Optical assembly, optical module and related equipment

Abstract

An optical assembly, an optical module and a related device, a light splitting unit in the optical assembly receives input signal light obtained by multiplexing signal light of N passive optical networks from a first direction, and demultiplexes the input signal light to obtain first signal light containing M wavelengths and second signal light containing N-M wavelengths, n is an integer greater than 1, M is an integer greater than or equal to 1, and M is less than or equal to N-1, various light beams with different wavelengths can be output at corresponding ports without an external device, an included angle between the first direction and a normal of the first light splitting unit is less than or equal to 45 degrees, and the first direction is greater than the first direction. Therefore, the light splitting unit of the optical assembly realizes light splitting based on a small angle, an extremely narrow light splitting path is established, the optical assembly can be directly applied to an optical module of an optical line terminal, and miniaturization of the optical line terminal is further realized.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of optical communication technology, and specifically to an optical component, an optical module, and related equipment. Background Art

[0002] In the early days of gigabit passive optical network (GPON), 100M broadband access services were provided. However, as users have higher requirements for bandwidth access speed, operators have upgraded their networks to 10G PON / XGPON, 10G symmetric passive optical network (XGSPON) and even 50G PON (50GPON).

[0003] At present, users are not in urgent need of bandwidth upgrades, and GPON will still need to be online for a long time. XGSPON with large bandwidth is used in commercial scenarios, and may be upgraded to 50G PON in the future. At this time, there will be a situation where GPON, XG(S)PON and 50G PON coexist in multiple generations of passive optical networks. In order to adapt to this situation, an external wavelength division multiplexer with wavelength division coexistence is currently used on the optical line terminal (OLT) to distribute the signal light of different wavelengths of multiple generations of networks.

[0004] However, the external wavelength division multiplexer will not only increase the insertion loss of the optical link, but also increase the complexity of operation and maintenance, especially increase the size of the OLT. Summary of the invention

[0005] The embodiment of the present application provides an optical component for miniaturizing an optical line terminal. The embodiment of the present application also provides a corresponding optical module, an optical line terminal and an optical network unit.

[0006] In a first aspect, the present application provides an optical component, which includes a splitter module and a receiving module, the splitter module includes a first splitter unit; the first splitter unit is used to receive input signal light from a first direction, the input signal light is a signal light obtained after multiplexing signal lights of N passive optical networks, and the angle between the first direction and the normal of the first splitter unit is less than or equal to 45 degrees; the first splitter unit is also used to demultiplex the input signal light to obtain a first signal light and a second signal light, and transmit the first signal light and the second signal light to the receiving module, the first signal light includes M wavelengths, the second signal light includes NM wavelengths, the M wavelengths correspond to M passive optical networks among the N passive optical networks, and the NM wavelengths correspond to NM passive optical networks among the N passive optical networks; wherein N is an integer greater than 1, M is an integer greater than or equal to 1, and M is less than or equal to N-1.

[0007] The optical component in the present application can be applied to an optical module in an optical line terminal.

[0008] The input signal light in the present application is the uplink signal light, that is, the signal light sent from the optical network unit on the client side to the optical line terminal on the device side.

[0009] In the present application, each of the N passive optical networks corresponds to a wavelength range. The first signal light includes M wavelengths, and the M wavelengths correspond to M wavelength ranges, that is, the M wavelengths belong to M wavelength ranges, respectively, and the M wavelength ranges correspond to M passive optical networks. The first signal light can be understood as the signal light obtained by multiplexing the signal lights of the M passive optical networks.

[0010] Similarly, the second signal light includes NM wavelengths, which correspond to NM wavelength ranges, that is, the NM wavelengths belong to NM wavelength ranges respectively, and the NM wavelength ranges correspond to NM passive optical networks. The second signal light can be understood as the signal light obtained by multiplexing the signal lights of NM passive optical networks.

[0011] In the first aspect, the angle between the first direction and the normal of the first splitting unit is less than or equal to 45 degrees. For the first direction, that is, the direction in which the input signal light is incident on the first splitting unit, the angle between the first direction and the normal of the first splitting unit needs to be considered to separate the first signal light and the second signal light and to meet the miniaturization of the entire optical component.

[0012] When the angle between the first direction and the normal of the first splitter unit is less than or equal to 45 degrees, the first splitter component can not only separate the first signal light and the second signal light by transmission and reflection, but also make the angle between the first signal light and the second signal light greater than or equal to 90 degrees, so that the receiving module for receiving the first signal light and the receiving module for receiving the second signal light can be arranged in the same plane as much as possible, so as to realize the miniaturization of the optical component. The splitter unit of the optical component realizes splitting based on a small angle, and establishes an extremely narrow splitting optical path. When the optical component is used in the optical module of the optical line terminal, not only is it miniaturized itself, but for the optical line terminal, it also has the function of outputting a plurality of different wavelength light beams at the corresponding ports without the need for external devices, thereby further realizing the miniaturization of the optical line terminal.

[0013] In a possible implementation manner of the first aspect, an angle between the first direction and a normal line of the first light splitting unit is less than or equal to 13.5 degrees.

[0014] In this possible implementation, when the angle between the first direction and the normal of the first light splitting unit is less than or equal to 13.5 degrees, the input signal light can be split, which is beneficial to the miniaturization of the optical component and improves the feasibility of the solution.

[0015] In a possible implementation of the first aspect, the optical component also includes a transmitting module, and the splitting module also includes a second splitting unit; the transmitting module is used to multiplex the signal lights of N passive optical networks to obtain output signal light, and transmit the output signal light to the second splitting unit, and the second splitting unit is used to transmit the output signal light.

[0016] In this possible implementation, the optical component is a single-fiber bidirectional optical component, in which the output signal light emitted by the transmitting module is a downlink signal light, that is, the signal light sent by the optical line terminal on the device side to the optical network unit on the client side, realizing the bidirectional wave combining and splitting function.

[0017] In a possible implementation manner of the first aspect, the second light splitting unit is further configured to receive input signal light from the second direction, and reflect the input signal light in the first direction to the first light splitting unit.

[0018] In this possible implementation, by multiplexing the second optical splitter unit, the second optical splitter unit separates the wavelengths of the transmitting and receiving ends, thereby achieving coupling of the transmitting module and the receiving module, which is beneficial to the miniaturization of the optical component.

[0019] In a possible implementation manner of the first aspect, an angle between the second direction and a normal line of the second light splitting unit is less than or equal to 45 degrees.

[0020] In this possible implementation, when the angle between the second direction and the normal of the second light splitting unit is less than or equal to 45 degrees, wavelength separation at the transmitting and receiving ends can be achieved, thereby improving the feasibility of the solution.

[0021] In a possible implementation manner of the first aspect, an angle between the second direction and a normal line of the second light splitting unit is less than or equal to 13.5 degrees.

[0022] In this possible implementation, when the angle between the second direction and the normal of the second light splitting unit is less than or equal to 13.5 degrees, not only can the wavelength separation of the transmitting and receiving ends be achieved, but it is also conducive to the miniaturization of the optical component.

[0023] In a possible implementation manner of the first aspect, the optical splitter module further includes a third optical splitter unit; the first optical splitter unit is used to transmit the first signal light to the third optical splitter unit; and the third optical splitter unit is used to reflect the first signal light to the receiving module.

[0024] In this possible implementation, by providing an additional third light splitting unit, the direction of the first signal light can be changed, thereby correspondingly changing the position of the receiving module, which is conducive to miniaturization of the optical component.

[0025] In a possible implementation manner of the first aspect, the optical splitting module further includes a fourth optical splitting unit; the first optical splitting unit is used to reflect the second signal light to the fourth optical splitting unit; and the fourth optical splitting unit is used to reflect the second signal light to the receiving module.

[0026] In this possible implementation, by providing an additional fourth light splitting unit, the direction of the second signal light can be changed, thereby correspondingly changing the position of the receiving module, which is conducive to miniaturization of the optical component.

[0027] In a possible implementation of the first aspect, the optical splitter module also includes a fifth optical splitter unit and a sixth optical splitter unit, M is greater than 1; the third optical splitter unit is specifically used to reflect the first signal light to the fifth optical splitter unit; the fifth optical splitter unit is used to demultiplex the first signal light to obtain a third signal light and a fourth signal light, and transmit the third signal light to the receiving module, and reflect the fourth signal light to the sixth optical splitter unit; the sixth optical splitter unit is used to reflect the fourth signal light to the receiving module.

[0028] In this possible implementation, by providing an additional fifth splitter unit and a sixth splitter unit, the first signal light can be further demultiplexed and sent to different receiving modules for reception, thereby improving the adaptability of the receiving module and the feasibility of the solution.

[0029] In a possible implementation of the first aspect, the optical splitter module also includes a seventh optical splitter unit and an eighth optical splitter unit, NM is greater than 1; the fourth optical splitter unit is specifically used to reflect the second signal light to the seventh optical splitter unit; the seventh optical splitter unit is used to demultiplex the second signal light to obtain a fifth signal light and a sixth signal light, and transmit the fifth signal light to the receiving module, and reflect the sixth signal light to the eighth optical splitter unit; the eighth optical splitter unit is used to reflect the sixth signal light to the receiving module.

[0030] In this possible implementation, by providing an additional seventh splitter unit and an eighth splitter unit, the second signal light can be further demultiplexed and sent to different receiving modules for reception, thereby improving the adaptability of the receiving modules and the feasibility of the solution.

[0031] In a possible implementation manner of the first aspect, the optical splitting module further includes a ninth optical splitting unit, the third optical splitting unit is specifically used to reflect the first signal light to the ninth optical splitting unit, and the ninth optical splitting unit is used to reflect the first signal light to the receiving module.

[0032] In this possible implementation, by providing an additional ninth light splitting unit, the direction of the first signal light can be further changed, thereby correspondingly changing the position of the receiving module, which is conducive to miniaturization of the optical component.

[0033] In a possible implementation manner of the first aspect, the optical splitting module further includes a fourth optical splitting unit, the fourth optical splitting unit is specifically used to reflect the second signal light to the first ten-minute optical splitting unit, and the first ten-minute optical splitting unit is used to reflect the second signal light to the receiving module.

[0034] In this possible implementation, by providing an additional tenth optical unit, the direction of the second signal light can be further changed, thereby correspondingly changing the position of the receiving module, which is conducive to miniaturization of the optical component.

[0035] In a possible implementation manner of the first aspect, the receiving module includes a receiving port, the number of the receiving ports is 1 to N, and the receiving port is used to receive signal light of at least one passive optical network.

[0036] In this possible implementation, the receiving port can simultaneously receive signal lights of multiple different passive optical networks, thereby improving the adaptability of the receiving port and increasing the adaptability of signal lights of different passive optical networks.

[0037] In a possible implementation manner of the first aspect, the receiving port includes a filtering unit, and the filtering unit is used to pass signal light of a passive optical network matching the receiving port.

[0038] In this possible implementation, since the isolation degree of the optical splitting unit to signal lights of different wavelength ranges is limited, a filtering unit is also provided at the receiving port to filter out signal lights of wavelengths that do not match the receiving port, thereby improving the receiving stability of the optical component.

[0039] In a possible implementation manner of the first aspect, the receiving port is any one of a coaxial package TO, a butterfly package, or a chip on board package COB.

[0040] In this possible implementation, the receiving port can adopt a variety of encapsulation forms, which improves the feasibility of the solution.

[0041] In a possible implementation of the first aspect, the transmitting module includes N optical transmitters and N-1 to N+1 transmitting optical splitting units, and the N-1 to N+1 transmitting optical splitting units are used to multiplex the signal lights emitted by the N optical transmitters to obtain output signal lights.

[0042] In this possible implementation, N optical transmitters of the transmitting module are combined and integrated, further realizing the miniaturization of the optical component.

[0043] In a possible implementation manner of the first aspect, the optical assembly further includes an isolation plate, the isolation plate is used to separate the transmitting module from the receiving module, and an optical window is provided on the isolation plate, the optical window is used to transmit the output signal light.

[0044] In this possible implementation, the transmitting module and the receiving module in the optical component can be coupled, which further realizes the miniaturization of the optical component without affecting the optical performance.

[0045] In a possible implementation manner of the first aspect, the first light splitting unit is any one of a filter, a light splitting prism, or a wave splitter.

[0046] In this possible implementation, there are multiple options for the light splitting unit, which improves the feasibility of the solution.

[0047] In a possible implementation of the first aspect, the N passive optical networks include any N of a gigabit passive optical network GPON, a 10 gigabit passive optical network 10G PON / XGPON, a 10 gigabit symmetric passive optical network XGSPON, a 50 gigabit passive optical network 50G PON, an Ethernet passive optical network EPON, a 10 gigabit Ethernet passive optical network 10G EPON, and a 50 gigabit Ethernet passive optical network 50G EPON.

[0048] In this possible implementation, the optical component supports multiple generations of passive optical networks, improving the feasibility of the solution.

[0049] A second aspect of the present application provides an optical module, which includes an optical component as described in the first aspect or any possible implementation of the first aspect.

[0050] A third aspect of the present application provides an optical line terminal, which includes an optical module according to the second aspect or any possible implementation of the second aspect.

[0051] A fourth aspect of the present application provides an optical network unit, which includes an optical module as described in the second aspect or any possible implementation of the second aspect.

[0052] In an embodiment of the present application, a splitter unit in an optical component receives an input signal light obtained after multiplexing signal lights of N passive optical networks from a first direction, and demultiplexes the input signal light to obtain a first signal light comprising M wavelengths and a second signal light comprising NM wavelengths, and transmits the first signal light and the second signal light to a receiving module, wherein N is an integer greater than 1, M is an integer greater than or equal to 1, and M is less than or equal to N-1, and the function of outputting a plurality of light beams of different wavelengths at corresponding ports without the need for external devices is realized, and an angle between the first direction and the normal of the first splitter unit is less than or equal to 45 degrees, so that the splitter unit of the optical component realizes splitting based on a small angle, establishes an extremely narrow splitting optical path, and can be directly applied to the optical module of the optical line terminal, further realizing the miniaturization of the optical line terminal. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 is a schematic diagram of the architecture of a passive optical network;

[0054] Figure 2 A schematic diagram of the structure of an optical line terminal provided in an embodiment of the present application;

[0055] Figure 3 A schematic diagram of an embodiment of an optical component provided in an embodiment of the present application;

[0056] Figure 4A and Figure 4B A schematic diagram of an embodiment of an optical component provided in an embodiment of the present application;

[0057] Figure 5A-5C A schematic diagram of an embodiment of a transmitting module provided in an embodiment of the present application;

[0058] Figure 6-Figure 11 A schematic diagram of an embodiment of an optical component provided in an embodiment of the present application;

[0059] Fig.12 A schematic diagram of an embodiment of a passive optical network provided in an embodiment of the present application. DETAILED DESCRIPTION

[0060] The following describes the embodiments of the present application in conjunction with the accompanying drawings. Obviously, the described embodiments are only embodiments of a part of the present application, rather than all embodiments. It is known to those skilled in the art that with the development of technology and the emergence of new scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0061] The terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0062] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0063] In addition, in order to better illustrate the present application, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0064] The following is an example of the application scenario involved in the embodiments of the present application.

[0065] Passive optical network (PON) is a point-to-multipoint passive optical network. It is a combination of network elements in an optical access network based on an optical distribution network (ODN), and the optical distribution network does not contain any electronic devices or electronic power supplies. Among them, ODN is composed entirely of passive devices such as optical splitters. A PON includes an optical line terminal (OLT) installed in a central control station and multiple optical network units (ONUs) installed in user locations, and implements a set of specific physical medium-related layers, transmission convergence layers, and management protocols.

[0066] like Figure 1As shown, the optical line terminal OLT is connected to two optical network units ONU through the optical distribution network ODN. ODN refers to the entire passive optical network from the OLT port to each ONU port. It should be understood that in other networking scenarios, an OLT can also connect a larger number of ONUs. Among them, the OLT needs to be connected to the ODN through an optical module. On the one hand, the optical module needs to convert the electrical signal sent by the OLT into signal light and transmit it to the ONU through the ODN; on the other hand, the optical module also needs to convert the signal light transmitted from the ONU through the ODN into an electrical signal, and then send the electrical signal to the OLT.

[0067] In the early days of gigabit passive optical network (GPON), 100M broadband access services were provided. However, as users have higher requirements for bandwidth access speed, operators have upgraded their networks to 10G PON / XGPON, 10G symmetric passive optical network (XGSPON) and even 50G PON (50GPON).

[0068] At present, users are not in urgent need of bandwidth upgrades, and GPON will still need to be online for a long time. The large-bandwidth XGSPON is used in commercial scenarios and may be upgraded to 50G PON in the future. At this time, there will be a situation where multiple generations of passive optical networks, such as GPON, XG(S)PON and 50G PON, coexist. Since the upstream and downstream wavelengths of GPON, 10G PON and 50G PON are different, in order to adapt to this situation, an external wavelength division multiplexer is required, such as an external wavelength division coexistence wavelength division multiplexer on the OLT, so as to combine or split the signal light in the upstream and downstream directions, achieve compatibility of different wavelengths of multiple generations of PON, and distribute the signal light of different wavelengths of multiple generations of PON.

[0069] However, an external wavelength division multiplexer will not only increase the insertion loss of the optical link, but also increase the complexity of operation and maintenance, especially increase the size of the OLT. Based on this, an embodiment of the present application provides an optical component for miniaturizing an optical line terminal. An embodiment of the present application also provides a corresponding optical module and an optical line terminal.

[0070] like Figure 2As shown, the optical component provided in the embodiment of the present application can be directly arranged inside the optical module, and there is no need for an external wavelength division multiplexer to increase the volume of the OLT. While the optical module realizes photoelectric conversion, it can also realize the wavelength division function of multiple generations of PON, and the optical component establishes an extremely narrow splitting optical path, further ensuring the miniaturization of the optical line terminal.

[0071] It should be understood that the dotted lines in the drawings of the embodiments of the present application represent signal light, and the dot-dash lines represent normal lines.

[0072] The optical component provided in the embodiment of the present application is described below in conjunction with the above application scenarios.

[0073] like Figure 3 As shown, an embodiment of the present application provides an optical component, which includes a splitter module 100 and a receiving module.

[0074] Specifically, the optical splitter module 100 includes a first optical splitter unit 101, which is used to receive input signal light from a first direction, and demultiplex the input signal light to obtain a first signal light and a second signal light, and finally transmit the first signal light and the second signal light to a receiving module. For example, the first optical splitter unit 101 transmits the first signal light to one receiving module and reflects the second signal light to another receiving module.

[0075] The input signal light is a signal light obtained by multiplexing signal lights of N passive optical networks, and the N passive optical networks include any N of GPON, 10GPON / XGPON, XGSPON, 50G PON, Ethernet passive optical network (Ethernet passive optical network, EPON), 10GEPON and 50G EPON.

[0076] Exemplarily, N is 3, and the three passive optical networks are GPON, 10G PON and 50G PON. Each passive optical network corresponds to a wavelength range (it should be understood that the wavelength ranges of different passive optical networks may overlap), and each wavelength range can be represented by the central wavelength of its wavelength range. Since the input signal light is the uplink signal light (i.e., the signal light sent from the ONU on the client side to the OLT on the device side), the uplink central wavelength of GPON is 1310nm, the uplink central wavelength of 10G PON is 1270nm, and the uplink central wavelength of 50GPON is 1286nm. The specific wavelength range is extended around the central wavelength. For example, the wavelength range of GPON is 1290nm to 1330nm, the wavelength range of 10G PON is 1260nm to 1280nm, and the wavelength range of 50G PON is 1284nm to 1288nm. The embodiments of the present application will be described later with GPON, 10G PON and 50G PON is used as an example, and different wavelength ranges or center wavelengths are used to represent different passive optical networks.

[0077] It should be understood that with the upgrade of the passive optical network, the optical components provided in the embodiments of the present application are also applicable to the wavelength range of the next generation PON or EPON passive optical networks that are subsequently upgraded, and the embodiments of the present application are not limited to this.

[0078] After the first optical splitter 101 demultiplexes the input signal light, a first signal light and a second signal light are obtained, wherein the first signal light includes M wavelengths, and the second signal light includes NM wavelengths, the M wavelengths correspond to M passive optical networks among N passive optical networks, and the NM wavelengths correspond to NM passive optical networks among N passive optical networks. Wherein N is an integer greater than 1, M is an integer greater than or equal to 1, and M is less than or equal to N-1.

[0079] Exemplarily, the first signal light includes two wavelengths, 1300nm and 1275nm, and 1300nm belongs to the wavelength range of GPON, and 1275nm belongs to the wavelength range of 10G PON. The two wavelengths of the first signal light correspond to two passive optical networks respectively, and the first signal light includes the wavelengths of two passive optical networks, GPON and 10G PON.

[0080] Furthermore, the receiving module includes a receiving port 200, the number of the receiving ports 200 is 1 to N, and the receiving port 200 is used to receive signal light of at least one passive optical network, that is, the receiving port 200 can receive signal light of 1 to N wavelength ranges. The receiving port 200 can specifically be a coaxial package (transistor outline, TO), a butterfly package (BOX package) or a chip on board package (chips on board, COB). Taking the receiving port 200 as an example of TO, the TO can be a single-receiving TO for receiving signal light of 1 wavelength range, or a dual-receiving TO for receiving signal light of 2 wavelength ranges, or a triple-receiving TO for receiving signal light of 3 wavelength ranges, etc.

[0081] Exemplarily, when N is 2, M is 1, the input signal light is the signal light obtained after multiplexing of GPON and 10G PON, the wavelength of the first signal light is 1310nm (GPON), and the wavelength of the second signal light is 1270nm (10G PON). The receiving module includes two receiving ports, namely a first receiving port and a second receiving port. The first receiving port is used to receive the first signal light of GPON, and the second receiving port is used to receive the second signal light of 10GPON.

[0082] Or the wavelength of the first signal light is 1270 nm (10G PON), the wavelength of the second signal light is 1310 nm (GPON), the first receiving port is used to receive the first signal light of 10G PON, and the second receiving port is used to receive the second signal light of GPON.

[0083] When N is 3 and M is 1, the input signal light is the signal light obtained by multiplexing GPON, 10G PON and 50G PON, the wavelength of the first signal light is 1310nm (GPON), and the second signal light is a signal light containing two wavelengths, and the wavelengths are 1270nm (10G PON) and 1286nm (50G PON), respectively. The receiving module includes two receiving ports, namely a first receiving port and a second receiving port, the first receiving port is used to receive the first signal light of GPON, the second receiving port is used to receive the second signal light of 10GPON and 50G PON, and the second receiving port is a dual receiving TO.

[0084] When N is 3 and M is 2, the input signal light is the signal light obtained after multiplexing of GPON, 10G PON and 50G PON. The first signal light includes signal lights of two wavelengths, which are 1310nm (GPON) and 1270nm (10G PON), and the wavelength of the second signal light is 1286nm (50G PON). The receiving module includes two receiving ports, namely a first receiving port and a second receiving port. The first receiving port is used to receive the first signal light of GPON and 10G PON, and the second receiving port is used to receive the second signal light of 50G PON. The first receiving port is a dual receiving TO.

[0085] Optionally, the receiving port 200 includes a filtering unit, which is used to pass the signal light of the passive optical network matched with the receiving port 200. Because the input signal light only passes through one first optical splitter unit 101, and the first optical splitter unit 101 has limited isolation (about 15dB) for the signal light with a wavelength of 1286nm, a small amount of signal light with a wavelength of 1286nm is incident on the dual receiving TO (the receiving port 200 of 10G PON and GPON). Therefore, two 0-degree filters are placed in each of the dual receiving TOs, which are low-pass and high-resistance (such as on the receiving 10G PON side: pass wavelengths less than 1280nm, and block wavelengths higher than 1284nm) and high-pass and low-resistance (such as on the receiving GPON side: pass wavelengths greater than 1290nm, and block wavelengths less than 1288nm).

[0086] In the embodiment of the present application, the angle between the first direction and the normal of the first splitting unit 101 is less than or equal to 45 degrees. For the first direction, that is, the direction in which the input signal light is incident on the first splitting unit 101, the angle between the first direction and the normal of the first splitting unit 101 needs to be considered to separate the first signal light and the second signal light and to meet the miniaturization of the entire optical component. When the angle between the first direction and the normal of the first optical splitter unit 101 is less than or equal to 45 degrees, the first optical splitter component can not only separate the first signal light and the second signal light by transmission and reflection, but also make the angle between the first signal light and the second signal light greater than or equal to 90 degrees, so that the receiving module for receiving the first signal light and the receiving module for receiving the second signal light can be arranged in the same plane as much as possible, so as to realize the miniaturization of the optical component. The optical splitter unit of the optical component realizes optical splitting based on a small angle, and establishes an extremely narrow optical splitting path. When the optical component is used in the optical module of the optical line terminal, it is not only miniaturized itself, but also for the optical line terminal, it can output a variety of different wavelength light beams at the corresponding ports without external devices, thereby further realizing the miniaturization of the optical line terminal.

[0087] Optionally, the angle between the first direction and the normal of the first splitting unit 101 is less than or equal to 13.5 degrees. At this time, the first splitting unit 101 can transmit the first signal light of 50G PON with a wavelength of 1286nm, and reflect the second signal light of 10G PON with a wavelength of 1270nm and GPON with a wavelength of 1310nm, wherein the angle between the first direction and the normal of the first splitting unit 101 can be specifically 13.5 degrees, 13 degrees or 8 degrees, and the angle is adjusted and controlled by active coupling.

[0088] In the embodiment of the present application, the optical splitting module 100 may further include more optical splitting units, which are described in detail below:

[0089] 1. Second Spectral Unit

[0090] like Figure 4A As shown, the optical component further includes a transmitting module 300 , and the light splitting module 100 further includes a second light splitting unit 102 .

[0091] Among them, the transmitting module 300 is used to multiplex the signal lights of N types of passive optical networks to obtain output signal light, and transmit the output signal light to the second splitting unit 102. The second splitting unit 102 is used to transmit the output signal light. The second splitting unit 102 is also used to receive input signal light from the second direction and reflect the input signal light in the first direction to the first splitting unit 101.

[0092] The optical component is a single-fiber bidirectional optical component. The output signal light emitted by the transmitting module 300 is a downlink signal light (i.e., the signal light sent by the OLT on the device side to the ONU on the client side). The center wavelength of the corresponding GPON is 1490nm, the center wavelength of the 10G PON is 1577nm, and the center wavelength of the 50GPON is 1342nm. At this time, the second splitting unit 102 is used to separate the wavelengths of the transmitting and receiving ends.

[0093] The shortest interval difference between the upstream signal light and the downstream signal light is 10nm (i.e., the difference between the wavelength range endpoint 1330nm of the upstream signal light of GPON and the wavelength range endpoint 1340nm of the downstream signal light of 50G PON). In order to separate the upstream signal light from the downstream signal light, the angle between the second direction and the normal of the second optical splitter unit 102 is less than or equal to 45 degrees. At the same time, in order to ensure the miniaturization of the optical component, the angle between the second direction and the normal of the second optical splitter unit 102 can be further limited to be less than or equal to 13.5 degrees. The angle between the second direction and the normal of the second optical splitter unit 102 can also be specifically 13.5 degrees, 13 degrees or 8 degrees, and the angle is adjusted and controlled by active coupling.

[0094] The transmitting module 300 includes N optical transmitters 301 and N-1 to N+1 transmitting light splitting units 302, wherein the N-1 to N+1 transmitting light splitting units 302 are used to multiplex the signal lights emitted by the N optical transmitters 301 to obtain output signal lights, wherein the optical transmitter 301 can specifically be a laser.

[0095] Optionally, a collimating lens 303 may be disposed in front of each of the N optical transmitters 301 , and a collimating lens 303 may also be disposed in front of an output port for outputting signal light.

[0096] Optional, such as Figure 4B As shown, the transmitting module 300 and the receiving module are integrally formed or coupled. In this case, the optical component also includes an isolation plate 305, which is used to separate the transmitting module 300 from the receiving module. An optical window 306 is provided on the isolation plate 305, and the optical window 306 is used to transmit the output signal light while ensuring the airtightness of the transmitting module 300.

[0097] Optionally, an isolator 304 is also provided in the receiving module. After the output signal light is output from the optical window, it passes through the isolator 304 to prevent the output signal light from being refracted back to the optical transmitter 301. Then the output signal light passes through the second splitting unit 102 and the collimating lens 303 and is output.

[0098] Optionally, the transmitting module 300 may have various forms, for example, Figure 5A-5C As shown, N is 3, and the signal light emitted by the two optical transmitters 301 is first combined into one, and then combined with the signal light emitted by another optical transmitter 301 and outputted together.

[0099] The number of the emission splitting units 302 may be N-1 to N+1. Figure 5A As shown, the number of emission spectrometer units 302 is N-1. Figure 5B As shown, there are N emission splitting units 302, such as Figure 5C As shown, there are N+1 emission light splitting units 302. It should be understood that the number of emission light splitting units 302 can also be adjusted according to actual needs, and the embodiment of the present application does not limit the number of emission light splitting units.

[0100] 2. The third spectroscopic unit

[0101] like Figure 6 As shown, the light splitting module 100 further includes a third light splitting unit 103 .

[0102] The first light splitting unit 101 is used to transmit the first signal light to the third light splitting unit 103 , and the third light splitting unit 103 is used to reflect the first signal light to the receiving module.

[0103] In this case, by providing an additional third light splitting unit 103, the direction of the first signal light can be changed, thereby correspondingly changing the position of the receiving module, which is conducive to miniaturization of the optical component.

[0104] 3. The fourth spectroscopic unit

[0105] Based on the second case, Figure 7 As shown, the light splitting module 100 further includes a fourth light splitting unit 104 .

[0106] The first optical splitter unit 101 is used to reflect the second signal light to the fourth optical splitter unit 104, and the fourth optical splitter unit 104 is used to reflect the second signal light to the receiving module.

[0107] In this case, by providing an additional fourth light splitting unit 104, the direction of the second signal light can be changed, thereby correspondingly changing the position of the receiving module, which is conducive to miniaturization of the optical component.

[0108] It should be understood that the fourth light splitting unit 104 can be provided separately, and is not limited to being superimposed on the second light splitting unit 102 or the third light splitting unit 103 .

[0109] 4. The fifth and sixth light splitting units

[0110] Based on the third case, Figure 8 As shown, the light splitting module 100 further includes a fifth light splitting unit 105 and a sixth light splitting unit 106 , and M is greater than 1.

[0111] Among them, the third splitter unit 103 is specifically used to reflect the first signal light to the fifth splitter unit 105, the fifth splitter unit 105 is used to demultiplex the first signal light to obtain the third signal light and the fourth signal light, and transmit the third signal light to the receiving module, and reflect the fourth signal light to the sixth splitter unit 106, and the sixth splitter unit 106 is used to reflect the fourth signal light to the receiving module.

[0112] In this case, the first signal light is a signal light obtained by multiplexing signal lights of at least two wavelengths. By providing an additional fifth splitter unit 105 and a sixth splitter unit 106, the first signal light can be further demultiplexed and sent to different receiving modules for reception.

[0113] Exemplarily, when N is 4 and M is 3, the third signal light or the fourth signal light is a signal light obtained by multiplexing signal lights of two wavelengths. At this time, the receiving module corresponding to receiving the multiplexed signal light can be a dual-receiving TO. Therefore, the optical component provided in the embodiment of the present application can support 4 or more signal lights multiplexed with different wavelengths or wavelength ranges.

[0114] When the third signal light is a signal light obtained by multiplexing signal lights of two wavelengths, a filtering unit 201 is provided on the corresponding receiving module.

[0115] It should be understood that the fifth light splitting unit 105 and the sixth light splitting unit 106 are only required to be superimposed on the basis of the third light splitting unit 103 , and are not limited to being superimposed on the basis of the fourth light splitting unit 104 .

[0116] 5. The seventh and eighth spectroscopic units

[0117] Based on the fourth case, Fig. 9 As shown, the optical splitting module 100 further includes a seventh optical splitting unit 107 and an eighth optical splitting unit 108, and NM is greater than 1.

[0118] Among them, the fourth splitter unit 104 is specifically used to reflect the second signal light to the seventh splitter unit 107, the seventh splitter unit 107 is used to demultiplex the second signal light to obtain the fifth signal light and the sixth signal light, and transmit the fifth signal light to the receiving module, and reflect the sixth signal light to the eighth splitter unit 108, and the eighth splitter unit 108 is used to reflect the sixth signal light to the receiving module.

[0119] In this case, the second signal light is a signal light obtained by multiplexing signal lights of at least two wavelengths. By providing an additional seventh splitter unit 107 and an eighth splitter unit 108, the second signal light can be further demultiplexed and sent to different receiving modules for reception.

[0120] It should be understood that the seventh light splitting unit 107 and the eighth light splitting unit 108 are only required to be provided on the basis of the fourth light splitting unit 104, and are not limited to being provided on the basis of the third light splitting unit 103 or other light splitting units.

[0121] 6. The ninth spectroscopic unit

[0122] Based on the third case, Fig.10 As shown, the light splitting module 100 further includes a ninth light splitting unit 109 .

[0123] The third optical splitter unit 103 is specifically used to reflect the first signal light to the ninth optical splitter unit 109, and the ninth optical splitter unit 109 is used to reflect the first signal light to the receiving module.

[0124] In this case, by providing an additional ninth light splitting unit 109, the direction of the first signal light can be further changed, thereby correspondingly changing the position of the receiving module, which is conducive to miniaturization of the optical component.

[0125] Exemplarily, on the basis of additionally providing the ninth light splitting unit 109 , the angle of the fourth light splitting unit 104 is correspondingly adjusted, so that the two receiving modules can be provided on the same side, thereby further realizing the miniaturization of the optical component.

[0126] It should be understood that the ninth light splitting unit 109 is only required to be provided on the basis of the third light splitting unit 103 , and is not limited to being provided on the basis of the fourth light splitting unit 104 .

[0127] VII. The Tenth Light Unit

[0128] Based on the sixth case, Fig.11 As shown, the light splitting module 100 further includes a tenth light splitting unit 110 .

[0129] The fourth light splitting unit 104 is specifically used to reflect the second signal light to the tenth light splitting unit 110, and the tenth light splitting unit 110 is used to reflect the second signal light to the receiving module.

[0130] In this case, by providing an additional tenth light unit 110, the direction of the second signal light can be further changed, thereby correspondingly changing the position of the receiving module, which is conducive to miniaturization of the optical component.

[0131] Exemplarily, on the basis of additionally providing the tenth optical splitting unit 110, the angle of the third optical splitting unit 103 is correspondingly adjusted, so that the two receiving modules can be arranged on the same side, thereby further realizing the miniaturization of the optical component.

[0132] It should be understood that the tenth light splitting unit 110 is only required to be provided on the basis of the fourth light splitting unit 104, and is not limited to being provided on the basis of the tenth light splitting unit 103 or other light splitting units.

[0133] Optionally, the first to tenth light splitting units 101 to 110 and the emission light splitting unit 302 in the embodiment of the present application can be any one of a filter, a light splitting prism or a wave splitter. Each light splitting unit in the embodiment of the present application is illustrated by a filter.

[0134] It should be understood that in the embodiments of the present application, the optical paths of the input signal light, the output signal light, the first signal light and other signal lights are all parallel optical paths.

[0135] Summarizing the above embodiments, it can be seen that the beneficial effects brought by the optical assembly provided in the embodiments of the present application include but are not limited to the following three points:

[0136] (1) By setting the angle between the light path and the normal line of the light splitting unit, the light splitting unit of the optical component can split light based on a small angle, thereby establishing an extremely narrow light splitting path and realizing miniaturization of the optical component;

[0137] (2) The function of the built-in wavelength division multiplexer in the optical component can be directly set in the optical module of the optical line terminal. The optical line terminal can output multiple different wavelength light beams at the corresponding ports without external devices, realizing the miniaturization of the optical line terminal and avoiding the operation and maintenance management problems caused by the addition of new devices;

[0138] (3) By setting up multiple splitter units to change the optical path and correspondingly adjusting the position of the receiving module, the optical component can be further miniaturized.

[0139] The optical components provided in the embodiments of the present application are introduced above. The optical module, optical line terminal and optical network unit provided in the embodiments of the present application are introduced below with reference to the accompanying drawings.

[0140] like Fig.12 As shown, the embodiment of the present application provides a passive optical network, which can be Figure 1 The passive optical network shown in FIG.

[0141] The optical line terminal 400 includes an optical module 401, and the optical module 401 includes an optical component 402 provided in an embodiment of the present application. The optical network unit 500 also includes an optical module 501, and the optical module 501 includes an optical component 502 provided in an embodiment of the present application.

[0142] It should be noted that the optical component 402 in the optical line terminal 400 can directly correspond to Figure 3-Figure 11 Any optical component in the optical network unit 500, and the optical component 502 in the optical network unit 500 has the opposite propagation direction of the signal light. Figure 3-Figure 11 Any optical component in the optical network unit 500 can be directly applied to the optical network unit 500 only after adjusting the input signal light, the output signal light and the splitter unit in the splitter module to adapt to the signal light in the corresponding wavelength range.

[0143] Taking the optical line terminal 400 as an example, the optical module 401 provided in the embodiment of the present application may also include devices such as a photoelectric conversion unit. The photoelectric conversion unit is connected to the optical component 402 provided in the embodiment of the present application, but the embodiment of the present application does not limit the specific internal structure and devices of the optical module 401. The optical component 402 in the optical module 401 can be connected to other devices or adopt other connection methods.

[0144] In the optical line terminal 400 provided in the embodiment of the present application, the optical line terminal 400 may also include devices such as a medium access control (MAC) chip and a line card, and the optical module 401 may be connected to the MAC chip through the line card, but the embodiment of the present application does not limit the specific internal structure and devices of the optical line terminal 400. The optical module 401 in the optical line terminal 400 may be connected to other devices or adopt other connection methods.

[0145] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the embodiments of the present application.

[0146] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0147] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0148] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0149] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0150] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, read-only memory), random access memory (RAM, random access memory), disk or optical disk and other media that can store program code.

Claims

1. An optical component, characterized in that: It includes a light splitting module and a receiving module, wherein the light splitting module includes a first light splitting unit; The first optical splitter unit is used to receive input signal light from a first direction, the input signal light is signal light obtained by multiplexing signal lights of N passive optical networks, and the angle between the first direction and the normal of the first optical splitter unit is less than or equal to 45 degrees; The first optical splitter unit is further used to demultiplex the input signal light to obtain a first signal light and a second signal light, and transmit the first signal light and the second signal light to the receiving module, the first signal light includes M wavelengths, the second signal light includes NM wavelengths, the M wavelengths correspond to M passive optical networks among the N passive optical networks, and the NM wavelengths correspond to NM passive optical networks among the N passive optical networks; Wherein, N is an integer greater than 1, M is an integer greater than or equal to 1, and M is less than or equal to N-1.

2. The optical assembly according to claim 1, characterized in that An angle between the first direction and a normal line of the first light splitting unit is less than or equal to 13.5 degrees.

3. The optical component according to claim 1 or 2, characterized in that: The optical component further includes a transmitting module, and the light splitting module further includes a second light splitting unit; The transmitting module is used for multiplexing signal lights of N passive optical networks to obtain output signal lights, and transmits the output signal lights to the second optical splitting unit, and the second optical splitting unit is used for transmitting the output signal lights.

4. The optical assembly according to claim 3, characterized in that: The second light splitting unit is further used for receiving input signal light from a second direction, and reflecting the input signal light in the first direction to the first light splitting unit.

5. The optical assembly according to claim 4, characterized in that: An angle between the second direction and a normal line of the second light splitting unit is less than or equal to 45 degrees.

6. The optical assembly according to claim 5, characterized in that: An angle between the second direction and a normal line of the second light splitting unit is less than or equal to 13.5 degrees.

7. The optical assembly according to any one of claims 1 to 6, characterized in that: The light splitting module also includes a third light splitting unit; The first light splitting unit is used to transmit the first signal light to the third light splitting unit; The third light splitting unit is used to reflect the first signal light to the receiving module.

8. The optical assembly according to any one of claims 1 to 7, characterized in that: The light splitting module also includes a fourth light splitting unit; The first light splitting unit is used to reflect the second signal light to the fourth light splitting unit; The fourth light splitting unit is used to reflect the second signal light to the receiving module.

9. The optical assembly according to claim 7 or 8, characterized in that: The light splitting module further includes a fifth light splitting unit and a sixth light splitting unit, and M is greater than 1; The third light splitting unit is specifically used to reflect the first signal light to the fifth light splitting unit; The fifth optical splitter unit is used to demultiplex the first signal light to obtain a third signal light and a fourth signal light, transmit the third signal light to the receiving module, and reflect the fourth signal light to the sixth optical splitter unit; The sixth light splitting unit is used to reflect the fourth signal light to the receiving module.

10. The optical assembly according to claim 8 or 9, characterized in that: The optical splitting module further includes a seventh optical splitting unit and an eighth optical splitting unit, and NM is greater than 1; The fourth light splitting unit is specifically used to reflect the second signal light to the seventh light splitting unit; The seventh optical splitter unit is used to demultiplex the second signal light to obtain a fifth signal light and a sixth signal light, transmit the fifth signal light to the receiving module, and reflect the sixth signal light to the eighth optical splitter unit; The eighth light splitting unit is used to reflect the sixth signal light to the receiving module.

11. The optical assembly according to claim 7 or 8, characterized in that: The optical splitting module further includes a ninth optical splitting unit. The third optical splitting unit is specifically used to reflect the first signal light to the ninth optical splitting unit. The ninth optical splitting unit is used to reflect the first signal light to the receiving module.

12. The optical assembly according to claim 8 or 9, characterized in that: The optical splitting module further includes a tenth optical splitting unit, and the fourth optical splitting unit is specifically used to reflect the second signal light to the tenth optical splitting unit, and the tenth optical splitting unit is used to reflect the second signal light to the receiving module.

13. The optical assembly according to any one of claims 1 to 12, characterized in that: The receiving module comprises receiving ports, the number of which is 1 to N, and the receiving ports are used to receive signal light of at least one passive optical network.

14. The optical assembly according to claim 13, characterized in that: The receiving port comprises a filtering unit, and the filtering unit is used for passing the signal light of the passive optical network matched with the receiving port.

15. The optical assembly according to claim 13 or 14, characterized in that: The receiving port is any one of a coaxial package TO, a butterfly package or a chip-on-board package COB.

16. The optical assembly according to any one of claims 3 to 15, characterized in that: The transmitting module includes N optical transmitters and N-1 to N+1 transmitting light splitting units, and the N-1 to N+1 transmitting light splitting units are used to multiplex the signal lights emitted by the N optical transmitters to obtain the output signal lights.

17. The optical assembly according to any one of claims 3 to 16, characterized in that: The optical assembly further includes an isolation plate, which is used to separate the transmitting module from the receiving module. An optical window is disposed on the isolation plate, which is used to transmit the output signal light.

18. The optical assembly according to any one of claims 1 to 17, characterized in that: The first light splitting unit is any one of a filter, a light splitting prism or a wave splitter.

19. The optical assembly according to any one of claims 1 to 18, characterized in that: The N types of passive optical networks include any N types of gigabit passive optical network GPON, 10 gigabit passive optical network 10G PON / XGPON, 10 gigabit symmetric passive optical network XGSPON, 50 gigabit passive optical network 50G PON, Ethernet passive optical network EPON, 10 gigabit Ethernet passive optical network 10G EPON and 50 gigabit Ethernet passive optical network 50G EPON.

20. An optical module, characterized in that: Comprising the optical component as claimed in any one of claims 1-19.

21. An optical line terminal, characterized in that: Comprising the optical module as claimed in claim 20.

22. An optical network unit, characterized in that: Comprising the optical module as claimed in claim 20.

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