Optical module
By designing the light receiving component with the first filter and the angle sensitive filter in the optical module, the autonomously tuneable wavelength function of the light receiving component is realized, which solves the problem that the existing optical module cannot handle optical signals at different wavelengths and improves the performance of the optical module.
Patent Information
- Application Number
- CN202311566297.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-11-22
- Publication Date
- 2025-05-23
AI Technical Summary
The optical receiving components in the existing optical module cannot independently tune the wavelength, resulting in the inability to effectively process optical signals of different wavelengths in high-speed information transmission and reception systems.
An optical module is designed, including a first light receiving component and a second light receiving component. The first light receiving component realizes reflection and tuning of the received light beam through the first filter and the angle sensitive filter, and the second light receiving component converts the tuned optical signal into an electrical signal.
The optical receiving component is automatically tuneable wavelength function, which can effectively process optical signals of different wavelengths, and improves the performance of optical modules in high-speed information transmission and reception systems.
Smart Images
Figure CN120028921A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of communication technology, and in particular to an optical module. Background Art
[0002] With the development of new services and application models such as cloud computing, mobile Internet, and video, the development and progress of optical communication technology has become increasingly important. In optical communication technology, optical modules are tools for realizing the mutual conversion of optical and electrical signals. They are one of the key components in optical communication equipment, and the transmission rate of optical modules is constantly increasing with the development of optical communication technology. In high-speed information transceiver systems, high-density optical modules need to be used to replace traditional optical modules. Multi-channel optical transceiver technology can concentrate more transmitters and receivers in a smaller space. In such a high-speed transceiver module, the core component is the BOSA (Bi-Directional Optical Sub-Assembly) structure in the optical module.
[0003] The commonly used BOSA structure includes a tube body, a light emitting component, a light receiving component and a fiber optic adapter. The light emitting component is arranged on one side of the tube body, the fiber optic adapter is arranged on the other side of the tube shell, and the light receiving component is arranged on the third side of the tube body. A filter is arranged in the tube body. The light beam emitted by the light emitting component is coupled to the fiber optic adapter through the filter, and the light beam transmitted through the fiber optic adapter enters the light receiving component after being reflected by the filter.
[0004] The light that normally enters the photodetector in the light receiving component is basically received by a wide-spectrum light source, that is, the receiving end does not distinguish between wavelengths or can only receive wavelengths in one band, and the received wavelength cannot be tuned or transformed. Summary of the invention
[0005] The present application provides an optical module, so that the wavelength of an optical receiving component can be autonomously tuned.
[0006] In order to solve the above technical problems, the embodiments of the present application disclose the following technical solutions:
[0007] In a first aspect, an embodiment of the present application discloses an optical module, including:
[0008] Upper shell;
[0009] A lower shell body, which is covered with the upper shell body to form a cavity;
[0010] A circuit board is located in the cavity;
[0011] an optical fiber adapter, located in the cavity;
[0012] An optical transceiver assembly, located in the cavity and electrically connected to the circuit board, includes:
[0013] A first tube shell, in which a first filter and an angle-sensitive filter are arranged;
[0014] a first light emitting component, wherein the first light emitting component and the optical fiber adapter are respectively located at opposite sides of the first tube shell;
[0015] A first light receiving component, located at one side of the first tube shell;
[0016] a second light receiving component, located at the opposite side of the first light receiving component, and the second light receiving component converts the received optical signal into an electrical signal;
[0017] After being reflected by the first filter, the received light beam is reflected by the first light receiving component to the angle sensitive filter, and then enters the second light receiving component;
[0018] The wavelength of the received light beam includes: one or both of a first wavelength and a second wavelength;
[0019] At a first moment, the target wavelength is a first wavelength, and the angle between the received light beam reflected by the first light receiving component and the normal of the angle sensitive filter is a first reflection angle;
[0020] At the second moment, the target wavelength is the second wavelength, and the angle between the received light beam reflected by the first light receiving component and the normal of the angle sensitive filter is the second reflection angle;
[0021] The angle-sensitive filter allows light of different wavelengths to pass through at different incident angles.
[0022] In a second aspect, an embodiment of the present application discloses an optical module, including: an upper housing;
[0023] A lower shell body, which is covered with the upper shell body to form a cavity;
[0024] A circuit board is located in the cavity;
[0025] an optical fiber adapter, located in the cavity;
[0026] An optical transceiver assembly, located in the cavity and electrically connected to the circuit board, includes:
[0027] A first tube shell, in which a first filter, an angle-sensitive filter, and a first collimating lens are arranged;
[0028] A first light emitting component, wherein the first light emitting component and the optical fiber adapter are respectively located at opposite sides of the first tube shell; the first collimating lens is located at a light outlet of the optical fiber adapter;
[0029] A first light receiving component is located at one side of the first tube shell, and reflects the receiving light beam reflected by the first filter at different angles according to different wavelengths;
[0030] The second light receiving component is located at the opposite side of the first light receiving component. The receiving light beam reflected by the first light receiving component enters the second light receiving component after passing through the angle sensitive filter.
[0031] Compared with the prior art, the present invention has the following advantages:
[0032] The present application provides an optical module, including: a cavity formed by the lower shell and the upper shell covering each other, and a circuit board, an optical fiber adapter and an optical transceiver assembly located inside the cavity. Among them, the optical transceiver assembly includes: a first tube shell, a first light emitting component, a first light receiving component and a second light receiving component. A first filter and an angle-sensitive filter are arranged in the first tube shell. The receiving light beam from the optical fiber adapter is reflected by the first filter, and the reflected receiving light beam enters the first light receiving component. After being reflected by the first light receiving component, the receiving light beam enters the second light receiving component through the angle-sensitive filter. The first light receiving component reflects the receiving light beam reflected by the first filter at different angles according to different wavelengths; the angle-sensitive filter allows light of different wavelengths to pass through at different incident angles. The present application adjusts the reflection angle of light of different wavelengths by the first light receiving component, and then filters out light that does not conform to the angle through the angle-sensitive filter, so as to realize the tunability of the receiving channel. BRIEF DESCRIPTION OF THE DRAWINGS
[0033] In order to more clearly illustrate the technical solutions in the present disclosure, the following briefly introduces the drawings required to be used in some embodiments of the present disclosure. Obviously, the drawings described below are only drawings of some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can also be obtained based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams, and are not limitations on the actual size of the product involved in the embodiments of the present disclosure, the actual process of the method, the actual timing of the signal, etc.
[0034] Figure 1 A partial architecture diagram of an optical communication system provided according to some embodiments of the present disclosure;
[0035] Figure 2 A partial structural diagram of a host computer provided according to some embodiments of the present disclosure;
[0036] Figure 3 A structural diagram of an optical module provided according to some embodiments of the present disclosure;
[0037] Figure 4 An exploded view of an optical module provided according to some embodiments of the present disclosure;
[0038] Figure 5 A schematic diagram of the structure of an optical transceiver component in an optical module provided in an embodiment of the present application;
[0039] Figure 6 An exploded schematic diagram of an optical transceiver component in an optical module provided in an embodiment of the present application;
[0040] Figure 7 A cross-sectional view of an optical transceiver assembly in an optical module provided according to an embodiment of the present application Figure 1 ;
[0041] Figure 8 A cross-sectional view of an optical transceiver assembly in an optical module provided according to an embodiment of the present application Figure 2 ;
[0042] Fig. 9 A partial cross-sectional view of an optical transceiver component in an optical module provided according to an embodiment of the present application Figure 1 ;
[0043] Fig.10 A partial cross-sectional view of an optical transceiver assembly provided according to some embodiments Figure 2 ;
[0044] Fig.11 A schematic diagram of the structure of a first light receiving component provided according to some embodiments of the present application;
[0045] Fig.12 It is a cross-sectional schematic diagram of a first light receiving component provided according to some embodiments of the present application. DETAILED DESCRIPTION
[0046] Some embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings. However, the described embodiments are only a part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments provided by the present disclosure, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present disclosure.
[0047] Unless the context requires otherwise, throughout the specification and claims, the term "including" is interpreted as open and inclusive, that is, "including, but not limited to"; the terms "first" and "second" cannot be understood to indicate or imply relative importance or indicate an upper limit of quantity; the term "plurality" means two or more; the term "connection" should be understood in a broad sense, for example, "connection" can be a fixed connection, a detachable connection, or an integral connection, and can be directly connected or indirectly connected through an intermediate medium; the use of the terms "suitable for" or "configured to" means open and inclusive language, which does not exclude devices that are suitable for or configured to perform additional tasks or steps; the terms "parallel", "vertical", "same", "consistent", "level" and other descriptions are not limited to absolute mathematical theoretical relationships, but also include acceptable error ranges generated in practice, and also include differences based on the same design concept but due to manufacturing reasons. In the absence of more restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the circuit structure, article or device including the elements.
[0048] Optical communication technology establishes information transmission between information processing devices. Optical communication technology loads information onto light and uses the propagation of light to achieve information transmission. Light loaded with information is an optical signal. When optical signals propagate in information transmission equipment, they can reduce the loss of optical power and achieve high-speed, long-distance, and low-cost information transmission. Information that can be processed by information processing equipment exists in the form of electrical signals. Optical network terminals / gateways, routers, switches, mobile phones, computers, servers, tablets, and televisions are common information processing devices, and optical fibers and optical waveguides are common information transmission equipment.
[0049] The mutual conversion of optical signals and electrical signals between information processing equipment and information transmission equipment is realized through optical modules. For example, an optical fiber is connected to the optical signal input end and / or the optical signal output end of the optical module, and an optical network terminal is connected to the electrical signal input end and / or the electrical signal output end of the optical module; the first optical signal from the optical fiber is transmitted into the optical module, the optical module converts the first optical signal into a first electrical signal, and the optical module transmits the first electrical signal into the optical network terminal; the second electrical signal from the optical network terminal is transmitted into the optical module, the optical module converts the second electrical signal into a second optical signal, and the optical module transmits the second optical signal into the optical fiber. Since information processing devices can be connected to each other through an electrical signal network, at least one type of information processing device needs to be directly connected to the optical module, and it is not necessary for all types of information processing devices to be directly connected to the optical module. The information processing device directly connected to the optical module is called the host computer of the optical module.
[0050] Figure 1 FIG. 1 is a partial architecture diagram of an optical communication system provided according to some embodiments of the present disclosure. Figure 1 As shown, the optical communication system is partially presented as a remote information processing device 1000 , a local information processing device 2000 , a host computer 100 , an optical module 200 , an optical fiber 101 and a network cable 103 .
[0051] One end of the optical fiber 101 extends toward the remote information processing device 1000, and the other end is connected to the optical interface of the optical module 200. The optical signal can be totally reflected in the optical fiber 101, and the propagation of the optical signal in the direction of total reflection can almost maintain the original optical power. The optical signal is totally reflected multiple times in the optical fiber 101, and the optical signal from the direction of the remote information processing device 1000 is transmitted into the optical module 200, or the light from the optical module 200 is propagated toward the remote information processing device 1000, so as to realize long-distance and low-power-loss information transmission.
[0052] The number of optical fibers 101 may be one or more (two or more); the optical fiber 101 and the optical module 200 may be connected in a pluggable movable manner or in a fixed manner.
[0053] The host computer 100 has an optical module interface 102, which is configured to access the optical module 200, so that the host computer 100 establishes a unidirectional / bidirectional electrical signal connection with the optical module 200; the host computer 100 is configured to provide data signals to the optical module 200, or receive data signals from the optical module 200, or monitor and control the working status of the optical module 200.
[0054] The host computer 100 has an external electrical interface, such as a Universal Serial Bus (USB) interface and a network cable interface 104, which can be connected to an electrical signal network. For example, the network cable interface 104 is configured to connect to the network cable 103, so that the host computer 100 and the network cable 103 establish a unidirectional / bidirectional electrical signal connection.
[0055] Optical Network Unit (ONU), Optical Line Terminal (OLT), Optical Network Equipment (ONT) and Data Center Server are common host computers.
[0056] One end of the network cable 103 is connected to the local information processing device 2000 , and the other end is connected to the host computer 100 . The network cable 103 establishes an electrical signal connection between the local information processing device 2000 and the host computer 100 .
[0057] For example, the third electrical signal emitted by the local information processing device 2000 is transmitted to the host computer 100 through the network cable 103. The host computer 100 generates a second electrical signal based on the third electrical signal. The second electrical signal from the host computer 100 is transmitted to the optical module 200. The optical module 200 converts the second electrical signal into a second optical signal. The optical module 200 transmits the second optical signal into the optical fiber 101. The second optical signal is transmitted to the remote information processing device 1000 in the optical fiber 101.
[0058] For example, a first optical signal from the direction of a remote information processing device 1000 propagates through the optical fiber 101, the first optical signal from the optical fiber 101 is transmitted into the optical module 200, the optical module 200 converts the first optical signal into a first electrical signal, the optical module 200 transmits the first electrical signal into the host computer 100, the host computer 100 generates a fourth electrical signal based on the first electrical signal, and the host computer 100 transmits the fourth electrical signal to the local information processing device 2000.
[0059] The optical module is a tool for realizing the mutual conversion between optical signals and electrical signals. During the conversion process between optical signals and electrical signals, the information does not change, but the encoding and decoding method of the information can change.
[0060] Figure 2 1 is a partial structural diagram of a host computer provided according to some embodiments of the present disclosure. In order to clearly show the connection relationship between the optical module 200 and the host computer 100, Figure 2 Only the structures related to the host computer 100 and the optical module 200 are shown. Figure 2 As shown, the host computer 100 also includes a PCB circuit board 105 arranged in the shell, a cage 106 arranged on the surface of the PCB circuit board 105, a heat sink 107 arranged on the cage 106, and an electrical connector (not shown in the figure) arranged inside the cage 106. The heat sink 107 has a protruding structure that increases the heat dissipation area, and the fin-shaped structure is a common protruding structure.
[0061] The optical module 200 is inserted into the cage 106 of the host computer 100, and the cage 106 fixes the optical module 200. The heat generated by the optical module 200 is transferred to the cage 106 and then diffused through the heat sink 107. After the optical module 200 is inserted into the cage 106, the electrical interface of the optical module 200 is connected to the electrical connector inside the cage 106.
[0062] Figure 3 is a structural diagram of an optical module provided according to some embodiments of the present disclosure, Figure 4 FIG. 1 is an exploded view of an optical module provided according to some embodiments of the present disclosure. Figure 3 and Figure 4As shown, the optical module 200 includes a housing, a circuit board 300 disposed in the housing, a light emitting component and a light receiving component. However, the present disclosure is not limited thereto. In some embodiments, the optical module 200 includes one of the light emitting component and the light receiving component.
[0063] The housing comprises an upper housing 201 and a lower housing 202 . The upper housing 201 covers the lower housing 202 to form the housing having two openings 204 and 205 . The outer contour of the housing is generally a square body.
[0064] In some embodiments, the lower shell 202 includes a bottom plate 2021 and two lower side plates 2022 located on both sides of the bottom plate 2021 and arranged perpendicular to the bottom plate 2021; the upper shell 201 includes a cover plate 2011, and the cover plate 2011 covers the two lower side plates 2022 of the lower shell 202 to form the above-mentioned shell.
[0065] In some embodiments, the lower shell 202 includes a bottom plate 2021 and two lower side plates 2022 located on both sides of the bottom plate 2021 and vertically arranged with the bottom plate 2021; the upper shell 201 includes a cover plate 2011 and two upper side plates located on both sides of the cover plate 2011 and vertically arranged with the cover plate 2011, and the two upper side plates are combined with the two lower side plates 2022 to realize that the upper shell 201 covers the lower shell 202.
[0066] The direction of the line connecting the two openings 204 and 205 may be consistent with the length direction of the optical module 200, or may be inconsistent with the length direction of the optical module 200. For example, the opening 204 is located at the end of the optical module 200 ( Figure 3 The opening 205 is also located at the end of the optical module 200 ( Figure 3 Alternatively, the opening 204 is located at the end of the optical module 200, and the opening 205 is located at the side of the optical module 200. The opening 204 is an electrical interface, and the gold finger of the circuit board 300 extends from the electrical interface and is inserted into the electrical connector of the host computer; the opening 205 is an optical port, which is configured to access the optical fiber 101 so that the optical fiber 101 is connected to the optical emitting component and / or the optical receiving component in the optical module 200.
[0067] The assembly method of combining the upper shell 201 and the lower shell 202 is adopted, so that the components such as the circuit board 300, the light emitting component, and the light receiving component can be easily installed in the above shell, and the upper shell 201 and the lower shell 202 can encapsulate and protect the shapes of these components. In addition, when assembling the components such as the circuit board 300, the light emitting component and the light receiving component, it is convenient to deploy the positioning components, heat dissipation components, and electromagnetic shielding components of these components, which is conducive to the automated production.
[0068] In some embodiments, the upper shell 201 and the lower shell 202 are made of metal materials to facilitate electromagnetic shielding and heat dissipation.
[0069] In some embodiments, the optical module 200 further includes an unlocking component 600 located outside its housing. The unlocking component 600 is configured to achieve a fixed connection between the optical module 200 and the host computer, or to release the fixed connection between the optical module 200 and the host computer.
[0070] For example, the unlocking component 600 is located on the outside of the two lower side plates 2022 of the lower housing 202, and includes a snap-fit component that matches the cage 106 of the host computer. When the optical module 200 is inserted into the cage 106, the snap-fit component of the unlocking component 600 fixes the optical module 200 in the cage 106; when the unlocking component 600 is pulled, the snap-fit component of the unlocking component 600 moves accordingly, thereby changing the connection relationship between the snap-fit component and the host computer, so as to release the snap-fit fixed connection between the optical module 200 and the host computer, so that the optical module 200 can be pulled out of the cage 106.
[0071] The circuit board 300 includes circuit traces, electronic components and chips, etc. The electronic components and chips are connected together according to the circuit design through the circuit traces to realize the functions of power supply, electrical signal transmission and grounding. The electronic components may include capacitors, resistors, triodes, metal-oxide-semiconductor field-effect transistors (MOSFET), etc. The chips may include microcontroller units (MCU), laser driver chips, transimpedance amplifiers (TIA), limiting amplifiers, clock and data recovery chips (CDR), power management chips, and digital signal processing (DSP) chips.
[0072] The circuit board 300 is generally a rigid circuit board. Due to its relatively hard material, the rigid circuit board can also realize the load-bearing function. For example, the rigid circuit board can stably carry the above-mentioned electronic components and chips; the rigid circuit board is also easy to insert into the electrical connector in the upper computer cage.
[0073] The circuit board 300 also includes a gold finger formed on the end surface thereof, and the gold finger is composed of a plurality of independent pins. The circuit board 300 is inserted into the cage 106, and the gold finger is connected to the electrical connector in the cage 106. The gold finger can be provided on the surface of only one side of the circuit board 300 (for example, Figure 4The gold finger is configured to establish an electrical connection with the host computer to achieve power supply, grounding, I2C signal transmission, data signal transmission, etc.
[0074] Of course, flexible circuit boards are also used in some optical modules. Flexible circuit boards are generally used in conjunction with rigid circuit boards to supplement rigid circuit boards.
[0075] The light emitting component and / or the light receiving component are located on a side of the circuit board 300 away from the gold finger; in some embodiments, the light emitting component and the light receiving component are physically separated from the circuit board 300, and then electrically connected to the circuit board 300 through corresponding flexible circuit boards or electrical connectors; in some embodiments, the light emitting component and / or the light receiving component can be directly set on the circuit board 300, can be set on the surface of the circuit board, and can also be set on the side of the circuit board.
[0076] Figure 5 This is a structural diagram of an optical transceiver component in an optical module provided in an embodiment of the present application. Figure 6 This is a schematic diagram of an exploded view of an optical transceiver component in an optical module provided in an embodiment of the present application. Figure 5 , Figure 6 As shown, the optical module provided in the embodiment of the present application includes an optical transceiver assembly 400, which may include a first tube shell 410, an optical emitting component and an optical receiving component, and the first tube shell 410 includes an incident light port, an integrated transceiver light port and a receiving light port. Among them, the optical emitting component is connected to the first tube shell 410 through the incident light port, the optical receiving component is connected to the first tube shell 410 through the receiving light port, and the optical fiber adapter 700 is connected to the first tube shell 410 through the integrated transceiver light port. The optical fiber adapter 700 can be used as a connector of an optical fiber, allowing the optical fiber to be connected by an optical interface. In this way, the light beam emitted by the optical emitting component is injected into the first tube shell 410 through the incident light port, and the emitted light beam is then coupled to the optical fiber adapter 700 through the first tube shell 410 through the integrated transceiver light port, thereby realizing the emission of light. The received light beam transmitted by the optical fiber adapter 700 is injected into the first tube shell 410 through the integrated transceiver light port, and the received light beam is then transmitted to the optical receiving component through the first tube shell 410 through the receiving light port, thereby realizing the reception of light.
[0077] In some embodiments, the optical transceiver assembly 400 may include only one optical emitting component and one optical receiving component, the first tube shell 410 may include only one incident light port, one integrated transceiver optical port and one receiving light port, an optical emitting component is connected to the first tube shell 410 through the incident light port, an optical receiving component is connected to the first tube shell 410 through the receiving light port, and the optical fiber adapter 700 is connected to the first tube shell 410 through the integrated transceiver optical port, so that one-way optical emission and one-way optical reception of the optical transceiver assembly 400 can be achieved.
[0078] In some embodiments, the optical transceiver assembly 400 may also include two optical emitting components and two optical receiving components, the first tube shell 410 includes two incident light ports, two receiving light ports and one transceiver-integrated light port, that is, the optical transceiver assembly 400 includes a first optical emitting component, a second optical emitting component, a first light receiving component and a second light receiving component, the first tube shell 410 includes a first incident light port, a second incident light port, a first receiving light port, a second receiving light port and a transceiver-integrated light port, the first light emitting component 420 is connected to the first tube shell 410 through the first incident light port, the second light emitting component is connected to the first tube shell 410 through the second incident light port, the first light receiving component 430 is connected to the first tube shell 410 through the first receiving light port, the second light receiving component 440 is connected to the first tube shell 410 through the second receiving light port, and the optical fiber adapter 700 is connected to the first tube shell 410 through the transceiver-integrated light port.
[0079] like Figure 6 In some embodiments, the optical transceiver assembly 400 includes: a light emitting component and two light receiving components, the first tube shell 410 includes an incident light port, two receiving light ports and a transceiver integrated light port, that is, the optical transceiver assembly 400 includes a first light emitting component 420, a first light receiving component 430 and a second light receiving component 440, and the first tube shell 410 includes a first incident light port 411, a first receiving light port 412, a second receiving light port 413 and a transceiver integrated light port 414. The first light emitting component 420 is connected to the first tube shell 410 through the first incident light port 411, the first light receiving component 430 is connected to the first tube shell 410 through the first receiving light port 412, the second light receiving component 440 is connected to the first tube shell 410 through the second receiving light port 413, and the optical fiber adapter 700 is connected to the first tube shell 410 through the transceiver integrated light port 414.
[0080] A first collimating lens 450 , a first filter 460 , and an angle-sensitive filter 470 are disposed in the first tube shell 410 .
[0081] The first incident light port is located on the right side of the first tube shell 410, the transceiver integrated light port 414 is located on the left side of the first tube shell 410, the first receiving light port 412 is located on the lower side of the first tube shell 410, and the second receiving light port 413 is located on the upper side of the first tube shell 410. That is, the first incident light port is arranged opposite to the transceiver integrated light port 414, and the first receiving light port is arranged opposite to the second receiving light port.
[0082] Since the emission direction of the light beam emitted by the first light emitting component 420 is in the same direction as the light beam receiving direction of the optical fiber adapter 700, that is, the emission direction of the first light emitting component 420 is parallel to the circuit board 300, and the light receiving direction of the optical fiber adapter 700 is also parallel to the circuit board 300, the light beam emitted by the first light emitting component 420 is emitted into the first tube shell 410 through the first incident light port, and the emitted light beam is directly coupled to the optical fiber adapter 700 through the first tube shell 410, thereby realizing the emission of one path of light.
[0083] In some embodiments, a coupling lens is provided at the light output end of the first light emitting component 420 , and the laser beam emitted by the laser in the first light emitting component 420 is converted into a collimated beam via the coupling lens, and the collimated beam is emitted into the first tube shell 410 via the first incident light port.
[0084] Figure 7 A cross-sectional view of an optical transceiver assembly in an optical module provided according to an embodiment of the present application Figure 1 . Figure 7 The direction indicated by the middle arrow is the optical path of the signal light emitted by the optical emitting component. In some embodiments, the first emission light beam emitted by the first optical emitting component 420 is transmitted along the central axis direction of the transceiver integrated optical port 414, so that the first emission light beam passes through the first tube shell 410 and enters the optical fiber adapter 700. It should be noted that the central axis of the transceiver integrated optical port 414 refers to an axis passing through the center of the transceiver integrated optical port 414 and perpendicular to the surface where the transceiver integrated optical port 414 is located.
[0085] Figure 8 A cross-sectional view of an optical transceiver assembly in an optical module provided according to an embodiment of the present application Figure 2 . Fig. 9 A partial cross-sectional view of an optical transceiver component in an optical module provided according to an embodiment of the present application Figure 1 . Figure 8 The direction indicated by the arrow in the figure is the optical path of the signal light received by the optical receiving component. Figure 8 and Fig. 9 In some embodiments, the first light receiving port 412 is located on the lower side of the first tube shell 410 , and the central axis of the first light receiving port 412 is perpendicular to the central axis of the transceiver integrated light port 414 .
[0086] The first collimating lens 450 is inside the first tube shell 410, and collimates the receiving light beam of the optical fiber adapter 700. The collimated receiving light beam is reflected by the first filter 460, and the reflected receiving light beam enters the first light receiving component 430. After being reflected by the first light receiving component 430, the receiving light beam enters the second light receiving component 440 through the angle sensitive filter 470.
[0087] In some embodiments, the first optical filter 460 transmits the emission light beam of the first optical emission component 420 and reflects the reception light beam from the optical fiber adapter 700. The reception light beam reflected by the first optical filter 460 enters the first light receiving component 430.
[0088] The first light receiving component 430 is connected to the first tube shell 410 through the first light receiving port 412. The first light receiving component 430 is a MEMS TO, and a MEMS chip is arranged in the first light receiving component 430. The MEMS chip reflects the received light beam to the angle sensitive filter. The light beam reflected by the first light receiving component 430 is a parallel light beam.
[0089] In some embodiments, the MCU is electrically connected to the MEMS chip, and by controlling the voltage of the MEMS chip, the MEMS chip reflects light of different wavelengths at different angles. For the convenience of description, the angle between the normal of the light beam incident on the MEMS chip and the light window of the MEMS TO is defined as the first angle, and the angle between the light beam after being reflected by the MEMS chip and the normal of the light window of the MEMS TO is defined as the second angle. The voltage of the MEMS chip is different, so that the angle of the second angle is different.
[0090] For example, as shown in Table 1, the wavelength of the received light beam includes: a first wavelength, a second wavelength, a third wavelength and a fourth wavelength. Among them, when the target wavelength of the received light beam is the first wavelength (1598.89), the voltage of the corresponding MEMS chip is 0, and the angle between the direction of the received light beam after passing through the MEMS chip and the original reflection direction is 9.9°. When the target wavelength of the received light beam is the second wavelength (1598.04), the voltage of the corresponding MEMS chip is 5.3, and the angle between the direction of the received light beam after passing through the MEMS chip and the original reflection direction is 10.42°. When the target wavelength of the received light beam is the third wavelength (1597.19), the voltage of the corresponding MEMS chip is 7.2, and the angle between the direction of the received light beam after passing through the MEMS chip and the original reflection direction is 10.84°. When the target wavelength of the received light beam is the fourth wavelength (1596.34), the voltage of the corresponding MEMS chip is 8.4, and the angle between the direction of the received light beam after passing through the MEMS chip and the original reflection direction is 11.2°.
[0091] Wavelength (nm) Deflection Angle MEMS voltage 1596.34 11.2 8.4 1597.19 10.84 7.2 1598.04 10.42 5.3 1598.89 9.9 0
[0092] The MEMS chip reflects the received light beam to the angle-sensitive filter. The angle between the light beam reflected by the MEMS chip and the normal of the light window of the MEMS TO varies according to the wavelength. Therefore, the angle between the light beam reflected by the MEMS chip and the normal of the angle-sensitive filter is different.
[0093] In some embodiments, the wavelength of the received light beam includes one of a first wavelength, a second wavelength, a third wavelength and a fourth wavelength, and the received light beam reflected at a specific angle can pass through the angle-sensitive filter by setting the voltage of the MEMS chip.
[0094] Angle-sensitive filters allow light of different wavelengths to pass through at different angles, and not pass through at other angles. For ease of description, the angle between the light beam and the normal of the angle-sensitive filter is the third angle. When the third angle is the first angle, light of the first wavelength is allowed to pass through, and light of other wavelengths is reflected; when the third angle is the second angle, light of the second wavelength is allowed to pass through, and light of other wavelengths is reflected; when the third angle is the third angle, light of the third wavelength is allowed to pass through, and light of other wavelengths is reflected; when the third angle is the fourth angle, light of the fourth wavelength is allowed to pass through, and light of other wavelengths is reflected.
[0095] Fig.10 A partial cross-sectional view of an optical transceiver assembly provided according to some embodiments Figure 2 .like Fig.10 As shown, in some embodiments, the wavelength of the received light beam includes: a first wavelength, a second wavelength, a third wavelength, and a fourth wavelength. At the first moment, the target wavelength of the received light beam is the first wavelength, the voltage corresponding to the MEMS chip is the first voltage, and the angle between the received light beam and the normal of the angle-sensitive filter after being reflected by the MEMS chip is the first reflection angle. At the second moment, the target wavelength of the received light beam is the second wavelength, the voltage corresponding to the MEMS chip is the second voltage, and the angle between the received light beam and the normal of the angle-sensitive filter after being reflected by the MEMS chip is the second reflection angle. The first reflection angle a is different from the second reflection angle b.
[0096] In order to facilitate the installation of the angle-sensitive filter, a first mounting frame is provided in the first tube shell 410, the first mounting frame is located in the second receiving light port 413, and the angle-sensitive filter is mounted on the first mounting frame. The angle between the normal line of the angle-sensitive filter and the central axis of the transceiver integrated light port 414 is set according to the corresponding relationship between the angle-sensitive filter and the wavelength of the received light beam.
[0097] The second light receiving component is located at the second receiving light port 413, and the second light receiving component is tilted so that the second light receiving component receives the light transmitted by the angle sensitive filter. The included angle between the central axis of the second light receiving component and the central axis of the transceiver integrated light port 414 is not perpendicular. The second light receiving component converts the received optical signal into an electrical signal.
[0098] In the present application example, the central axis of the first light receiving component is the central normal line of the light window of the first light receiving component; the central axis of the second light receiving component is the central normal line of the light window of the second light receiving component.
[0099] In some examples, the angle between the normal line of the first optical filter and the central axis of the transceiver integrated optical port 414 may be 34°.
[0100] In some embodiments of the present application, in order to reduce light return loss and prevent light entering the second light receiving component from overflowing after reflection, the second light receiving component is provided with a second bracket, and the second bracket 441 is used to support the second filter 442, so that the normal of the second filter and the central axis of the second light receiving component have a certain angle. The second filter has a semi-transparent and semi-reflective characteristic, allowing the light beam from the angle-sensitive filter to pass through, while reflecting the light in the opposite direction.
[0101] In some embodiments of the present application, the angle between the normal line of the second filter and the central axis of the second light receiving component may be 2°, 3° or other values.
[0102] Fig.11 This is a schematic diagram of the structure of a first light receiving component provided according to some embodiments of the present application. Fig.12 FIG. 1 is a cross-sectional schematic diagram of a first light receiving component provided according to some embodiments of the present application. Fig.11 and Fig.12 As shown, the first light receiving component 430 includes: a tube base 431, a tube cap 432 and other components arranged in the tube base 431 and the tube cap 432. The tube cap 432 is covered at one end of the tube base 431. The tube base 431 includes a plurality of pins 433, which are used to realize the electrical connection between the circuit board and other electrical components in the first light receiving component, and finally realize the connection between other electrical components in the first light receiving component and the circuit board. This embodiment is only based on Fig.10 The structure shown is taken as an example.
[0103] The tube cap is buckled on the tube base 431 to form a light receiving space, and the MEMS chip 435 is arranged inside the light receiving space. The tube base 431 is used to support and carry the MEMS chip. The tube base 431 is provided with a plurality of through holes for fixing the tube pins 433.
[0104] The cap 432 is provided with a light window 434 so that the light beam enters the first light receiving component 430 through the light window, and the light beam reflected by the MEMS chip 435 is emitted through the light window.
[0105] The embodiment of the present application provides an optical transceiver assembly and an optical module, the optical transceiver assembly includes: a first tube shell, a first light emitting component, a first light receiving component and a second light receiving component, the first light emitting component 420 is connected to the first tube shell 410 through a first incident light port 411, the first light receiving component 430 is connected to the first tube shell 410 through a first receiving light port 412, the second light receiving component 440 is connected to the first tube shell 410 through a second receiving light port 413, and the optical fiber adapter 700 is connected to the first tube shell 410 through a transceiver integrated light port 414. The first collimating lens 450 is in the first tube shell 410, and collimates the received light beam of the optical fiber adapter 700. The collimated received light beam is reflected by the first filter 460, and the reflected received light beam enters the first light receiving component 430. After being reflected by the first light receiving component 430, the received light beam enters the second light receiving component 440 through the angle sensitive filter 470.
[0106] The first light receiving component 430 is a MEMS TO, and a MEMS chip is arranged inside the first light receiving component 430. The MEMS chip reflects the received light beam to the angle-sensitive filter. Channel switching is achieved by adjusting the angle of the reflector in the MEMS TO, and a high-sensitivity 10G APD TO form is adopted to realize a single-fiber bidirectional transmission function. The solution provided in the present application can realize channel switching without using a semiconductor refrigerator, reduce the power consumption of the original semiconductor refrigerator channel switching solution, and can greatly improve the tuning speed of the receiving channel, which can be increased from the S level to the 10ms level, and the tuning speed is greatly improved.
[0107] In some embodiments, the first light receiving port 412 may be located at the lower side of the first tube shell 410, the second light receiving component may be located at the second light receiving port 413, and the second light receiving component may be arranged obliquely so that the second light receiving component may receive the light transmitted by the angle sensitive filter. The angle between the central axis of the first receiving component and the central axis of the transceiver integrated light port 414 is not perpendicular, and the angle between the central axis of the second receiving component and the central axis of the transceiver integrated light port 414 is perpendicular.
[0108] Since the above embodiments are all described by citing and combining with other embodiments, different embodiments have the same parts, and the same and similar parts between the embodiments in this specification can be referred to each other. No further detailed description is given here.
Claims
1. An optical module, It is characterized in that include: Upper shell; A lower shell body, which is covered with the upper shell body to form a cavity; A circuit board is located in the cavity; an optical fiber adapter, located in the cavity; An optical transceiver assembly, located in the cavity and electrically connected to the circuit board, includes: A first tube shell, in which a first filter and an angle-sensitive filter are arranged; a first light emitting component, wherein the first light emitting component and the optical fiber adapter are respectively located at opposite sides of the first tube shell; A first light receiving component, located at one side of the first tube shell; a second light receiving component, located at the opposite side of the first light receiving component, and the second light receiving component converts the received optical signal into an electrical signal; After being reflected by the first filter, the received light beam is reflected by the first light receiving component to the angle sensitive filter, and then enters the second light receiving component; The wavelength of the received light beam includes: one or both of a first wavelength and a second wavelength; At a first moment, the target wavelength is a first wavelength, and the angle between the received light beam reflected by the first light receiving component and the normal of the angle sensitive filter is a first reflection angle; At the second moment, the target wavelength is the second wavelength, and the angle between the received light beam reflected by the first light receiving component and the normal of the angle sensitive filter is the second reflection angle; The angle-sensitive filter allows light of different wavelengths to pass through at different incident angles.
2. The optical module according to claim 1, It is characterized in that The first light receiving component includes a MEMS chip, MCU and the MEMS chip, the MCU controls the voltage of the MEMS chip so that the MEMS chip reflects a different angle to the received light beam.
3. The optical module according to claim 2, It is characterized in that The wavelengths of the received light beam include: a first wavelength, a second wavelength, a third wavelength and a fourth wavelength; Wherein, when the wavelength of the received light beam is the first wavelength, the voltage of the MEMS chip is 0V, and the deflection angle of the received light beam reflected by the MEMS chip is 9.9°; When the wavelength of the received light beam is the second wavelength, the voltage of the MEMS chip is 5.3 V, and the deflection angle of the received light beam reflected by the MEMS chip is 10.42°; When the wavelength of the received light beam is the first wavelength, the voltage of the MEMS chip is 7.2V, and the deflection angle of the received light beam reflected by the MEMS chip is 10.84°; when the wavelength of the received light beam is the first wavelength, the voltage of the MEMS chip is 8.4V, and the deflection angle of the received light beam reflected by the MEMS chip is 11.2°.
4. The optical module according to claim 1, It is characterized in that The first optical filter transmits the emission light beam from the first light emitting component, and reflects the reception light beam from the optical fiber adapter.
5. The optical module according to claim 1, It is characterized in that The first tube shell comprises: a first incident light port, wherein the first light emitting component is connected to the first tube shell through the first incident light port; a first light receiving port, through which the first light receiving component is connected to the first tube shell; a second light receiving port, through which the second light receiving component is connected to the first tube shell; and The optical fiber adapter is connected to the first tube shell through the optical transceiver integrated optical port.
6. The optical module according to claim 1, It is characterized in that The second light receiving component comprises: Second bracket; The second optical filter is supported by the second bracket so that the normal line of the second optical filter does not coincide with the normal line of the second light receiving component.
7. An optical module, It is characterized in that include: Upper shell; A lower shell body, which is covered with the upper shell body to form a cavity; A circuit board is located in the cavity; an optical fiber adapter, located in the cavity; An optical transceiver assembly, located in the cavity and electrically connected to the circuit board, includes: A first tube shell, in which a first filter, an angle-sensitive filter, and a first collimating lens are arranged; A first light emitting component, wherein the first light emitting component and the optical fiber adapter are respectively located at opposite sides of the first tube shell; the first collimating lens is located at a light outlet of the optical fiber adapter; A first light receiving component is located at one side of the first tube shell, and reflects the receiving light beam reflected by the first filter at different angles according to different wavelengths; The second light receiving component is located on the opposite side of the first light receiving component. After the received light beam is reflected by the first light receiving component, it enters the second light receiving component after passing through an angle-sensitive filter; the angle-sensitive filter allows light of different wavelengths to pass through at different incident angles.
8. The optical module according to claim 7, It is characterized in that The first light receiving component includes a MEMS chip, MCU and the MEMS chip, the MCU controls the voltage of the MEMS chip so that the MEMS chip reflects a different angle to the received light beam.
9. The optical module according to claim 8, It is characterized in that The wavelengths of the received light beam include: a first wavelength, a second wavelength, a third wavelength and a fourth wavelength; Wherein, when the wavelength of the received light beam is the first wavelength, the voltage of the MEMS chip is 0V, and the deflection angle of the received light beam reflected by the MEMS chip is 9.9°; When the wavelength of the received light beam is the second wavelength, the voltage of the MEMS chip is 5.3 V, and the deflection angle of the received light beam reflected by the MEMS chip is 10.42°; When the wavelength of the received light beam is the first wavelength, the voltage of the MEMS chip is 7.2V, and the deflection angle of the received light beam reflected by the MEMS chip is 10.84°; when the wavelength of the received light beam is the first wavelength, the voltage of the MEMS chip is 8.4V, and the deflection angle of the received light beam reflected by the MEMS chip is 11.2°.
10. The optical module according to claim 7, It is characterized in that The first optical filter transmits the emission light beam from the first light emitting component, and reflects the reception light beam from the optical fiber adapter.