Wavelength and networking arrangement method and device for parallel optical modules and medium

Abstract

The invention provides a parallel optical module-oriented wavelength and networking arrangement method and device and a medium, and relates to the technical field of optical communication, and the method comprises the steps: setting 2n optical modules in a parallel optical module networking model, n head ends and n tail ends, and needing 2n optical wavelengths, the sending wavelengths of the 2n optical modules are numbered as lambda 1 to lambda 2n according to the sequence from short to long, and the corresponding optical modules are numbered as optical modules 1 to optical modules 2n; for each optical module m in the 2n optical modules, setting the sending wavelength of the optical module m to be lambda m, and setting the corresponding receiving wavelength to be lambda 2n-m + 1; during networking, the optical module m and the optical module 2n-m + 1 are paired for use. According to the method, the device and the medium, the problems of high process difficulty, low yield, large insertion loss and high cost caused by the fact that a TFF filter in a parallel optical assembly is required to only support an optical signal with a certain specific wavelength to pass through although an existing parallel optical module is relatively flexible in networking can be solved.

Description

Technical Field

[0001] The present invention relates to the field of optical communication technology, and in particular to a wavelength and networking arrangement method, device and medium for parallel optical modules. Background Art

[0002] In order to reduce the complexity of wireless fronthaul technology solutions and reduce the difficulty of maintenance and management, the industry has proposed a parallel optical module solution. Figure 1 As shown, the parallel optical module includes two optical interfaces, an optical uplink port and an optical downlink port. It can directly send the optical signal of the wavelength sent by this module to the optical uplink port, filter out the optical signal that matches the wavelength received by this module from the optical uplink port and directly send it to the optical receiving unit of this module, and forward the optical signal of the remaining wavelength to the optical downlink port, and directly forward the optical signal received by the optical downlink port to the optical uplink port. The above functions of the parallel optical module are mainly realized by the wavelength division multiplexing and demultiplexing components in its parallel optical components. The basic structure of the parallel optical components is shown in Figure 2 As shown, its wavelength division multiplexing and demultiplexing components are realized by combining two groups of TFF (Thin-Film Filter) filters that have the function of filtering the transmission wavelength and receiving wavelength of this module respectively. The transmission wavelength and receiving wavelength of the parallel optical module are different. When used in networking, it is divided into a head-end optical module and a tail-end optical module, and the head-end optical module and the tail-end optical module are used in pairs. The transmission wavelength of the paired optical module head-end module is consistent with the receiving wavelength of the tail-end module, and the receiving wavelength of the head-end module is consistent with the transmission wavelength of the tail-end module. A group of paired head-end optical modules and tail-end optical modules can be networked, or multiple groups of paired head-end optical modules and tail-end optical modules can be networked.

[0003] Since the relevant functions of controlling the transmission direction of optical signals in the parallel optical module are realized through the passive devices of the parallel optical components in the parallel optical module, the operating failure of this module does not affect the normal transmission of the downstream module signal and does not change the transmission rate of the original optical interface signal. When applied to wireless fronthaul, there is no need to add additional equipment, no additional fault nodes, no problems of climbing and maintenance interface division, and the fiber core occupied by the fronthaul can be reduced to 1 core, solving various problems existing in various wireless fronthaul technologies in the existing network.

[0004] With the current technical solution, when parallel optical modules are networked, as long as the transmitting wavelength of the paired head-end module is consistent with the receiving wavelength of the tail-end module, and the receiving wavelength of the head-end module is consistent with the transmitting wavelength of the tail-end module, and multiple sets of paired head-end and tail-end optical modules are networked, the working wavelengths of all optical modules do not conflict. There are no requirements for the selection of the transmitting wavelength and the receiving wavelength of the optical module, and the order of the paired optical modules within the head and tail ends, and they can be flexibly selected and sorted.

[0005] However, although this method is more flexible in networking, it requires that the TFF filters in the parallel optical components only support the passage of optical signals of a specific wavelength. This requires that each TFF filter be designed as a bandpass filter. Bandpass filters are usually composed of different long-wave pass filters. Due to the increase in the number of thin film stacking layers, the product development and production process will be difficult and the yield rate will be low, which will lead to large insertion loss and high cost of the products produced, which is not conducive to the promotion and application of the products. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a wavelength and networking arrangement method, device and medium for parallel optical modules in view of the above-mentioned deficiencies in the prior art, so as to solve the problem that although the existing parallel optical modules are more flexible in networking, the TFF filters in the parallel optical components are required to only support the passage of optical signals of a certain specific wavelength, which easily leads to high process difficulty, low yield, large insertion loss and high cost.

[0007] In a first aspect, the present invention provides a wavelength and networking arrangement method for a parallel optical module, the method comprising:

[0008] It is assumed that the parallel optical module networking model has a total of 2n optical modules, n at the head end and n at the tail end, and a total of 2n optical wavelengths are required. The transmission wavelengths of the 2n optical modules are numbered from λ1 to λ2n in order from short to long, and the corresponding optical modules are numbered from optical module 1 to optical module 2n;

[0009] For each optical module m among the 2n optical modules, the transmission wavelength of the optical module m is set to λm, and the corresponding receiving wavelength is set to λ2n-m+1, where 1≤m≤2n;

[0010] When networking, pair optical module m with optical module 2n-m+1.

[0011] In the networking, according to the networking model, optical modules 1 to n are arranged in order from short to long transmission wavelengths, and optical modules n+1 to 2n are arranged in order from long to short transmission wavelengths.

[0012] Further, the optical modules 1 to n are arranged in order from short to long according to the transmission wavelength according to the networking model, and the optical modules n+1 to 2n are arranged in order from long to short according to the transmission wavelength according to the networking model, specifically including:

[0013] Determine the optical modules that actually participate in the networking application among optical modules 1 to optical modules n and optical modules n+1 to optical modules 2n;

[0014] According to the first networking model, the optical modules from optical module 1 to optical module n that actually participate in the networking application are placed at the head end and arranged in order from short to long according to the transmission wavelength, and the optical modules from optical module n+1 to optical module 2n that actually participate in the networking application are placed at the tail end and arranged in order from long to short according to the transmission wavelength; or,

[0015] According to the second networking model, the optical modules that actually participate in the networking application among optical modules n+1 to optical module 2n are placed at the head end and arranged in sequence from long to short according to the transmission wavelength, and the optical modules that actually participate in the networking application among optical modules 1 to optical module n are placed at the tail end and arranged in sequence from short to long according to the transmission wavelength.

[0016] Furthermore, in networking, the optical uplink port of the first-level optical module at the head end that actually participates in the networking application and the optical uplink port of the first-level optical module at the tail end that actually participates in the networking application are interconnected through a single-core optical cable core. In addition to the first-level optical module, when the optical modules at the head end and the tail end that actually participate in the networking application are interconnected, the optical downlink port of the upper-level optical module and the optical uplink port of the lower-level optical module are interconnected through an optical jumper fiber.

[0017] Furthermore, the method further comprises:

[0018] When designing the parallel optical component of the parallel optical module, a two-stage long-wave pass type thin film filter TFF filtering structure is adopted, and the structural model of the two-stage long-wave pass type TFF filtering structure is the first structural model or the second structural model;

[0019] Among them, in the first structural model, the first-stage TFF filter realizes the coupling of the transmission wavelength and the total reflection of the wavelength received from the optical uplink port, and the second-stage TFF filter realizes the separation of the receiving wavelength and the total reflection of the wavelength received from the optical downlink port;

[0020] In the second structural model, the first-stage TFF filter realizes the separation of the receiving wavelength and the total reflection of the receiving wavelength from the optical uplink port, and the second-stage TFF filter realizes the coupling of the sending wavelength and the total reflection of the receiving wavelength from the optical downlink port.

[0021] Further, if the structural model of the two-stage long-wave pass TFF filter structure is the first structural model, when 1≤m≤n, the cut-off wavelength of the first-stage TFF filter is designed between λm and λm+1, and the cut-off wavelength of the second-stage TFF filter is designed between λ2n-m and λ2n-m+1, and, when n+1≤m≤2n, the cut-off wavelength of the first-stage TFF filter is designed between λm and λm-1, and the cut-off wavelength of the second-stage TFF filter is designed between λ2n-m+1 and λ2n-m+2.

[0022] Further, if the structural model of the two-stage long-wave pass TFF filtering structure is the second structural model, when 1≤m≤n, the cut-off wavelength of the first-stage TFF filtering is designed between λ2n-m and λ2n-m+1, and the cut-off wavelength of the second-stage TFF filtering is designed between λm and λm+1, and, when n+1≤m≤2n, the cut-off wavelength of the first-stage TFF filtering is designed between λ2n-m+1 and λ2n-m+2, and the cut-off wavelength of the second-stage TFF filtering is designed between λm and λm-1.

[0023] Furthermore, for the last-stage optical module in the networking model, the corresponding parallel optical component cancels the second-stage TFF filter in the structural model of the two-stage long-wave pass TFF filter structure, and only retains the first-stage TFF filter.

[0024] In a second aspect, the present invention provides a wavelength and networking arrangement device for a parallel optical module, the device comprising:

[0025] The modules are numbered in sequence, and are used to set a parallel optical module networking model with a total of 2n optical modules, n at the head end and n at the tail end, and a total of 2n optical wavelengths are required. The transmission wavelengths of the 2n optical modules are numbered from λ1 to λ2n in order from short to long, and the corresponding optical modules are numbered from optical module 1 to optical module 2n;

[0026] A wavelength setting module, connected to the sequential numbering module, for setting the transmission wavelength of each optical module m in the 2n optical modules to λm, and the corresponding receiving wavelength to λ2n-m+1, wherein 1≤m≤2n;

[0027] A pairing module, connected to the wavelength setting module, for pairing the optical module m with the optical module 2n-m+1 when networking;

[0028] The networking arrangement module is connected to the pairing module and is used to arrange optical modules 1 to n in sequence from short to long according to the transmission wavelength according to the networking model, and to arrange optical modules n+1 to 2n in sequence from long to short according to the transmission wavelength.

[0029] In a third aspect, the present invention provides a wavelength and networking orchestration device for parallel optical modules, comprising a memory and a processor, wherein the memory stores a computer program, and the processor is configured to run the computer program to implement the wavelength and networking orchestration method for parallel optical modules described in the first aspect above.

[0030] In a fourth aspect, the present invention provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the wavelength and networking arrangement method for parallel optical modules described in the first aspect above is implemented.

[0031] The wavelength and networking arrangement method, device and medium for parallel optical modules provided by the present invention. First, a parallel optical module networking model is set with a total of 2n optical modules, n at the head end and n at the tail end, and a total of 2n optical wavelengths are required. The transmission wavelengths of the 2n optical modules are numbered from short to long as λ1 to λ2n, and the corresponding optical modules are numbered as optical module 1 to optical module 2n; then for each optical module m in the 2n optical modules, the transmission wavelength of the optical module m is set to λm, and the corresponding receiving wavelength is λ2n-m+1, where 1≤m≤2n; then when networking, optical module m is paired with optical module 2n-m+1 for use; finally, in networking, according to the networking model, optical modules 1 to optical module n are arranged in order from short to long according to the transmission wavelength, and optical modules n+1 to optical module 2n are arranged in order from long to short according to the transmission wavelength. The present invention arranges the sending wavelength and receiving wavelength of each optical module in the networking model, as well as the networking order, so that each TFF filter in the parallel optical component can be designed as a long-wave pass filter with lower process complexity, cost and insertion loss. At the same time, it can effectively reduce the number of coating layers of the TFF filter and reduce the insertion loss of the parallel optical component caused by the TFF filter, thereby increasing the optical transmission distance of the parallel optical module networking system, and is also beneficial to increasing the number of parallel devices and extending the distance. In addition, by reducing the difficulty of the TFF filter coating process, the yield rate can be improved and the cost of the optical module can be reduced, which solves the problem that although the existing parallel optical module is more flexible in networking, the TFF filter in the parallel optical component is required to only support the passage of optical signals of a certain specific wavelength, which easily leads to high process difficulty, low yield rate, large insertion loss and high cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of an existing parallel optical module;

[0033] Figure 2 It is a structural schematic diagram of an existing parallel optical component;

[0034] Figure 3 This is a flow chart of a wavelength and networking arrangement method for parallel optical modules according to Embodiment 1 of the present invention;

[0035] Figure 4 This is a first schematic diagram of the wavelength and networking arrangement method of parallel optical modules according to Embodiment 1 of the present invention;

[0036] Figure 5A second schematic diagram of the wavelength and networking arrangement method of parallel optical modules according to Embodiment 1 of the present invention;

[0037] Figure 6 A first schematic diagram of a networking arrangement of six parallel optical modules according to Embodiment 1 of the present invention;

[0038] Figure 7 A second schematic diagram of the networking arrangement of six parallel optical modules according to Embodiment 1 of the present invention;

[0039] Figure 8 Schematic diagram of the basic structure of the parallel optical component structure model 1 of Example 1 of the present invention (when 1≤m≤n);

[0040] Fig. 9 Schematic diagram of the basic structure of the parallel optical component structure model 1 of Example 1 of the present invention (when n+1≤m≤2n);

[0041] Fig.10 This is a basic structural diagram of the parallel optical component structural model 2 of Example 1 of the present invention (when 1≤m≤n);

[0042] Fig.11 This is a basic structural diagram of the parallel optical component structural model 2 of Example 1 of the present invention (when n+1≤m≤2n);

[0043] Fig.12 This is a schematic diagram of the structure of a wavelength and networking arrangement device for parallel optical modules according to Embodiment 2 of the present invention;

[0044] Fig.13 This is a schematic diagram of the structure of a wavelength and networking arrangement device for parallel optical modules according to Embodiment 3 of the present invention. DETAILED DESCRIPTION

[0045] In order to enable those skilled in the art to better understand the technical solution of the present invention, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0046] It should be understood that the specific embodiments and drawings described herein are only used to explain the present invention rather than to limit the present invention.

[0047] It can be understood that, in the absence of conflict, the various embodiments of the present invention and the various features in the embodiments can be combined with each other.

[0048] It can be understood that, for the convenience of description, the drawings of the present invention only show the parts related to the present invention, while the parts irrelevant to the present invention are not shown in the drawings.

[0049] It can be understood that each unit and module involved in the embodiments of the present invention may correspond to only one physical structure, or may be composed of multiple physical structures, or multiple units and modules may be integrated into one physical structure.

[0050] It can be understood that the terms "first", "second", etc. in the embodiments of the present invention are used to distinguish different objects, or to distinguish different processing of the same object, rather than to describe a specific order of objects.

[0051] It can be understood that, without conflict, the functions and steps marked in the flowcharts and block diagrams of the present invention may occur in an order different from that marked in the drawings.

[0052] It is understood that the flowcharts and block diagrams of the present invention illustrate the possible architectures, functions, and operations of the systems, devices, equipment, and methods according to the various embodiments of the present invention. Each box in the flowchart or block diagram may represent a unit, module, program segment, or code, which contains executable instructions for implementing the specified functions. Moreover, each box or combination of boxes in the block diagram and flowchart may be implemented by a hardware-based system that implements the specified functions, or may be implemented by a combination of hardware and computer instructions.

[0053] It can be understood that the units and modules involved in the embodiments of the present invention can be implemented by software or hardware. For example, the units and modules can be located in a processor.

[0054] Application Overview

[0055] At present, when parallel optical modules are networked, as long as the transmission wavelength of the head-end module in the paired optical modules is consistent with the receiving wavelength of the tail-end module, and the receiving wavelength of the head-end module is consistent with the transmission wavelength of the tail-end module, when multiple sets of paired head-end and tail-end optical modules are networked, the working wavelengths of all optical modules do not conflict. There are no requirements for the selection of the transmission wavelength and receiving wavelength of the optical modules, and the order of the paired optical modules in the head-end and tail-end, and they can be flexibly selected and sorted. Figure 2 For example, when the transmission wavelength and receiving wavelength of the head-end module are λa and λi respectively, the transmission wavelength and receiving wavelength of the matching tail-end module should be λi and λa respectively. When multiple groups of paired head-end and tail-end optical modules are networked, λa, λb, λc..., and λi, λj, λk... are all different, and there is no requirement for λa, λb, λc..., and λi, λj, λk... to be arranged in a certain order. However, this requires that each TFF filter in the parallel optical component be designed as a bandpass filter during product development, which will lead to increased insertion loss and cost.

[0056] In response to the above technical problems, the concept of the present application is to provide a wavelength and networking arrangement method, device and medium for parallel optical modules. By arranging the sending wavelength and receiving wavelength of each optical module in the networking model, as well as the networking order, each TFF filter in the parallel optical component can be designed as a long-wave pass filter with lower process complexity, cost and insertion loss. At the same time, it can effectively reduce the number of coating layers of the TFF filter and reduce the insertion loss of the parallel optical component caused by the TFF filter, thereby increasing the optical transmission distance of the parallel optical module networking system, and is also beneficial to increase the number of parallel devices and extend the distance. In addition, by reducing the difficulty of the TFF filter coating process, the yield rate can be improved and the cost of the optical module can be reduced.

[0057] After introducing the basic principles of the present application, various non-limiting embodiments of the present application will be described in detail with reference to the accompanying drawings.

[0058] Embodiment 1:

[0059] This embodiment provides a wavelength and networking arrangement method for parallel optical modules, such as Figure 3 As shown, the method includes:

[0060] Step S101: Set a parallel optical module networking model with a total of 2n optical modules, n at the head end and n at the tail end, and a total of 2n optical wavelengths are required. The transmission wavelengths of the 2n optical modules are numbered from λ1 to λ2n in order from short to long, and the corresponding optical modules are numbered from optical module 1 to optical module 2n.

[0061] In this embodiment, the parallel optical module networking model has 2n optical modules, n at the head end and n at the tail end, and a total of 2n optical wavelengths are required. The transmission wavelengths of the optical modules are λ1, λ2, ... λ2n in order from short to long, and the corresponding optical module numbers are optical module 1, optical module 2, ... optical module 2n.

[0062] Step S102: for each optical module m among the 2n optical modules, the transmission wavelength of the optical module m is set to λm, and the corresponding receiving wavelength is set to λ2n-m+1, wherein 1≤m≤2n.

[0063] In this embodiment, the transmission wavelength and receiving wavelength of optical module 1, optical module 2, ... optical module 2n are selected according to the principle of pairing the shortest wavelength with the longest wavelength, the second shortest wavelength with the second longest wavelength, ... the longest wavelength with the shortest wavelength, that is, λ1 and λ2n, λ2 and λ2n-1, ... λ2n and λ1 are selected respectively. Assuming 1≤m≤2n, when the transmission wavelength of the optical module is λm, its receiving wavelength should be selected to be paired with λ2n-m+1.

[0064] Step S103: when networking, pair the optical module m with the optical module 2n-m+1 for use.

[0065] In this embodiment, when networking, the optical module with the shortest wavelength is paired with the longest wavelength, the optical module with the second shortest wavelength is paired with the second long wavelength, etc., that is, optical module 1 is paired with optical module 2n, optical module 2 is paired with optical module 2n-1, and optical module n is paired with optical module n+1, forming a total of n pairs of paired optical modules. If 1≤m≤2n, optical module m should be paired with optical module 2n-m+1.

[0066] Step S104: In networking, according to the networking model, optical modules 1 to n are arranged in sequence according to the transmission wavelength from short to long, and optical modules n+1 to 2n are arranged in sequence according to the transmission wavelength from long to short.

[0067] In this embodiment, according to the networking model, the arrangement order of optical module 1 to optical module n is optical module 1, optical module 2...optical module n, that is, they are arranged in order from short to long according to the transmission wavelength of the optical modules, and the arrangement order of optical module n+1 to optical module 2n is optical module 2n, optical module 2n-1...optical module n+1, that is, they are arranged in order from long to short according to the transmission wavelength of the optical modules.

[0068] Optionally, arranging optical modules 1 to n in order from short to long according to the transmission wavelengths according to the networking model, and arranging optical modules n+1 to 2n in order from long to short according to the transmission wavelengths according to the networking model specifically includes:

[0069] Determine the optical modules that actually participate in the networking application among optical modules 1 to optical modules n and optical modules n+1 to optical modules 2n;

[0070] According to the first networking model, the optical modules from optical module 1 to optical module n that actually participate in the networking application are placed at the head end and arranged in order from short to long according to the transmission wavelength, and the optical modules from optical module n+1 to optical module 2n that actually participate in the networking application are placed at the tail end and arranged in order from long to short according to the transmission wavelength; or,

[0071] According to the second networking model, the optical modules that actually participate in the networking application among optical modules n+1 to optical module 2n are placed at the head end and arranged in sequence from long to short according to the transmission wavelength, and the optical modules that actually participate in the networking application among optical modules 1 to optical module n are placed at the tail end and arranged in sequence from short to long according to the transmission wavelength.

[0072] In this embodiment, optical module 1, optical module 2, ... optical module n can be used at the head end, and optical module n+1, optical module n+2, ... optical module 2n can be used at the tail end, or optical module n+1, optical module n+2, ... optical module 2n can be used at the head end, and optical module 1, optical module 2, ... optical module n can be used at the tail end. When there are n pairs of optical modules actually participating in the networking application, at the head end or the tail end, the arrangement order of optical modules 1 to optical modules n is optical module 1, optical module 2, ... optical module n, and at the tail end or the head end, the arrangement order of optical modules n+1 to optical modules 2n is optical module 2n, optical module 2n-1, ... optical module n+1; when there are less than n pairs of optical modules actually participating in the networking application, at the head end and / or the tail end, the optical modules that do not participate in the networking in the standard model are first deducted, and the remaining optical modules are then arranged in order from short to long or from long to short according to the transmission wavelength of the optical modules.

[0073] Optionally, in networking, the optical uplink port of the first-level optical module at the head end that actually participates in the networking application and the optical uplink port of the first-level optical module at the tail end that actually participates in the networking application are interconnected through a single-core optical cable core. In addition to the first-level optical module, when the optical modules at the head end and the tail end that actually participate in the networking application are interconnected, the optical downlink port of the upper-level optical module and the optical uplink port of the lower-level optical module are interconnected through an optical jumper fiber.

[0074] In this embodiment, it is assumed that optical module 1, optical module 2, ... optical module n are used at the head end, and optical module n+1, optical module n+2, ... optical module 2n are used at the tail end, and when there are n pairs of optical modules actually participating in the networking application, the optical uplink port of the first-level optical module at the head end and the optical uplink port of the first-level optical module at the tail end are interconnected through a single-core optical cable core, that is, the optical uplink port of optical module 1 at the head end and the optical uplink port of optical module 2n at the tail end are interconnected through a single-core optical cable core. Then, in the order of arrangement, at the head end, the optical downlink port of the upper-level optical module and the optical uplink port of the lower-level optical module are interconnected through optical jump fibers, that is, the optical downlink port of optical module 1 and the optical uplink port of optical module 2 are interconnected through optical jump fibers, the optical downlink port of optical module 2 and the optical uplink port of optical module 3 are interconnected through optical jump fibers, ... the optical downlink port of optical module n-1 and the optical uplink port of optical module n are interconnected through optical jump fibers. At the tail end, the optical downlink port of the upper-level optical module is interconnected with the optical uplink port of the lower-level optical module through an optical jumper fiber, that is, the optical downlink port of optical module 2n is interconnected with the optical uplink port of optical module 2n-1 through an optical jumper fiber, the optical downlink port of optical module 2n-1 is interconnected with the optical uplink port of optical module 2n-2 through an optical jumper fiber...the optical downlink port of optical module n+2 is interconnected with the optical uplink port of optical module n+1 through an optical jumper fiber.

[0075] Optionally, the method further comprises:

[0076] When designing the parallel optical component of the parallel optical module, a two-stage long-wave pass type thin film filter TFF filtering structure is adopted, and the structural model of the two-stage long-wave pass type TFF filtering structure is the first structural model or the second structural model;

[0077] Among them, in the first structural model, the first-stage TFF filter realizes the coupling of the transmission wavelength and the total reflection of the wavelength received from the optical uplink port, and the second-stage TFF filter realizes the separation of the receiving wavelength and the total reflection of the wavelength received from the optical downlink port;

[0078] In the second structural model, the first-stage TFF filter realizes the separation of the receiving wavelength and the total reflection of the receiving wavelength from the optical uplink port, and the second-stage TFF filter realizes the coupling of the sending wavelength and the total reflection of the receiving wavelength from the optical downlink port.

[0079] Specifically, if the structural model of the two-stage long-wave pass TFF filtering structure is the first structural model, when 1≤m≤n, the cut-off wavelength of the first-stage TFF filtering is designed between λm and λm+1, and the cut-off wavelength of the second-stage TFF filtering is designed between λ2n-m and λ2n-m+1, and, when n+1≤m≤2n, the cut-off wavelength of the first-stage TFF filtering is designed between λm and λm-1, and the cut-off wavelength of the second-stage TFF filtering is designed between λ2n-m+1 and λ2n-m+2.

[0080] Specifically, if the structural model of the two-stage long-wave pass TFF filtering structure is the second structural model, when 1≤m≤n, the cut-off wavelength of the first-stage TFF filtering is designed between λ2n-m and λ2n-m+1, and the cut-off wavelength of the second-stage TFF filtering is designed between λm and λm+1, and, when n+1≤m≤2n, the cut-off wavelength of the first-stage TFF filtering is designed between λ2n-m+1 and λ2n-m+2, and the cut-off wavelength of the second-stage TFF filtering is designed between λm and λm-1.

[0081] Optionally, for the last-stage optical module in the networking model, the corresponding parallel optical component cancels the second-stage TFF filter in the structural model of the two-stage long-wave pass TFF filter structure, and only retains the first-stage TFF filter.

[0082] In this embodiment, for the last-stage optical module in the networking model, its parallel optical component can cancel the second-stage TFF filtering in the above two parallel optical component structure models, and only retain the first-stage TFF filtering.

[0083] It should be noted that, in order to address the problems of high process difficulty, low yield, large insertion loss and high cost caused by the original technical solution of parallel optical modules, the present invention arranges the sending wavelength and receiving wavelength of each optical module in the networking model, as well as the networking order, and realizes a method of controlling the transmission direction of optical signals according to the functional requirements of the parallel optical module by using a long-wave pass filter, thereby effectively reducing the process difficulty of the product in development and production, improving the product yield, reducing insertion loss, effectively reducing the product production cost, improving product performance, and facilitating the application and promotion of the product.

[0084] In a specific embodiment, a method for arranging the working wavelength and networking of the head-end and tail-end optical modules is provided, so that each TFF filter in the parallel optical component can be designed as a long-wave pass filter with lower process complexity, cost and insertion loss, and the control function of the parallel optical module on the transmission direction of the optical signal is realized. The wavelength and networking arrangement method for the parallel optical module can include the following steps:

[0085] S1. Wavelength arrangement method

[0086] Assume that the parallel optical module networking model has 2n optical modules, n at the head end and n at the tail end, and a total of 2n optical wavelengths are required. Assume that the transmission wavelengths of the optical modules are λ1, λ2, ... λ2n in order from short to long, and the corresponding optical module numbers are optical module 1, optical module 2, ... optical module 2n. Then Figure 4 and Figure 5 As shown, the wavelength arrangement method is as follows:

[0087] (1) The transmission wavelength and receiving wavelength of optical module 1, optical module 2, ... optical module 2n are selected according to the principle of pairing the shortest wavelength with the longest wavelength, the second shortest wavelength with the second longest wavelength, ... the longest wavelength with the shortest wavelength, that is, they are selected according to λ1 and λ2n, λ2 and λ2n-1, ... λ2n and λ1, respectively. Assuming 1≤m≤2n, when the transmission wavelength of the optical module is λm, its receiving wavelength should be selected to be paired with λ2n-m+1.

[0088] (2) When networking, optical modules with the shortest transmission wavelength are paired with those with the longest transmission wavelength, optical modules with the second shortest transmission wavelength are paired with those with the second longest transmission wavelength, etc., that is, optical module 1 is paired with optical module 2n, optical module 2 is paired with optical module 2n-1, etc., optical module n is paired with optical module n+1, and a total of n pairs of paired optical modules are formed. Assuming 1≤m≤2n, optical module m should be paired with optical module 2n-m+1.

[0089] (3) In networking, optical module 1, optical module 2, ... optical module n can be used at the head end, and optical module n+1, optical module n+2, ... optical module 2n can be used at the tail end, such as Figure 4 As shown; optical module n+1, optical module n+2... optical module 2n can also be used at the head end, and optical module 1, optical module 2... optical module n can be used at the tail end, such as Figure 5 shown.

[0090] Take the networking model composed of 6 parallel optical modules as an example. Assume that the transmission wavelengths are λ1, λ2, ... λ6 in order from short to long, and the corresponding optical modules are numbered as optical module 1, optical module 2, ... optical module 6. Figure 6 and Figure 7 As shown, the wavelengths are arranged as follows:

[0091] ① The transmitting wavelength and receiving wavelength of optical module 1, optical module 2, ..., optical module 6 are selected as λ1 and λ6, λ2 and λ5, λ3 and λ4, λ4 and λ3, λ5 and λ2, λ6 and λ1 respectively.

[0092] ② When networking, optical module 1 and optical module 6 are used in pairs, optical module 2 and optical module 3 are used in pairs, and optical module 3 and optical module 4 are used in pairs, forming a total of 3 pairs of paired optical modules.

[0093] ③ In the network, optical module 1, optical module 2, and optical module 3 can be used at the head end, and optical module 4, optical module 5, and optical module 6 can be used at the tail end. Figure 6 As shown; optical module 4, optical module 5, optical module 6 can also be used at the head end, and optical module 1, optical module 2, optical module 3 can be used at the tail end, such as Figure 7 shown.

[0094] S2. Networking model

[0095] After pairing the optical modules according to the above wavelength arrangement method, there are two networking models.

[0096] Network model 1: Optical module 1, optical module 2...optical module n are used at the head end, and optical module n+1, optical module n+2...optical module 2n are used at the tail end. Figure 4 As shown in the figure, the network arrangement method is as follows:

[0097] (1) The optical uplink port of the first-stage optical module at the head end is interconnected with the optical uplink port of the first-stage optical module at the tail end through a single-core optical cable core, that is, the optical uplink port of the optical module 1 at the head end is interconnected with the optical uplink port of the optical module 2n at the tail end through a single-core optical cable core.

[0098] (2) At the head end, the optical modules are arranged in the order of optical module 1, optical module 2, ... optical module n, that is, they are arranged in order from short to long according to the transmission wavelength of the optical modules. According to the arrangement order, the optical downlink port of the upper-level optical module is interconnected with the optical uplink port of the lower-level optical module through an optical jumper fiber, that is: the optical downlink port of optical module 1 is interconnected with the optical uplink port of optical module 2 through an optical jumper fiber, the optical downlink port of optical module 2 is interconnected with the optical uplink port of optical module 3 through an optical jumper fiber, ... the optical downlink port of optical module n-1 is interconnected with the optical uplink port of optical module n through an optical jumper fiber.

[0099] (3) At the tail end, the optical modules are arranged in the order of optical module 2n, optical module 2n-1, ... optical module n+1, that is, they are arranged in order from long to short according to the transmission wavelength of the optical modules. According to the arrangement order, the optical downlink port of the upper-level optical module is interconnected with the optical uplink port of the lower-level optical module through an optical jumper fiber, that is, the optical downlink port of optical module 2n is interconnected with the optical uplink port of optical module 2n-1 through an optical jumper fiber, the optical downlink port of optical module 2n-1 is interconnected with the optical uplink port of optical module 2n-2 through an optical jumper fiber, ... the optical downlink port of optical module n+2 is interconnected with the optical uplink port of optical module n+1 through an optical jumper fiber.

[0100] Taking the networking model composed of 6 parallel optical modules as an example, optical modules 1, 2, and 3 are used at the head end, and optical modules 4, 5, and 6 are used at the tail end. Figure 6 As shown in the figure, the network arrangement is as follows:

[0101] ① The optical uplink port of the optical module 1 at the head end and the optical uplink port of the optical module 6 at the tail end are interconnected through a 1-core optical cable core.

[0102] ② At the head end, the optical downlink port of optical module 1 and the optical uplink port of optical module 2 are interconnected through an optical jumper fiber, and the optical downlink port of optical module 2 and the optical uplink port of optical module 3 are interconnected through an optical jumper fiber.

[0103] ③ At the tail end, the optical downlink port of optical module 6 is interconnected with the optical uplink port of optical module 5 through an optical jumper fiber, and the optical downlink port of optical module 5 is interconnected with the optical uplink port of optical module 4 through an optical jumper fiber.

[0104] In this networking model, when the number of optical modules actually involved in the networking application is less than that in the above standard model, that is, when the number of optical modules involved in the networking is less than n pairs, the networking arrangement method is as follows:

[0105] 1) At the head end, excluding the optical modules that do not participate in the networking in the standard model, the remaining optical modules are still arranged in order from short to long according to the transmission wavelength of the optical modules, and in the order of arrangement, the optical downlink port of the upper-level optical module is interconnected with the optical uplink port of the next-level optical module through optical jumper fibers. For example: if optical module 1 does not participate in the networking, the order of the optical modules during networking is optical module 2, optical module 3...optical module n, the optical downlink port of optical module 2 is interconnected with the optical uplink port of optical module 3 through optical jumper fibers, the optical downlink port of optical module 3 is interconnected with the optical uplink port of optical module 4 through optical jumper fibers...the optical downlink port of optical module n-1 is interconnected with the optical uplink port of optical module n through optical jumper fibers; if optical module 2 does not participate in the networking, the order of the optical modules during networking is optical module 1, optical module 3...optical module n, the optical downlink port of optical module 1 is interconnected with the optical uplink port of optical module 3 through optical jumper fibers The optical downlink port of optical module 3 and the optical uplink port of optical module 4 are interconnected through optical jump fibers...the optical downlink port of optical module n-1 and the optical uplink port of optical module n are interconnected through optical jump fibers; if optical module n does not participate in networking, the arrangement order of the optical modules in the networking is optical module 1, optical module 2...optical module n-1, the optical downlink port of optical module 1 and the optical uplink port of optical module 2 are interconnected through optical jump fibers, the optical downlink port of optical module 2 and the optical uplink port of optical module 3 are interconnected through optical jump fibers...the optical downlink port of optical module n-2 and the optical uplink port of optical module n-1 are interconnected through optical jump fibers.

[0106] 2) At the tail end, excluding the optical modules that do not participate in the networking in the standard model, the remaining optical modules are still arranged in order from long to short according to the transmission wavelength of the optical modules, and in the order of arrangement, the optical downlink port of the upper-level optical module is interconnected with the optical uplink port of the next-level optical module through optical jumper fibers. For example: if optical module 2n does not participate in the networking, the order of arrangement of the optical modules during networking is optical module 2n-1, optical module 2n-2...optical module n+1, the optical downlink port of optical module 2n-1 is interconnected with the optical uplink port of optical module 2n-2 through optical jumper fibers, the optical downlink port of optical module 2n-2 is interconnected with the optical uplink port of optical module 2n-3 through optical jumper fibers...the optical downlink port of optical module n+2 is interconnected with the optical uplink port of optical module n+1 through optical jumper fibers; if optical module 2n-1 does not participate in the networking, the order of arrangement of the optical modules during networking is optical module 2n, optical module 2n-2...optical module n+1, the optical downlink port of optical module 2n is interconnected with the optical uplink port of optical module 2n-2 through optical jumper fibers, The optical uplink ports are interconnected through optical jumper fibers, the optical downlink port of optical module 2n-2 is interconnected with the optical uplink port of optical module 2n-3 through optical jumper fibers...the optical downlink port of optical module n+2 is interconnected with the optical uplink port of optical module n+1 through optical jumper fibers; if optical module n+1 does not participate in networking, the optical modules are arranged in the order of optical module 2n, optical module 2n-1...optical module n+2 during networking, the optical downlink port of optical module 2n is interconnected with the optical uplink port of optical module 2n-1 through optical jumper fibers, the optical downlink port of optical module 2n-1 is interconnected with the optical uplink port of optical module 2n-2 through optical jumper fibers...the optical downlink port of optical module n+3 is interconnected with the optical uplink port of optical module n+2 through optical jumper fibers.

[0107] 3) Excluding the optical modules that do not participate in the networking in the standard model, the optical uplink port of the first-level optical module at the head end participating in the networking and the optical uplink port of the first-level optical module at the tail end participating in the networking are interconnected through a single-core optical cable core. For example: if optical module 1 and optical module 2n do not participate in the networking, the optical uplink port of optical module 2 at the head end and the optical uplink port of optical module 2n-1 at the tail end are interconnected through a single-core optical cable core; if one or more pairs of optical modules among optical modules 2~n and optical modules 2n-1~n+1 do not participate in the networking, the optical uplink port of optical module 1 at the head end and the optical uplink port of optical module 2n at the tail end are still interconnected through a single-core optical cable core.

[0108] Network model 2: Optical module n+1, optical module n+2...optical module 2n are used at the head end, and optical module 1, optical module 2...optical module n are used at the tail end. Figure 5 As shown in the figure, the network arrangement method is as follows:

[0109] (1) The optical uplink port of the optical module 2n at the head end is interconnected with the optical uplink port of the optical module 1 at the tail end through a single-core optical cable core.

[0110] (2) At the head end, the optical modules are arranged in the order of optical module 2n, optical module 2n-1, ... optical module n+1. The optical downlink port of optical module 2n is interconnected with the optical uplink port of optical module 2n-1 via an optical jumper fiber. The optical downlink port of optical module 2n-1 is interconnected with the optical uplink port of optical module 2n-2 via an optical jumper fiber. ... The optical downlink port of optical module n+2 is interconnected with the optical uplink port of optical module n+1 via an optical jumper fiber.

[0111] (3) At the tail end, the optical modules are arranged in the order of optical module 1, optical module 2, ... optical module n. The optical downlink port of optical module 1 is interconnected with the optical uplink port of optical module 2 via an optical patch fiber. The optical downlink port of optical module 2 is interconnected with the optical uplink port of optical module 3 via an optical patch fiber. ... The optical downlink port of optical module n-1 is interconnected with the optical uplink port of optical module n via an optical patch fiber.

[0112] Taking the networking model composed of 6 parallel optical modules as an example, optical modules 4, 5, and 6 are used at the head end, and optical modules 1, 2, and 3 are used at the tail end. Figure 7 As shown in the figure, the network arrangement is as follows:

[0113] ① The optical uplink port of the optical module 6 at the head end and the optical uplink port of the optical module 1 at the tail end are interconnected through a single-core optical cable core.

[0114] ② At the head end, the optical downlink port of optical module 1 and the optical uplink port of optical module 2 are interconnected through an optical jumper fiber, and the optical downlink port of optical module 2 and the optical uplink port of optical module 3 are interconnected through an optical jumper fiber.

[0115] ③ At the tail end, the optical downlink port of optical module 6 is interconnected with the optical uplink port of optical module 5 through an optical jumper fiber, and the optical downlink port of optical module 5 is interconnected with the optical uplink port of optical module 4 through an optical jumper fiber.

[0116] In this networking model, when the number of optical modules actually involved in the networking application is less than that in the above standard model, that is, when the number of optical modules involved in the networking is less than n pairs, the networking arrangement method is as follows:

[0117] 1) At the head end, excluding the optical modules that do not participate in the networking in the standard model, the remaining optical modules are still arranged in order from long to short according to the transmission wavelength of the optical modules, and in the order of arrangement, the optical downlink port of the upper-level optical module is interconnected with the optical uplink port of the next-level optical module through optical jumper fibers. For example: if optical module 2n does not participate in the networking, the order of arrangement of the optical modules during networking is optical module 2n-1, optical module 2n-2...optical module n+1, the optical downlink port of optical module 2n-1 is interconnected with the optical uplink port of optical module 2n-2 through optical jumper fibers, the optical downlink port of optical module 2n-2 is interconnected with the optical uplink port of optical module 2n-3 through optical jumper fibers...the optical downlink port of optical module n+2 is interconnected with the optical uplink port of optical module n+1 through optical jumper fibers; if optical module 2n-1 does not participate in the networking, the order of arrangement of the optical modules during networking is optical module 2n, optical module 2n-2...optical module n+1, the optical downlink port of optical module 2n is interconnected with the optical uplink port of optical module 2n-2 through optical jumper fibers, The optical uplink ports are interconnected through optical jumper fibers, the optical downlink port of optical module 2n-2 is interconnected with the optical uplink port of optical module 2n-3 through optical jumper fibers...the optical downlink port of optical module n+2 is interconnected with the optical uplink port of optical module n+1 through optical jumper fibers; if optical module n+1 does not participate in networking, the optical modules are arranged in the order of optical module 2n, optical module 2n-1...optical module n+2 during networking, the optical downlink port of optical module 2n is interconnected with the optical uplink port of optical module 2n-1 through optical jumper fibers, the optical downlink port of optical module 2n-1 is interconnected with the optical uplink port of optical module 2n-2 through optical jumper fibers...the optical downlink port of optical module n+3 is interconnected with the optical uplink port of optical module n+2 through optical jumper fibers.

[0118] 2) At the tail end, excluding the optical modules that do not participate in the networking in the standard model, the remaining optical modules are still arranged in order from short to long according to the transmission wavelength of the optical modules, and in the order of arrangement, the optical downlink port of the upper-level optical module is interconnected with the optical uplink port of the next-level optical module through optical jumper fibers. For example: if optical module 1 does not participate in the networking, the order of the optical modules in the networking is optical module 2, optical module 3...optical module n, the optical downlink port of optical module 2 is interconnected with the optical uplink port of optical module 3 through optical jumper fibers, the optical downlink port of optical module 3 is interconnected with the optical uplink port of optical module 4 through optical jumper fibers...the optical downlink port of optical module n-1 is interconnected with the optical uplink port of optical module n through optical jumper fibers; if optical module 2 does not participate in the networking, the order of the optical modules in the networking is optical module 1, optical module 3...optical module n, the optical downlink port of optical module 1 is interconnected with the optical uplink port of optical module 3 through optical jumper fibers The optical downlink port of optical module 3 and the optical uplink port of optical module 4 are interconnected through optical jump fibers...the optical downlink port of optical module n-1 and the optical uplink port of optical module n are interconnected through optical jump fibers; if optical module n does not participate in networking, the arrangement order of the optical modules in the networking is optical module 1, optical module 2...optical module n-1, the optical downlink port of optical module 1 and the optical uplink port of optical module 2 are interconnected through optical jump fibers, the optical downlink port of optical module 2 and the optical uplink port of optical module 3 are interconnected through optical jump fibers...the optical downlink port of optical module n-2 and the optical uplink port of optical module n-1 are interconnected through optical jump fibers.

[0119] 3) Excluding the optical modules that do not participate in the networking in the standard model, the optical uplink port of the first-level optical module at the head end participating in the networking and the optical uplink port of the first-level optical module at the tail end participating in the networking are interconnected through a single-core optical cable core. For example: if optical module 2n and optical module 1 do not participate in the networking, the optical uplink port of optical module 2n-1 at the head end and the optical uplink port of optical module 2 at the tail end are interconnected through a single-core optical cable core; if one or more pairs of optical modules among optical modules 2n-1~n+1 and optical modules 2~n do not participate in the networking, the optical uplink port of optical module 2n at the head end and the optical uplink port of optical module 1 at the tail end are still interconnected through a single-core optical cable core.

[0120] S3. Parallel optical component structure model and optical signal transmission process

[0121] According to the wavelength and networking arrangement method of the above parallel optical module, the parallel optical component adopts a two-stage long-wave pass TFF filtering structure, and there are two structural models.

[0122] Parallel optical component structure model 1 (also known as the first structure model): The first-level TFF filter realizes the coupling of the transmission wavelength and the total reflection of the receiving wavelength from the optical uplink port, and the second-level TFF filter realizes the separation of the receiving wavelength and the total reflection of the receiving wavelength from the optical downlink port. For optical module m, its transmission wavelength is λm and the receiving wavelength is λ2n-m+1.

[0123] 1) When 1≤m≤n, the cutoff wavelength of the first-stage TFF filter is designed to be between λm and λm+1, so that all optical signals with incident wavelength ≥λm+1 are transmitted and all optical signals with incident wavelength ≤λm are reflected; the cutoff wavelength of the second-stage TFF filter is designed to be between λ2n-m and λ2n-m+1, so that all optical signals with incident wavelength ≥λ2n-m+1 are transmitted and all optical signals with incident wavelength ≤λ2n-m are reflected.

[0124] by Figure 8 Taking the basic structure shown as an example, the optical signal transmission process is as follows:

[0125] ① The optical signal with a wavelength of λm sent by the optical sending unit is totally reflected by the first-level TFF filter to the optical uplink port;

[0126] ② According to the previous networking arrangement method, the optical signals of λ2n-m+2 to λ2n have been separated by the upstream optical module. Therefore, the wavelengths of the optical signals received from the optical uplink port are λn+1 to λ2n-m+1. They are first transmitted to the second-stage TFF filter after passing through the first-stage TFF filter. Then, the optical signals of the wavelength of λ2n-m+1 are transmitted to the optical receiving unit after passing through the second-stage TFF filter, and the optical signals of λn+1 to λ2n-m are totally reflected to the optical downlink port.

[0127] ③ According to the previous networking arrangement method, the wavelength of the optical signal received from the optical downlink port is λm+1~λn, which is first reflected to the first-level TFF filter through the second-level TFF filter, and then transmitted to the optical uplink port through the first-level TFF filter.

[0128] 2) When n+1≤m≤2n, the cutoff wavelength of the first-stage TFF filter is designed to be between λm and λm-1, so that all optical signals with incident wavelengths ≥λm are transmitted and all optical signals with incident wavelengths ≤λm-1 are reflected; the cutoff wavelength of the second-stage TFF filter is designed to be between λ2n-m+1 and λ2n-m+2, so that all optical signals with incident wavelengths ≥λ2n-m+2 are transmitted and all optical signals with incident wavelengths ≤λ2n-m+1 are reflected. Fig. 9 Taking the basic structure shown as an example, the optical signal transmission process is as follows:

[0129] ① The optical signal with a wavelength of λm sent by the optical sending unit is totally reflected by the first-level TFF filter to the optical uplink port;

[0130] ② According to the previous networking arrangement method, the optical signals of λ1~λ2n-m have been separated by the upstream optical module. Therefore, the wavelength of the optical signal received from the optical uplink port is λ2n-m+1~λn. It is first reflected to the second-stage TFF filter after passing through the first-stage TFF filter. Then, after passing through the second-stage TFF filter, the optical signal of the wavelength of λ2n-m+1 is reflected to the optical receiving unit, and the optical signal of λ2n-m+2~λn is fully transmitted to the optical downlink port.

[0131] ③ According to the previous networking arrangement method, the wavelength of the optical signal received from the optical downlink port is λn+1~λm-1, which is first transmitted to the first-level TFF filter through the second-level TFF filter, and then reflected to the optical uplink port through the first-level TFF filter.

[0132] Parallel optical component structure model 2 (also known as the second structure model): The first-level TFF filter realizes the separation of the receiving wavelength and the total reflection of the wavelength received from the optical uplink port, and the second-level TFF filter realizes the coupling of the sending wavelength and the total reflection of the wavelength received from the optical downlink port. For optical module m, its sending wavelength is λm and the receiving wavelength is λ2n-m+1.

[0133] 1) When 1≤m≤n, the cutoff wavelength of the first-stage TFF filter is designed to be between λ2n-m and λ2n-m+1, so that all optical signals with incident wavelengths ≥λ2n-m+1 are fully transmitted and all optical signals with incident wavelengths ≤λ2n-m are fully reflected; the cutoff wavelength of the second-stage TFF filter is designed to be between λm and λm+1, so that all optical signals with incident wavelengths ≥λm+1 are fully transmitted and all optical signals with incident wavelengths ≤λm are fully reflected. Fig.10 Taking the basic structure shown as an example, the optical signal transmission process is as follows:

[0134] ① According to the previous networking arrangement method, the optical signals of λ2n-m+2 to λ2n have been separated by the upstream optical module. Therefore, the wavelength of the optical signal received from the optical uplink port is λn+1 to λ2n-m+1. The optical signal of wavelength λ2n-m+1 is first transmitted to the optical receiving unit through the first-stage TFF filter, and the optical signal of λn+1 to λ2n-m is totally reflected to the second-stage TFF filter, and then all transmitted to the optical downlink port through the second-stage TFF filter;

[0135] ② The optical signal with a wavelength of λm sent by the optical sending unit is first totally reflected by the second-stage TFF filter to the first-stage TFF filter, and then totally reflected by the first-stage TFF filter to the optical uplink port;

[0136] ③ According to the previous networking arrangement method, the wavelength of the optical signal received from the optical downlink port is λm+1~λn, which is first transmitted to the first-level TFF filter through the second-level TFF filter, and then reflected to the optical uplink port through the first-level TFF filter.

[0137] 2) When n+1≤m≤2n, the cutoff wavelength of the first-stage TFF filter is designed to be between λ2n-m+1 and λ2n-m+2, so that all optical signals with incident wavelengths ≥λ2n-m+2 are fully transmitted and all optical signals with incident wavelengths ≤λ2n-m+1 are fully reflected; the cutoff wavelength of the second-stage TFF filter is designed to be between λm and λm-1, so that all optical signals with incident wavelengths ≥λm are fully transmitted and all optical signals with incident wavelengths ≤λm-1 are fully reflected. Fig.11 Taking the basic structure shown as an example, the optical signal transmission process is as follows:

[0138] ① According to the previous networking arrangement method, the optical signals of λ1~λ2n-m have been separated by the upstream optical module, so the wavelength of the optical signal received from the optical uplink port is λ2n-m+1~λn. The optical signal of wavelength λ2n-m+1 is first reflected to the optical receiving unit through the first-stage TFF filter, and the optical signals of wavelength λ2n-m+2~λn are fully transmitted to the second-stage TFF filter, and then fully reflected to the optical downlink port through the second-stage TFF filter;

[0139] ② The optical signal with a wavelength of λm sent by the optical sending unit is first fully transmitted through the second-stage TFF filter to the first-stage TFF filter, and then fully transmitted through the first-stage TFF filter to the optical uplink port;

[0140] ③ According to the previous networking arrangement method, the wavelength of the optical signal received from the optical downlink port is λn+1~λm-1, which is first reflected to the first-level TFF filter through the second-level TFF filter, and then transmitted to the optical uplink port through the first-level TFF filter.

[0141] For the last-stage optical module in the two networking models of the present invention, the parallel optical component can cancel the second-stage TFF filtering in the above two parallel optical component structure models, and only retain the first-stage TFF filtering.

[0142] It should be noted that, by adopting the wavelength and networking arrangement method for parallel optical modules provided by the present invention, long-wave pass filters can be used to design and produce parallel optical components, which brings the following beneficial effects:

[0143] (a) It can effectively reduce the number of coating layers of TFF filters, reduce the insertion loss of parallel optical components caused by TFF filters, effectively increase the optical transmission distance of parallel optical module networking systems, and facilitate the increase in the number of parallel devices and the extension of distance.

[0144] (b) Reduce the difficulty of TFF filter coating process, improve the yield rate, and reduce the cost of optical modules.

[0145] The wavelength and networking arrangement method for parallel optical modules provided in an embodiment of the present invention first sets a parallel optical module networking model with a total of 2n optical modules, n at the head end and n at the tail end, and a total of 2n optical wavelengths are required. The sending wavelengths of the 2n optical modules are numbered λ1 to λ2n in order from short to long, and the corresponding optical modules are numbered as optical module 1 to optical module 2n; then, for each optical module m in the 2n optical modules, the sending wavelength of the optical module m is set to λm, and the corresponding receiving wavelength is λ2n-m+1, wherein 1≤m≤2n; then, when networking, the optical module m is paired with the optical module 2n-m+1; finally, in the networking, according to the networking model, optical modules 1 to optical modules n are arranged in sequence from short to long according to the sending wavelength, and optical modules n+1 to optical modules 2n are arranged in sequence from long to short according to the sending wavelength. The present invention arranges the sending wavelength and receiving wavelength of each optical module in the networking model, as well as the networking order, so that each TFF filter in the parallel optical component can be designed as a long-wave pass filter with lower process complexity, cost and insertion loss. At the same time, it can effectively reduce the number of coating layers of the TFF filter and reduce the insertion loss of the parallel optical component caused by the TFF filter, thereby increasing the optical transmission distance of the parallel optical module networking system, and is also beneficial to increasing the number of parallel devices and extending the distance. In addition, by reducing the difficulty of the TFF filter coating process, the yield rate can be improved and the cost of the optical module can be reduced, which solves the problem that although the existing parallel optical module is more flexible in networking, the TFF filter in the parallel optical component is required to only support the passage of optical signals of a certain specific wavelength, which easily leads to high process difficulty, low yield rate, large insertion loss and high cost.

[0146] Embodiment 2:

[0147] like Fig.12 As shown, this embodiment provides a wavelength and networking arrangement device for a parallel optical module, which is used to execute the wavelength and networking arrangement method for the parallel optical module, including:

[0148] The module 11 is numbered in sequence, and is used to set a parallel optical module networking model with a total of 2n optical modules, n at the head end and n at the tail end, and a total of 2n optical wavelengths are required. The transmission wavelengths of the 2n optical modules are numbered from λ1 to λ2n in order from short to long, and the corresponding optical modules are numbered from optical module 1 to optical module 2n;

[0149] The wavelength setting module 12 is connected to the sequential numbering module 11, and is used to set the transmission wavelength of each optical module m in the 2n optical modules to λm, and the corresponding receiving wavelength to λ2n-m+1, wherein 1≤m≤2n;

[0150] A pairing module 13, connected to the wavelength setting module 12, is used to pair the optical module m with the optical module 2n-m+1 when networking;

[0151] The networking arrangement module 14 is connected to the pairing use module 13, and is used to arrange the optical modules 1 to n in sequence from short to long according to the transmission wavelength, and to arrange the optical modules n+1 to 2n in sequence from long to short according to the transmission wavelength in the networking according to the networking model.

[0152] Optionally, the networking orchestration module 14 includes:

[0153] An actual optical module determination unit, used to determine the optical modules that actually participate in the networking application among optical modules 1 to optical modules n and optical modules n+1 to optical modules 2n;

[0154] A networking arrangement unit is used to place the optical modules actually participating in the networking application from optical modules 1 to optical modules n at the head end according to the first networking model, and arrange them in sequence from short to long according to the transmission wavelength, and to place the optical modules actually participating in the networking application from optical modules n+1 to optical modules 2n at the tail end, and arrange them in sequence from long to short according to the transmission wavelength; or

[0155] According to the second networking model, the optical modules that actually participate in the networking application among optical modules n+1 to optical module 2n are placed at the head end and arranged in sequence from long to short according to the transmission wavelength, and the optical modules that actually participate in the networking application among optical modules 1 to optical module n are placed at the tail end and arranged in sequence from short to long according to the transmission wavelength.

[0156] Optionally, in networking, the optical uplink port of the first-level optical module at the head end that actually participates in the networking application and the optical uplink port of the first-level optical module at the tail end that actually participates in the networking application are interconnected through a single-core optical cable core. In addition to the first-level optical module, when the optical modules at the head end and the tail end that actually participate in the networking application are interconnected, the optical downlink port of the upper-level optical module and the optical uplink port of the lower-level optical module are interconnected through an optical jumper fiber.

[0157] Optionally, the device further comprises:

[0158] A parallel optical component design module, used to adopt a two-stage long-wave pass type thin film filter TFF filtering structure when designing a parallel optical component of a parallel optical module, wherein the structural model of the two-stage long-wave pass type TFF filtering structure is a first structural model or a second structural model;

[0159] Among them, in the first structural model, the first-stage TFF filter realizes the coupling of the transmission wavelength and the total reflection of the wavelength received from the optical uplink port, and the second-stage TFF filter realizes the separation of the receiving wavelength and the total reflection of the wavelength received from the optical downlink port;

[0160] In the second structural model, the first-stage TFF filter realizes the separation of the receiving wavelength and the total reflection of the receiving wavelength from the optical uplink port, and the second-stage TFF filter realizes the coupling of the sending wavelength and the total reflection of the receiving wavelength from the optical downlink port.

[0161] Optionally, if the structural model of the two-stage long-wave pass TFF filtering structure is the first structural model, when 1≤m≤n, the cut-off wavelength of the first-stage TFF filtering is designed between λm and λm+1, and the cut-off wavelength of the second-stage TFF filtering is designed between λ2n-m and λ2n-m+1, and, when n+1≤m≤2n, the cut-off wavelength of the first-stage TFF filtering is designed between λm and λm-1, and the cut-off wavelength of the second-stage TFF filtering is designed between λ2n-m+1 and λ2n-m+2.

[0162] Optionally, if the structural model of the two-stage long-wave pass TFF filtering structure is the second structural model, when 1≤m≤n, the cut-off wavelength of the first-stage TFF filtering is designed between λ2n-m and λ2n-m+1, and the cut-off wavelength of the second-stage TFF filtering is designed between λm and λm+1, and, when n+1≤m≤2n, the cut-off wavelength of the first-stage TFF filtering is designed between λ2n-m+1 and λ2n-m+2, and the cut-off wavelength of the second-stage TFF filtering is designed between λm and λm-1.

[0163] Optionally, for the last-stage optical module in the networking model, the corresponding parallel optical component cancels the second-stage TFF filter in the structural model of the two-stage long-wave pass TFF filter structure, and only retains the first-stage TFF filter.

[0164] Embodiment 3:

[0165] refer to Fig.13 This embodiment provides a wavelength and networking arrangement device for parallel optical modules, including a memory 21 and a processor 22, wherein the memory 21 stores a computer program, and the processor 22 is configured to run the computer program to execute the wavelength and networking arrangement method for parallel optical modules in Example 1.

[0166] The memory 21 is connected to the processor 22. The memory 21 may be a flash memory, a read-only memory or other memory. The processor 22 may be a central processing unit or a single-chip microcomputer.

[0167] Embodiment 4:

[0168] This embodiment provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the wavelength and networking arrangement method for parallel optical modules in the above-mentioned embodiment 1 is implemented.

[0169] The computer-readable storage medium includes volatile or non-volatile, removable or non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, computer program modules or other data). Computer-readable storage media include, but are not limited to, RAM (Random Access Memory), ROM (Read-Only Memory), EEPROM (Electrically Erasable Programmable read only memory), flash memory or other memory technology, CD-ROM (Compact Disc Read-Only Memory), digital versatile disk (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store the desired information and can be accessed by a computer.

[0170] In summary, the wavelength and networking arrangement method, device and medium for parallel optical modules provided in the embodiments of the present invention first set the parallel optical module networking model to have a total of 2n optical modules, with n modules at the head end and n modules at the tail end, requiring a total of 2n optical wavelengths, and numbering the sending wavelengths of the 2n optical modules in order from short to long as λ1 to λ2n, and the corresponding optical modules are numbered as optical module 1 to optical module 2n; then, for each optical module m in the 2n optical modules, the sending wavelength of the optical module m is set to λm, and the corresponding receiving wavelength is λ2n-m+1, where 1≤m≤2n; then, when networking, the optical module m is paired with the optical module 2n-m+1; finally, in the networking, according to the networking model, optical modules 1 to optical module n are arranged in sequence from short to long according to the sending wavelength, and optical modules n+1 to optical module 2n are arranged in sequence from long to short according to the sending wavelength. The present invention arranges the sending wavelength and receiving wavelength of each optical module in the networking model, as well as the networking order, so that each TFF filter in the parallel optical component can be designed as a long-wave pass filter with lower process complexity, cost and insertion loss. At the same time, it can effectively reduce the number of coating layers of the TFF filter and reduce the insertion loss of the parallel optical component caused by the TFF filter, thereby increasing the optical transmission distance of the parallel optical module networking system, and is also beneficial to increasing the number of parallel devices and extending the distance. In addition, by reducing the difficulty of the TFF filter coating process, the yield rate can be improved and the cost of the optical module can be reduced, which solves the problem that although the existing parallel optical module is more flexible in networking, the TFF filter in the parallel optical component is required to only support the passage of optical signals of a certain specific wavelength, which easily leads to high process difficulty, low yield rate, large insertion loss and high cost.

[0171] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A wavelength and networking arrangement method for parallel optical modules, characterized in that: The method comprises: It is assumed that the parallel optical module networking model has a total of 2n optical modules, n at the head end and n at the tail end, and a total of 2n optical wavelengths are required. The transmission wavelengths of the 2n optical modules are numbered from λ1 to λ2n in order from short to long, and the corresponding optical modules are numbered from optical module 1 to optical module 2n; For each optical module m among the 2n optical modules, the transmission wavelength of the optical module m is set to λm, and the corresponding receiving wavelength is set to λ2n-m+1, where 1≤m≤2n; When networking, pair optical module m with optical module 2n-m+1. In the networking, according to the networking model, optical modules 1 to n are arranged in order from short to long transmission wavelengths, and optical modules n+1 to 2n are arranged in order from long to short transmission wavelengths.

2. The method according to claim 1, characterized in that The method of arranging optical modules 1 to n in order from short to long according to the transmission wavelength according to the networking model, and arranging optical modules n+1 to 2n in order from long to short according to the transmission wavelength according to the networking model specifically includes: Determine the optical modules that actually participate in the networking application among optical modules 1 to optical modules n and optical modules n+1 to optical modules 2n; According to the first networking model, the optical modules from optical module 1 to optical module n that actually participate in the networking application are placed at the head end and arranged in order from short to long according to the transmission wavelength, and the optical modules from optical module n+1 to optical module 2n that actually participate in the networking application are placed at the tail end and arranged in order from long to short according to the transmission wavelength; or, According to the second networking model, the optical modules that actually participate in the networking application among optical modules n+1 to optical module 2n are placed at the head end and arranged in sequence from long to short according to the transmission wavelength, and the optical modules that actually participate in the networking application among optical modules 1 to optical module n are placed at the tail end and arranged in sequence from short to long according to the transmission wavelength.

3. The method according to claim 2, characterized in that In networking, the optical uplink port of the first-level optical module at the head end that actually participates in the networking application is interconnected with the optical uplink port of the first-level optical module at the tail end that actually participates in the networking application through a single-core optical cable core. In addition to the first-level optical module, when the optical modules at the head end and the tail end that actually participate in the networking application are interconnected, the optical downlink port of the upper-level optical module is interconnected with the optical uplink port of the lower-level optical module through an optical jumper fiber.

4. The method according to claim 1, characterized in that The method further comprises: When designing the parallel optical component of the parallel optical module, a two-stage long-wave pass type thin film filter TFF filtering structure is adopted, and the structural model of the two-stage long-wave pass type TFF filtering structure is the first structural model or the second structural model; Among them, in the first structural model, the first-stage TFF filter realizes the coupling of the transmission wavelength and the total reflection of the wavelength received from the optical uplink port, and the second-stage TFF filter realizes the separation of the receiving wavelength and the total reflection of the wavelength received from the optical downlink port; In the second structural model, the first-stage TFF filter realizes the separation of the receiving wavelength and the total reflection of the receiving wavelength from the optical uplink port, and the second-stage TFF filter realizes the coupling of the sending wavelength and the total reflection of the receiving wavelength from the optical downlink port.

5. The method according to claim 4, characterized in that If the structural model of the two-stage long-wave pass TFF filter structure is the first structural model, when 1≤m≤n, the cut-off wavelength of the first-stage TFF filter is designed between λm and λm+1, and the cut-off wavelength of the second-stage TFF filter is designed between λ2n-m and λ2n-m+1, and, when n+1≤m≤2n, the cut-off wavelength of the first-stage TFF filter is designed between λm and λm-1, and the cut-off wavelength of the second-stage TFF filter is designed between λ2n-m+1 and λ2n-m+2.

6. The method according to claim 4, characterized in that If the structural model of the two-stage long-wave pass TFF filter structure is the second structural model, when 1≤m≤n, the cut-off wavelength of the first-stage TFF filter is designed between λ2n-m and λ2n-m+1, and the cut-off wavelength of the second-stage TFF filter is designed between λm and λm+1, and, when n+1≤m≤2n, the cut-off wavelength of the first-stage TFF filter is designed between λ2n-m+1 and λ2n-m+2, and the cut-off wavelength of the second-stage TFF filter is designed between λm and λm-1.

7. The method according to claim 4, characterized in that For the last-stage optical module in the networking model, the corresponding parallel optical component cancels the second-stage TFF filter in the structural model of the two-stage long-wave pass TFF filter structure, and only retains the first-stage TFF filter.

8. A wavelength and networking arrangement device for parallel optical modules, characterized in that: The device comprises: The modules are numbered in sequence, and are used to set a parallel optical module networking model with a total of 2n optical modules, n at the head end and n at the tail end, and a total of 2n optical wavelengths are required. The transmission wavelengths of the 2n optical modules are numbered from λ1 to λ2n in order from short to long, and the corresponding optical modules are numbered from optical module 1 to optical module 2n; A wavelength setting module, connected to the sequential numbering module, for setting the transmission wavelength of each optical module m in the 2n optical modules to λm, and the corresponding receiving wavelength to λ2n-m+1, wherein 1≤m≤2n; A pairing module, connected to the wavelength setting module, for pairing the optical module m with the optical module 2n-m+1 when networking; The networking arrangement module is connected to the pairing module and is used to arrange optical modules 1 to n in sequence from short to long according to the transmission wavelength according to the networking model, and to arrange optical modules n+1 to 2n in sequence from long to short according to the transmission wavelength.

9. A wavelength and networking arrangement device for parallel optical modules, characterized in that: The method comprises a memory and a processor, wherein the memory stores a computer program, and the processor is configured to run the computer program to implement the wavelength and networking arrangement method for parallel optical modules according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by the processor, the wavelength and networking arrangement method for parallel optical modules according to any one of claims 1 to 7 is implemented.

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