An optical cross-line device supporting optical multiplexing section protection function

Abstract

An optical cross-line device supporting an optical multiplexing section protection function includes a wavelength selection switch, an optical switch, a first optical amplifying unit, and a second optical amplifying unit; the internal output ports of the first optical amplifying unit and the second optical amplifying unit are both connected to the input port of the optical switch, the internal input ports of the first optical amplifying unit and the second optical amplifying unit are both connected to the output port of the optical switch, the internal output port of the wavelength selection switch is connected to the input port of the optical switch, and the internal input port of the wavelength selection switch is connected to the output port of the optical switch. The device is combined and used in different nodes to realize the protection function of two groups of two-fiber bidirectional optical multiplexing sections, and can be widely used in commonly existing working scenarios and optical cross-networking scenarios when the attenuation of the protection line is greatly different.

Description

Technical Field

[0001] The invention relates to the field of physics, in particular to optical communication technology, and specifically to an optical cross-line device supporting an optical multiplexing section protection function. Background Art

[0002] At present, optical cross-connection equipment based on wavelength selective switch WSS and optical backplane has been widely used. Among them, optical backplane generally adopts optical fiber weaving technology to realize optical cross-connection; wavelength selective switch can play a role in routing specific wavelength signals based on wavelength screening and optical switch functions. However, the above optical cross-connection equipment lacks protection capabilities for the combined signal output on the line side, and requires external protection devices to realize optical line protection or optical multiplexing section protection when used; the protection strategy of other devices is only for channel protection at the unidirectional service level, lacking an overall protection mechanism for the combined signal on the line side, and the security of its networking is greatly limited. Summary of the invention

[0003] The object of the present invention is to provide an optical cross-line device supporting optical multiplexing section protection function, which is intended to solve the technical problem that the optical cross-line device in the prior art lacks the ability to protect the combined wave signal output on the line side.

[0004] The invention discloses an optical cross-line device supporting an optical multiplex section protection function, comprising a wavelength selective switch, an optical switch, a first optical amplifying unit and a second optical amplifying unit; the first optical amplifying unit and the second optical amplifying unit respectively comprise an external input port, an external output port, an internal input port and an internal output port, the optical switch comprises an input port and an output port, and the wavelength selective switch comprises an internal input port, an internal output port, at least one external input port and at least one external output port; the internal output ports of the first optical amplifying unit and the second optical amplifying unit are both connected to the input port of the optical switch, the internal input ports of the first optical amplifying unit and the second optical amplifying unit are both connected to the output port of the optical switch, the internal output port of the wavelength selective switch is connected to the input port of the optical switch, and the internal input port of the wavelength selective switch is connected to the output port of the optical switch.

[0005] Furthermore, the system further comprises an optical backplane, and the external input port and the external output port of the wavelength selective switch are respectively connected to the optical backplane.

[0006] Compared with the prior art, the effect of the present invention is positive and obvious. In an optical cross-line device of the present invention that supports the optical multiplexing segment protection function, optical amplification units with different gains can be set between the optical switch and the first optical path and the second optical path, providing accurate compensation for optical fiber lines with different attenuation. At the same time, compared with the optical line protection OLP mechanism, the optical multiplexing segment protection mechanism improves the application scope under common complex optical fiber conditions. The device is combined and used in different nodes to realize the protection of two groups of two-fiber bidirectional optical multiplexing segments, providing protection capabilities for the combined wave signal output on the line side, and can be widely used in common working scenarios and optical cross-networking scenarios when the attenuation of the protection line is greatly different. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 The present invention is a schematic diagram of the structure of an optical cross-line device supporting an optical multiplex section protection function. DETAILED DESCRIPTION Example

[0008] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but the present invention is not limited to these embodiments, and all similar structures and similar variations of the present invention should be included in the protection scope of the present invention.

[0009] like Figure 1 As shown, an optical cross-line device supporting an optical multiplex section protection function of the present invention comprises a wavelength selective switch 4, an optical switch 3, a first optical amplifying unit 2 and a second optical amplifying unit 6; the first optical amplifying unit 2 and the second optical amplifying unit 6 each comprise an external input port, an external output port, an internal input port and an internal output port, the optical switch 3 comprises an input port and an output port, the wavelength selective switch 4 comprises an internal input port, an internal output port, at least one external input port and at least one external output port; the internal output ports of the first optical amplifying unit 2 and the second optical amplifying unit 6 are both connected to the input port of the optical switch 3, the internal input ports of the first optical amplifying unit 2 and the second optical amplifying unit 6 are both connected to the output port of the optical switch 3, the internal output port of the wavelength selective switch 4 is connected to the input port of the optical switch 3, and the internal input port of the wavelength selective switch 4 is connected to the output port of the optical switch 3.

[0010] Furthermore, an optical backplane 5 is included, and the external input port and the external output port of the wavelength selection switch 4 are respectively connected to the optical backplane 5 .

[0011] Specifically, the wavelength selective switch 4, the optical switch 3, the first optical amplifying unit 2, the second optical amplifying unit 6, the optical backplane 5, etc. in this embodiment all adopt well-known solutions in the prior art, which are well known to those skilled in the art and will not be described in detail here.

[0012] The working principle of this embodiment:

[0013] During operation, the external output port and the external input port of the first optical amplifying unit 2 are both connected to the first optical path 1 , and the external output port and the external input port of the second optical amplifying unit 6 are both connected to the second optical path 7 .

[0014] The wavelength selective switch 4 couples a plurality of input combined wave signals from the optical backplane 5 into a new combined wave signal after wavelength screening, and outputs the new combined wave signal to the optical switch 3 through the internal output port.

[0015] The optical switch 3 evenly divides the input signal from the wavelength selective switch 4 and outputs it to the first optical amplifying unit 2 or the second optical amplifying unit 6 through the external output port.

[0016] The optical switch 3 selects one of the input signals from the first optical amplifying unit 2 and the second optical amplifying unit 6 and outputs it to the wavelength selective switch through the output port.

[0017] The wavelength selective switch 4 selects an input multiplexed signal from the optical switch 3 and outputs it to the optical backplane 5 through a plurality of external output ports after wavelength screening.

[0018] Optical amplification units with different gains can be set between the optical switch 3 and the first optical path 1 and the second optical path 7 to provide accurate compensation for optical fiber lines with different attenuation. At the same time, compared with the optical line protection OLP mechanism, the optical multiplexing section protection mechanism improves the application range under common complex optical fiber conditions. The device is combined and used in different nodes to realize the protection function of two groups of two-fiber bidirectional optical multiplexing sections, providing protection for the combined wave signal output on the line side, and can be widely used in common working scenarios and optical cross-networking scenarios when the protection line attenuation is greatly different.

Claims

1. An optical cross-line device supporting optical multiplex section protection function, characterized in that: The invention comprises a wavelength selective switch (4), an optical switch (3), a first optical amplifying unit (2) and a second optical amplifying unit (6); the first optical amplifying unit (2) and the second optical amplifying unit (6) each comprise an external input port, an external output port, an internal input port and an internal output port; the optical switch (3) comprises an input port and an output port; the wavelength selective switch (4) comprises an internal input port, an internal output port, at least one external input port and at least one external output port; the internal output ports of the first optical amplifying unit (2) and the second optical amplifying unit (6) are both connected to the input port of the optical switch (3); the first optical amplifying unit (2) and the second optical amplifying unit (6) are connected to the input port of the optical switch (3); the first optical amplifying unit (6) The optical amplifier (2) and the second optical amplifier (6) have internal input ports connected to the output port of the optical switch (3), the internal output port of the wavelength selection switch (4) is connected to the input port of the optical switch (3), and the internal input port of the wavelength selection switch (4) is connected to the output port of the optical switch (3); and the optical backplane (5) is also included, and the external input port and the external output port of the wavelength selection switch (4) are respectively connected to the optical backplane (5); the external output port and the external input port of the first optical amplifier (2) are both connected to the first optical path (1), and the external output port and the external input port of the second optical amplifier (6) are both connected to the second optical path (7).

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