Multi-core optical fiber, parallel optical transmission optical module and optical interconnection system

Abstract

The invention provides a multi-core optical fiber, a parallel optical transmission optical module and an optical interconnection system, which can solve the problem of high operation and maintenance cost caused by coexistence of PSM and WDM optical modules and non-uniform optical module interface and optical fiber wiring in the prior art, the multi-core optical fiber comprises a multi-core optical fiber, the size of a central fiber core is the same as that of a single-mode optical fiber, and the optical interconnection system comprises a single-mode optical fiber and a single-mode optical fiber. The wavelength division multiplexing module is used for transmitting wavelength division multiplexing optical signals; the plurality of peripheral fiber cores are arranged around the central fiber core and are used for transmitting multiple paths of parallel optical signals; an optical interface of the parallel optical transmission optical module is connected with a peripheral fiber core of the multi-core optical fiber, and the parallel optical transmission optical module is used for transmitting multiple paths of parallel optical signals through the peripheral fiber core; the wavelength division multiplexing optical module is provided with a single-channel optical interface, and the single-channel optical interface is connected with the central fiber core of the multi-core optical fiber and used for transmitting wavelength division multiplexing optical signals through the central fiber core.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical communication technology, in particular to a multi-core optical fiber for intra-data center interconnection, a parallel optical transmission optical module, and an optical interconnection system compatible with parallel optical fiber transmission and wavelength division multiplexing transmission. BACKGROUND

[0002] With the rapid development of AI cluster applications, the global market's demand for bandwidth and high-speed networks is increasingly urgent. In the context of the widespread application of inference models, a large number of optical interconnection modules are deployed within data centers for high-speed interconnection between servers, servers to switches, and switches.

[0003] Currently, there are two technical routes for optical interconnection solutions within data centers: parallel single mode (PSM) and wavelength division multiplexing (WDM).

[0004] As shown in Figure 1 , the PSM optical module transmits multiple optical signals simultaneously through multiple parallel optical fibers, usually using MPO multi-core fiber connectors. The PSM optical module has the advantages of relatively simple structure and lower requirements for optoelectronic modules or modules, thus having relatively low cost. However, the PSM optical module has significant disadvantages: multiple optical fibers are required, the number of optical fibers is large, and the cost of optical fibers increases significantly when the transmission distance is long (e.g., more than 500 meters). In addition, the use of multiple optical fibers also increases the complexity of data center wiring and operation and maintenance difficulty.

[0005] As shown in Figure 2 , the WDM optical module uses wavelength division multiplexing technology to aggregate multiple optical signals of different wavelengths into a single optical fiber for transmission. The WDM optical module usually uses an LC-type optical interface with a single optical fiber. The WDM optical module integrates multiple laser light sources of different wavelengths and combiners / splitters and other devices. The WDM optical module has the advantage of fewer interconnection optical fibers, but the disadvantage is that the internal devices of the module are complex, and the cost increases compared to the PSM optical module.

[0006] Due to the advantages and disadvantages of the two optical module solutions, both solutions are often deployed simultaneously within data centers according to different network architectures, transmission distances, bandwidth requirements, and usage habits. However, the coexistence of the two optical modules presents a prominent problem: the PSM optical module uses an MPO interface to connect multiple parallel optical fibers, and the WDM optical module uses an LC-type optical interface to connect a single optical fiber. The two interfaces are completely different and cannot be used interchangeably. Because the two types of optical modules have different optical interfaces, deploying them in the same data center requires preparing various types of optical modules depending on the quantity used. Data centers also need to simultaneously store and manage two different types of optical cables, increasing inventory costs and management complexity. The coexistence of the two types of optical modules increases operational difficulty and costs. Therefore, how to unify the fiber optic categories in data centers and standardize the interfaces of PSM and WDM optical modules is one of the challenges currently facing the industry. Summary of the Invention

[0007] To address the aforementioned issues, this invention provides a multi-core optical fiber, a parallel optical transmission optical module, and an optical interconnect system, which can solve the problem of high operation and maintenance costs caused by the coexistence of PSM and WDM optical modules and the inconsistency between optical module interfaces and optical fiber cabling in the prior art.

[0008] The technical solution is as follows: a multi-core optical fiber, characterized in that it is used in data centers and includes: The central fiber core has the same dimensions as a single-mode fiber and is used to transmit wavelength division multiplexing optical signals. The peripheral fiber cores are arranged in multiple ways, surrounding the central fiber core, and are used to transmit multiple parallel optical signals.

[0009] Furthermore, the outer peripheral fiber core is provided with 4n fibers, where n is a positive integer greater than or equal to 1.

[0010] A parallel optical transmission optical module, characterized in that it comprises: The optoelectronic processing unit is used to perform optoelectronic conversion between multiple parallel optical signals and multiple parallel electrical signals; An optical transceiver assembly is connected to the optoelectronic processing unit, and the optical transceiver assembly includes multiple parallel optical channels; An optical fiber conversion device, one end of which is optically coupled to the parallel optical channel of the optical transceiver assembly; An optical interface is provided, which is connected to the other end of the optical fiber conversion device; the optical interface is a single-fiber interface, and can be pluggably connected to a multi-core optical fiber as described above. The fiber conversion device is used to establish an optical coupling path between the multiple parallel optical channels of the optical transceiver assembly and the multiple peripheral cores of the multi-core optical fiber.

[0011] Furthermore, the fiber conversion device employs a fiber fan-outer, which is manufactured using a fused taper process. The first end of the fiber conversion device is matched with the outer core of the multi-core fiber, and the second end of the fiber conversion device is connected to the parallel optical channel of the optical transceiver assembly, for one-to-one optical coupling between the parallel optical channel and the outer core.

[0012] Furthermore, the fiber optic conversion device is integrated inside the optical module.

[0013] Furthermore, the optical transceiver component includes: Laser arrays are used to convert electrical signals into multiple parallel optical signals; A photodetector array is used to convert multiple parallel optical signals into electrical signals; The photoelectric processing unit includes: A transimpedance amplifier array is used to amplify the electrical signal output by the photodetector array; A digital signal processor is used to process amplified electrical signals.

[0014] Furthermore, the optical interface is an LC type optical interface.

[0015] An optical interconnect system, characterized in that it comprises: Such as the multi-core optical fiber mentioned above; As described above, in the parallel optical transmission optical module, the optical interface of the parallel optical transmission optical module is connected to the outer core of the multi-core optical fiber, and is used to transmit multiple parallel optical signals through the outer core. A wavelength division multiplexing (WDM) optical module has a single-channel optical interface, which is connected to the central core of the multi-core optical fiber for transmitting WDM optical signals through the central core.

[0016] Furthermore, both the optical interface of the parallel optical transmission optical module and the single-channel optical interface of the wavelength division multiplexing optical module are LC type optical interfaces.

[0017] Furthermore, the system is applied to optical interconnection between servers, between servers and switches, or between switches within a data center.

[0018] The multi-core optical fiber of this invention integrates the optical transmission channels required for both PSM and WDM applications into the same physical optical fiber. The central fiber core is compatible with traditional single-mode optical fiber and can be used to transmit WDM signals, while the outer fiber core is used to transmit PSM parallel signals. Data centers only need to deploy the multi-core optical fiber proposed in this invention to support both PSM and WDM application scenarios simultaneously, which can solve the problem of complex optical fiber types and reduce the variety of optical cable inventory in data centers. The parallel optical transmission optical module of the present invention integrates the optical fiber conversion device into the optical module and changes the external optical interface from the traditional MPO multi-core interface to a single fiber interface compatible with WDM optical modules. Regardless of whether PSM links or WDM links are deployed, on-site maintenance personnel face a unified optical interface and a unified multi-core fiber. The unification of the interface significantly reduces the complexity of operation and can improve the efficiency of network deployment and maintenance. At the same time, the unified interface can also enhance the flexibility of network architecture adjustment and facilitate upgrades. By adopting the optical interconnect system of this invention, data centers can achieve the unification of optical fibers and optical interfaces, reduce the types and quantities of spare parts, lower inventory costs, and simplify network planning, deployment, and subsequent maintenance processes through the unified physical connection method, thereby improving operational efficiency. Attached Figure Description

[0019] Figure 1 This is a block diagram illustrating the principle of a PSM optical module in the prior art. Figure 2 This is a block diagram illustrating the principle of a WDM optical module in the prior art. Figure 3 A schematic diagram of the cross-sectional structure of a multi-core optical fiber provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the optical fiber conversion device provided in an embodiment of the present invention; Figure 5 A block diagram of a parallel optical transmission optical module provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the parallel optical transmission optical module provided in an embodiment of the present invention; Figure 7 This is a block diagram of the optical interconnect system provided in an embodiment of the present invention. Detailed Implementation

[0020] The technical solution of the present invention will now be described in detail with reference to the accompanying drawings.

[0021] Before describing the technical solution of the present invention in detail, the prior art will be described in detail first, so as to better understand the innovation of the present invention.

[0022] like Figure 1 As shown, the traditional PSM optical module 101, taking the silicon photonics module as an example, contains an optoelectronic processing unit and an optical transceiver assembly. The optical transceiver assembly contains multiple parallel optical channels, each of which performs optoelectronic conversion independently.

[0023] At the transmitting end, multiple electrical signals are converted into multiple parallel optical signals by their respective lasers or modulators; at the receiving end, the multiple parallel optical signals are converted into electrical signals by their respective photodetectors, and the parallel optical signals are transmitted through multiple independent optical fibers 102. The optical interface of the optical module usually adopts an MPO connector, which can simultaneously accommodate and align multiple optical fibers.

[0024] like Figure 2 As shown, the traditional WDM optical module 201 integrates multiple laser sources of different wavelengths, a multiplexer, and a demultiplexer.

[0025] At the transmitting end, multiple optical signals of different wavelengths are converged into a single optical fiber by a multiplexer; at the receiving end, the multi-wavelength multiplexed signal in the single optical fiber is separated into optical signals of various wavelengths by a demultiplexer, and then photoelectric conversion is performed separately. The optical interface of the WDM optical module usually uses an LC connector to connect to a single optical fiber 202.

[0026] The core problem with existing technologies is that the PSM optical module 101 achieves high bandwidth through parallel transmission of multiple optical fibers, while the WDM optical module 201 achieves high bandwidth through wavelength multiplexing. This leads to fundamental differences in their optical interface designs, which is also the root cause of the inconsistency between optical fibers and interfaces in data centers.

[0027] Example 1: An embodiment of the present invention provides a newly designed multi-core optical fiber, the cross-sectional structure of which is as follows: Figure 3 As shown, it includes a central fiber core 301 located at the center and multiple peripheral fiber cores 302 distributed around the central fiber core 301. The parameters of the central fiber core 301 are compatible with standard single-mode fiber, such as single-mode fiber conforming to the ITU-T G.652.D standard, and are used to transmit WDM signals. The fibers are evenly distributed around the central fiber core 301. Figure 3 There are four outer peripheral fiber cores 302, located at the top, bottom, left and right of the central fiber core, and each outer peripheral fiber core 302 can transmit optical signals independently.

[0028] The peripheral fiber cores 302 are separated from each other and from the central fiber core 301 by a reasonable spacing to avoid crosstalk of optical signals. Each peripheral fiber core 302 can serve as an independent optical channel to transmit one parallel optical signal in the PSM signal.

[0029] In this embodiment, there are four peripheral fiber cores 302 to support PSM4 applications. PSM4 is a four-way parallel transmission with a total bandwidth four times that of a single channel. In other embodiments, the number of peripheral fiber cores can be adjusted according to actual needs. For example, eight peripheral fiber cores can be set to support PSM8 applications, or twelve or more peripheral fiber cores can be set to support applications with higher parallelism.

[0030] The arrangement of the outer peripheral fiber cores 302 can also be adjusted as needed, such as using a hexagonal arrangement, a ring arrangement, or a matrix arrangement, as long as it can ensure optical isolation between the fiber cores and facilitate optical alignment.

[0031] When the multi-core fiber in this embodiment is used for WDM transmission, the WDM optical signal is transmitted only through the central fiber core 301, while the outer fiber cores 302 are either unused or idle. When the multi-core fiber in this embodiment is used for PSM transmission, the four parallel optical signals are transmitted through the four outer fiber cores 302 respectively, while the central fiber core 301 is either unused or idle. Through the multi-core fiber design in this embodiment, the same multi-core fiber can flexibly support two different application scenarios, achieving uniformity in fiber type.

[0032] Example 2: See Figure 5 An embodiment of the present invention provides a parallel optical transmission optical module 400, comprising: The optoelectronic processing unit 410 is used to perform optoelectronic conversion between multiple parallel optical signals and multiple parallel electrical signals. The optical transceiver assembly 420 is connected to the optoelectronic processing unit 410, and the optical transceiver assembly 420 includes multiple parallel optical channels; Fiber optic conversion device 430, one end of which is optically coupled to the parallel optical channel of optical transceiver assembly 420; Optical interface 440 is connected to the other end of optical fiber conversion device 430; the optical interface is a single fiber interface, and optical interface 440 is pluggably connected to the multi-core optical fiber 300 in embodiment 1. The optical fiber conversion device 430 is used to establish an optical coupling path between the multiple parallel optical channels of the optical transceiver assembly 420 and the multiple peripheral fiber cores 302 of the multi-core optical fiber.

[0033] See Figure 4 In this embodiment, the fiber conversion device 430 adopts a fiber fan-outer, which is made by fused taper process. The first end 432 of the fiber conversion device is matched with the outer core 302 of the multi-core fiber, and the second end 431 of the fiber conversion device is connected to the parallel optical channel of the optical transceiver assembly, which is used to perform one-to-one optical coupling between the parallel optical channel and the outer core.

[0034] The fiber optic conversion device 430 supports bidirectional optical transmission. Multiple parallel optical signals emitted by the optical transceiver component enter from the second end and are guided by the optical path inside the device to be coupled to the outer core of the multi-core optical fiber at the first end. Multiple parallel optical signals in the outer core of the multi-core optical fiber enter from the first end, are separated by the optical path inside the device, and are guided to the second end, eventually reaching each parallel optical channel of the optical transceiver component.

[0035] See Figure 6 In this embodiment, the optical transceiver component 420 includes: The laser array 421 is used to convert electrical signals into multiple parallel optical signals. In this embodiment, it includes four independent optical emission channels. It can use a direct modulation laser (DML), an electro-absorption modulation laser (EML), or silicon photonics technology, which can integrate lasers, modulators, waveguides, and grating couplers on a single silicon chip. The photodetector array 422 is used to convert multiple parallel optical signals into electrical signals.

[0036] In this embodiment, the photoelectric processing unit 410 includes: Transimpedance amplifier array 412 is used to amplify the electrical signal output by the photodetector array; Digital signal processor 411 is used to perform clock data recovery, equalization, or decoding on amplified electrical signals; The specific circuit design of the optoelectronic processing unit 410 is basically the same as that of a traditional PSM optical module, but it may be optimized according to specific application requirements. This invention does not limit the specific technical implementation of the optical transceiver components, as long as they can achieve the transmission and reception of multiple parallel optical signals.

[0037] In one embodiment, unlike traditional PSM optical modules, the fiber optic conversion device 430 can be integrated with the optoelectronic processing unit 410 and the optical transceiver assembly 420 into the housing of a parallel optical transmission optical module. This makes the fiber optic conversion device 430 an internal component of the optical module, moving the fiber optic conversion work that originally needed to be performed externally into the module. This simplifies external connections, improves the stability and reliability of optical alignment, and completes the conversion from the traditional MPO interface to the LC type optical interface.

[0038] Unlike traditional PSM optical modules that use MPO multi-core interfaces, this embodiment uses a single-unit LC type optical interface. The parallel optical transmission optical module 400 in this embodiment presents a standard LC type optical interface, which is completely consistent with the interface form of WDM optical modules, thus achieving interface unification.

[0039] Traditional PSM optical modules use an MPO interface to connect multiple independent optical fibers. The parallel optical transmission optical module in this embodiment uses an LC type optical interface to connect a single multi-core optical fiber. The parallel optical transmission optical module group in this embodiment integrates an optical fiber conversion device, realizing the adaptation from parallel optical channels to multi-core optical fibers. The interface of the parallel optical transmission optical module in this embodiment is consistent with that of the WDM optical module, which facilitates unified management and interchangeability.

[0040] The following describes the workflow of the parallel optical transmission optical module 400 in this embodiment: Transmission process: After the multiple parallel electrical signals on the host side are processed by the optoelectronic processing unit, they drive the laser / modulator array in the optical transceiver component to generate multiple parallel optical signals. The parallel optical signals are converged by the optical fiber conversion device 430 and coupled to multiple outer peripheral fiber cores 302 of the multi-core optical fiber, and then transmitted outward through a unified LC type optical interface.

[0041] Reception process: The multi-core optical fiber carrying multiple parallel optical signals is connected to the parallel optical transmission optical module through an LC-type optical interface. The multiple optical signals are transmitted in multiple outer cores 302. After entering the optical module, the optical signals first reach the optical fiber conversion device, which fans out the optical signals from each outer core 302 of the multi-core optical fiber and guides them to multiple independent parallel optical channels inside the optical transceiver assembly. The optical signal on each parallel optical channel is guided to its corresponding photodetector and converted into a weak current signal. The current signal output by the photodetector is then sent to the transimpedance amplifier, which amplifies the current signal and converts it into a voltage signal. The amplified electrical signal can enter the silicon photonics integrated circuit or directly enter the digital signal processor (DSP). The DSP performs key digital signal processing tasks such as clock data recovery, equalization, and decoding, and finally outputs the recovered digital data to the host system.

[0042] Example 3: In an embodiment of the present invention, based on the multi-core optical fiber and parallel optical transmission optical module in the above embodiments, a unified optical interconnect system is also provided, wherein the optical interconnect system in the embodiments is compatible with PSM and WDM.

[0043] See Figure 7 The optical interconnect system in this embodiment is used for optical interconnection between servers, between servers and switches, or between switches within a data center, and includes: As in the above embodiment 1, the multi-core fiber optic cable 300, the backbone optical cable, patch panel patch cord, equipment patch cord, etc. inside the data center all use the above-mentioned multi-core fiber optic cable 300, and the multi-core fiber optic cable 300 is equipped with LC connector. As in the parallel optical transmission optical module 400 of Embodiment 2 above, the optical interface 440 of the parallel optical transmission optical module 400 is connected to the outer periphery fiber core 302 of the multi-core optical fiber, and is used to transmit multiple parallel optical signals through the outer periphery fiber core. The wavelength division multiplexing optical module 500 has an LC type optical interface. The LC type optical interface of the wavelength division multiplexing optical module 500 is connected to the central fiber core 301 of the multi-core optical fiber and is used to transmit wavelength division multiplexing optical signals through the central fiber core.

[0044] Scenario for deploying a WDM link: Within a data center, a WDM optical link needs to be established between two core switches. A multi-core fiber optic patch cord with LC connectors at both ends is used. One end connects to the LC-type optical interface of the WDM optical module of switch A, and the other end connects to the LC-type optical interface of the WDM optical module of switch B. The WDM optical module of switch A combines four optical signals of different wavelengths into a single optical signal through an internal multiplexer. The multiplexed optical signal is output through the LC-type optical interface of the WDM optical module and enters the central fiber core of the multi-core fiber. The multiplexed optical signal is transmitted in the central fiber core to reach the other end. The multiplexed optical signal enters the LC-type optical interface of the WDM optical module of switch B and reaches the interior of the WDM optical module through the central fiber core of the multi-core fiber. The demultiplexer inside the WDM optical module separates the multiplexed optical signal into four independent wavelength optical signals, which are then subjected to photoelectric conversion and processing respectively.

[0045] The outer cores of the multi-core fiber are not used and are in an idle state. Since the central core is compatible with standard single-mode fiber, the WDM optical module can work normally without any modification, and the signal transmission characteristics are the same as those of using traditional single-mode fiber.

[0046] Scenario for deploying PSM links: In a data center, a PSM4 optical link needs to be established between a server and an access switch, requiring a bandwidth of 100Gbps, using 4 parallel transmissions, each with 25Gbps.

[0047] A single multi-core optical fiber with LC connectors at both ends is used. One end is connected to the optical interface of the parallel optical transmission module of the server, and the other end is connected to the optical interface of the parallel optical transmission module of the switch. The entire link uses a uniform multi-core optical fiber.

[0048] The parallel optical transmission module on the server side converts four 25Gbps parallel electrical signals into four parallel optical signals. These four optical signals are coupled to the four outer cores of a multi-core optical fiber through an integrated fiber optic converter. The four optical signals are then transmitted in parallel through the four outer cores of the multi-core optical fiber to reach the other end. The optical signals enter the LC-type optical interface of the parallel optical transmission module on the switch side. Through the fiber optic converter, the four optical signals are fanned out from the outer cores and fed into the four channels of the optical transceiver assembly. Each optical signal is converted back into an electrical signal and output to the switch after photoelectric conversion, signal amplification, and digital signal processing.

[0049] In this scenario, the central core of the multi-core optical fiber is not used and is in an idle state. The four parallel signals are transmitted independently. Through the built-in optical fiber conversion device, the conversion from the traditional MPO interface to the LC type optical interface is realized.

[0050] In the optical interconnect system of this embodiment, both WDM and PSM links use the same type of multi-core optical fiber. Data centers only need to store and manage one type of optical cable, greatly simplifying inventory management. The same multi-core optical fiber patch cord can be used to connect both WDM optical modules and parallel optical transmission optical modules, providing great deployment flexibility. Network administrators can freely choose to deploy either PSM or WDM solutions according to actual needs. Whether it is a WDM optical module or a parallel optical transmission optical module, the external interface is a standard LC type interface, and on-site maintenance personnel do not need to distinguish the interface type, reducing operational difficulty and error risk.

[0051] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0052] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A multi-core optical fiber, characterized in that, Applications in data centers, including: The central fiber core has the same dimensions as a single-mode fiber and is used to transmit wavelength division multiplexing optical signals. The peripheral fiber cores are arranged in multiple ways, surrounding the central fiber core, and are used to transmit multiple parallel optical signals.

2. The multi-core optical fiber according to claim 1, characterized in that: The outer peripheral fiber core is provided with 4n fibers, where n is a positive integer greater than or equal to 1.

3. A parallel optical transmission optical module, characterized in that, include: The optoelectronic processing unit is used to perform optoelectronic conversion between multiple parallel optical signals and multiple parallel electrical signals; An optical transceiver assembly is connected to the optoelectronic processing unit, and the optical transceiver assembly includes multiple parallel optical channels; An optical fiber conversion device, one end of which is optically coupled to the parallel optical channel of the optical transceiver assembly; An optical interface is provided, which is connected to the other end of the optical fiber conversion device; the optical interface is a single-fiber interface, and the optical interface is pluggably connected to a multi-core optical fiber as described in any one of claims 1 to 2; the optical fiber conversion device is used to establish an optical coupling path between the multiple parallel optical channels of the optical transceiver assembly and the multiple peripheral cores of the multi-core optical fiber.

4. The parallel optical transmission optical module according to claim 3, characterized in that: The fiber conversion device employs a fiber fan-out, which is manufactured using a fused taper process. The first end of the fiber conversion device is matched with the outer core of the multi-core fiber, and the second end of the fiber conversion device is connected to the parallel optical channel of the optical transceiver assembly, for one-to-one optical coupling between the parallel optical channel and the outer core.

5. A parallel optical transmission optical module according to claim 3, characterized in that: The fiber optic conversion device is integrated inside the optical module.

6. The parallel optical transmission optical module according to claim 3, characterized in that: The optical transceiver component includes: Laser arrays are used to convert electrical signals into multiple parallel optical signals; A photodetector array is used to convert multiple parallel optical signals into electrical signals; The photoelectric processing unit includes: A transimpedance amplifier array is used to amplify the electrical signal output by the photodetector array; A digital signal processor is used to process amplified electrical signals.

7. A parallel optical transmission optical module according to claim 3, characterized in that: The optical interface is an LC type optical interface.

8. An optical interconnect system, characterized in that, include: Multi-core optical fiber as described in any one of claims 1 to 2; The parallel optical transmission optical module as described in any one of claims 3 to 7, wherein the optical interface of the parallel optical transmission optical module is connected to the outer core of a multi-core optical fiber, and is used to transmit multiple parallel optical signals through the outer core; A wavelength division multiplexing (WDM) optical module has a single-channel optical interface, which is connected to the central core of the multi-core optical fiber for transmitting WDM optical signals through the central core.

9. The optical interconnect system according to claim 8, characterized in that: Both the optical interface of the parallel optical transmission optical module and the single-channel optical interface of the wavelength division multiplexing optical module are LC type optical interfaces.

10. An optical interconnect system according to claim 8, characterized in that: The system is used for optical interconnection between servers, between servers and switches, or between switches within a data center.

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