optical signal equalizer compensator according to claim 1, characterized in that: The splitting ratio of the first output port, the second output port, and the third output port of the adjustable 1×3 beam splitter (13) is 2:1:

1.

3. The network node all-optical signal equalizer compensator according to claim 1, characterized in that: The coupling ratio between the first output port and the second output port of the first 1×2 optical coupler (121) is 1:1, and the coupling ratio between the first output port and the second output port of the second and third 1×2 optical couplers (122) and (123) can be adjusted from 9:1 to 1:

1.

4. The network node all-optical signal equalizer according to claim 1, characterized in that: When the wavelength selection switch (2) is turned on or off, and the coupling ratio between the first output port and the second output port of the second and third 1×2 optical couplers (122) and (123) is adjusted, the time delay, power and distortion between the signals of the first, second and third output ports of the entire all-optical signal equalization compensator can be changed, thereby realizing the equalization compensation of the node optical signal (1).

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