WO2021004387A1

WO2021004387A1 - Tosa, bosa, optical module, and optical network device

Info

Publication number: WO2021004387A1
Application number: PCT/CN2020/100070
Authority: WO
Inventors: 周恩宇; 李书; 王海丽; 董英华; 王衡
Original assignee: 华为技术有限公司
Priority date: 2019-07-05
Filing date: 2020-07-03
Publication date: 2021-01-14
Also published as: CN110417476B; CN110417476A

Abstract

A TOSA, a BOSA, an optical module, and an optical network device, allowing the overall size of an optical transceiver assembly to be further reduced. The TOSA comprises a first optical transmitter, a second optical transmitter, a reflective structure, a first beam-combining structure, an integrated optical transmission part, and a packaging component. A first lens part, a second lens part, a first fixing part used for placing the reflective structure, and a second fixing part used for placing the first beam-combining structure are provided on the integrated optical transmission part. An optical outlet is provided on the packaging component. The first lens part is used for coupling a first optical signal from the first transmitter to the reflective structure. The reflective structure reflects the first optical signal to the first beam-combining structure. The second lens part is used for coupling a second optical signal from the second optical transmitter to the first beam-combining structure. The first beam-combining structure is used for combining the first optical signal reflected by the reflective structure with the second optical signal transmitted by the second lens part and outputting to the optical outlet.

Description

A TOSA, BOSA, optical module and optical network equipment

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office, the application number is 201910604378.5, and the invention title is "a TOSA, BOSA, optical module and optical network equipment" on July 5, 2019, the entire content of which is incorporated by reference Incorporated in this application.

Technical field

This application relates to the field of optical communications, and in particular to a TOSA, BOSA, optical module and optical network equipment.

Background technique

At present, passive optical networks (PON) deployed on a large scale include Ethernet passive optical networks (Ethernet passive optical network, EPON) and Gig-bit passive optical networks (Gig-bit passive optical network, GPON) With the upgrade of network bandwidth, the next-generation networks to be deployed are 10G-EPON and 10G-GPON. In order to solve the coexistence problem of EPON and GPON and 10G-EPON and 10G-GPON, taking GPON as an example, optical line terminals (optical line terminal, OLT) can use built-in wavelength division multiplexing (WDM) devices (such as The multiplexer or splitter) performs the multiplexing and multiplexing of the upstream and downstream wavelengths of the GPON and the 10G-GPON, so that the GPON optical module and the 10G-GPON optical module are combined into one to obtain a combo optical module.

An existing design method of the optical transceiver assembly (bi-directional optical sub-assembly, BOSA) in the combined optical module is to make a square housing and add a series of structures (such as WDM device and 0 degree filter) inside. Chip, etc.), and at the same time place two groups of optical transmitting components (transmitting optical sub-assembly, TOSA) and optical receiving components (receiving optical sub-assembly, ROSA) around the square housing, respectively, to realize GPON and 10G-GPON The two groups of transceiver functions.

However, in this design method, since two sets of TOSA and ROSA are used, and each set of TOSA and ROSA corresponds to optical signals of different wavelengths, there are a large number of WDM devices (multiplexers or demultiplexers) that need to be installed in the square housing. The overall optical path of the optical signal transmission in BOSA is longer, resulting in a larger overall size of BOSA manufactured according to this design method.

Summary of the invention

The embodiments of the application provide a TOSA, BOSA, optical module, and optical network equipment, so that the overall size of BOSA can be made smaller

In the first aspect, an embodiment of the present application provides a TOSA, including: a first optical transmitter, a second optical transmitter, a reflective structure, a first multiplexing structure, an integrated optical transmission component, and a packaging assembly, wherein the first The optical transmitter is used to generate the first optical signal of the first wavelength, and the second optical transmitter is used to generate the second optical signal of the second wavelength. The integrated optical transmission component is provided with a first lens part, a second lens part, and Place the first fixing part of the reflection structure and the second fixing part for the placement of the first multiplexing structure, the package assembly is provided with a light outlet, the first light emitter, the second light emitter, the reflection structure, and the first multiplexing structure The structure and the integrated optical transmission component are packaged inside the package assembly, the first light emitter and the reflection structure are arranged on the transmission light path of the first lens part, and the second light emitter and the first multiplexing structure are arranged on the second lens part And the first multiplexing structure is arranged on the reflection light path of the reflection structure, the first lens part is used to couple the first light signal from the first light transmitter to the reflection structure, and the reflection structure transfers the first light The signal is reflected to the first multiplexing structure, and the second lens part is used to couple the second optical signal from the second optical transmitter to the first multiplexing structure, and the first multiplexing structure is used to reflect the first light reflected by the reflective structure. The signal and the second optical signal transmitted by the second lens part are combined and output to the light exit.

In this embodiment, two optical transmitters that emit optical signals of different wavelengths are arranged in one TOSA, and the two optical signals of different wavelengths are combined and combined through the reflection structure, the first multiplexing structure, and the integrated optical transmission component. Output, since the first multiplexing structure is set inside TOSA to combine optical signals of different wavelengths, correspondingly, the number of multiplexers inside BOSA can be reduced in the process of combining the above TOSA to make BOSA, and the amount of optical signal transmission in BOSA is shortened. The overall optical path makes the overall size of BOSA smaller.

Optionally, in some possible embodiments, the first lens portion includes a first light-incident surface, and the first light-incident surface is an arc-shaped condensing surface provided on the integrated light transmission component; and the second lens portion includes a first light-incident surface. Two light-incident surfaces, the second light-incident surface is an arc-shaped light-concentrating surface arranged on the integrated light transmission component. The light incident surfaces of the first lens part and the second lens part are opened on the surface of the integrated light transmission component, making the structure of the integrated light transmission component more stable and compact, and the arc-shaped condensing surface can converge the divergent light into Parallel light.

Optionally, in some possible embodiments, the first fixing portion includes a first fixing surface, and the reflective structure is a reflective film disposed on the first fixing surface, or the reflective structure is a reflective film fixed on the first fixing surface. It should be noted that, in order to prevent the intensity of the light signal from attenuating during reflection, the reflective structure may adopt a total reflection film or a total reflection sheet, and the reflection structure may include a plurality of reflection films or emitting sheets, and the first optical signal passes through multiple The reflection of the reflection film or the reflection sheet is guided to the first multiplexing structure. The specific implementation manners of the reflective structure are listed above, which improves the practicability of the solution, and a reflective film or a reflective sheet is provided on the first fixing surface of the first fixing portion, which is more convenient for installation.

Optionally, in some possible implementation manners, the angle between the first fixed surface and the transmitted light path of the first lens portion is 45 degrees. The first optical signal enters the reflective structure at an incident angle of 45 degrees, so the reflected optical path is perpendicular to the incident optical path, the transmission optical path of the first optical signal is shorter, and the signal loss is smaller.

Optionally, in some possible embodiments, the second fixing portion includes a second fixing surface, and the first multiplexing structure is a multiplexing film disposed on the second fixing surface, or the first multiplexing structure is fixed on the The multiplexer on the second fixed surface. The specific implementations of the first multiplexing structure are listed above, which further improves the practicability of the solution.

Optionally, in some possible implementation manners, the angle between the second fixing surface and the reflected light path is 45 degrees. Under the premise that the included angle between the first fixed surface and the transmitted light path of the first lens part is 45 degrees, and the included angle between the second fixed surface and the reflected light path is 45 degrees, the first multiplexing The transmission direction of the first optical signal after the structure reflection is consistent with the transmission direction of the second optical signal.

Optionally, in some possible embodiments, the integrated light transmission component is further provided with a refractive surface, the refractive surface is located between the first fixing part and the second fixing part, the refractive surface is arranged on the reflection light path, and the refractive surface is used for The first optical signal reflected by the reflective structure is refracted to the first multiplexing structure. The refraction surface is provided between the reflective structure and the first multiplexing structure so that the first optical signal reflected by the reflective structure can be refracted to the first multiplexing structure, so the relative positional relationship between the first fixed surface and the second fixed surface can be improved. It is flexible and improves the scalability of this program.

Optionally, in some possible embodiments, the material of the integrated light transmission component is plastic or resin. It is understandable that the integrated light transmission component is made of light-transmitting material, and two possible specific materials are listed above to facilitate the realization of the solution.

Optionally, in some possible implementation manners, the first multiplexing structure is specifically used to reflect the first optical signal and transmit the second optical signal.

Optionally, in some possible implementation manners, the packaging component includes a base, a substrate fixed on the base, a first housing covered on the base, a first light emitter, a second light emitter, and an integrated light The transmission part is arranged on the substrate. A specific packaging method is provided, which improves the practicability of the solution.

Optionally, in some possible implementation manners, the first light emitter and the second light emitter are arranged side by side, and the emission light paths of the first light emitter and the second light emitter are parallel. The first light emitter and the second light emitter are arranged side by side, which is convenient for processing and has a more compact space.

Optionally, in some possible embodiments, the first wavelength is 1490 nanometers and the second wavelength is 1577 nanometers, or the first wavelength is 1577 nanometers and the second wavelength is 1490 nanometers. It can realize the transmission of GPON and XGPON optical signals.

Optionally, in some possible implementation manners, the first light emitter and the second light emitter are laser diodes, which improves the feasibility of this solution.

In the second aspect, an embodiment of the present application provides a BOSA, including: the TOSA, the second housing, the ROSA, and the second multiplexing structure in any implementation manner of the first aspect, the second housing is provided with optical transmission Channel, the second multiplexer is arranged in the optical transmission channel, the second housing is provided with an optical receiving port, an optical transmitting port, and an optical fiber connection port communicating with the optical transmission channel, TOSA is encapsulated in the optical transmission port, and ROSA is encapsulated in the optical On the receiving port, the second multiplexer is used to transmit the first optical signal and the second optical signal from the TOSA to the optical fiber connection port, and reflect the third optical signal from the optical fiber connection port to the ROSA. Since the first multiplexing structure is set inside TOSA to combine optical signals of different wavelengths, the number of internal multiplexers in BOSA can be reduced accordingly, and the overall optical path of optical signal transmission in BOSA can be shortened, so that the overall size of BOSA can be made. smaller.

Optionally, in some possible implementation manners, the optical transmission channel includes a first optical channel connected between the optical transmitting port and the optical fiber connection port, and a second optical channel connected between the optical receiving port and the first optical channel. Channel, the second multiplexing structure is arranged at the junction of the first optical channel and the second optical channel. The light path structure is simple and conforms to the existing BOSA shell manufacturing process, thereby improving the manufacturing efficiency.

In a third aspect, an embodiment of the present application provides an optical module, which includes the TOSA in any implementation manner of the first aspect, or includes the BOSA in any implementation manner of the second aspect.

In a fourth aspect, an embodiment of the present application provides an optical network device, including the optical module in the technical solution of the third aspect.

Optionally, in some possible implementation manners, the optical network device may be an optical line terminal or an optical network unit.

It can be seen from the above technical solutions that the embodiments of the present application have the following advantages:

In the embodiment of the present application, the first lens part can couple the first light signal from the first light emitter to the light reflecting structure, and the light reflecting structure reflects the first light signal to the first multiplexing structure, and the second lens part can The second optical signal from the second optical transmitter is coupled to the first multiplexing structure, and then the first multiplexing structure multiplexes the first optical signal and the second optical signal, and outputs to the optical outlet. It can be seen that two optical transmitters emitting optical signals of different wavelengths are set in one TOSA, and the two optical signals of different wavelengths are combined and combined through the reflection structure, the first multiplexing structure and the integrated optical transmission component. Output, since the first multiplexing structure is set inside TOSA to combine optical signals of different wavelengths, correspondingly, the number of multiplexers inside BOSA can be reduced in the process of combining the above TOSA to make BOSA, and the amount of optical signal transmission in BOSA is shortened. The overall optical path makes the overall size of BOSA smaller.

Description of the drawings

Figure 1 is a schematic diagram of the network structure of a PON scenario;

Figure 2 is a schematic diagram of the structure of BOSA;

Figure 3 is a schematic diagram of TOSA and ROSA using TO package;

Figure 4 is a schematic diagram of the network structure of the GPON and XGPON convergence scenario;

Figure 5 is a schematic diagram of a structure of BOSA in the combo optical module;

FIG. 6 is a schematic structural diagram of an optical transceiver component in an embodiment of the application;

FIG. 7 is a schematic diagram of a structure of TOSA in an embodiment of the application;

FIG. 8 is a schematic diagram of a structure of an integrated optical transmission component in an embodiment of the application;

9 is a schematic diagram of another structure of an integrated optical transmission component in an embodiment of the application;

10 is a schematic diagram of another structure of an integrated optical transmission component in an embodiment of the application;

FIG. 11 is a front view of a packaging structure of TOSA in an embodiment of the application;

FIG. 12 is a side view of a packaging structure of TOSA in an embodiment of the application.

Detailed ways

The embodiments of the present application provide a TOSA, an optical transceiver component, an optical module, and an optical network device. Set up two optical transmitters that emit optical signals of different wavelengths in a TOSA, and combine and output the two optical signals of different wavelengths through the reflection structure, the first multiplexing structure and the integrated optical transmission component. One component of the above TOSA can be compatible with PON systems of different wavelengths, for example, compatible with GPON systems and XGPON systems, or compatible with XGPON systems and time-and wavelength-division multiplexing (TWDM) PON systems, or Compatible with GPON system and 25 gigabit per second PON (25G-PON) system, etc., correspondingly can reduce the number of WDM devices inside the optical transceiver assembly, and shorten the overall optical path of optical signal transmission in the optical transceiver assembly , So that the overall size of the optical transceiver components can be made smaller.

The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects, without having to use To describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments described herein can be implemented in an order other than the content illustrated or described herein. In addition, the terms "including" and "having" and any variations of them 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 the clearly listed Those steps or units may include other steps or units that are not clearly listed or are inherent to these processes, methods, products, or equipment.

The following describes the concepts involved in the embodiments of the present application:

Passive Optical Network (PON): Passive optical network refers to the optical distribution network (optical distribution network) between the optical line terminal (OLT) and the optical network unit (ONU). ODN), without any active electronic devices.

The technical solutions of the embodiments of the present application can be applied to compatibility between various passive optical network (PON) systems. For example, PON systems include next-generation PON (next-generation PON, NG-PON) and NG-PON systems. PON1, NG-PON2, gigabit PON (gigabit-capable PON, GPON), 10 gigabit per second PON (10 gigabit per second PON, XG-PON), symmetrical 10 gigabit passive optical network (10-gigabit- capable symmetric passive optical network, XGS-PON), Ethernet PON (Ethernet PON, EPON), 10 gigabit per second EPON (10 gigabit per second EPON, 10G-EPON), next-generation EPON (next-generation EPON, NG- EPON), wavelength-division multiplexing (WDM) PON, time-and wavelength-division multiplexing (TWDM) PON, point-to-point (P2P) WDM PON (P2P) -WDM PON), asynchronous transfer mode PON (asynchronous transfer mode PON, APON), broadband PON (broadband PON, BPON), etc., and 25 gigabit per second PON (25 Gigabit per second PON, 25G-PON), 50 Gigabit per second PON (50 gigabit per second PON, 50G-PON), 100 gigabit per second PON (100 gigabit per second PON, 100G-PON), 25 gigabit per second EPON (25 gigabit per second EPON, 25G- EPON), 50 gigabit per second EPON (50 Gigabit per second EPON, 50G-EPON), 100 gigabit per second EPON (100 gigabit per second EPON, 100G-EPON), and other rates of GPON, EPON, etc.

Optical distribution network (Optical distribution network, ODN): ODN is a fiber-to-the-home optical cable network based on PON equipment. Its function is to provide optical transmission channel between OLT and ONU.

Wavelength division multiplexing (WDM): Wavelength division multiplexing is the combination of two or more optical carrier signals of different wavelengths (carrying various information) at the transmitting end through a multiplexer (also called a multiplexer) The technology of transmitting together and coupled to the same optical fiber of the optical line; at the receiving end, the optical carriers of various wavelengths are separated by a demultiplexer (also called a demultiplexer or demultiplexer), and then Further processing by the optical receiver to restore the original signal. This technology of simultaneously transmitting two or more optical signals of different wavelengths in the same optical fiber is called wavelength division multiplexing.

Optical transmission module: abbreviated as optical module, which includes two parts: Bi-directional Optical Sub-assembly (BOSA) and Electronic Subassembly (ESA). Electrically connect the pins of the optical transceiver component with the peripheral electronic components (ESA), and then install the optical module housing to form an optical transmission module.

Optical transceiver components (Bi-directional Optical sub-assembly, BOSA): Mainly include optical transmitting components (Transmitting Optical sub-assembly, TOSA) and optical receiving components (Receiving Optical sub-assembly, ROSA).

Transmitting Optical Sub-assembly (TOSA): The function of TOSA is to convert electrical signals into optical signals and input them into optical fibers for transmission.

Receiving Optical Sub-assembly (ROSA): The function of ROSA is to receive the optical signal transmitted by the optical fiber and convert it into an electrical signal.

Please refer to Figure 1. This application is mainly applied to passive optical networks (PON). Under the overall situation of the full popularity of optical networks, a huge number of communication equipment, such as OLT and ONUs, are needed. The communication equipment is mainly composed of an optical module and a single board and a frame where the optical module is placed. Each optical module corresponds to an ODN and serves a certain number of users (each ONU represents a user). As a key component of the optical network, the optical modules in the OLT and ONU are responsible for the photoelectric conversion and transmission of network signals, which are the basis for the normal communication of the entire network.

Please refer to FIG. 2, an important component in the optical module is a bi-directional optical sub-assembly (BOSA), which is used to realize the transmission and reception of optical signals. It can be seen from Figure 2 that the BOSA includes a housing 201, a transmitting optical sub-assembly (TOSA) 202 embedded in the housing 05, and an optical receiving optical sub-assembly (ROSA) 203, which is set in the housing 05 The WDM device 204 (multiplexer or demultiplexer), and the optical fiber connection ferrule 205 and the optical fiber 206 connected to the end of the housing 201. Among them, the function of the optical transmitting component 202 is to convert electrical signals into optical signals and input the optical fiber 206 for transmission. The function of the optical receiving component 203 is to receive the optical signals transmitted by the optical fiber and convert them into electrical signals. Next, because the wavelengths of the transmitted and received light are different, it is necessary to place the WDM device 204 in the metal casing to separate the two types of wavelengths. The function of the WDM device 204 is to transmit light of certain wavelengths while reflecting other wavelengths. Of light. The light transmission path is shown by the solid arrow in FIG. 3. The light emitted by the light transmission component 202 is transmitted straight through the WDM device 204, and then enters the optical fiber 206 for transmission; the light receiving path is shown by the dotted arrow in FIG. When the optical signal passes through the WDM device 204, it is reflected, and the optical receiving component 203 is located on the reflected optical path, thereby realizing the receiving of the optical signal.

Please refer to Figure 3. TOSA and ROSA are generally packaged in the form of a coaxial tube shell (transistor-outline can, TO-CAN), which are assembled by a metal base with pins and a tube cap with a lens. Both the laser diode (LD) and the photodiode (PD) are placed on the metal base in a certain form. The pins on the base are respectively connected to the signal electrodes on the LD and the trans-impedance amplifier (TIA) by using gold wires, so that external electrical signals can be transmitted to the LD for electro-optical conversion. Generally, the pins and the substrate are separated by glass glue, and the two are electrically isolated. The entire substrate is used as a ground plane, and it is connected to the external ground through a special pin connected to the substrate. All the above-mentioned connections can be realized by gold wire welding. TOSA and ROSA are connected to peripheral circuits through the receiving and transmitting pins, and then installed into the optical module housing to form the optical module structure.

Please refer to Figure 4, the current large-scale deployment of PON networks, including EPON and GPON, two types of optical networks support the rate of 2.5G or 1.25G, as the network bandwidth upgrades the next generation of networks to be deployed is 10G- EPON and 10G-GPON (XGPON) support a rate of 10G. This involves the coexistence of the original large-scale GPON and EPON optical components. Therefore, the uplink and downlink wavelength multiplexing and multiplexing of GPON and XGPON are performed on the OLT side through the WDM device, and the optical module that can support any two different transmission rates at the same time can be called a combo optical module. For example, in an example Among them, the combined optical module can support any two of GPON, XGPON, 25G GPON, 50G GPON at the same time, or support any two of EPON, 10GEPON, 25G EPON, and 50G EPON at the same time. It can be understood that the foregoing combined optical module may also be referred to as an optical module.

Regarding the wavelength of optical signals, the optical line terminal in GPON uses a wavelength of 1490 nanometers for transmission and a wavelength of 1310 nanometers for reception, and the optical line terminal in XGPON uses a wavelength of 1577 nanometers for transmission and 1270 nanometers for reception. Then in the combined transceiver component, it is necessary to receive and send the optical signals of these two wavelengths through a certain structural design to achieve coexistence, which requires a series of WDM devices (multiplexer or demultiplexer) to perform The convergence and separation of the two wavelengths of light should be considered at the same time. In front of the receiver, a specific narrowband filter is needed to further filter out other possible stray light. For example, one should be placed in front of the 1270 nanometer receiver, which can only pass 1270. For the 0-degree filter of the band, in front of the 1310 receiver, place a 0-degree filter that can only pass the 1310 band.

In order to enable the combo optical module to support GPON and XGPON at the same time, please refer to Figure 5. Figure 5 is a schematic diagram of a structure of the BOSA in the above combo optical module. The BOSA includes a housing 05a, and the housing 05a is provided with a first optical transmitting component 06a And the second optical transmitting assembly 06b, as well as the first optical receiving assembly 07a and the second optical receiving assembly 07b, the housing is provided with a first splitter 08a, a second splitter 08b and a multiplexer 08c, the left end of the housing 05a It is the optical fiber inlet 051a. The 1270 nanometer optical signal enters the housing 05a through the optical fiber inlet 051a and is reflected by the first splitter 08a to the first light receiving component. The 1310 nanometer optical signal enters the housing through the optical fiber inlet 051a After 05a, it transmits through the first demultiplexer 08a and is reflected by the second demultiplexer 08b into the second optical receiving component 07b; the light sent by the first optical transmitting component 06a is reflected by the multiplexer 08c and then passes through the first The two splitter 08b and the first splitter 08a are emitted from the optical fiber access port 051a, and the light sent by the second optical transmission component 06b passes through the multiplexer 08c, the second splitter 08b and the first splitter 08a in turn It is sent out from the optical fiber access port 051a. The isolator in Figure 5 plays a role in reducing the effect of reflected light in the network on the performance of the laser. The 0-degree filter 010 in Figure 5 is used to filter out other stray light.

The structure of Figure 5 uses two sets of completely independent transceiver components. A special case is designed and manufactured, and a series of fixed structures are added to the case to place multiple WDM devices (multiplexer or demultiplexer), 0-degree filter and isolator. At the same time, the two sets of TOSA The ROSA and ROSA are placed around the square shell, and the whole structure is used to realize the two groups of GPON and XGPON transceiver functions. However, in this design method, because two sets of TOSA and ROSA are used, each set of TOSA and ROSA corresponds to optical signals of different wavelengths, so there are a large number of WDM devices that need to be installed in the square housing, and the overall optical signal transmission in the optical transceiver assembly The optical path is long, resulting in a larger overall size of the optical transceiver assembly manufactured in this design method. Therefore, in the subsequent optical module manufacturing process, the total length of the circuit and optical components cannot be controlled, which leads to the need to increase the housing of the optical module. For optical modules, the size has certain standard requirements. The GPON standard is small Small Form-Factor Pluggable (SFP), the standard of XGPON is SFP+, and the optical module size of these two standards is the same. If the overall length of the optical component cannot be controlled, the final module size cannot be controlled and cannot meet the standard requirements.

For this reason, the embodiments of the present application provide an optical transceiver assembly (BOSA), so that the overall size of the optical transceiver assembly can be made smaller.

Referring to FIG. 6, an embodiment of the present application provides an optical transceiver component, including:

The second housing 1, the second housing 1 is provided with a light transmission channel 11 (including 11a and 11b), the light transmission channel 11 is provided with a second multiplexing structure 2, and the second housing 1 is provided with a light transmission channel 11 The optical receiving port, the optical transmitting port, and the optical fiber connection port 12 are connected by the channel 11. The optical transmission channel 11 includes a first optical channel 11a connected between the optical transmitting port and the optical fiber connecting port 12, and connected to the optical receiving port and the first optical channel 11a. The second optical channel 11b between the optical channels 11a, the second multiplexing structure 2 is arranged at the junction of the first optical channel 11a and the second optical channel 11b.

The optical receiving component (ROSA) 3 is packaged at the optical receiving port;

The optical transmitting component (TOSA) 4 is encapsulated at the optical transmitting port;

The second multiplexing structure 2 can transmit the optical signal of the first wavelength and the optical signal of the second wavelength emitted by the optical transmitting component 3 to the optical fiber connection port 12, and can make the optical signal of the third wavelength and the optical signal of the third wavelength entered by the optical fiber connection port 12 The optical signal of the fourth wavelength is reflected to the optical receiving port.

Specifically, the light emitted by the optical transmitting component 4 is transmitted linearly when passing through the second multiplexing structure 2, and then enters the optical fiber connection port 12 for transmission; the optical signal from the optical fiber connection port 12 is reflected when passing through the second multiplexing structure 2, and the light The receiving component 3 is just on the reflective optical path, so as to realize the reception of optical signals. Among them, the optical receiving component 3 encapsulates the two receiving components inside the same coaxial tube case, and a splitter is arranged inside the coaxial tube case to realize the demultiplexed reception of the upstream optical signal; similarly, the optical transmitting component 4 is to encapsulate the two transmitting components inside the same coaxial tube case, and a multiplexer is arranged inside the coaxial tube case to realize the multiplex transmission of the downstream optical signal.

In order to reduce the impact of reflected light in the network on the performance of the light emitting component 4, an isolator 5 may be provided in the optical transmission channel 11 between the light emitting component 4 and the second multiplexing structure 2.

In order to filter the stray light that enters the light receiving component 3 and reduce the influence of stray light on the receiving performance of the light receiving component 3, 0 degree can be set in the optical transmission channel 11 between the light receiving component 3 and the second multiplexing structure 2 Filter 6.

The following further describes the specific implementation of the light emitting assembly (TOSA):

Referring to FIG. 7, an embodiment of the present application provides a light emitting assembly (TOSA), and the light emitting assembly 70 includes:

The first light emitter 71, the second light emitter 72, the reflection structure 73, the first multiplexing structure 74, the integrated optical transmission component 75 and the packaging assembly 76. Among them, the integrated light transmission component 75 is provided with a first lens portion 751, a second lens portion 752, a first fixing portion 753 for placing the reflection structure 73, and a second fixing portion for placing the first multiplexing structure 74 754. A light outlet 761 is provided on the packaging component 76.

The first optical transmitter 71 is used to generate a first optical signal of a first wavelength, the second optical transmitter 72 is used to generate a second optical signal of a second wavelength, and the first lens portion 751 is used to transmit the signal from the first optical transmitter. 71 is coupled to the reflection structure 73, the second lens part 752 is used to couple the second optical signal from the second optical transmitter 72 to the first multiplexing structure 74, the first multiplexing structure 74 is used to The first optical signal reflected by the reflective structure 73 and the second optical signal transmitted by the second lens part 752 are combined and output to the light exit 761.

The optical paths of the first optical signal and the second optical signal are shown by the dashed lines in FIG. 7, where the first light emitter 71 and the first reflective structure 73 are arranged on the transmission light path of the first lens portion 751, and the second light emitting The filter 72 and the first multiplexing structure 74 are disposed on the transmission light path of the second lens portion 752, and the first multiplexing structure 74 is disposed on the reflection light path of the reflection structure 73.

Specifically, the first lens portion 751 performs optical path collimation on the first optical signal emitted by the first transmitter 71, and guides the first optical signal after the optical path is collimated to the reflecting structure 73, and the reflecting structure 73 then directs the first optical signal to Reflected to the first multiplexing structure 74, the second lens part 752 performs optical path collimation on the second optical signal emitted by the second transmitter 72, and directs the second optical signal after the optical path collimation to the first multiplexing structure 74, The first multiplexing structure 74 is used to reflect the first optical signal and transmit the second optical signal.

It should be noted that the first lens portion 751 includes a first light-incident surface, which is an arc-shaped condensing surface provided on the integrated light transmission component 75, and the second lens portion 752 includes a second light-incident surface. The second light incident surface is an arc-shaped condensing surface provided on the integrated light transmission component 75; the first fixing portion 753 includes a first fixing surface 753a, and the reflective structure 73 may be arranged on the first fixing surface 753a In order to prevent the intensity of the light signal from attenuating during reflection, the reflective structure 73 can be a total reflection film or a total reflection film; the second fixing portion 754 includes a second fixing surface 754a, and the first multiplexing structure can It is a multiplexer film or a multiplexer arranged on the second fixed surface 754a; the first emitter 71 and the second emitter 72 can be arranged side by side, and the emission optical paths of the first light emitter 71 and the second light emitter 72 Parallel; Specifically, the first light emitter 71 and the second light emitter 72 can be laser diodes, which can convert electrical signals into optical signals of corresponding wavelengths for output.

Taking the transceiver wavelengths of GPON and XGPON as an example, the first wavelength can be 1490 nanometers and the second wavelength can be 1577 nanometers; or the first wavelength can be 1577 nanometers, and the second wavelength can be 1490 nanometers. Thus, GPON and XGPON optical signal transmission.

The integrated light transmission component 75 can be formed by high polymer die-casting or photolithography at one time. It is understandable that the integrated light transmission component 75 is made of light-transmitting material. For example, the material of the integrated light transmission component 75 can be Plastics, resins, etc. are not specifically limited here.

Optionally, one or more reflective structures can be fixed on the integrated optical transmission component 75, and the placement angle of the reflective structure and the relative positional relationship between the reflective structure and the first multiplexing structure can be changed in various ways. The optical transmission component 75 may have a variety of different structures, which will be introduced separately below in conjunction with specific embodiments:

Please refer to FIG. 8, which is a schematic diagram of an embodiment of fixing a reflective structure on the integrated optical transmission component 75. The angle between the first fixed surface 753a and the transmitted light path of the first lens portion 751 is 45 degrees, so the reflected light path of the reflective structure 73 is perpendicular to the transmitted light path of the first lens portion 751, and the second fixed surface 754a is The angle between the reflection light paths of the reflection structure 73 is 45 degrees. In addition, the integrated light transmission member 75 is also provided with a refractive surface 755, which is located between the first fixing portion 753 and the second fixing portion 754, specifically, the refractive surface 755 is arranged on the reflection light path of the reflection structure 73 And the angle between the refractive surface 755 and the reflective light path is 90 degrees, that is, the first light signal reflected by the reflective structure 73 is incident on the refractive surface 755 perpendicularly, and the light path does not change.

Referring to FIG. 9, the included angle between the first fixed surface 753a and the transmitted light path of the first lens portion 751 can also be other angles, such as 60 degrees as shown in FIG. 9, and the refractive surface 755 reflects the first reflection structure 73 An optical signal is refracted to the first multiplexing structure 74, so it is necessary to adjust the relative positional relationship between the first fixed surface 753a and the second fixed surface 754a and the transmission light path between the second fixed surface 754a and the second lens portion 752. The included angle makes the direction of the first optical signal reflected by the first multiplexing structure 74 consistent with the emission direction of the second optical signal.

10, the reflective structure 73 may specifically include a first reflective structure 73a and a second reflective structure 73b, the integrated optical transmission member 75 is further provided with a third fixing portion 756, wherein the first reflective structure 73a is disposed on the first fixing On the portion 753, the second reflective structure 73b is provided on the third fixing portion 756, the first reflective structure 73a is provided on the transmitted light path of the first lens portion 751, and the second reflective structure 74a is provided on the reflected light of the first reflective structure 73a. On the road, the refraction surface 755 is disposed on the reflection light path of the second reflection structure 74a, and the first multiplexing structure 74 is disposed on the refraction light path of the refraction surface 755. The optical paths of the first optical signal and the second optical signal are shown by the dashed lines in FIG. 11. The first optical signal is reflected by the first reflective structure 73a, reflected by the second reflective structure 73b, and refracted by the refraction surface 755 before being guided to the first multiplexer. Structure 74, the first optical signal is reflected by the first multiplexing structure 74 and the transmission direction of the second optical signal is consistent. It is understandable that the embodiment shown in FIG. 11 only lists the case where the number of reflective structures is two and the number of refractive surfaces is one. In practical applications, more reflective structures and refractive surfaces can be provided. The specific number is this There are no restrictions.

The packaging structure of TOSA in the above-mentioned embodiment will be introduced below:

Please refer to FIG. 11 and FIG. 12. FIG. 11 is a front view of the TOSA package structure in an embodiment of the application, and FIG. 12 is a side view of the TOSA package structure in an embodiment of the application. As shown in FIG. 11, the package assembly 76 includes a base 762, a substrate 764 fixed on the base 762, a first housing 763 covered on the base, a first light emitter 71, a second light emitter 72, and The integrated light transmission member 75 is provided on the substrate. Specifically, as shown in FIG. 12, a substrate 764 is first mounted on the base 762. The substrate 764 may include an "L"-shaped structure on the bottom surface and the side surface. A certain metal circuit may be provided on the substrate 764. The first light emitter 71 and the second light emitter 72 are mounted on the bottom or side surface with a high-precision placement machine, and gold wire bonding is performed with the metal circuit, and then the integrated light transmission component 75 is fixed on the side surface of the substrate 764 After the above steps are completed, the entire device is hermetically packaged and covered with the first housing 763. The first optical signal and the second optical signal are processed by the integrated optical transmission component 75, the reflection structure 73, and the first multiplexing structure 74 and then output to the light exit 761.

The above-mentioned packaging structure may specifically adopt a coaxial package (Transistor-Outline can, TO CAN) packaging method, or may adopt other packaging methods such as a box type (BOX) packaging, which is not specifically limited here.

It should be noted that the integrated optical transmission component 75 can be coupled with the first light emitter 71 and the second light emitter 72 through a charge-coupled device (CCD) monitoring at the remote end. Specifically, The first light signal emitted by the first light emitter 71 is hit to the CCD through the integrated light transmission part 75 to form a light spot 1, and the second light signal emitted by the second light emitter 72 is hit to the CCD through the integrated light transmission part 75 Spot 2 is formed on the upper surface, and the CCD monitors both the spot 1 and the spot 2. When the size and shape of the

spots

1 and 2 meet the requirements at the same time, the integrated optical transmission part 75 and the first light emitter 71 and the second light emitter 72 After the coupling is completed, the integrated optical transmission component 75, the first optical transmitter 71 and the second optical transmitter 72 are fixed.

The optical transceiver assembly in any of the above embodiments is electrically connected with the peripheral electronic assembly (ESA), and then installed in the optical module housing to form the optical module.

For example, the pins of the optical receiving component and the optical transmitting component in the optical transceiver component shown in FIG. 6 are electrically connected with the peripheral electronic component (ESA), and then installed in the optical module housing to form an optical module.

Connecting the above-mentioned optical module to a single board and placing it in the frame constitutes an optical network device. The optical network device can be an OLT, an ONU, or an optical transport network (OTN). The optical transmission equipment in, the specifics are not limited here.

As mentioned above, the above embodiments are only used to illustrate the technical solutions of the present application, not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, a person of ordinary skill in the art should understand that: The technical solutions recorded in the embodiments are modified, or some of the technical features are equivalently replaced; these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

A light emitting component TOSA is characterized in that it comprises:

A first optical transmitter for generating a first optical signal of a first wavelength;

A second optical transmitter for generating a second optical signal with a second wavelength;

Reflective structure

The first multiplex structure;

An integrated optical transmission component, the integrated optical transmission component is provided with a first lens portion, a second lens portion, a first fixing portion for placing the reflection structure, and a first multiplexing structure The second fixing part, the reflection structure is disposed on the transmission light path of the first lens part, the first multiplexing structure is disposed on the reflection light path of the reflection structure, and the first multiplexing structure is disposed on the The transmission light path of the second lens part;

The package assembly, the package assembly is provided with a light outlet, the first light emitter, the second light emitter, the reflective structure, the first multiplexing structure, and the integrated optical transmission component are Packaged inside the package assembly, and the first light emitter is arranged on the transmission light path of the first lens part, and the second light emitter is arranged on the transmission light path of the second lens part;

The first lens part is used to couple a first optical signal from the first light emitter to the reflection structure, and the reflection structure reflects the first optical signal to the first multiplexing structure ；

The second lens part is used to couple the second optical signal from the second optical transmitter to the first multiplexing structure;

The first multiplexing structure is used for multiplexing the first optical signal reflected by the reflective structure and the second optical signal transmitted by the second lens portion, and output to the light exit.
The TOSA according to claim 1, wherein the first lens portion comprises a first light-incident surface, and the first light-incident surface is an arc-shaped condensing surface provided on the integrated light transmission component The second lens portion includes a second light-incident surface, and the second light-incident surface is an arc-shaped condensing surface provided on the integrated light transmission component.
The TOSA according to claim 1 or 2, wherein the first fixing portion comprises a first fixing surface, and the reflective structure is a reflective film provided on the first fixing surface, or the reflective The structure is a reflective sheet fixed on the first fixing surface.
The TOSA according to claim 3, wherein the angle between the first fixing surface and the transmitted light path of the first lens portion is 45 degrees.
The TOSA according to any one of claims 1 to 4, wherein the second fixing portion comprises a second fixing surface, and the first multiplexing structure is a combination arranged on the second fixing surface. The wave film, or, the first multiplexing structure is a multiplexer fixed on the second fixed surface.
The TOSA according to claim 5, wherein the angle between the second fixing surface and the reflected light path is 45 degrees.
The TOSA according to any one of claims 1 to 6, wherein the integrated optical transmission component is further provided with a refractive surface, and the refractive surface is located at the first fixing portion and the second fixing portion In between, the refraction surface is disposed on the reflection light path, and the refraction surface is used to refract the first light signal reflected by the reflection structure to the first multiplexing structure.
The TOSA according to any one of claims 1 to 7, wherein the material of the integrated light transmission component is plastic or resin.
The TOSA according to any one of claims 1 to 8, wherein the first multiplexing structure is specifically configured to reflect the first optical signal and transmit the second optical signal.
The TOSA according to any one of claims 1 to 9, wherein the packaging component includes a base, a substrate fixed on the base, and a first housing covered on the base, the The first light emitter, the second light emitter, and the integrated light transmission component are arranged on the substrate.
The TOSA according to any one of claims 1 to 10, wherein the first light emitter and the second light emitter are arranged side by side, and the first light emitter and the second light emitter The emission paths of the light emitters are parallel.
The TOSA according to any one of claims 1 to 11, wherein the first wavelength is 1490 nanometers, and the second wavelength is 1577 nanometers;

or,

The first wavelength is 1577 nanometers, and the second wavelength is 1490 nanometers.
The TOSA according to any one of claims 1 to 11, wherein the first light emitter and the second light emitter are laser diodes.
An optical transceiver component BOSA, which is characterized by comprising: the TOSA according to any one of claims 1 to 13, a second housing, a light receiving component ROSA, and a second multiplexing structure, and the second housing An optical transmission channel is provided, the second multiplexer is arranged in the optical transmission channel, and the second housing is provided with an optical receiving port, an optical sending port, and an optical fiber connection port communicating with the optical transmission channel ；

The TOSA is encapsulated in the optical transmitting port, and the ROSA is encapsulated in the optical receiving port;

The second multiplexer is used to transmit the first optical signal and the second optical signal from the TOSA to the optical fiber connection port, and reflect the third optical signal from the optical fiber connection port to the ROSA.
The optical transceiver assembly of claim 14, wherein the optical transmission channel comprises a first optical channel connected between the optical transmitting port and the optical fiber connection port, and a first optical channel connected to the optical receiving port And the second optical channel between the first optical channel, and the second multiplexing structure is disposed at the junction of the first optical channel and the second optical channel.
An optical module, characterized by comprising the TOSA according to any one of claims 1 to 13, or comprising the BOSA according to claim 14 or 15.
An optical network device, characterized by comprising the optical module of claim 16.
The optical network equipment according to claim 17, wherein the optical network equipment comprises an optical line terminal OLT or an optical network unit ONU.