CN220775833U - Optical transceiver assembly, optical module and optical communication equipment - Google Patents

Abstract

The application provides an optical transceiver module, an optical module and optical communication equipment, which can realize multi-band transceiver and apply various PON systems. Comprising the following steps: an optical transceiver module comprising: the optical fiber receiving device comprises a WDM (wavelength division multiplexing) device, a reflecting device, a first optical fiber inserting core, a second optical fiber inserting core, a first receiving component, a transmitting and receiving component and a shell; the WDM, the reflecting device, the first optical fiber inserting core and the second optical fiber inserting core are arranged in the shell, the first optical fiber inserting core and the second optical fiber inserting core are arranged on two opposite surfaces of the shell, and light rays in the two optical fiber inserting cores are parallel; the first face of the WDM is opposite to the output end of the first optical fiber ferrule and the reflecting component, a first preset angle is formed between vertical lines of the WDM, the second face of the WDM is opposite to the first receiving component, and the vertical lines are lines perpendicular to the optical paths in the first optical fiber ferrule.

Description

Optical transceiver assembly, optical module and optical communication equipment

Technical Field

The present application relates to the field of optical communications, and in particular, to an optical transceiver module, an optical module, and an optical communication device.

Background

The passive optical network (passive optical network, PON) system belongs to a system with coexistence of upstream and downstream, and uses a single-fiber bidirectional optical component to transmit optical signals, so as to generate a scenario of coexistence of multiple different PON systems along with the evolution of the network, so wavelength division multiplexing (wavelength division multiplexing, WDM) will become a common optical device. In short, different wavelengths represent different signal transmission channels, which are stacked together and can be transmitted by common optical fibers.

With the explosion of information volume, especially in the coming of the big data age, the demand for network throughput is continuously increasing. It will be possible to deploy PON of different speeds or different frequency bands, such as Gigabit passive optical network (Gigabit passive optical network, GPON), 10G Gigabit passive optical network (10G Gigabit-capable passive optical network, XGPON), 50G Gigabit passive optical network (50G Gigabit-capable passive optical network,50 GPON) and the like. Upstream and downstream wavelength multiplexing and multiplexing of GPON, 10GPON Combo and 50G PON are typically performed by WDM. However, in the conventional multiplexer, various optical devices are usually disposed, and the optical devices need to be fixed in the housing by glue or welding, which often introduces angular deviation, resulting in large insertion loss of the optical signals or high manufacturing cost.

Disclosure of Invention

The application provides an optical transceiver module, an optical module and optical communication equipment, which can realize multi-band transceiver and apply various PON systems.

In view of this, the present application provides an optical transceiver module, including: an optical transceiver module comprising: the optical fiber receiving device comprises a WDM (wavelength division multiplexing) device, a reflecting device, a first optical fiber inserting core, a second optical fiber inserting core, a first receiving component, a transmitting and receiving component and a shell;

the WDM, the reflecting device, the first optical fiber inserting core and the second optical fiber inserting core are arranged in the shell, the first optical fiber inserting core and the second optical fiber inserting core are arranged on two opposite surfaces of the shell, and light rays in the two optical fiber inserting cores are parallel; the first surface of the WDM is opposite to the output end of the first optical fiber ferrule and the reflecting component, a first preset angle is formed between vertical lines of the WDM, the second surface of the WDM is opposite to the first receiving component, and the vertical lines are lines perpendicular to the optical path in the first optical fiber ferrule;

when receiving optical signals, the WDM is used for enabling optical signals of a first wave band and optical signals of a second wave band in the optical signals incident from the first optical fiber inserting core to be incident to the first receiving assembly for receiving, and the optical signals of the second wave band are reflected to the second optical fiber inserting core through the reflecting device after being diffracted to the reflecting assembly and transmitted to the receiving and transmitting assembly for receiving through the second optical fiber inserting core;

when transmitting signals, the transceiver component is further used for transmitting optical signals through the second optical fiber insert, and the reflecting device is further used for reflecting the optical signals incident from the second optical fiber insert to the WDM, and transmitting the optical signals after being reflected to the first optical fiber insert through the WDM.

Therefore, in the embodiment of the application, the receiving component is separately provided to receive the optical signals of the first band, and the receiving and transmitting of the optical signals of the remaining bands can be realized through the additionally provided receiving and transmitting component. When the method is applied to a 50GPON system, uplink received signals of the 50GPON can be received through a separately arranged receiving component, so that the upgrading of a receiving part of the PON system is realized. And the 50G PON uplink receiving and wave splitting can be completed through one-time transmission, the coupling insertion loss is small, the requirement on the WDM fixed manufacturing angle deviation is low, and the process is simple and easy to realize.

In one possible embodiment, the aforementioned reflective device may include a first reflective sheet and a second reflective sheet;

the first surface of the WDM is opposite to the first reflector plate, a second preset angle is formed between the reflecting surface of the first reflector plate and the vertical line, and a third preset angle is formed between the reflecting surface of the second reflector plate and the vertical line; the optical signals of the second wave band are diffracted to the first reflecting plate through the WDM, the first reflecting plate is used for diffracting the optical signals from the WDM to the second reflecting plate, and the second reflecting plate is used for diffracting the optical signals from the first reflecting plate to the second optical fiber inserting core; the second reflector sheet is also for reflecting the optical signal incident from the second fiber stub to the first reflector sheet, and the first reflector sheet is also for reflecting the optical signal from the second reflector sheet to the WDM.

Therefore, in the present embodiment, the plurality of reflection sheets are provided so that the outgoing light or the received light is parallel to the first optical fiber ferrule and the second optical fiber ferrule.

In one possible embodiment, the second preset angle is the sum of the first preset angle and a third preset angle, or the second preset angle is n+1 times the first preset angle, and the third preset angle is n times the first preset angle. Therefore, various arrangement angles may be set so that the outgoing light or the received light is parallel in the first optical fiber ferrule and the second optical fiber ferrule.

In one possible embodiment, the transceiver component may comprise: the device comprises a first transmitting component and a second receiving component, wherein the first transmitting component is used for transmitting the optical signals of the GPON or 10G PON, and the second receiving component is used for receiving the optical signals of the GPON or 10G PON. Therefore, in the embodiment of the present application, the transceiver module can implement the transceiver of multiple bands, and can be applied to multiple PON systems.

In one possible embodiment, the transceiver assembly further comprises a second transmitting assembly for transmitting the 50GPON optical signal. Thus, in the present embodiment, the outgoing signal of 50GPON is emitted by the separately provided emitting component.

In one possible implementation, the first transmitting component is further configured to transmit an optical signal of the 50G PON. Therefore, in the embodiment of the application, the emergent optical signals of the GPON, the 10GPON and the 50GPON can be transmitted by using the same component, so that the occupied space of the receiving and transmitting component can be reduced.

In one possible embodiment, the optical module further includes a first lens disposed at one end of the first optical fiber ferrule and a second lens disposed at one end of the second optical fiber ferrule. Therefore, in the embodiment of the application, the loss of the optical signal can be reduced by arranging the lens, and the divergence of the optical signal can be reduced.

In one possible embodiment, the housing is provided with an aperture for the provision of a periscope which can be used to measure the angle between the WDM and the vertical, and to determine from the measurement whether the angle is a first predetermined angle for facilitating subsequent correction.

In a second aspect, the present application provides an optical module comprising a printed circuit board (Printed Circuit Board, PCB) and an optical transceiver assembly secured to the PCB, the optical transceiver assembly may comprise an optical transceiver assembly as in the first aspect or any optional embodiment of the first aspect.

In a third aspect, the present application provides an optical communication device, which may comprise a printed circuit board (Printed Circuit Board, PCB), an input interface, an output interface and an optical module, the input interface and the output interface and the optical module being fixed on the PCB, which optical module may comprise an optical module as in the foregoing second aspect.

The optical communication device may comprise an optical line terminal (optical line terminal, OLT), an optical network unit (optical network unit, ONU) or an optical network terminal (optical network terminal, ONT).

In a fourth aspect, the present application provides an optical communication system, which may comprise an optical communication device as in the third aspect. In addition, the optical communication system may further include other devices, such as a router or a switch, which is not described herein.

Drawings

Fig. 1 is a schematic architecture diagram of an optical communication system provided in the present application;

fig. 2 is a schematic architecture diagram of another optical communication system provided in the present application;

fig. 3 is a schematic structural diagram of another optical communication system provided in the present application;

fig. 4 is a schematic structural diagram of another optical communication system provided in the present application;

fig. 5 is a schematic structural diagram of an optical transceiver module provided in the present application;

FIG. 6 is a schematic view of a light emitting assembly according to the present disclosure;

fig. 7 is a schematic structural diagram of a light receiving component provided in the present application;

fig. 8 is a schematic structural diagram of an optical transceiver module provided in the present application;

fig. 9 is a schematic structural diagram of another optical transceiver module provided in the present application;

fig. 10 is a schematic structural diagram of another optical transceiver module provided in the present application;

fig. 11 is a schematic structural diagram of another optical transceiver module provided in the present application;

fig. 12 is a schematic structural diagram of another optical transceiver module provided in the present application;

fig. 13 is a schematic structural diagram of another optical transceiver module provided in the present application;

fig. 14 is a schematic structural diagram of another optical transceiver provided in the present application;

fig. 15 is a schematic structural diagram of another optical transceiver module provided in the present application.

Detailed Description

The following description of the technical solutions in the embodiments of the present application will be made with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

The present application provides an optical transceiver assembly, an optical module, and an optical communication device, which can be applied to various optical communication systems, including but not limited to: any one or a combination of a plurality of optical transport networks (optical transport network, OTN), optical access networks (optical access network, OAN), metropolitan area networks (Metropolitan Area Network, MAN), synchronous digital hierarchy (synchronous digital hierarchy, SDH), passive optical networks (passive optical network, PON), ethernet (Ethernet), or flexible Ethernet (flex), wavelength division multiplexing (wavelength division multiplexing, WDM) networks, etc.

For example, the optical transceiver module, the optical module and the optical communication device provided by the application can be applied to a PON system. The main applications of PON are called Fiber To x (FTTX), and may include various types (Fiber To The Home, FTTH), fiber To The roadside (Fiber-To-The-Curb, FTTC), fiber To The office (Fiber To The Office, FTTO), fiber To The building (Fiber To The Building, FTTB), etc., with The difference that The locations where The fibers are located are different. Wherein a two-stage spectroscopic scheme is typically employed, such as FTTH based on an equal-ratio optical splitter. The main optical fiber passes through the first-level optical splitter (for example, 1-path is divided into 4 paths), is connected with the second-level optical splitter (for example, 1-path is divided into 16 paths), and is branched and connected to the end user.

With the development of modern society, the explosion of information amount is increased, and especially the coming of big data age, the demand for network throughput is continuously increasing. Optical transmission is a mainstream of modern communication schemes, especially a newly built network, and an access network represented by fiber-to-the-home is being deployed in a large scale by virtue of the unique characteristics of ultra-high bandwidth, low electromagnetic interference and the like.

For example, as optical communications evolve, MANs may be constructed between various cities or regions. A MAN is typically interposed between a local area network and a wide area network and covers an area, such as a city, for interconnecting local area networks within the same area. Because of the local area network technology with active exchange element, the transmission delay in the network is small, the transmission medium mainly adopts optical cable, and the transmission rate is more than l00 megabit/s. An important use of MAN is as a backbone network by which hosts, databases, LANs, etc. located at different sites within the same-city are interconnected.

For example, as shown in fig. 1. First, the MAN architecture provided in the present application may be divided into multiple layers, such as a backbone layer 11, a convergence layer 12, and an access layer 13 shown in fig. 1, and the backbone layer may also be referred to as a core layer, and the optical communication devices provided in the present application may be node devices in the respective layers.

Backbone routers can be arranged in the backbone layer, and the backbone routers usually have large bandwidth, can realize high-capacity data throughput, such as gigabit or terabit line speed routers, or high-capacity asynchronous transfer mode (asynchronous transfer mode, ATM) switches, or high-capacity synchronous digital transmission constitution (Synchronous Digital Hierarchy, SDH) cross-difference multiplexing equipment and the like, so as to realize large-capacity data throughput. For example, an optical communication network may be established between multiple cities, and a sub-network covering each city may be understood as a MAN, where multiple MANs are interconnected, and nodes interconnecting the multiple MANs may form a backbone layer, where devices in the backbone layer need to have a capability of implementing a large amount of data throughput.

The convergence layer may include one or more routes such as ATM switches, centralized multiplexers, local area network switches, broadband access servers (broadband access server, BAS) or SDH multiplexing devices, etc., which may enable substantial data throughput. The convergence layer is arranged between the access layer and the backbone layer and is used for transmitting the data between the backbone layers by the equipment in the transmission access layer.

The access layer may be provided with a variety of devices that enable access to user equipment, such as digital subscriber line access multiplexers (digital subscriber line Access multiplexer, DSLAMs) or other routers or switches. The access layer may be accessed by using 10M/100M/1000M ethernet, and may be interconnected with a local area network (local area network, LAN), provide and area multipoint transmission services (local multipoint distribution services, LMDS), etc., and may be accessed by using an asymmetric digital subscriber line (asymmetric digital subscriber line, ADSL) or a Very high-bit-rate Digital Subscriber loop, VDSL) or a Cable Modem (Cable Modem), etc.

The optical communication network applied to access mainly exists in the form of PON (passive optical network), under the overall situation that the optical network is fully popularized, a large number of PON networks are laid, and the same huge number of communication devices are needed, and the related communication devices mainly consist of optical modules, and a single board and a frame where the optical modules are placed, namely optical line terminals (optical line terminal, OLT), as shown in fig. 2, each optical module corresponds to an optical fiber distribution network (ODN) and serves a certain number of users (each ONU represents a user). As a key structure in the optical network, the optical modules in the OLT and the ONU devices are responsible for performing photoelectric conversion and transmission on network signals, which is a basis for enabling the entire network to communicate normally. The PON system may include an OLT, an ODN, and at least one ONU, and the optical communication device provided in the present application may include the OLT, the ODN, or the ONU as shown in fig. 2.

The OLT is a core component of the optical access network and is used to provide data for one or more ONUs that are accessed, provide management, etc.

The ODN may comprise at least one optical splitting device and may further comprise an optical Fiber, in particular, the optical Fiber may further comprise a main Fiber (feed Fiber), a distribution Fiber (distribution Fiber) and a drop Fiber (drop Fiber). The trunk optical fiber, i.e., the optical fiber to which the OLT is connected with the ODN, and the distribution optical fiber and the branching optical fiber may also be referred to as a branch optical fiber. The branching optical fiber is an optical fiber connected between the optical splitting device and the accessed ONU, and the distribution optical fiber is an optical fiber connected between the optical splitting devices in the ODN. And, when only one spectroscopic device is included in the ODN, there is no distribution fiber.

The ONU is configured to receive data sent by the OLT, respond to a management command of the OLT, buffer ethernet data of the user, and send the data in an upstream direction in a sending window allocated by the OLT, and so on. The OLT is configured to provide data to one or more ONUs that are accessed, provide management, and so on. The OLT may be configured to send an optical signal to at least one ONU, receive information fed back by the ONU, and process information fed back by the ONU, or other data, etc.

In addition, the PON system may establish a connection with a network or a device such as a public switched telephone network (public telephone switching network, PTSN), the internet (internet), or cable television (CATV).

It should be understood that at least one ONU in fig. 2 of the present application may include an optical network terminal (optical network termination, ONT) or a multiplexing unit (MXU), and the at least one ONU may also be replaced by at least one optical network terminal (optical network termination, ONT), or may include both an ONU and an ONT in at least one device accessing the ODN.

Currently, PON networks deployed on a large scale include two types of optical networks, namely, an EPON and a GPON with a downstream wavelength of 1490nm and an upstream wavelength of 1310nm, and a 10G EPON and a 10G GPON with a downstream wavelength of 1577nm, wherein the two types of optical networks support 2.5G, 1.25G or 10G at rates, and as the network bandwidth is upgraded, the network to be deployed in the next generation is a 50G PON, and the supported rates are 50G. This involves the problem of coexistence with the original large-scale GPON, EPON optical assemblies, and 10G GPON, 10G EPON.

Generally, PON can be specifically classified into Gigabit passive optical network (Gigabit passive optical network, GPON), ethernet passive optical network (ethernet passive optical network, EPON), 10G Gigabit passive optical network (10G Gigabit-capable passive optical network, XGPON), 10G ethernet passive optical network (10G ethernet passive optical network,10G EPON) or 50G Gigabit passive optical network (50G Gigabit-capable passive optical network,50 GPON) and the like according to transmission rate or substitution.

For example, uplink and downlink wavelengths respectively corresponding to GPON, 10GPON, and 50GPON may be as shown in table 1.

	Downstream wavelength (nm)	Upstream wavelength (nm)
			GPON	1480～1500	1290～1330
XGPON(XGS-PON)	1575～1581	1260～1280
			50GPON	1340～1344	1284～1288

TABLE 1

The PON belongs to a system in which uplink and downlink coexist, and uses a single-fiber bidirectional optical component to transmit optical signals, so that a plurality of different PONs coexist along with the evolution of a network.

For example, if a combo network of GPON and 10G PON has been deployed on a PON network,50G upgrades are to be performed including both the users of GPON and the users of 10G PON. If an ODN network is re-assembled, the cost is high, so that expansion is required on the basis of the existing network. As shown in fig. 3, if a part of ONUs on the user side upgrades the 50G PON and another part of ONUs is not upgraded, a scenario may occur in which multiple communication frequency bands such as the GPON, the 10GPON, the 50G PON and the like exist simultaneously in the same ODN network, and the OLT needs to communicate with the ONUs, so that on the OLT side, a transceiver module supporting different frequency bands is also needed.

Since different wavelengths are transmitted in the same network, the concept of Wavelength Division Multiplexing (WDM) is necessarily involved, and in short, different wavelengths represent different signal transmission channels, which are superimposed together and can be transmitted in a common optical fiber. At the OLT and ONU, it is necessary to perform the splitting or combining process.

As shown in fig. 4, components supporting GPON, 10GPON Combo, and 50G PON may be combined by a three-mode Combo PON optical module (e.g., referred to as a three-mode Combo component). For the wavelength aspect of using optical signals, GPON may use 1490nm transmission, 1310nm reception, 10GPON uses 1577nm transmission, 1270nm reception, 50G PON uses 1342nm transmission, one wavelength (such as 1286nm or 1288 nm) between 1270nm and 1310nm reception, then in combo components, these three sets of reception and transmission need to be implemented, through a certain structural design, to achieve coexistence, a series of WDM is needed to perform wavelength merging and splitting, while considering that, in order to ensure that the signal received by the receiver is not subject to stray light of other wavelengths, the WDM used in front of the receiver needs a higher isolation, which is usually implemented through filter transmission. The uplink receiving wavelength of 50G PON is between the GPON 1310nm wavelength and the 10G PON 1270nm wavelength, the wavelength separation interval is very narrow, and how to separate the uplink receiving wavelength of 50G PON from the GPON 1310nm wavelength and the 10G PON 1270nm wavelength is a problem to be solved.

For example, in some existing schemes, three separate TOSAs and ROSAs may be used, with a completely separate transceiver structure. Through designing and manufacturing a square shell, a series of structures are added in the square shell and used for placing WDM filter sheets, two groups of TOSAs and ROSAs are placed around the square shell, and the whole structure is used for realizing three groups of transceiving functions of GPON, 10GPON and 50G PON. In this BOSA configuration, only 50G TOSAs are in the transmit path, and the remaining TOSAs and ROSAs are in the reflect path.

However, in the scheme using three TOSAs and ROSAs, the uplink receiving wavelength of the 50G PON can be separated through WDM1, a reflector plate, and WDM2, and the WDM1, the reflector plate, and the WDM2 need to be fixed in a square housing by glue or welding, and an angular deviation is inevitably introduced during the fixing. Wherein WDM1, the reflective sheet is reflective to the uplink receiving wavelength of 50G PON, WDM2 is transmissive, assuming that WDM1 has an angle deviation a, the reflective sheet has an angle deviation b, and WDM2 has an angle deviation c, then the angle deviation a=2a+2b+c of the incident angle when light is incident to WDM2, the uplink receiving wavelength of 50G PON is between the wavelength of GPON 1310nm and the wavelength of 10G PON 1270nm, the wavelength separation is very narrow, WDM2 requires a very small angle deviation of the incident angle to separate these wavelengths, allowing the angle deviations of a, b, c to be smaller, thus providing an extremely high requirement for the angle deviation of fixed fabrication, assuming that a requirement is less than 0.5 degrees, the corresponding requirement a, b, c is less than 0.1 degree, the fixed fabrication level that is difficult to achieve by the current technology is high in cost. On the other hand, the angle deviation a of the incident angle of WDM2 will accumulate into GPON ROSA and 10G PON ROSA, and the fixed manufacturing angle deviation of WDM4 further increases through WDM3, so that it is difficult for WDM3 to separate GPON upstream receiving wavelength from 10G PON upstream receiving wavelength, and the performance of WDM4 is degraded, so that it is difficult to meet the requirements of add loss and drop isolation.

Therefore, the application provides an optical transceiver module and an optical communication device, which can solve the problem of uplink receiving wavelength branching of a three-mode combo optical module 50G PON and the problem of uplink receiving branching of GPON and 10G PON caused by the accumulation of angle deviation.

In an optical communication system, bi-directional Optical sub-assembly (BOSA) in an optical module is an important component by which transmission and reception of an optical signal are achieved. Generally, as shown in fig. 5, the structure of the BOSA may include a transmit TO (TOSA) and a receive TO (ROSA) structure embedded in a housing, TO respectively implement a transmitting function and a receiving function, the TOSA may be used TO convert an electrical signal into an optical signal, and input the optical signal into an optical fiber network for transmission, and the ROSA may be used TO receive the optical signal and perform electrical signal conversion on the optical signal, so as TO obtain a processable optical signal. In general, the wavelengths of transmission and reception are different, and by placing a WDM structure in a metal housing to separate the transmission wavelength from the reception wavelength, the WDM can be used to transmit a certain wavelength of light, and reflect other wavelengths of light, for example, in the optical transceiver provided in the present application, an optical signal of an uplink reception wavelength of a 50G PON can be transmitted, and an optical signal of other wavelengths can be reflected. Further, for separate TOSAs and ROSAs, the package is typically implemented in the form of a coaxial TO-CAN

Specifically, the TOSA may be configured as shown in fig. 6 and the ROSA may be configured as shown in fig. 7.

The TOSA and ROSA structures shown in fig. 6 and 7 are each formed by combining a metal stem 65 with pins and a cap 61 with a lens 65, and further include a signal light source (laser chip) for optical communication, such as a laser diode LD63 and a photodiode PD64 on the stem shown in fig. 6, and a photodiode PD73 of the stem shown in fig. 7, and a receiver for receiving optical signals. The ROSA header shown in fig. 7 also has a capacitor 76 and a transimpedance amplifier TIA77, both of which are placed in a form on the TO base. In general, pins on the TO base are respectively connected with signal electrodes on the LD and the transimpedance amplifier TIA by using wires, so that external electric signals can be transmitted TO the LD TO perform electro-optical conversion, meanwhile, signals which are photoelectrically converted by the PD can be output. The pins are generally separated from the substrate by glass cement, and are electrically isolated, while the whole substrate is generally used as a ground plane and is connected with the outside through a special pin connected with the substrate. The above-mentioned various connections are all implemented by adopting gold wire welding.

Meanwhile, due to the material characteristics of the devices such as the transmitter, the receiver and the like, sensitivity to moisture, oxygen and the like in the environment exists, and if the devices are exposed to corresponding gases, the performance of the devices is deteriorated with the lapse of time, so that faults are caused. Thus, devices in the form of TO packages are manufactured using a hermetic process, as follows: and welding the TO pipe cap and the TO base in a pure nitrogen environment.

The optical module is connected with peripheral circuits through pins for receiving and transmitting TO, and then is arranged in an optical module shell TO form an optical module structure. The structure of the optical transceiver module provided in the present application is described below.

First, the optical transceiver component provided by the application may include WDM, a reflecting device, a first optical fiber ferrule, a second optical fiber ferrule, a first receiving component, a transceiver component, and a housing, where the WDM, the reflecting device, the first optical fiber ferrule, the second optical fiber ferrule, the first receiving component, and the transceiver component, and the first optical fiber ferrule and the second optical fiber ferrule are disposed on two opposite sides of the housing.

The WDM is used for enabling optical signals of a first wave band and optical signals of a second wave band in optical signals incident from the first optical fiber inserting core to be incident to the first receiving component for receiving, and enabling the optical signals of the second wave band to be reflected to the second optical fiber inserting core through the reflecting component after being diffracted to the reflecting device and transmitted to the receiving and transmitting component through the second optical fiber inserting core for receiving;

the receiving and transmitting component is also used for transmitting optical signals through the second optical fiber inserting core, and the reflecting device is also used for reflecting the optical signals incident from the second optical fiber inserting core to the WDM, and transmitting the optical signals after the optical signals are reflected to the first optical fiber inserting core through the WDM.

Therefore, in the embodiment of the application, the optical signal of the first band can be separated, and the first band can include an uplink band of 50GPON, so that three-mode transceiving can be realized through fewer devices. The optical module is equivalent to a ROSA ferrule assembly and a post-BOSA optical assembly separated according to a receiving and transmitting function.

For example, taking an example that the reflective device includes two reflective sheets, i.e., a first reflective sheet and a second reflective sheet, referring to fig. 8, a schematic structural diagram of an optical transceiver assembly is provided herein.

The optical transceiver assembly may include a WDM 81, a first reflective sheet 82, a second reflective sheet 83, a first fiber stub 84, a second fiber stub 85, a first receiving assembly 86, a transceiver assembly 87, and a housing 88. The first and second fiber ferrules 84 and 85 are disposed on opposite sides of the housing.

The first surface of the WDM 81 is opposite to the output end of the first optical fiber ferrule and the reflection assembly, a first preset angle is formed between vertical lines of the WDM, the second surface of the WDM is opposite to the first receiving assembly, and the vertical lines are lines perpendicular to the optical path in the first optical fiber ferrule;

the WDM 81 is opposite to the reflecting surface of the first reflecting sheet 82, and is configured to receive, from the optical signals incident from the first optical fiber ferrule 84, the optical signals of the first wavelength band and the optical signals of the second wavelength band, the optical signals of the first wavelength band being incident to the first receiving component 86, the optical signals of the second wavelength band being diffracted by the reflecting component and then reflected by the reflecting component to the second optical fiber ferrule 85, and being transmitted by the second optical fiber ferrule to the transmitting/receiving component 87 for reception;

the transceiver module 87 is further configured to transmit an optical signal through the second optical fiber ferrule 85, and the reflecting device is further configured to reflect an optical signal incident from the second optical fiber ferrule to the WDM, and transmit the optical signal after being reflected by the WDM to the first optical fiber ferrule.

Therefore, in the embodiment of the present application, in receiving the optical signal, the optical signal of the first wavelength band is separated by WDM and received by a separately provided receiving component, and the optical signal of the second wavelength band is transmitted to the receiving component for reception. Thus, multi-band transmission and reception can be achieved by separating the uplink signal of the first band.

Optionally, a lens may be disposed at one end of the first fiber stub or the second fiber stub. For example, as shown in fig. 9, a lens 841, i.e., a first lens, may be provided at an end of the first fiber stub 84 disposed in the housing, and a lens 851, i.e., a second lens, may be provided at an end of the second fiber stub 85 disposed in the housing. Thereby reducing the loss of light incident or exiting the ferrule fiber.

Specifically, the aforementioned first band may include optical signals of an upstream band of a GPON, a 10G PON or a 50GPON, and the second band may include optical signals of other bands than the first band.

Taking the aforementioned example of fig. 8 as an example, when the incident light passes through the WDM 81, the 50G PON uplink receiving wavelength is transmitted, the other GPON, 10GPON, and the 50G PON transmitting wavelength are reflected, the transmitted 50G uplink receiving wavelength enters the 50G uplink ROSA, the other GPON, 10G PON, and the 50G transmitting wavelength is reflected by the WDM1, and the reflecting sheet 1 and the reflecting sheet 2 are reflected into the optical fiber ferrule 2, thereby completing the separation of the 50G uplink receiving wavelength from the other wavelengths.

The 50G uplink receiving wavelength only needs to be transmitted once to finish the wave division, and the incident angle deviation of the wave division only depends on the fixed manufacturing angle deviation of the WDM 1. Meanwhile, the 50G uplink receiving wavelength is transmitted only once, so that the optical insertion loss of the 50G high-speed receiving is small, and the 50G PON high-power budget is met. On the other hand, the angular deviation of the fixed fabrication introduced by WDM1, reflector plate 2 will be terminated by the fiber ferrule 2: the reflected light passes through WDM1, reflector plate 2 and then through lens coupling into only fiber ferrule 2.

In addition, in this embodiment of the present application, when the WDM, the first reflective sheet, and the second reflective sheet are disposed, the optical signals incident on the first reflective sheet may be reflected to the second reflective sheet, the optical signals incident on the second wavelength band of the WDM may be diffracted into the first reflective sheet, and the optical signals incident from the second reflective sheet may be diffracted into the first reflective sheet, thereby realizing transmission of the incident optical signals and the outgoing optical signals.

Alternatively, the arrangement manner in which the WDM, the first reflective sheet, and the second reflective sheet are arranged may include a plurality of kinds. For example, a vertical line is selected as a reference, which may include a line perpendicular to the optical path in the first fiber stub.

For ease of understanding, the aforementioned first preset angle is denoted as α, the second preset angle is denoted as β, and the third preset angle is denoted as γ.

Alternatively, the arrangement may be such that β=γ+α is chosen so that the light incident on the second fiber stub is parallel to the light exiting from the first fiber stub. As shown in fig. 10, the referenced vertical line may be a line perpendicular to the light of the first fiber stub as shown in fig. 10. The included angle between the WDM and the vertical line is alpha, the included angle between the first reflecting sheet and the vertical line is beta, the included angle between the second reflecting sheet and the vertical line is gamma, and beta=gamma+alpha.

Alternatively, β, γ, α may be integer multiples of one angle, so that β, γ, α may be processed at the same time by dividing or multiplying the angle based on one standard angle, so that the tolerance of the precision of these angles may be positive or negative offset at the same time, and the tolerance of the system may be eliminated by calibration, so that the precision of the incident angle of WDM1 may be achieved, and the precision of the exit angle of the reflective sheet 2 may be ensured. As can be expressed as β=n×α, γ= (n+1) ×α.

For example, as shown in fig. 11, the angle between the WDM and the vertical line is α, the angle between the first reflective sheet and the vertical line is β, the angle between the second reflective sheet and the vertical line is γ, and β=n×α, γ=(n+1) ×α, n may be a positive integer.

It can be understood that in the embodiment of the present application, the GPON and 10G PON transmissions and the GPON and 10G PON receptions in the BOSA optical module are respectively encapsulated in the same TO or BOX, and the 50G PON transmissions are encapsulated in one TO or BOX, so as TO form a splitter for completing the GPON, 10G PON and 50G PON transmissions by one BOSA. And the multiband receiving and transmitting assembly, namely the multiband BOSA optical assembly and the 50G PON ferrule ROSA optical assembly are optically coupled and fixed, so that the three-mode optical assembly is realized.

The structure of the optical transceiver module provided herein is described below in connection with the structure of a multiband transceiver module.

First, the multiband transceiver module may be divided into various structures, for example, the transceiver module may include at least one transmitting module and at least one receiving module, so as to distinguish between a first transmitting module and a second receiving module, where the first transmitting module may be used to transmit an outgoing optical signal of GPON or 10GPON, and the second receiving module may be used to receive an uplink received optical signal of GPON or 10 GPON.

Alternatively, the outgoing optical signal of 50GPON may be sent by the first transmitting component, or the second transmitting component may be separately provided to transmit the outgoing optical signal of 50 GPON.

For example, as shown in fig. 12, the transmitting functions of the outgoing optical signals of the GPON, the 10G PON and the 50G PON may be simultaneously implemented by one transmitting assembly, while one ROSA is provided to receive the uplink received optical signals of the GPON and the 10G PON. It will be understood that the multiband BOSA module shown in fig. 12 encapsulates GPON, 10G PON transmission and 50G PON transmission into the same TO, and encapsulates 50G PON transmission into one TO or BOX, and encapsulates GPON, 10G PON reception into the same TO or BOX, thereby forming a BOSA TO accomplish the branching of GPON, 10G PON,50G PON transmissions. Thus, the BOSA optical assembly and the ferrule ROSA optical assembly are optically coupled and fixed together by combining the ferrule ROSA optical assembly, and the three-mode optical assembly is realized.

Alternatively, as shown in fig. 13, the GPON transmission, the 10G PON transmission, and the 50G PON transmission may be packaged into one TO, and the GPON transmission and the 10G PON reception may be packaged into the same TO. Thus, a multiband BOSA is formed to realize GPON, 10G PON and 50G PON transceiver modules. Thus, the BOSA optical assembly and the ferrule ROSA optical assembly are optically coupled and fixed by combining the ferrule ROSA optical assembly, and the three-mode optical assembly is realized.

Alternatively, as shown in fig. 14, the GPON transmission, the 10G PON transmission, and the 50G PON transmission are respectively encapsulated in TO, thereby forming three TOSAs, that is, TOSA1, TOSA2, and TOSA3 as used in fig. 14, and the GPON, 10G PON reception is encapsulated in the same TO or BOX, thereby forming a multiband BOSA TO implement the GPON, 10G PON,50G PON transceiver module. Thus, the BOSA optical assembly and the ferrule ROSA optical assembly are optically coupled and fixed by combining the ferrule ROSA optical assembly, and the three-mode optical assembly is realized.

In addition, in order to ensure that WDM or reflector plate etc. are satisfactory, openings may be provided in the ROSA assembly. As shown in fig. 15, the aperture may be used to prevent the periscope from extending into the ROSA assembly, and to verify that the calibration identification signal, such as the active calibration red light emitted, is reflected by the WDM, passes through the periscope, and exits from the other side, so that the angles β and α may be calculated. Such as when β=α, verification and correction can be performed by a periscope, thereby ensuring β=α. Therefore, whether the WDM incident angle meets the requirement or not can be known by measuring the beta angle, and if not, the angle tolerance requirement can be met by adjusting the angles of the optical fiber insert core, the WDM or the reflecting sheet and the like. Thereby realizing ultra-narrow band light splitting of the three-mode optical assembly ROSA.

Therefore, the optical transceiver module provided by the application realizes three-mode transceiver of GPON, 10G PON and 50G PON, can be suitable for various PON systems, and has very strong generalization capability. The 50G PON uplink receiving and wave splitting can be completed through one-time transmission, the coupling insertion loss is small, the requirement on the WDM fixed manufacturing angle deviation is low, and the process is simple and easy to realize. And the optical transceiver component is divided into a ROSA (optical fiber array) core-insert component and a rear-stage BOSA optical component, and the WDM is terminated through the optical fiber core-insert, and the angle deviation of the reflector plate is fixedly manufactured, so that the manufacturing difficulty of the rear-stage BOSA optical component is reduced. The ROSA inserting core component and the rear BOSA optical component can be manufactured in parallel, and 2 are independent devices respectively, and the yield is not affected mutually, so that the manufacturing efficiency and the yield are improved.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.

In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods may be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of 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.

In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The terms first, second and the like in the description and in the claims of the present application and in the above-described figures, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances and are merely illustrative of the manner in which the embodiments of the application described herein have been described for objects of the same nature. Furthermore, the terms "comprises," "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a system, article, or apparatus that comprises a list of elements is not necessarily limited to those elements, but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The names of the messages/frames/information, modules or units, etc. provided in the embodiments of the present application are only examples, and other names may be used as long as the roles of the messages/frames/information, modules or units, etc. are the same.

The terminology used in the embodiments of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the embodiments of the present application, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that in the description of the present application, unless otherwise indicated, "/" means that the associated object is an "or" relationship, e.g., A/B may represent A or B; the term "and/or" in this application is merely an association relation describing an association object, and means that three kinds of relations may exist, for example, a and/or B may mean: there are three cases, a alone, a and B together, and B alone, wherein a, B may be singular or plural.

The above embodiments are merely for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims (11)

1. An optical transceiver module, comprising:

the optical fiber receiving device comprises a WDM (wavelength division multiplexing) device, a reflecting device, a first optical fiber inserting core, a second optical fiber inserting core, a first receiving component, a transmitting and receiving component and a shell;

the WDM, the reflecting device, the first optical fiber inserting core and the second optical fiber inserting core are arranged inside the shell, and the first optical fiber inserting core and the second optical fiber inserting core are arranged on two opposite sides of the shell;

the first surface of the WDM is opposite to the output end of the first optical fiber ferrule and the reflecting device, a first preset angle is formed between vertical lines of the WDM, the second surface of the WDM is opposite to the first receiving component, and the vertical lines are perpendicular to the optical path in the first optical fiber ferrule;

the WDM is configured to receive, from the optical signals incident from the first optical fiber ferrule, an optical signal of a first wavelength band and an optical signal of a second wavelength band, where the optical signal of the first wavelength band is incident to the first receiving component and is received, and the optical signal of the second wavelength band is diffracted by the reflecting device and then reflected by the reflecting device to the second optical fiber ferrule, and is transmitted by the second optical fiber ferrule to the transceiver component to be received;

the receiving and transmitting component is also used for transmitting optical signals through the second optical fiber inserting core, the reflecting device is also used for reflecting the optical signals incident from the second optical fiber inserting core to the WDM, and the optical signals are transmitted after being reflected to the first optical fiber inserting core through the WDM.

2. The optical transceiver assembly of claim 1, wherein the reflective device comprises a first reflective sheet and a second reflective sheet;

the first surface of the WDM is opposite to the first reflector plate, a second preset angle is formed between the reflecting surface of the first reflector plate and the vertical line, and a third preset angle is formed between the reflecting surface of the second reflector plate and the vertical line;

the optical signal of the second wave band is diffracted to the first reflector plate through the WDM, the first reflector plate is used for diffracting the optical signal from the WDM to the second reflector plate, and the second reflector plate is used for diffracting the optical signal from the first reflector plate to the second optical fiber ferrule;

the second reflective sheet is further configured to reflect an optical signal incident from the second optical fiber ferrule to the first reflective sheet, and the first reflective sheet is further configured to reflect an optical signal from the second reflective sheet to the WDM.

3. The optical transceiver assembly of claim 2, wherein the second preset angle is a sum of the first preset angle and the third preset angle, or wherein the second preset angle is n+1 times the first preset angle and the third preset angle is n times the first preset angle.

4. An optical transceiver module as claimed in any one of claims 1-3, wherein the transceiver module comprises: the optical transmitter comprises a second receiving component and a first transmitting component, wherein the first transmitting component is used for transmitting optical signals of the GPON or 10G PON, and the second receiving component is used for receiving the optical signals of the GPON or 10G PON.

5. The optical transceiver module of claim 4, further comprising a second transmitting module for transmitting an optical signal of the 50G PON.

6. The optical transceiver module of claim 4, wherein the first transmitting module is further configured to transmit an optical signal of 50 GPON.

7. The optical transceiver module of any one of claims 1-3, further comprising a first lens disposed at one end of the first fiber stub and a second lens disposed at one end of the second fiber stub.

8. A light transceiver as recited in any one of claims 1-3, wherein said housing is provided with an aperture for providing a periscope for measuring said first predetermined angle.

9. An optical module comprising a printed circuit PCB and an optical transceiver assembly, the optical transceiver assembly being secured to the PCB, the optical transceiver assembly comprising an optical transceiver assembly as claimed in any one of claims 1 to 8.

10. An optical communication device comprising an input interface, an output interface, a printed circuit PCB board, and an optical module, said input interface and said output interface and said optical module being secured to said PCB board, said optical module comprising an optical transceiver assembly according to claim 9.

11. The device according to claim 10, characterized in that the optical communication device comprises at least one of an optical line terminal OLT, an optical network unit ONU, or an optical network terminal ONT.