CN214959550U - Optical signal transmitting/receiving switching unit and distributed optical switching system - Google Patents
Optical signal transmitting/receiving switching unit and distributed optical switching system Download PDFInfo
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Abstract
The utility model relates to an optical signal receiving and dispatching switching unit, distributed optical switching system and extension method thereof. Having N input/output optical ports, each optical port capable of simultaneously transmitting and receiving optical signals, the optical signal transceiving switching unit comprising: n optical ports on one side are used as internal input/output optical ports, and N optical ports on the other side are used as input/output optical ports of the optical transceiving switching unit; the N tunable optical modules are correspondingly interconnected with N internal input/output optical ports of the circularly addressed arrayed waveguide grating router one by one; the tunable optical module is provided with a light emitting unit and a light receiving unit; the control mainboard is electrically connected with the N tunable optical modules and used for controlling the corresponding tunable optical modules to send out optical signals with the appointed wavelengths according to the received management information; the management information received by the control main board is obtained by the upper computer or the light signal received by the light receiving unit through demodulation.
Description
Technical Field
The utility model relates to an optical signal receiving and dispatching exchange unit, distributed optical switching system. The method is suitable for the technical field of optical network communication.
Background
In the information age, with the rapid increase of applications such as cloud computing, data centers, internet of things, virtual reality, high-definition short videos and the like, the global data volume is increased explosively, and the global data growth is expected to be maintained at about 50% in the future every year. While 90% of global data comes from data centers, how to process massive data requires continuous expansion of infrastructure of large data centers, especially optical switching system equipment.
In order to cope with the rapid increase of data volume, the optical switching device needs to support large-capacity optical switching, and also requires scalability of the optical switching system, which facilitates capacity upgrade.
The existing optical switching devices mainly include the following:
1. in a conventional switching system based on electrical-optical-electrical conversion, a plurality of pairs of optical modules are required to perform electrical-optical conversion by data forwarding, the number of optical modules is large, and the capacity expansion of a hardware system is difficult (see fig. 1).
2. WSS-based ROADMs, the biggest feature of WSS-based ROADMs is that each wavelength can be switched independently. The multi-port WSS module can independently allocate any wavelength to any path, so the ROADM based on the WSS technology has multiple degrees of freedom, Mesh network interconnection can be realized, and the large-capacity WSS technology has high difficulty (see FIG. 2).
3. The optical cross-connect switch based optical switching system has the disadvantages of difficult manufacturing and high cost (see fig. 3).
4. The optical switching system based on the tunable wavelength converter and the CyclicAWG (see fig. 4, 5 and 6) realizes large-capacity optical switching through a cascade or wave-combining structure. However, the above structures are all lumped optical switches, and the expansion of the total capacity is limited by the port numbers of the AWG and the optical crossbar switch, which is inconvenient for arbitrary expansion.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: in view of the above problems, an optical signal transceiving switching unit and a distributed optical switching system are provided.
The utility model adopts the technical proposal that: an optical signal transceiving switching unit having N input/output optical ports, each of which is capable of simultaneously transmitting and receiving an optical signal, comprising:
n optical ports on one side are used as internal input/output optical ports, and N optical ports on the other side are used as input/output optical ports of the optical transceiving switching unit;
the N tunable optical modules are correspondingly interconnected with N internal input/output optical ports of the circularly addressed arrayed waveguide grating router one by one; the tunable optical module is provided with an optical transmitting unit and an optical receiving unit, wherein the optical transmitting unit can send optical signals containing data information and management information through an output optical port of the circularly addressed arrayed waveguide grating router, and the optical receiving unit can receive the optical signals containing the data information and the management information sent by a remote node through the circularly addressed arrayed waveguide grating router;
the control mainboard is electrically connected with the N tunable optical modules and used for controlling the corresponding tunable optical modules to send out the optical signals with the appointed wavelengths according to the received management information, so that the optical signals with the appointed wavelengths sent out by the corresponding tunable optical modules are sent out from the appointed optical port on the other side after passing through the circularly addressed arrayed waveguide grating router;
the management information received by the control main board is obtained by the upper computer or the light signal received by the light receiving unit through demodulation.
An optical signal transceiving switching unit having N output optical ports capable of transmitting optical signals and N input optical ports capable of receiving optical signals, comprising:
n optical ports on one side of the NxN circularly addressed arrayed waveguide grating router I are used as internal input optical ports, and N optical ports on the other side of the NxN circularly addressed arrayed waveguide grating router I are used as output optical ports of the optical transceiving switching unit;
the N light emitting units are correspondingly interconnected with the N internal input light ports of the cyclic addressing arrayed waveguide grating router I one by one, and can send optical signals containing data information and management information to the cyclic addressing arrayed waveguide grating router I;
n optical ports on one side of the NxN circularly addressed arrayed waveguide grating router II are used as internal output optical ports, and N optical ports on the other side of the NxN circularly addressed arrayed waveguide grating router II are used as input optical ports of the optical transceiving switching unit;
the N optical receiving units are correspondingly interconnected with the N internal output optical ports of the circularly addressed arrayed waveguide grating router II one by one, and can receive optical signals which are output by the circularly addressed arrayed waveguide grating router II and contain data information and management information;
the control mainboard is electrically connected with the N light emitting units and the N light receiving units and is used for controlling the corresponding light emitting units to emit the optical signals with the appointed wavelengths according to the received management information, so that the optical signals with the appointed wavelengths emitted by the corresponding light emitting units are emitted from the appointed output optical port on the other side after passing through the circularly addressed arrayed waveguide grating router I;
the management information received by the control main board is obtained by the upper computer or the light signal received by the light receiving unit through demodulation.
The management information is transmitted by a low bit rate management channel constructed by a set top technology;
after receiving the management information, a control mainboard of the optical signal transceiving switching unit of the sending end loads the management information with low bit rate into the optical signal;
after the optical fiber transmission, the management information in the optical signal is demodulated into a low bit rate management signal separated from the data information of the high bit rate by an optical receiving unit in an optical signal receiving and transmitting switching unit of the receiving end, and the low bit rate management signal is sent to a control mainboard after being denoised and amplified.
The management information includes network state change information, wavelength switching information, and synchronization control signals.
The light emitting unit consists of a tunable laser for emitting light signals and a driving circuit; the light receiving unit consists of a detector for receiving light signals and a receiving circuit.
A distributed optical switching system having a plurality of nodes, characterized by: the nodes are directly interconnected through optical fibers or indirectly interconnected through the optical fibers and the nodes, and each node comprises a server cluster or a host and the optical signal receiving and transmitting exchange unit;
the server cluster or the host is interconnected with the optical signal transceiving switching unit in the same node, and the server cluster or the host sends and receives data through the optical signal transceiving switching unit interconnected with the server cluster or the host;
the optical port of the optical signal transceiving switching unit in the node is directly connected with the corresponding optical port of the optical signal transceiving switching unit in another node in the system through an optical fiber, or is indirectly connected with the corresponding optical port of the optical signal transceiving switching unit in another node in the system through one or more intermediate nodes.
A control mainboard in an optical signal transceiving switching unit of a transmitting end node acquires data to be transmitted and management information transmitted by a server cluster or a host in the same node;
the control mainboard of the optical signal transceiving switching unit determines the wavelength of a signal emitted by a tunable laser in the light emitting unit according to the management information, and controls the corresponding light emitting unit to emit a wavelength-designated optical signal in combination with the data to be transmitted;
the specified wavelength optical signal sent by the light emission unit is transmitted to a corresponding internal input optical port on the circularly addressed arrayed waveguide grating router, and the circularly addressed arrayed waveguide grating router sends the specified wavelength optical signal received by the corresponding internal input optical port out of an optical port corresponding to the management information on the other side;
the optical signal sent by the sending end node is directly transmitted to the corresponding receiving end node of the management information directly connected with the sending end node through the corresponding optical fiber or is transmitted to the corresponding receiving end node of the management information indirectly connected with the sending end node through one or more intermediate nodes;
and the optical signal receiving and transmitting switching unit of the receiving end node controls the main board to demodulate data information and management information from the received optical signal, and the control main board uploads the data information to a server cluster or a host of the same node after confirming that the management information corresponds to the local node.
The optical signal receiving and transmitting exchange unit of the intermediate node demodulates data information and management information from the optical signal sent by the previous node;
the control main board determines the wavelength of a signal emitted by the tunable laser in the corresponding light emitting unit according to the management information, and controls the corresponding light emitting unit to emit a wavelength-designated optical signal in combination with the data to be transmitted;
the optical emission unit sends out the optical signal with the appointed wavelength to the corresponding internal input end of the circular addressing array waveguide grating router, and the circular addressing array waveguide grating router sends out the optical signal with the appointed wavelength received by the corresponding internal input end from the optical port corresponding to the management information on the other side.
An extension method of the distributed optical switching system is used for adding a node in an existing distributed optical switching system, and is characterized in that:
connecting an output optical port of the optical signal transceiving switching unit in the newly added node with an input optical port of the optical signal transceiving switching unit in the node in the existing distributed optical switching system through an optical fiber;
connecting an input optical port of an optical signal transceiving switching unit in the newly added node with an output optical port of an optical signal transceiving switching unit in the node in the existing distributed optical switching system through an optical fiber;
and updating the direct and indirect connection relation between each optical port of the optical signal transceiving switching unit in each node and the rest nodes in the system.
The utility model has the advantages that: the utility model discloses the wavelength routing function (can follow specific output optical port output from the specific wavelength signal of specific input optical port input) that optical signal receiving and dispatching switching unit utilized NxN cyclic addressing array waveguide grating router combines a N optical transmission unit, can control the optical port of optical signal output behind the cyclic addressing array waveguide grating router that optical transmission unit sent. The circularly addressed arrayed waveguide grating router can enable optical signals with different wavelengths emitted by a plurality of optical emission units to be coupled to the same output optical port.
The utility model discloses well NxN cyclic addressing array waveguide grating router combines with a N light receiving unit, can separate out the light signal of a plurality of different wavelengths (if have a plurality ofly) from the external light signal of receipt after cyclic addressing array waveguide grating router receives external light signal, and the light signal of a plurality of different wavelengths sends a plurality of light receiving unit respectively, and light receiving unit demodulates out administrative information and data message from its light signal that receives.
The utility model discloses a distributed optical switching system adopts distributed optical switching framework, combines the characteristics that optical signal receiving and dispatching switching unit can confirm the optical signal output port as required, on one hand can realize the capacity expansion as required of switching system, and need not to replace the existing switching system unit, is not limited by the port number of optical signal receiving and dispatching switching unit; on the other hand, mutual protection among the optical signal transceiving switching units of different paths can be realized.
Drawings
FIGS. 1 to 6 are schematic structural diagrams of the prior art.
Fig. 7 is a schematic structural diagram of the distributed optical switching system in the embodiment (taking 5 network nodes as an example, all-connected operation).
Fig. 8 is a schematic diagram of a single-fiber bidirectional structure of an optical transceiver switching unit in the embodiment.
Fig. 9 is a schematic structural diagram of a tunable optical module in an embodiment.
Fig. 10 is a schematic diagram of a non-fully connected structure of the distributed optical switching system in the embodiment (taking 5 network nodes as an example, the non-fully connected operation).
Fig. 11 is a schematic structural diagram of the tree-like distributed optical switching system in the embodiment.
Fig. 12 is a schematic diagram of a dual-fiber structure of an optical transceiver switching unit in an embodiment.
Detailed Description
Example 1: the present embodiment is a distributed optical switching system, which has a plurality of nodes, and each node includes an optical signal transceiving switching unit.
Fig. 7 is a schematic structural diagram of the distributed optical switching system in the embodiment, where an optical transceiving switching unit 1 in each node is directly interconnected with optical transceiving switching units in other 4 nodes through an optical fiber or a waveguide 2, so as to form a full connection structural form of the distributed optical switching system.
In this example, each node in the distributed optical switching system has an optical signal transceiving switching unit, each optical signal transceiving switching unit has N (in this example, N is greater than or equal to 4) input/output optical ports, and any 4 input/output optical ports of the optical signal transceiving switching unit are respectively connected to a certain input/output optical port on the optical signal transceiving switching unit in the remaining 4 nodes.
Fig. 8 is a schematic diagram of a single-fiber bidirectional structure of the optical transceiver switching unit in the embodiment. The optical transceiver switching unit 1 is composed of a tunable laser module 11, an NxN circularly addressed arrayed waveguide grating router 14 and a control main board 16, wherein one side of the circularly addressed arrayed waveguide grating router is provided with N internal input/output optical ports, and the other side of the circularly addressed arrayed waveguide grating router is provided with N external input/output optical ports. The tunable optical module has N internal input/output optical ports, which are in one-to-one correspondence with the N internal input/output optical ports on one side of the circularly addressed arrayed waveguide grating router 14, the input/output optical ports 12 of the tunable optical module are interconnected with the corresponding internal input/output optical ports on one side of the circularly addressed arrayed waveguide grating router 14 through optical fibers or waveguides, the external input/output optical ports on the other side of the circularly addressed arrayed waveguide grating router 14 are used as the N input/output optical ports of the optical transceiving switching unit, and the input/output optical ports of the optical transceiving switching unit can simultaneously transmit and receive optical signals.
Fig. 9 is a schematic structural diagram of the tunable optical module 11 in the embodiment, where the tunable optical module 11 includes a filter 104, an optical transmitting unit and an optical receiving unit, the optical transmitting unit includes a tunable laser TLD 101 for transmitting an optical signal and a driving circuit, and is capable of transmitting an optical signal including high-bit-rate data information and low-bit-rate management information; the light receiving unit is composed of a detector (in this example, the photodiode PD102) for receiving the light signal and a receiving circuit, and is capable of receiving the light signal containing the high bit rate data information and the low bit rate management information. In this example, the tunable laser TLD 101 and the photodiode PD102 are mounted on a driving and receiving circuit board 103, and the driving and receiving circuit board 103 is formed with a driving circuit and a receiving circuit.
In this embodiment, an optical signal emitted by the tunable laser TLD 101 passes through the filter 104 and is output through the module input/output optical port 12; the optical signal of the input/output optical port 12 of the input module passes through the filter 104 and is received by the photodiode PD 102. The filter 104 in this example may be replaced by a circulator to achieve the wavelength independent characteristic of filtering the input and output signals.
In this example, the control motherboard 16 is electrically connected to the N tunable optical modules 11, and the control motherboard 16 controls the corresponding tunable optical module 11 to emit the wavelength-specific optical signal with the corresponding wavelength according to the received management information, so that the wavelength-specific optical signal emitted by the corresponding tunable optical module is emitted from the external input/output optical port specified on the other side of the cyclically addressed arrayed waveguide grating router 14 after passing through the cyclically addressed arrayed waveguide grating router.
In this embodiment, the management information received by the control motherboard is sent to the control motherboard by an upper computer in the same node or sent to the control motherboard after the management information is demodulated from the optical signal received by the optical receiving unit.
The management information in this embodiment includes network status change information, wavelength switching information, and synchronization control signals. The network state change information comprises network state information of the optical transceiving switching node and transmission path information determined according to indirect connection relations and between nodes in a system in which the transmitting end node and the receiving end node are combined and stored; the wavelength switching information is used for controlling the switching of wavelength channels of the tunable laser; the synchronous control signal is used for synchronously triggering the wavelength switching of the tunable lasers of different nodes. The management information is transmitted by a low bit rate management channel constructed by a top-tuning technology, and after receiving the management information, a control mainboard of a sending end loads the low bit rate management information into an optical signal in top-tuning modes such as single carrier amplitude modulation, multi-carrier amplitude modulation or frequency modulation; after the optical fiber transmission, the management information in the optical signal can be demodulated into a low bit rate management signal separated from the high bit rate data through a receiving circuit of the receiving end, and the low bit rate management signal is de-noised, amplified and then sent to a receiving end control mainboard for processing.
In this example, the data transmission method between nodes of the distributed optical switching system is as follows:
an optical signal transceiving switching unit of a transmitting end node acquires one or more groups of management information and data to be transmitted, which are transmitted by an upper computer;
the control mainboard of the optical signal transceiving switching unit determines the wavelength of a signal transmitted by the tunable laser in the corresponding light transmitting unit according to the management information, and loads the wavelength routing information of the remote node into the management signal with low bit rate in a single carrier amplitude modulation, multi-carrier amplitude modulation or frequency modulation mode and the like.
The optical signal with the appointed wavelength sent by the optical emission unit is transmitted to a corresponding internal input/output optical port on the circularly addressed arrayed waveguide grating router, and the optical signal with the appointed wavelength is output from an external input/output optical port appointed on the other side of the circularly addressed arrayed waveguide grating router after passing through the circularly addressed arrayed waveguide grating router; when a plurality of groups of data are transmitted to the same sending end node, the circularly addressed arrayed waveguide grating router couples a plurality of optical signals with different wavelengths to the same external input/output optical port for output;
the optical signals sent by the circularly addressed arrayed waveguide grating router on the transmitting end node through the optical signal transceiving switching unit are directly transmitted to the corresponding receiving end node through the corresponding optical fibers;
an external input/output optical port of a cyclically addressed arrayed waveguide grating router in a receiving end node receives an optical signal transmitted by an optical fiber, and separates a plurality of optical signals with different wavelengths from the received optical signal (for example, the received optical signal is coupled with a plurality of optical signals with different wavelengths), the separated plurality of optical signals with different wavelengths are respectively output from a plurality of internal input/output optical ports of the cyclically addressed arrayed waveguide grating router, and an optical receiving unit corresponding to the internal input/output optical port receives the optical signal output by the internal input/output optical port and demodulates data information and management information from the optical signal;
and the light receiving unit in the receiving end node sends the demodulated data information and the demodulated management information to the control mainboard, and the control mainboard uploads the data information to an upper computer in the same node after confirming that the management information corresponds to the node.
The method for expanding the distributed optical switching system in this embodiment includes:
connecting at least one input/output optical port of the optical signal transceiving switching unit in the newly added node with the input/output optical port of the optical signal transceiving switching unit on at least one node in the existing distributed optical switching system through an optical fiber;
and updating and storing the direct and indirect connection relation between each input/output optical port of the optical signal transceiving switching unit in each node and the rest nodes in the system.
Example 2: as shown in fig. 10, the distributed optical switching system in the non-fully-connected structure form in this embodiment is basically the same as that in embodiment 1, except that in this embodiment, the nodes are not all directly interconnected, and there is a case where the nodes are only indirectly interconnected through another node or nodes in the system.
In this example, the data transmission method between nodes of the distributed optical switching system is as follows:
A. when the sending end node and the receiving end node are directly interconnected, the data transmission method between the nodes is the same as that of the embodiment 1;
B. when the sender node and the receiver node are only indirectly interconnected through another node or nodes in the system, the data transmission method is as follows:
an optical signal transceiving switching unit of a transmitting end node acquires one or more groups of management information and data to be transmitted, which are transmitted by an upper computer;
the control main board of the optical signal receiving and transmitting switching unit determines the corresponding light emitting unit and the corresponding wavelength of the generated signal according to the management information, and controls the corresponding light emitting unit to emit the optical signal with the appointed wavelength of the corresponding wavelength by combining the corresponding data to be transmitted in the same group;
the optical signal with the appointed wavelength sent by the optical emission unit is transmitted to a corresponding internal input/output optical port on the circularly addressed arrayed waveguide grating router, and the optical signal with the appointed wavelength is output from an external input/output optical port appointed on the other side of the circularly addressed arrayed waveguide grating router after passing through the circularly addressed arrayed waveguide grating router; when a plurality of groups of data are transmitted to the same sending end node, the circularly addressed arrayed waveguide grating router couples a plurality of optical signals with different wavelengths to the same external input/output optical port for output;
the optical signals sent by the circularly addressed arrayed waveguide grating router on the transmitting end node through the optical signal transceiving switching unit are transmitted to the next node (intermediate node) on the data transmission path through the corresponding optical fibers;
the optical signal receiving and transmitting exchange unit of the intermediate node demodulates data information and management information from the optical signal sent by the previous node;
the control main board in the intermediate node determines the corresponding light emitting unit and the corresponding wavelength of the generated signal according to the management information, and controls the corresponding light emitting unit to emit the optical signal with the specified wavelength of the corresponding wavelength by combining the data information;
the optical signal with the appointed wavelength sent by the corresponding optical emission unit in the intermediate node is transmitted to a corresponding internal input/output optical port on the circularly addressed arrayed waveguide grating router, and the circularly addressed arrayed waveguide grating router sends the optical signal with the appointed wavelength received by the corresponding internal input/output optical port out of an external input/output optical port appointed by the other side;
the optical signal sent by the intermediate node is transmitted to the next intermediate node (if any) or the corresponding receiving end node on the data transmission path through the optical fiber;
an external input/output optical port of a cyclically addressed arrayed waveguide grating router in a receiving end node receives an optical signal transmitted by an optical fiber, and separates a plurality of optical signals with different wavelengths from the received optical signal (for example, the received optical signal is coupled with a plurality of optical signals with different wavelengths), the separated plurality of optical signals with different wavelengths are respectively output from a plurality of internal input/output optical ports of the cyclically addressed arrayed waveguide grating router, and an optical receiving unit corresponding to the internal input/output optical port receives the optical signal output by the internal input/output optical port and demodulates data information and management information from the optical signal;
and the light receiving unit in the receiving end node sends the demodulated data information and the demodulated management information to the control mainboard, and the control mainboard uploads the data information to an upper computer in the same node after confirming that the management information corresponds to the node.
Example 3: as shown in fig. 11, the distributed optical switching system in the present embodiment is basically the same as that in embodiment 2, except that the nodes in the present embodiment are distributed in a tree shape, and data of a server cluster (upper computer) in the nodes is transmitted and received through an optical signal transceiving switching unit interconnected with the nodes.
Example 4: this embodiment is substantially the same as embodiments 1, 2 or 3, except that in this embodiment, the optical transceiver switch unit 1 adopts a dual-fiber structure, and the optical transceiver switch unit 1 is composed of an NxN cyclically addressed arrayed waveguide grating router i 105, an NxN cyclically addressed arrayed waveguide grating router ii 106, N optical transmitter units, N optical receiver units and a control main board 16.
In this example, the cyclically addressed N optical ports on one side of the arrayed waveguide grating router i serve as the internal input optical ports 110, and the N optical ports on the other side serve as the external output optical ports 107 and serve as the output optical ports of the optical transceiving switching unit. The N light emitting units correspond to the N internal input optical ports of the cyclically addressed arrayed waveguide grating router i one to one, and the light emitting ports 109 of the light emitting units are connected to the corresponding internal input optical ports 110 on the cyclically addressed arrayed waveguide grating router i through optical fibers or waveguides 2.
In this embodiment, N optical ports on one side of the circularly addressed arrayed waveguide grating router ii are used as the internal output optical ports 112, and N optical ports on the other side are used as the external input optical ports 108 and are used as the input optical ports of the optical transceiving switching unit. The N optical receiving units correspond to the N internal output optical ports of the cyclically addressed arrayed waveguide grating router ii one to one, and the internal output optical port 112 on the cyclically addressed arrayed waveguide grating router ii is connected to the optical receiving port 111 of the corresponding optical receiving unit through an optical fiber or a waveguide 2.
In this embodiment, the control motherboard 16 is electrically connected to both the N light emitting units and the N light receiving units, and the control motherboard 16 controls the corresponding light emitting units to emit the wavelength-specific optical signals with the corresponding wavelengths according to the received management information, so that the wavelength-specific optical signals emitted by the corresponding light emitting units are emitted from the external output optical port specified on the other side of the cyclically addressed arrayed waveguide grating router i after passing through the cyclically addressed arrayed waveguide grating router i.
In the distributed optical switching system of this embodiment, an output optical port of the on-node optical transceiver switching unit is directly connected to an input optical port of the on-node optical transceiver switching unit in the system via an optical fiber or indirectly connected to another node via an optical fiber, and an input optical port of the on-node optical transceiver switching unit is directly connected to an output optical port of the on-node optical transceiver switching unit in the system via an optical fiber or indirectly connected to another node via another node.
The method for expanding the distributed optical switching system in this embodiment includes:
connecting at least one output optical port of the optical signal transceiving switching unit in the newly added node with an input optical port of the optical signal transceiving switching unit in the node in the existing distributed optical switching system through an optical fiber;
connecting at least one input optical port of the optical signal transceiving switching unit in the newly added node with an output optical port of the optical signal transceiving switching unit in the node in the existing distributed optical switching system through an optical fiber;
and updating the direct and indirect connection relation between each input and output optical port of the optical signal transceiving switching unit in each node and other nodes in the system.
The above-mentioned embodiment is only used for explaining the utility model concept, and not to the limit of the utility model protection, and all utilize this concept to be right the utility model discloses carry out insubstantial change, all shall fall into the scope of protection of the utility model.
Claims (6)
1. An optical signal transceiving switching unit having N input/output optical ports, each of which is capable of simultaneously transmitting and receiving an optical signal, comprising:
n optical ports on one side are used as internal input/output optical ports, and N optical ports on the other side are used as input/output optical ports of the optical transceiving switching unit;
the N tunable optical modules are correspondingly interconnected with N internal input/output optical ports of the circularly addressed arrayed waveguide grating router one by one; the tunable optical module is provided with an optical transmitting unit and an optical receiving unit, wherein the optical transmitting unit can send optical signals containing data information and management information through an output optical port of the circularly addressed arrayed waveguide grating router, and the optical receiving unit can receive the optical signals containing the data information and the management information sent by a remote node through the circularly addressed arrayed waveguide grating router;
the control mainboard is electrically connected with the N tunable optical modules and used for controlling the corresponding tunable optical modules to send out the optical signals with the appointed wavelengths according to the received management information, so that the optical signals with the appointed wavelengths sent out by the corresponding tunable optical modules are sent out from the appointed optical port on the other side after passing through the circularly addressed arrayed waveguide grating router;
the management information received by the control main board is obtained by the upper computer or the light signal received by the light receiving unit through demodulation.
2. An optical signal transceiving switching unit having N output optical ports capable of transmitting optical signals and N input optical ports capable of receiving optical signals, comprising:
n optical ports on one side of the NxN circularly addressed arrayed waveguide grating router I are used as internal input optical ports, and N optical ports on the other side of the NxN circularly addressed arrayed waveguide grating router I are used as output optical ports of the optical transceiving switching unit;
the N light emitting units are correspondingly interconnected with the N internal input light ports of the cyclic addressing arrayed waveguide grating router I one by one, and can send optical signals containing data information and management information to the cyclic addressing arrayed waveguide grating router I;
n optical ports on one side of the NxN circularly addressed arrayed waveguide grating router II are used as internal output optical ports, and N optical ports on the other side of the NxN circularly addressed arrayed waveguide grating router II are used as input optical ports of the optical transceiving switching unit;
the N optical receiving units are correspondingly interconnected with the N internal output optical ports of the circularly addressed arrayed waveguide grating router II one by one, and can receive optical signals which are output by the circularly addressed arrayed waveguide grating router II and contain data information and management information;
the control mainboard is electrically connected with the N light emitting units and the N light receiving units and is used for controlling the corresponding light emitting units to emit the optical signals with the appointed wavelengths according to the received management information, so that the optical signals with the appointed wavelengths emitted by the corresponding light emitting units are emitted from the appointed output optical port on the other side after passing through the circularly addressed arrayed waveguide grating router I;
the management information received by the control main board is obtained by the upper computer or the light signal received by the light receiving unit through demodulation.
3. The optical signal transceiving switching unit according to claim 1 or 2, wherein: the management information is transmitted by a low bit rate management channel constructed by a set top technology;
after receiving the management information, a control mainboard of the optical signal transceiving switching unit of the sending end loads the management information with low bit rate into the optical signal;
after the optical fiber transmission, the management information in the optical signal is demodulated into a low bit rate management signal separated from the data information of the high bit rate by an optical receiving unit in an optical signal receiving and transmitting switching unit of the receiving end, and the low bit rate management signal is sent to a control mainboard after being denoised and amplified.
4. The optical signal transceiving switching unit of claim 3, wherein: the management information includes network state change information, wavelength switching information, and synchronization control signals.
5. The optical signal transceiving switching unit according to claim 1 or 2, wherein: the light emitting unit consists of a tunable laser for emitting light signals and a driving circuit; the light receiving unit consists of a detector for receiving light signals and a receiving circuit.
6. A distributed optical switching system having a plurality of nodes, characterized by: the nodes are directly interconnected through optical fibers or indirectly interconnected through the optical fibers and the nodes, each node comprises a server cluster or a host, and the optical signal transceiving switching unit as claimed in any one of claims 1 to 5;
the server cluster or the host is interconnected with the optical signal transceiving switching unit in the same node, and the server cluster or the host sends and receives data through the optical signal transceiving switching unit interconnected with the server cluster or the host;
the optical port of the optical signal transceiving switching unit in the node is directly connected with the corresponding optical port of the optical signal transceiving switching unit in another node in the system through an optical fiber, or is indirectly connected with the corresponding optical port of the optical signal transceiving switching unit in another node in the system through one or more intermediate nodes.
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| CN202121349795.9U Active CN214959550U (en) | 2021-06-17 | 2021-06-17 | Optical signal transmitting/receiving switching unit and distributed optical switching system |
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