Optical transceiver and optical line terminal

Abstract

The invention provides an optical transceiver and an optical line terminal, the optical transceiver comprises an optical transmitting module, an optical receiving module and a transmitting and receiving branching module, and the optical transmitting module comprises at least one transmitting device and a multiplexing assembly; the multiplexing assembly is used for combining and emitting the emission optical signals sent by the emission device; the optical receiving module comprises at least one receiving device and a demultiplexing component; the demultiplexing assembly is used for transmitting the incident light signals to the corresponding receiving devices in a branching manner; the transmit-receive shunt module is used for transmitting the emission optical signal emitted from the multiplexing assembly to the outside and transmitting the incident optical signal input from the outside to the de-multiplexing assembly. The optical line terminal comprises the optical transceiver. The optical path integration of the transmitting end and the receiving end is realized by adopting the multiplexing assembly and the de-multiplexing assembly respectively, and optical devices on a receiving and transmitting optical path are simplified, so that an optical signal coupling adjustment process can be reduced, multi-path different-wavelength receiving and transmitting are supported, and the manufacturing process is simpler.

Description

Technical Field

[0001] The embodiments of the present application relate to but are not limited to the field of communication technology, and in particular to an optical transceiver and an optical line terminal. Background Art

[0002] The Passive Optical Network (PON) system is mainly composed of the optical line terminal (OLT), the optical distribution network (ODN) and the optical network unit (ONU). In order to support the development of big video and cloud services, the PON system is also constantly upgrading from the Gigabit-capable Passive Optical Network (GPON) to the 10 Gigabit-capable Passive Optical Network (10G-PON, also known as XG-PON), and then to the 50 Gigabit-capable Passive Optical Network (50G-PON). In order to achieve a smooth upgrade of PON, multiple modes of PON need to coexist, for example, GPON, XG(S)-PON and 50G-PON coexist. Therefore, the optical transceiver on the OLT side needs to support the transmission and reception of multiple different wavelengths. For multi-mode optical transceivers, how to balance performance while reducing the difficulty of process manufacturing is the key technical problem to be solved at present. Summary of the invention

[0003] The embodiments of the present application provide an optical transceiver and an optical line terminal, which can support multi-channel transmission and reception of different wavelengths and have a simpler manufacturing process while taking into account performance.

[0004] In a first aspect, an embodiment of the present application provides an optical transceiver device, comprising:

[0005] An optical transmission module, the optical transmission module comprising at least one transmission device and a multiplexing component; each of the transmission devices is used to output a transmission optical signal of a preset wavelength; the multiplexing component is used to combine and transmit the transmission optical signals sent by all the transmission devices;

[0006] An optical receiving module, the optical receiving module comprising at least one receiving device and a demultiplexing component; the demultiplexing component is used to branch an incident optical signal and transmit it to a corresponding receiving device; the receiving device is used to receive the incident optical signal of a preset wavelength;

[0007] The transceiver splitter module is used to transmit the transmitted optical signal emitted from the multiplexing component to the outside, and to transmit the incident optical signal input from the outside to the demultiplexing component.

[0008] In a second aspect, an embodiment of the present application further provides an optical line terminal, comprising any optical transceiver device described in the first aspect.

[0009] The embodiments of the present application include: realizing the same optical port output of multiple transmitted optical signals through a multiplexing component, realizing the same optical port input of multiple incident optical signals through a demultiplexing component, and using the multiplexing component and the demultiplexing component to control the incident and output light angles is simpler and has lower requirements, and using the multiplexing component and the demultiplexing component to respectively realize the optical path integration of the transmitting end and the receiving end can simplify the optical devices required in the optical transmission and transmission paths, thereby reducing the optical signal coupling adjustment process. Therefore, compared with the related art, the embodiments of the present application can support multi-channel reception and transmission of different wavelengths and has a simpler manufacturing process while taking into account the performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a module schematic diagram of the optical transceiver device of the present application;

[0011] Figure 2 A schematic diagram of the structure of an embodiment of the first type of example of the optical transceiver of the present application;

[0012] Figure 3 A schematic structural diagram of another embodiment of the first type of example of the optical transceiver device of the present application;

[0013] Figure 4 A schematic diagram of the structure of an optical division multiplexing device in the first example of the optical transceiver device of the present application;

[0014] Figure 5 A schematic diagram of the structure of an embodiment of the second type of example of the optical transceiver of the present application;

[0015] Figure 6 A schematic diagram of the structure of an embodiment of the third example of the optical transceiver of the present application;

[0016] Figure 7 for Figure 6 A schematic diagram of the structure of the optical transmission module in the embodiment shown;

[0017] Figure 8 for Figure 6 A schematic diagram of the structure of the optical receiving module in the embodiment shown.

[0018] Reference numerals:

[0019] The optical transmission module 100, the transmission device 110, the transmission laser 111, the transmission lens 112, the backlight detector 113, the isolator 114, the first filter 120, the first optical substrate 130, the first heat sink 140, the third heat sink 150, the displacement prism 160, the multiplexing component 170, the demultiplexing component 180,

[0020] The optical receiving module 200, the receiving device 210, the second filter 220, the second optical substrate 230,

[0021] The transceiver splitter module 300, the first converging lens 310, the adapter 320, the optical division multiplexing device 330, the third filter 340, the first interface 351, the second interface 352, the third interface 353,

[0022] Reflection assembly 510, reflector 511, second converging lens 512, coaxial package receiver 520, receiving detection unit 550, receiving lens 560, transimpedance amplifier 570, second heat sink 580,

[0023] The encapsulation shell 610, the fourth light window 611, the light blocking plate 612, the first sub-encapsulation shell 620, the second sub-encapsulation shell 630, the third sub-encapsulation shell 640, the second light window 641, the fourth sub-encapsulation shell 650, the third light window 651,

[0024] Filter component 710 , circuit board 720 , flexible printed circuit board 730 , refrigerator 740 , 0 degree filter 750 , thermistor 760 . DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of this application more clear, the following is a further detailed description of this application in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain this application and are not used to limit this application.

[0026] It should be noted that, although the functional modules are divided in the device schematic diagram and the logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the module division in the device or the order in the flowchart. The terms "first", "second", etc. in the specification, claims and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0027] In addition, the described features, structures or characteristics may be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or more of the specific details, or other methods, components, devices, steps, etc. may be adopted. In other cases, known methods, devices, implementations or operations are not shown or described in detail to avoid blurring the various aspects of the present disclosure.

[0028] It should be noted that the terms "before" and "after" in this application are used to describe the relative positional relationship of optical devices in the direction of the optical path. For example, if A is placed before B, it means that on the optical path passing through B, A is located in front of B. If A is placed after B, it means that on the optical path passing through B, A is located behind B, that is, the light will pass through A first and then through B.

[0029] The Passive Optical Network (PON) system is mainly composed of an optical line terminal (OLT), an optical distribution network (ODN) and an optical network unit (ONU). In order to support the development of big video and cloud-based services, it is usually necessary to support multiple optical transceivers with different wavelengths for the transmission and reception of optical signals. In some application scenarios, the optical transceiver using Combo PON technology can achieve a smooth upgrade from GPON to 10G GPON, thus providing a convenient solution for gigabit speed-up. However, the transmitting and receiving optoelectronic chips of the optical transceiver implemented using Combo PON technology are encapsulated in the same (Transistor Outline, TO), and then the external wavelength division multiplexing (WDM) filters, structural parts and lenses are used to realize the combination and division of optical signals with different wavelengths and incident optical signals with different wavelengths. When the transition band of the transmitting laser wavelength or the receiving detector wavelength is too narrow, the WDM filter is sensitive to the incident angle of light. The installation angle of the WDM filter and the incident angle of light may cause the isolation of adjacent channels to deteriorate or the insertion loss of the incident light and the outgoing light to increase, thereby reducing the performance of the transmitting and receiving ends. Therefore, the use of Combo PON technology will make the manufacturing process very complicated while taking into account the performance. At the same time, the receiving end of the optical transceiver in other application scenarios uses a thin film filter to achieve the splitting of the receiving end. However, the technology of thin film filters is aimed at application scenarios with large wavelength intervals to be separated. For scenarios with small wavelength intervals at the receiving end (such as optical transceiver under 50G PON), the use of thin film filter splitting technology will make it difficult to guarantee the yield and isolation indicators of the product. Therefore, although the manufacturing process can be simplified by realizing independent packaging of receiving and sending, it cannot meet the performance requirements of more PON systems. At the same time, in some other embodiments, there is an optical transceiver device that packages the transmission and reception separately in a coaxial (Transistor Outline, TO) package, and then realizes the transceiver set through an external filter; however, this method requires multiple filters to realize wavelength division multiplexing and demultiplexing, and requires the control of the incident angle of TO and the adjustment of the position of each filter, which brings great difficulties to the process, and after the transition band is less than 10nm, the coating process of the filter is very demanding, and the production yield is reduced. Therefore, the use of independent TO packaging cannot take into account the convenience of process manufacturing and performance. Therefore, the optical transceiver in the related art cannot take into account both performance and process manufacturing convenience. There is an urgent need for an optical transceiver that supports multi-channel transceiver of different wavelengths and has a simple manufacturing process.Based on this, the present application proposes an optical transceiver and an optical line terminal, which can support the transmission and reception of multiple channels with different wavelengths and have a simpler manufacturing process.

[0030] Reference Figures 1 to 8 As shown, the optical transceiver device provided according to the present application includes:

[0031] The optical transmission module 100 includes at least one transmitting device 110 and a multiplexing component 170; each transmitting device 110 is used to output a transmission optical signal of a preset wavelength; the multiplexing component 170 is used to combine and transmit the transmission optical signals sent by all the transmitting devices 110;

[0032] The optical receiving module 200 includes at least one receiving device 210 and a demultiplexing component 180; the demultiplexing component 180 is used to split the incident optical signal and transmit it to the corresponding receiving device 210; the receiving device 210 is used to receive an incident optical signal of a preset wavelength;

[0033] The transceiver splitter module 300 is used to transmit the transmitted optical signal emitted from the multiplexing component 170 to the outside, and to transmit the incident optical signal input from the outside to the demultiplexing component 180 .

[0034] Therefore, the same optical port output of multiple transmitted optical signals is realized through the multiplexing component 170, and the same optical port input of multiple incident optical signals is realized through the demultiplexing component 180. The control of the incident and output light angles by the multiplexing component 170 and the demultiplexing component 180 is simpler and has lower requirements. The optical path integration of the transmitting end and the receiving end is realized by the multiplexing component 170 and the demultiplexing component 180 respectively, which can simplify the optical devices required in the optical transmission and reception paths. Therefore, the optical signal coupling adjustment process can be reduced. Therefore, compared with the related technology, the embodiment of the present application can support multi-channel reception and transmission of different wavelengths and has a simpler manufacturing process while taking into account the performance.

[0035] It should be noted that the optical transmitting module 100 is used to emit a combined optical transmission signal to the transceiver branch module 300, and the number of transmitting devices 110 is used to determine the number of wavelengths of the optical transmission signal that can be emitted by the optical transmitting module 100; the optical receiving module 200 is used to receive and process the combined incident optical signal emitted from the transceiver branch module 300, and the number of receiving devices 210 is used to determine the number of wavelengths of the incident optical signal that the optical receiving module 200 is allowed to process. The multiplexing component 170 supports the output of multiple optical transmission signals of different wavelengths; the demultiplexing component 180 supports the output of multiple incident optical signals of different wavelengths. Therefore, those skilled in the art can achieve the transmission of specific multiple optical transmission signals and the reception of multiple incident optical signals by adjusting the number of transmitting devices 110 and receiving devices 210 and selecting the multiplexing component 170 and demultiplexing component 180 that match them.

[0036] It should be noted that, in some embodiments, the multiplexing component 170, i.e., the MUX component, includes a first optical substrate 130 and at least one first filter 120 corresponding to the transmitting device 110; each of the first filters 120 is arranged on one first optical substrate 130, and the first filter 120 is used to allow only the transmitting optical signal of the preset wavelength to enter the first optical substrate 130; the first optical substrate 130 is used to combine the transmitting optical signal received by the first filter 120 and transmit it to the transceiver branch module 300. When there are multiple first filters 120, multiple transmitting optical signals of different wavelengths enter the first optical substrate 130 through the corresponding first filters 120 and then are combined and emitted. In some embodiments, the first optical substrate 130 is set as a flat glass, and the transmitting optical signal passes through the flat glass and is reflected in the flat glass by coating on the flat glass; wherein, the first filter 120 can also be coated to allow the light of a fixed wavelength to pass through and reflect the light of other unnecessary wavelengths, so in actual applications, the coating can be customized according to the wavelength of the corresponding transmitting device 110 to meet the design requirements. For example, refer to Figure 2 In the optical transceiver device of an embodiment shown, three transmitting devices 110 are provided, and correspondingly, three first filters 120 are provided. The three first filters 120 are arranged on the first optical substrate 130 at intervals, and the positions of the three first filters 120 correspond one by one to the positions of the three transmitting devices 110. The transmission light signal of a preset wavelength emitted by each transmitting device 110 enters the first optical substrate 130 through the corresponding first filter 120, and the three transmission light signals of different wavelengths are combined and emitted in the first optical substrate 130.

[0037] It should be noted that, in some embodiments, the first filter 120 can be attached to the first optical substrate 130 by light-transmitting glue. At this time, when the position of the first filter 120 on the first optical substrate 130 corresponds to the light-emitting position of the emitting device 110, it can be ensured that the emission light signal emitted by the emitting device 110 is coupled into the corresponding first filter 120 and output through the first optical substrate 130. In some embodiments, when the MUX component is packaged, the position of the first filter 120 and the first optical substrate 130 are fixed to form a semi-finished product, and the semi-finished product is aligned with the position of the emitting device 110.

[0038] It should be noted that, in some embodiments, the demultiplexing component 180, i.e., the DeMUX component, includes at least one second filter 220 and a second optical substrate 230 corresponding to the receiving device 210, and at least one second filter 220 is disposed on the second optical substrate 230; the second optical substrate 230 is used to send the incident light signal to the second filter 220, and the second filter 220 is used to allow only the incident light signal of the preset wavelength received to be emitted to the corresponding receiving device 210. In some embodiments, the second optical substrate 230 is configured as a flat glass, and the incident light signal is allowed to pass through the flat glass and be reflected in the flat glass by coating the flat glass. Among them, the second filter 220 can also be coated to allow light of a fixed wavelength to pass through and reflect light of other unnecessary wavelengths. Therefore, in actual applications, the coating can be individually customized according to the wavelength of the corresponding receiving device 210 to meet the design requirements. For example, refer to Figure 2 In the optical transceiver shown, three receiving devices 210 are provided, and correspondingly, three second filters 220 are provided. The three second filters 220 are arranged at intervals on the second optical substrate 230, and the positions of the three second filters 220 correspond one by one to the positions of the three transmitting devices 110. Three incident light signals of different wavelengths are combined and enter the second optical substrate 230 and then emitted to the three second filters 220. At this time, the second filter 220 allows incident light signals of specific wavelengths to be emitted, so that the three receiving devices 210 all receive an incident light signal of a preset wavelength.

[0039] It should be noted that when the DeMUX component is packaged, the position of the DeMUX component can be fixed by red light targeting. Specifically, red light is injected into the light inlet of the shell through a collimator, and the red light enters the second optical substrate 230, and then is transmitted through the second filter 220. The position of the DeMUX component is adjusted and the spot position and size of the incident light signal coming out of the second filter 220 on the DeMUX component are monitored until the light emitting position of each second filter 220 is consistent with the relative position and spacing between the corresponding receiving devices 210, and the energy is most concentrated. At this time, the adjusted DeMUX is fixed in the shell.

[0040] It should be noted that the optical transmitting module 100 and the optical receiving module 200 can be packaged independently or integrated in the same packaging shell 610. By sealing the optical transmitting module 100 and the optical receiving module 200 in the shell, the optical devices in the optical transmitting module 100 and the optical receiving module 200 can be sealed and protected, thereby extending the service life of the optical devices.

[0041] For example, refer to Figure 2 and Figure 3 In the two embodiments of the first type of examples shown, the optical transmitting module 100 and the optical receiving module 200 are integrated in the same packaging shell 610 , and the transceiver branching module 300 is connected to the packaging shell 610 .

[0042] For example, refer to Figure 5 In the second type of exemplary embodiment shown, the optical receiving module 200 and the optical transmitting module 100 are independently packaged, the optical transmitting module 100 is packaged in the second sub-package shell 630, the optical receiving module 200 is packaged in the first sub-package shell 620, and the transceiver branch module 300 is externally placed in the first sub-package shell 620 and the second sub-package shell 630.

[0043] For example, refer to Figures 6 to 8 In the third type of exemplary embodiment shown, the optical receiving module 200 and the optical transmitting module 100 are independently packaged, the optical transmitting module 100 is packaged in the fourth sub-package shell 650, and the optical receiving module 200 is packaged in the third sub-package shell 640, and the third sub-package shell 640 is connected to the outer side wall of the fourth sub-package shell 650.

[0044] It should be noted that the transceiver splitter module 300 can be configured as an external wavelength division multiplexing component (refer to Figure 5 The optical converging assembly may also be configured as an optical converging assembly connected to the packaging shell where the optical receiving module 200 is located. The optical converging assembly includes a first converging lens 310 and an adapter 320 (see Figure 2 , Figure 3 , Figure 6 As shown). The first converging lens 310 can be placed outside the packaging shell that encapsulates the optical receiving module 200 or built into the packaging shell of the optical receiving module 200; the first converging lens 310 can also be embedded in the packaging shell. The first converging lens 310 and the adapter 320 can be integrally formed (such as installing the first converging lens 310 into the front end of the adapter 320 plug) or can be separately arranged. In this regard, the embodiment of the present application does not impose too many restrictions on the structure and installation position of the transceiver branch module 300, and it only needs to meet the optical path requirements of the above-mentioned optical transmitting module 100 and the optical receiving module 200.

[0045] For example, refer to Figure 2In one embodiment shown, the transceiver splitter module 300 includes a first converging lens 310 and an adapter 320. The optical transmitter module 100 and the optical receiver module 200 are integrated in the same encapsulation shell 610. The encapsulation shell 610 is provided with a through hole, in which a flat glass can be arranged, or the adapter 320 can be embedded. The connection between the adapter 320 and the encapsulation shell 610 can be connected by laser welding or fixed with glue. Correspondingly, the first converging lens 310 can be arranged inside the encapsulation shell 610 or outside the encapsulation shell 610.

[0046] It should be noted that for the independently packaged optical transmitter module 100 and optical receiver module 200, as well as the optical transmitter module 100 and optical receiver module 200 integrated in the same package shell 610, the transmitter device 110 and the receiver device 210 can realize the electrical connection between the external circuit and the internal optical device through gold wire bonding. Exemplarily, a circuit board 720 is set on the package shell, and the circuit board 720 is connected to the flexible printed circuit board 730 through gold wire bonding. Exemplarily, the package shell is connected to the rigid-flexible board, and gold wire bonding is set on the rigid-flexible board, so that the circuit board 720 and the flexible printed circuit board 730 are replaced by the rigid-flexible board, thereby simplifying the external connection structure.

[0047] It should be noted that the transmitted optical signal emitted by the transmitting device 110 and the incident optical signal received by the receiving device 210 can be distributed at a preset angle, and it is only necessary that the incident optical signal can be separated one by one from the demultiplexing component 180 .

[0048] It is understandable that, in some embodiments, the transmitting device 110 includes a transmitting laser 111, and a transmitting lens 112 corresponding to the transmitting laser 111; the transmitting lens 112 is placed in front of the light output side of the corresponding transmitting laser 111; the transmitting laser is used to transmit a transmission light signal of a preset wavelength; the transmitting lens 112 is used to convert the corresponding transmission light signal into collimated light. Different transmitting lasers 111 send transmission light signals of different wavelengths.

[0049] For example, refer to Figures 2 to 8The embodiments shown all have the same transmitting device 110 and MUX component, wherein three transmitting lasers 111 are provided, and the transmitting optical signals of different wavelengths emitted by the three transmitting lasers 111 are converted into collimated light after passing through the corresponding transmitting lenses 112. The collimated light emitted by the three transmitting lenses 112 enters the MUX component, and the MUX component combines the collimated light corresponding to the three transmitting lasers 111 and sends it to the transceiver branch module 300. Correspondingly, in some embodiments, when the MUX component includes a first optical substrate 130 and three first filters 120 corresponding to the transmitting device 110, at this time, the first filter 120 is used to receive the collimated light emitted by the corresponding transmitting lens 112, and the first optical substrate 130 combines and emits the collimated light received by the three first filters 120.

[0050] It is understandable that, in some embodiments, the optical transmission module 100 further includes a backlight detector 113 which is arranged in a one-to-one correspondence with the transmission laser 111, and the backlight detector 113 is arranged at the light output side of the corresponding transmission laser 111; wherein,

[0051] The backlight detector 113 is used to detect the optical power state of the corresponding emitting laser 111 .

[0052] For example, refer to Figures 2 to 8 The embodiments shown all have the same transmitting device 110 and MUX component, wherein three transmitting lasers 111, three backlight detectors 113 and three transmitting lenses 112 are provided. The transmitting light signals of different wavelengths emitted by the three transmitting lasers 111 are converted into collimated light after passing through the transmitting lens 112. The collimated light enters the MUX component. The backlight detector 113 detects the optical power state of the corresponding transmitting laser 111 and adjusts the optical power of the transmitting light signal emitted by the transmitting laser 111 according to the optical power state.

[0053] It should be noted that, in some embodiments, the optical transmitter module 100 further includes a first heat sink 140, which is used to support the transmitter device 110 and can also be used to adjust the height of the light output axis of the transmitting laser 111 to be consistent with the optical axis of the transmitting lens 112. In some embodiments, each transmitting laser 111 corresponds to a first heat sink 140.

[0054] It should be noted that the mounting between the emitting laser 111 and the first heat sink 140 can be carried out by using a metal solder eutectic method, which is conducive to ensuring good heat dissipation between the laser chip and the heat sink. Other mounting methods can also be used. In this regard, the embodiment of the present application does not limit the mounting method of the emitting laser 111. For example, refer to Figure 1 to Figure 2As shown, taking the first heat sink 140 as an example of using ceramic material, metallization is performed on the surface of the first heat sink 140 so as to be electrically connected with gold wire bonding. In some embodiments, a plurality of first heat sinks 140 are disposed on the third heat sink 150 .

[0055] It should be noted that, in some embodiments, the optical transmission module 100 further includes filtering components 710 such as a first capacitor and a first resistor, and the first capacitor and the first resistor are disposed on the first heat sink 140 through a metal solder eutectic and silver paste pasting process.

[0056] For example, refer to Figures 2 to 8 The embodiments shown all have the same transmitting device 110 and MUX components, wherein the optical transmitting module 100 further includes a first heat sink 140, a filter device 710, a transmitting laser 111, a transmitting lens 112 corresponding one-to-one to the transmitting laser 111, and a backlight detector 113 arranged one-to-one to the transmitting laser 111; the filter device 710, the transmitting laser 111, three transmitting lenses 112 corresponding one-to-one to the transmitting laser 111, and three backlight detectors 113 arranged one-to-one to the transmitting laser 111 are all arranged on the first heat sink 140, and the filter device 710 is arranged on one side of the transmitting laser 111.

[0057] It can be understood that at least three transmitting lasers 111 are provided, and the modes supported by the three transmitting lasers 111 are 50GPON, GPON and XGPON respectively.

[0058] It should be noted that in this application, XGPON can be a traditional XGPON, that is, a passive optical network with 10-Gigabit capability, providing asymmetric 10G transmission (maximum downstream line rate: 9.Gbit / s, maximum upstream line rate: 2.Gbit / s); it can also be a symmetric passive optical network with 10-Gigabit capability, providing symmetric 10G transmission (maximum downstream line rate: 9.Gbit / s, maximum upstream line rate: 9.Gbit / s).

[0059] For example, if there are three transmitting devices 110, there are three transmitting lasers 111, and the modes they support are 50GPON, GPON and XGPON. At this time, the wavelengths of the output incident optical signals are the wavelengths corresponding to 50GPON, GPON and XGPON.

[0060] Therefore, those skilled in the art can selectively set the number of transmitting devices 110 and the mode composition of the transmitting devices 110 according to actual needs, and the embodiments of the present application do not limit this.

[0061] Understandably, referring to Figure 2 As shown, in some embodiments, the optical transmitter module 100 further includes an isolator 114; the isolator 114 is placed in front of the light-emitting side of the transmitter device 110. The isolator 114 is used to prevent the transmitted optical signal from entering the transmitting laser 111 after reflection, thereby causing unstable performance; the isolator 114 is attached to the first heat sink 140, and the attachment method can be conductive or non-conductive glue.

[0062] It should be noted that the number of isolators 114 can be selectively set according to actual needs. One isolator 114 can be set for each transmitting device 110, each transmitting device 110 is configured one by one, or one or more of them are configured one by one. Multiple transmitting devices 110 can also share one isolator 114. This application does not limit this. Figure 2 As shown, it is only arranged between one of the transmitting devices 110 and the MUX component.

[0063] It is understandable that, in some embodiments, the receiving device 210 includes a receiving detection unit 550 and a receiving lens 560 and a transimpedance amplifier 570 corresponding to the receiving detection unit 550, wherein the receiving lens 560 is disposed at the light incident side of the corresponding receiving detection unit 550; the receiving detection unit 550 is disposed at the light incident side of the corresponding transimpedance amplifier 570; wherein the receiving lens 560 is used to receive an incident light signal of a preset wavelength emitted by the demultiplexing component 180 and transmit the incident light signal to the corresponding receiving detection unit 550; the receiving detection unit 550 is used to convert the incident light signal into a received electrical signal and transmit the received electrical signal to the corresponding transimpedance amplifier 570; and the transimpedance amplifier 570 is used to amplify the received electrical signal.

[0064] It should be noted that, in some embodiments, the receiving detection unit 550, the receiving lens 560, and the transimpedance amplifier 570 are arranged on the second heat sink 580. In some embodiments, the second heat sink 580 is also provided with a second capacitor and a second resistor and other filter devices 710. Among them, the light shielding plate 612 of each component in the receiving device 210 can be pasted with different processes according to the actual heat dissipation requirements. For example, the bottom of the transimpedance amplifier 570 needs to be pasted with silver paste, so as to improve the heat dissipation. The receiving lens 560, the receiving detection unit 550, etc. have relatively low requirements for heat dissipation, so the process of pasting with silver paste or non-conductive glue can be adopted.

[0065] For example, refer to Figures 2 to 5The embodiments shown all have the same transmitting device 110, MUX component, DeMUX component and receiving device 210; three transmitting devices 110 are provided, each of which includes a transmitting laser 111 and a transmitting lens 112 corresponding to the transmitting laser 111; three receiving devices 210 are provided, each of which includes a receiving detection unit 550 and a receiving lens 560 and a transimpedance amplifier 570 corresponding to the receiving detection unit 550. The transmitting light signal emitted by the transmitting laser 111 is converted into collimated light after passing through the transmitting lens 112, and the collimated light enters the MUX component, and the MUX component combines the collimated light corresponding to the three transmitting lasers 111 and sends it to the transceiver splitter module 300. The transceiver splitter module 300 sends the incoming incident light signal to the DeMUX component, and the DeMUX component distributes the incident light signal to the receiving lens 560. The incident light signal passing through the receiving lens 560 enters the receiving detection unit 550 for photoelectric conversion, and sends the converted light signal to the transimpedance amplifier 570 for amplification. Further, taking the DeMUX component including the second optical substrate 230 and three second filters 220 corresponding to the receiving device 210 as an example, the second optical substrate 230 splits the combined incident light signal and sends it to the three second filters 220, and the second filters 220 perform optical filtering on the split incident light signal, so that the incident light signal of the preset wavelength is emitted from the second filter 220 to the corresponding receiving lens 560.

[0066] It is understandable that the optical transceiver device also includes a packaging shell 610, the optical transmitting module 100 and the optical receiving module 200 are both arranged in the packaging shell 610, and the receiving detection unit 550 and the transmitting laser 111 are arranged in parallel in the packaging shell 610, so that the incident light signal entering the light input side of the receiving detection unit 550 and the transmitting light signal emitted from the light output side of the transmitting laser 111 are parallel.

[0067] It should be noted that by arranging the receiving detection unit 550 and the transmitting laser 111 in parallel in the packaging shell 610, the size of the device can be reduced as much as possible from a structural perspective.

[0068] Understandably, referring to Figure 2 and Figure 3 As shown, the optical transceiver device also includes a packaging shell 610, the optical transmitting module 100 and the optical receiving module 200 are both arranged in the packaging shell 610, and the receiving detection unit 550 and the transmitting laser 111 are arranged vertically to each other in the packaging shell 610.

[0069] Therefore, by integrating the optical transmitting module 100 and the optical receiving module 200 into the same package housing 610 , the optical transceiver device is more integrated and the volume of the overall component is smaller.

[0070] Understandably, referring to Figure 2 and Figure 3 As shown, the transceiver splitter module 300 includes an optical division multiplexing device 330, a first converging lens 310 and an adapter 320, and the optical division multiplexing device 330, the first converging lens 310 and the adapter 320 are all arranged at the light-incoming side of the demultiplexing component 180; and the optical division multiplexing device 330, the first converging lens 310 and the adapter 320 are all arranged at the light-outgoing side of the multiplexing component 170; wherein,

[0071] The optical division multiplexing device 330 is used to receive the transmission optical signal emitted by the multiplexing component 170 and transmit the transmission optical signal to the first converging lens 310, and transmit the received incident optical signal to the demultiplexing component 180;

[0072] The first converging lens 310 is used to converge the transmitted optical signal to the adapter 320 and transmit the received incident optical signal to the optical division multiplexing device 330;

[0073] The adapter 320 is used to transmit the converged emission light signal to the outside, and to transmit the external input incident light signal to the first convergent lens 310 .

[0074] It is understandable that the optical division multiplexing device is one of a wavelength combiner / demultiplexer, an optical branching wavelength division multiplexer, and a filter assembly.

[0075] For example, Figure 2 For example, the optical division multiplexing device 330 is a wavelength combiner / demultiplexer, which transmits the transmitted optical signal emitted by the multiplexing component 170 to the first converging lens 310 , and transmits the incident optical signal emitted by the first converging lens 310 to the demultiplexing component 180 .

[0076] For example, Figure 4 The optical multiplexing device 330 is a filter assembly as an example, combined with Figure 2 and Figure 3 As shown, the filter assembly transmits the emission light signal emitted by the multiplexing assembly 170 to the first converging lens 310, and transmits the incident light signal emitted by the first converging lens 310 to the demultiplexing assembly 180. It should be noted that the filter assembly is realized by combining multiple filters.

[0077] It should be noted that the optical splitting wavelength division multiplexer is a wavelength division multiplexer with a PLC structure, which is built into the packaging shell 610 .

[0078] It should be noted that, in some embodiments, referring to Figure 2 and Figure 3 As shown, a light blocking plate 612 for reducing optical crosstalk is further provided between the receiving device 210 and the transmitting device 110 .

[0079] It should be noted that the light blocking plate 612 can be configured as a device or a light absorbing plate with a light absorbing material coated on the surface, such as a coated glass material or a metal material, so as to avoid or reduce the optical crosstalk between the transmitting device 110 and the receiving device 210.

[0080] For example, refer to Figure 2 As shown, when the optical transmitting module 100 and the optical receiving module 200 are arranged in parallel, the light blocking plate 612 is arranged between the first heat sink 140 and the second heat sink 580 , so as to isolate the mutual crosstalk between the transmitting device 110 and the receiving device 210 .

[0081] For example, refer to Figure 3 As shown, the optical transmitting module 100 and the optical receiving module 200 are arranged perpendicular to each other, the light blocking plate 612 is arranged between the first heat sink 140 and the second heat sink 580, and the two ends of the extended light blocking plate 612 are respectively close to the receiving device 210 and the transmitting device 110.

[0082] Understandably, referring to Figure 5 As shown, the optical transceiver device also includes a first sub-package shell 620 and a second sub-package shell 630; the optical receiving module 200 is arranged in the first sub-package shell 620, the optical transmitting module 100 is arranged in the second sub-package shell 630, and the transceiver branch module 300 is placed outside the first sub-package shell 620 and the second sub-package shell 630.

[0083] For example, refer to Figure 5 As shown, the external transceiver splitter module 300 is used to combine and split the transmitted optical signal and the incident optical signal, thereby realizing the reception and transmission of multiple optical signals.

[0084] Understandably, referring to Figure 5 As shown, the transceiver splitter module 300 includes an external wavelength division multiplexer, which is provided with a first interface 351, a second interface 352 and a third interface 353; the first interface 351 is connected to the second sub-encapsulation shell 630, and the second interface 352 is connected to the first sub-encapsulation shell 620, wherein,

[0085] The first interface 351 is used to receive the transmitted optical signal emitted by the multiplexing component 170 and transmit it to the third interface 353;

[0086] The third interface 353 is used to send the transmitted optical signal to the outside, or transmit the external input incident optical signal to the second interface 352;

[0087] The second interface 352 is used to transmit the received incident optical signal to the demultiplexing component 180 .

[0088] For example, refer to Figure 5 As shown, the external wavelength division multiplexer, namely the WDM multiplexing device, realizes the multiplexing and demultiplexing of the transmitted optical signal and the incident optical signal through the first interface 351 , the second interface 352 and the third interface 353 .

[0089] Understandably, referring to Figures 6 to 8 As shown, in other embodiments, the receiving device 210 includes a reflective component 510 and a coaxial package receiver 520, and the reflective component 510 is disposed behind the coaxial package receiver 520; the optical transceiver device also includes a third sub-package housing 640, the reflective component 510 and the demultiplexing component 180 are both disposed in the third sub-package housing 640, and the coaxial package receiver 520 is connected to the third sub-package housing 640; the optical transmitting module 100 is disposed outside the third sub-package housing 640; wherein,

[0090] The reflective component 510 is used to transmit the incident optical signal of the corresponding preset wavelength emitted by the demultiplexing component 180 to the corresponding coaxial package receiver 520 .

[0091] Therefore, the receiving end coaxial packaging is realized by the receiving device 210 including the reflection component 510 and the coaxial packaging receiver 520 .

[0092] It should be noted that, in some embodiments, the reflective assembly 510 includes a reflector 511 and a second converging lens 512, and the position of the reflector 511 is repeatedly adjusted and after each adjustment, the energy and spot size of the incident light signal emitted from the reflector 511 are monitored until the energy and spot size of the incident light signal are within the control range, and then the reflector 511 is fixed with UV glue. Exemplarily, as shown in the figure, three wavelengths of incident light signals are provided, and the three wavelengths of incident light signals enter the DeMUX assembly through the transceiver splitter module 300, and then respectively pass through the three reflectors 511 and the corresponding second converging lenses 512, and are reflected to the coaxial package receiver 520.

[0093] Exemplarily, taking the example of a DeMU component including a second optical substrate 230 and at least one second filter 220 corresponding one-to-one to the receiving device 210, the reflective component 510 is used to receive an incident light signal of a preset wavelength emitted by the second optical substrate 230, and the coaxial packaged receiver 520 is used to emit the incident light signal emitted by the corresponding reflective component 510.

[0094] Therefore, the reflective component 510 and the coaxial packaged receiver 520 are used to achieve independent packaging with the transmitting module, further reducing the difficulty of the manufacturing process.

[0095] Understandably, referring to Figures 6 to 8As shown, the transceiver splitter module 300 includes a third filter 340, a first converging lens 310 and an adapter 320, the first converging lens 310 and the adapter 320 are both arranged at the light-incoming side of the demultiplexing component 180; the third filter 340 is arranged at the light-outgoing side of the multiplexing component 170; wherein,

[0096] The third filter 340 is used to allow the transmitted optical signal to enter the demultiplexing component 180;

[0097] The first converging lens 310 is used to receive the combined transmission optical signal transmitted by the demultiplexing component 180, converge the transmission optical signal to the adapter 320, and transmit the incident optical signal to the demultiplexing component 180;

[0098] The adapter 320 is used to transmit the converged emission light signal to the outside, and to transmit the external input incident light signal to the first convergent lens 310 .

[0099] Exemplarily, taking the example that the DeMUX component includes a second optical substrate 230 and at least one second filter 220 corresponding to the receiving device 210, when the receiving device 210 is a coaxial package, the transceiver splitter module 300 includes a third filter 340, a first converging lens 310 and an adapter 320, and the first converging lens 310 and the adapter 320 are sequentially arranged behind the second optical substrate 230; the third filter 340 is arranged behind the first optical substrate 130; wherein,

[0100] The third filter 340 is used to allow the emission light signal to enter the second optical substrate 230;

[0101] The first converging lens 310 is used to receive the transmission light signal transmitted by the second optical substrate 230, converge the transmission light signal to the adapter 320, and transmit the incident light signal to the second optical substrate 230;

[0102] The adapter 320 is used to transmit the converged emission light signal to the outside, and to transmit the external input incident light signal to the first convergent lens 310 .

[0103] For example, refer to Figures 6 to 8As shown, the second optical substrate 230 and the second filter 220 are mounted in the third sub-package housing 640. The main function of the second optical substrate 230 is to split the wavelength. Similarly, the second optical substrate 230 and the second filter 220 are combined into a semi-finished passive structural component. In order to ensure that the emitted light can pass through the second optical substrate 230 and be incident on the adapter 320 at the same time, the third filter 340 is mounted on the DeMUX. The third filter 340 is used to pass the combined emitted light signal coming out of the MUX component. At the same time, the third filter 340 can reflect the three incident light signals incident from the adapter 320. Figures 6 to 8 , the dotted arrow represents the transmitted light signal, and the solid arrow represents the incident light signal entering from the adapter 320 .

[0104] It should be noted that for the transceiver splitter module 300 including the third filter 340, the first converging lens 310 and the adapter 320, the combined transmission optical signal emitted from the MUX component is converged at the first converging lens 310 after passing through the third filter 340, thereby forming collimated light that is emitted to the ferrule of the adapter 320; the ferrule is then connected to the external optical fiber to realize the output of light. At the same time, the incident optical signal entering the external optical fiber enters the DeMUX component after passing through the ferrule of the adapter 320 and the first converging lens 310. The DeMUX component sends the incident optical signals of different wavelengths to the corresponding reflective component 510, and then outputs them from the coaxial package receiver 520.

[0105] It should be noted that, refer to Figures 6 to 8 As shown, taking the reflective component 510 packaged in the third sub-package housing 640, the transceiver branch module 300 including the third filter 340, the first converging lens 310 and the adapter 320 as an example, the position mounting method of the first converging lens 310 and the adapter 320 is as follows: after determining the position of the reflective component 510, the first converging lens 310 is actively coupled and fixed to the inner wall of the third sub-package housing 640 using the same process as the mounting method of the third filter 340. After the first converging lens 310 is fixed, the position of the adapter 320 is determined.

[0106] It should be noted that, in some embodiments, Figure 6 and Figure 7As shown, the optical transmitting module 100 and the optical receiving module 200 are independently packaged, and the optical transceiver device also includes a fourth sub-package shell 650, and the optical transmitting module 100 is packaged in the fourth sub-package shell 650. The optical transmitting module 100 also includes a displacement prism 160, and the displacement prism 160 is placed in front of the first optical substrate 130. Among them, the displacement prism 160 is used to adjust the optical axis position of the first optical substrate 130. When the combined light emitted by the first optical substrate 130 deviates from the expected position, the displacement prism 160 can be used to assist in the adjustment. The technicians in this field can also directly adjust the first optical substrate 130 so that the optical axis position of the first optical substrate 130 meets the requirements. Therefore, the technicians in this field can choose to set the displacement prism 160 or not according to the actual needs, and this embodiment of the present application is not limited.

[0107] It should be noted that the third sub-package housing 640 is formed by welding the cover plate on the tube shell through a resistance welding process, so as to ensure that the chips and components inside the tube shell work in a protected environment, and ensure the performance and service life of the components of the optical receiving module 200 in the third sub-package housing 640;

[0108] Understandably, referring to Figure 6 and Figure 7 As shown, the third sub-package housing 640 is provided with a first light window and a second light window 641; the optical transceiver device further includes a fourth sub-package housing 650, the optical transmitting module 100 is arranged in the fourth sub-package housing 650, and the fourth sub-package housing 650 is provided with a third light window 651, wherein,

[0109] The first optical window is used to transmit the emission optical signal emitted by the multiplexing component 170 to the second optical window 641;

[0110] The second optical window 641 is used to transmit the incident optical signal input by the transceiver branch module 300 to the demultiplexing component 180, and to transparently transmit the transmitted optical signal to the transceiver branch module 300;

[0111] The third optical window 651 is used to transmit the emission optical signal multiplexed and emitted by the multiplexing component 170 to the first optical window.

[0112] The optical line terminal provided in the present application includes the optical transceiver device as described above.

[0113] It should be noted that the above-mentioned embodiments of the present application, for the optical transceiver device integrating the MUX component and the DeMUX component, provide three schemes of the first type of example, the second type of example and the third type of example from the different packaging forms of the optical transmitting module 100 and the optical receiving module 200 and the relationship between the transceiver branch module 300 and the optical transmitting module 100 and the optical receiving module 200, and explain the three schemes respectively. Those skilled in the art can selectively combine the above-mentioned embodiments to realize the reception and transmission of multi-channel optical signals while being able to produce them with a simpler process.

[0114] It should be noted that the optical transceiver of the present application also includes a temperature control module, which includes a refrigerator 740 and a thermistor 760. Based on the thermistor 760 and the refrigerator 740, the heat of the device generating the heat source is controlled, and the quality of the emitted optical signal outputted by the device is more stable and higher. For example, taking the temperature control module used to control the emission laser 111 in the emission device 110 as an example, the thermistor 760 detects the temperature of the emission laser 111, and adjusts the heat or cooling amount provided by the refrigerator 740 to the emission laser 111 through the temperature, so that the emission laser 111 always works at the expected temperature.

[0115] The following describes the manufacturing methods under the structure of this application for the first and third examples in this application respectively:

[0116] For example, refer to Figures 2 to 4 Taking the optical transceiver shown in the figure as an example, the manufacturing method is as follows:

[0117] 1. A cooler 740 for controlling the temperature of the emitting laser 111 is mounted inside the package shell 610 to control the temperature of the emitting laser 111. The fixing method can be metal solder eutectic or silver paste mounting.

[0118] 2. Mount the third heat sink 150 on the refrigerator 740. The third heat sink 150 is mainly used to adjust the height of the light-emitting axis of the emitting laser 111 to be consistent with the optical axis of the emitting lens 112. Eutectic welding or silver paste mounting process can be used between the third heat sink 150 and the refrigerator 740; the thermistor 760 is fixed on the third heat sink 150 by eutectic welding or silver paste. The refrigerator 740 and the thermistor 760 can be combined to control the operating temperature of the emitting laser 111.

[0119] 4. The three emitting lasers 111 are mounted on the corresponding first heat sinks 140. The mounting between the emitting lasers 111 and the first heat sink 140 is generally carried out by metal solder eutectic method, which is conducive to ensuring good heat dissipation between the emitting lasers 111 and the first heat sink 140. The emitting lasers 111 are generally made of ceramic materials, and a metallization layer is made on the surface of the emitting lasers 111 to realize the gold wire bonding function of the emitting lasers 111, and then electrically connected to the outside.

[0120] 5. The backlight detector 113 and filter components 710 such as the first capacitor and the first resistor may also be mounted on the first heat sink 140, and the mounting method may be metal solder eutectic and silver paste pasting process.

[0121] 6. Mount the MUX component in the package shell 610. Specifically, the first filter 120 and the first optical substrate 130 in the MUX component are glued with light-transmitting glue, and the first optical substrate 130 and the package shell 610 can be glued with conductive glue or non-conductive glue; the mounting positions of the first filter 120 and the first optical substrate 130 need to correspond to the positions of the three emitting lasers 111 to ensure that the light emitted by the emitting laser 111 can be coupled into the corresponding first filter 120 and output through the first optical substrate 130; when adjusting the position, the first filter 120 and the first optical substrate 130 can be first positioned relative to each other, as a semi-finished product with a fixed relative mounting position of the first filter 120 and the first optical substrate 130, to facilitate assembly of the components, and then the first optical substrate 130 with the first filter 120 mounted thereon is loaded into the package shell 610 as a semi-finished product;

[0122] 7. Mount the optical division multiplexing device 330 for receiving and transmitting in the package shell 610. The mounting method of the optical division multiplexing device 330 is the same as that of the MUX component. The position of the optical division multiplexing device 330 also needs to correspond to the position of the MUX component to ensure that the transmitted light can pass through the MUX component and then enter the optical division multiplexing device 330.

[0123] 8. Couple the second filter 220 and the second optical substrate 230 in the DeMUX component. The second filter 220 and the second optical substrate 230 are also usually mounted before entering the packaging shell 610, and then loaded into the packaging shell 610 as semi-finished products. The relative position of the DeMUX component in the packaging shell 610 needs to be fixed by red light targeting: red light is injected into the light inlet of the optical division multiplexing device 330 through a collimator, and the red light enters the second optical substrate 230 after passing through the optical division multiplexing device 330, and then transmits through the second filter 220, adjust the position of the DeMUX component and monitor the spot position and size of the incident light signal coming out of the DeMUX component through the second filter 220, until the position of the light after passing through the second filter 220 is consistent with the relative position and spacing between the corresponding receiving detectors, and the energy is most concentrated, and then the adjusted DeMUX is fixed in the packaging shell 610.

[0124] 9. The second heat sink 580, the transimpedance amplifier 570, the receiving detection unit 550, and the second capacitor, the second resistor and other filtering components 710 are fixed in the packaging shell 610. The bottom of the transimpedance amplifier 570 is glued with silver paste. The other requirements for heat dissipation are relatively low, and the process of silver paste or non-conductive glue can be used.

[0125] 10. The transmitting laser 111, the receiving detection unit 550, the filter device 710, the refrigerator 740, the thermistor 760, etc. are connected to the ceramic circuit board 720 on the packaging shell 610 through gold wire bonding.

[0126] 11. Weld the flexible printed circuit board 730 onto the ceramic circuit board 720 of the package shell 610 to realize the electrical connection between the ceramic circuit board 720 and the flexible printed circuit board 730. Alternatively, the flexible printed circuit board 730 can be directly pressed onto the ceramic circuit board 720 by means of a probe, thereby realizing the electrical connection between the external power supply meter and the optical devices such as the emitting laser 111 and the receiving detection unit 550, the filter device 710 and the refrigerator 740 in the package shell 610 through the probe.

[0127] 12. A through hole is opened on the package shell 610 to form a fourth optical window 611, and a collimator pigtail assembly or an adapter assembly with a lens is first fixed outside the fourth optical window 611, one end of the assembly is opposite to the shell, and the other end is connected to the optical power meter for monitoring the optical power. Current or voltage is applied to the transmitting laser 111, and the transmitting lens 112 is coupled in front of the transmitting laser 111. While moving the position of the transmitting lens 112, the optical power of the collimator light outlet is detected by the optical power meter, so that the detected light output power of the transmitting laser 111 meets the target value, and then the transmitting lens 112 is fixed on the first heat sink 140 when the transmitting laser 111 meets the light output power. The fixing method between the transmitting lens 112 and the first heat sink 140 can be a bonding method of UV glue, specifically, the UV glue is first pre-cured with ultraviolet light, and then fixed by high-temperature baking.

[0128] 13. In order to ensure performance, a corresponding isolator 114 is placed in front of the optical path of the emitting laser 111 to prevent external light from entering the emitting laser 111 after reflection and causing unstable performance; the isolator 114 is adhered to the first heat sink 140, and the pasting method can be conductive or non-conductive glue; the number of isolators 114 can be determined according to the number of emitting lasers 111 after external light reflection.

[0129] 14. Similarly, voltage is applied to the receiving detection unit 550, and light of a certain power is injected through the collimator outside the package shell 610, and the receiving lens 560 is coupled behind the optical path direction of the receiving detection unit 550. While adjusting the position of the receiving lens 560, the photocurrent converted from the receiving detection unit 550 is detected, so that the optical circuits of the receiving detection unit 550 reach the target values ​​respectively, and then the receiving lens 560 that reaches the target value is pre-fixed with UV glue, and then baked at high temperature to fix it;

[0130] 15. After the coupling of the transmitting lens 112 and the receiving lens 560 is completed, the performance indicators and appearance are tested, and then the cover plate is welded and fixed on the shell by parallel sealing welding. The transmitting laser 111, the receiving detection unit 550, the refrigerator 740, the filter device 710, the receiving lens 560, the transmitting lens 112 and the MUX and DeMUX in the shell are sealed in the packaging shell 610, which can play a role of sealing protection and ensure the service life of the components.

[0131] 16. Provide working current and voltage to the transmitting laser 111 and the receiving detection unit 550 in the packaging shell 610 through the flexible board, and then couple the first converging lens 310 with the adapter 320 in an active (powered coupling) or passive (directly glued or laser welded to the outside of the shell) manner, while coupling the adapter 320, monitor the emitted light power and the photoelectric conversion current of the receiving end. Preferably, the first converging lens 310 is actively coupled, and the positions of the first converging lens 310 and the adapter 320 are adjusted to maximize the emitted light power and the photoelectric conversion current of the receiving detection unit 550, and then the first converging lens 310 is fixed to the packaging shell 610 by laser welding, and then the adapter 320 is fixed to the packaging shell 610;

[0132] Therefore, the optical transceiver obtained through steps 1 to 16 in the first example can realize full integration of transmission and reception, and reduce the length of the component. At the same time, because both transmission and reception are packaged in airtight BOX, heat dissipation and high-frequency performance are guaranteed.

[0133] For example, taking a complete structure of a transceiver device of the third example as an example, the manufacturing method is as follows:

[0134] 1. A cooler 740 for controlling the temperature of the emitting laser 111 is mounted inside the fourth sub-package shell 650 to control the temperature of the emitting laser 111; the fixing method can be metal solder eutectic or silver paste mounting.

[0135] 2. Mount the third heat sink 150 on the refrigerator 740. The third heat sink 150 is mainly used to adjust the height of the light-emitting axis of the emitting laser 111 to be consistent with the optical axis of the emitting lens 112. Eutectic welding or silver paste mounting process can be used between the third heat sink 150 and the refrigerator 740; the thermistor 760 is fixed on the third heat sink 150 by eutectic welding or silver paste. The refrigerator 740 and the thermistor 760 can be combined to control the operating temperature of the emitting laser 111.

[0136] 4. The three emitting lasers 111 are mounted on the corresponding first heat sinks 140. The mounting between the emitting lasers 111 and the first heat sink 140 is generally carried out by metal solder eutectic method, which is conducive to ensuring good heat dissipation between the emitting lasers 111 and the first heat sink 140. The emitting lasers 111 are generally made of ceramic materials, and a metallization layer is made on the surface of the emitting lasers 111 to realize the gold wire bonding function of the emitting lasers 111, and then electrically connected to the outside.

[0137] 5. The backlight detector 113 and filter components 710 such as the first capacitor and the first resistor may also be mounted on the first heat sink 140, and the mounting method may be metal solder eutectic and silver paste pasting process.

[0138] 6. After the optical transmission module completes the internal patch of the fourth sub-package shell 650, the transmitting laser 111 is connected to the circuit board 720 on the fourth sub-package shell 650 through gold wire bonding, and then electrically connected through the external flexible board.

[0139] 7. An adapter assembly with a collimating lens is installed outside the third light window 651 of the fourth sub-package shell 650. At the same time, current is applied to the emitting laser 111 to make it emit light. Active coupling is performed on the emitting lens 112 of the emitting laser 111 in the fourth sub-package shell 650 until the optical signal emitted by the MUX assembly meets the requirements, and the emitting lens 112 is fixed by UV glue.

[0140] 8. The fourth sub-package housing 650 is sealed by a resistance welding process to ensure that the interior of the fourth sub-package housing 650 is in a protected environment, thereby ensuring the performance and service life of the optical devices inside.

[0141] 9. The second optical substrate 230 with the second filter 220 attached is mounted in the third sub-package housing 640. The main function of the second optical substrate 230 is to split wavelengths. Similarly, the second filter 220 and the second optical substrate 230 are combined into a semi-finished passive structural component and mounted together in the third sub-package housing 640. In order to ensure that the transmitted optical signal can pass through the second optical substrate 230 and be incident on the adapter 320 at the same time, a third filter 340 is mounted on the DeMUX. The third filter 340 is used to pass the combined transmitted optical signal coming out of the third optical window 651, and the third filter 340 can reflect the incident optical signal incident from the adapter 320. The dotted arrow represents the transmitted optical signal, and the solid arrow represents the incident optical signal to be received entering from the adapter 320.

[0142] 10. Place a test adapter with a collimating lens at the common light inlet and outlet (i.e., the second light window 641) outside the third sub-package shell 640, and then input light of a certain energy through the test adapter to actively couple the three reflectors 511 in sequence, adjust the positions of the three reflectors 511 until the energy and spot size of the light emitted from the reflectors 511 are monitored to be within the control range, and fix the three reflectors 511 with UV glue.

[0143] 11. Replace the test adapter 320 with a collimating lens on the outside with an adapter 320, and actively couple and fix the first converging lens 310 in the third sub-package housing 640 using the same process as the mounting method of the above-mentioned filter.

[0144] 12. Continue to place the adapter 320 outside the third sub-package shell 640, and then actively couple the second converging lens 512 for converging light through the fixed first converging lens 310 and the mounted reflector 511. The second converging lens 512 is placed in front of the three received TOs (i.e., coaxial package receivers 520), and is used to converge three beams of incident light signals with different wavelengths reflected from the three reflectors 511. The position of the second converging lens 512 is adjusted, and the position and energy of the light spot coming out of the lens are monitored until they are within the control range; when the position and energy of the light spot are within the control range, the second converging lens 512 is also fixed with UV glue.

[0145] 13. Set the third sub-package shell 640 on the fourth sub-package shell 650, and then place the adapter 320 at the common input and output optical ports of the fourth sub-package shell 650 (i.e., the second optical window 641), and operate the three emitting lasers 111 by applying current. After emitting the emitting light signal, adjust the position of the fourth sub-package shell 650 in the X and Y directions and the position of the adapter 320 so that the optical power of the three emitting lasers 111 is within the required power range, and then use the laser welding process to connect the third sub-package shell 640 and the fourth sub-package shell 650 to complete the active coupling and fixation of the third sub-package shell 640 and the fourth sub-package shell 650.

[0146] 14. The output power of the wavelength of the incident light signal is made to meet the specification by adjusting the X, Y, and Z positions of the adapter 320, and the adapter 320 is fixed to the third sub-package housing 640 by laser welding.

[0147] 15. Three incident light signals are input from the optical port of the adapter 320, and coupled to the three TOs in sequence. The APD detectors that monitor and receive the three TOs have the largest response current. Then, the three TOs are fixed in sequence with UV glue. After UV baking, the gaps between the three TOs and the first sub-package shell 620 are filled with strong glue to fix the positions of the three TOs. Here, a 0-degree filter is placed outside the three TOs to block other interfering light signals entering from the common port. In addition, the fixing scheme between the three receiving TOs and the shell 27 can also be achieved by laser welding.

[0148] Therefore, the optical transceiver device obtained through the above third type of examples 1 to 15 has a simpler process.

[0149] It should be noted that since the structure of the transceiver device in the second type of example is that the optical transmitting module 100 and the optical receiving module 200 are independently packaged, and the transmitting device 110 and the multiplexing component 170 of the optical transmitting module 100 are the same as those of the first type of example, and the receiving device 210 and the demultiplexing component 180 of the optical receiving module 200 are the same as those of the first type of example, therefore, this application does not go into too much detail, and the second type of example can be made with reference to the first type of example.

[0150] The above is a specific description of the preferred implementation of the present application, but the present application is not limited to the above-mentioned implementation mode. Technical personnel familiar with the field can also make various equivalent deformations or substitutions without violating the spirit of the present application. These equivalent deformations or substitutions are all included in the scope defined by the claims of the present application.

Claims

1. An optical transceiver, characterized in that: The optical transceiver device comprises: An optical transmission module, the optical transmission module comprising at least one transmission device and a multiplexing component; each of the transmission devices is used to output a transmission optical signal of a preset wavelength; the multiplexing component is used to combine and transmit the transmission optical signals sent by all the transmission devices; An optical receiving module, the optical receiving module comprising at least one receiving device and a demultiplexing component; the demultiplexing component is used to branch an incident optical signal and transmit it to a corresponding receiving device; each receiving device is used to receive an incident optical signal of a preset wavelength; The transceiver splitter module is used to transmit the transmitted optical signal emitted from the multiplexing component to the outside, and to transmit the incident optical signal input from the outside to the demultiplexing component.

2. The optical transceiver according to claim 1, characterized in that: The emitting device includes an emitting laser and an emitting lens corresponding to the emitting laser one by one; the emitting lens is placed in front of the light emitting side of the corresponding emitting laser; wherein, The transmitting laser is used to transmit a transmission light signal of a preset wavelength; The transmitting lens is used to collimate the corresponding transmitting optical signal and transmit it to the multiplexing component.

3. The optical transceiver according to claim 2, characterized in that: The receiving device includes a receiving detection unit and a receiving lens and a transimpedance amplifier corresponding to the receiving detection unit. The receiving lens is arranged at the light incident side of the corresponding receiving detection unit; the receiving detection unit is arranged at the light incident side of the corresponding transimpedance amplifier; wherein, The receiving lens is used to receive the incident light signal of the preset wavelength emitted by the demultiplexing component and transmit the incident light signal to the corresponding receiving detection unit; The receiving detection unit is used to convert the incident optical signal into a receiving electrical signal, and transmit the receiving electrical signal to the corresponding transimpedance amplifier; The transimpedance amplifier is used to amplify the received electrical signal.

4. The optical transceiver according to claim 3, characterized in that: The optical transceiver device further comprises a packaging shell, the optical transmitting module and the optical receiving module are both arranged in the packaging shell, and the receiving detection unit and the transmitting laser are arranged in parallel in the packaging shell.

5. The optical transceiver according to claim 3, characterized in that: The optical transceiver device further comprises a packaging shell, the optical transmitting module and the optical receiving module are both arranged in the packaging shell, and the receiving detection unit and the transmitting laser are arranged perpendicular to each other in the packaging shell.

6. The optical transceiver according to claim 4 or 5, characterized in that: The transceiver splitter module includes an optical division multiplexing device, a first converging lens and an adapter, wherein the optical division multiplexing device, the first converging lens and the adapter are all arranged at the light input side of the demultiplexing component; and the optical division multiplexing device, the first converging lens and the adapter are all arranged at the light output side of the multiplexing component; wherein, The optical division multiplexing device is used to receive the transmitted optical signal emitted by the multiplexing component and transmit the transmitted optical signal to the first converging lens, and transmit the received incident optical signal to the demultiplexing component; wherein, The first converging lens is used to converge the transmitted optical signal to the adapter, and transmit the received incident optical signal to the optical division multiplexing device; The adapter is used to transmit the converged emission light signal to the outside, and to transmit the externally input incident light signal to the first converging lens.

7. The optical transceiver according to claim 6, characterized in that: The optical division multiplexing device is one of a wavelength combiner / demultiplexer, an optical branching wavelength division multiplexer and a filter assembly.

8. The optical transceiver according to claim 4 or 5, characterized in that: A light shielding plate for reducing optical crosstalk is also arranged between the receiving device and the transmitting device.

9. The optical transceiver according to claim 3, characterized in that: The optical transceiver device also includes a first sub-package shell and a second sub-package shell; the optical receiving module is arranged in the first sub-package shell, the optical transmitting module is arranged in the second sub-package shell, and the transceiver branch module is externally placed in the first sub-package shell and the second sub-package shell.

10. The optical transceiver according to claim 9, characterized in that: The transceiver splitter module includes an external wavelength division multiplexer, and the external wavelength division multiplexer is provided with a first interface, a second interface and a third interface; the first interface is connected to the second sub-encapsulation shell, and the second interface is connected to the first sub-encapsulation shell, wherein, The first interface is used to receive the transmitted optical signal emitted by the multiplexing component and transmit it to the third interface; The third interface is used to send the transmitted optical signal to the outside, or transmit the external input incident optical signal to the second interface; The second interface is used to transmit the received incident optical signal to the demultiplexing component.

11. The optical transceiver according to claim 2, characterized in that: The receiving device includes a reflective component and a coaxial package receiver, wherein the reflective component is disposed at the light incident side of the coaxial package receiver; the optical transceiver device also includes a third sub-package housing, wherein the reflective component and the demultiplexing component are both disposed in the third sub-package housing, and the coaxial package receiver is connected to the third sub-package housing; The optical transmission module is externally disposed in the third sub-package housing; wherein, The reflective component is used to transmit the incident optical signal of the preset wavelength emitted by the demultiplexing component to the corresponding coaxial package receiver.

12. The optical transceiver according to claim 11, characterized in that: The transceiver splitter module includes a third filter, a first converging lens and an adapter, wherein the first converging lens and the adapter are both arranged at the light-incoming side of the demultiplexing component; the third filter is arranged at the light-outgoing side of the multiplexing component; wherein, The third filter is used to allow the emission optical signal to enter the demultiplexing component; The first converging lens is used to receive the transmitted optical signal transmitted by the demultiplexing component, converge the transmitted optical signal to the adapter, and transmit the incident optical signal to the demultiplexing component; The adapter is used to transmit the converged emission light signal to the outside, and to transmit the externally input incident light signal to the first converging lens.

13. The optical transceiver according to claim 1, characterized in that: The multiplexing component includes a first optical substrate and at least one first filter corresponding to the emitting device; the first filter is arranged on the first optical substrate, and the first filter is used to allow only the emitting optical signal of a preset wavelength to enter the first optical substrate; The first optical substrate is used to combine the incoming transmitted optical signals and transmit them to the transceiver branch module.

14. The optical transceiver according to claim 1, characterized in that: The demultiplexing component includes a second optical substrate and at least one second filter corresponding to the receiving device, and the second filter is arranged on the second optical substrate; the second optical substrate is used to branch the incident light signal and send it to the second filter, and the second filter is used to allow only the received incident light signal of a preset wavelength to be emitted to the corresponding receiving device.

15. An optical line terminal, characterized in that: It comprises the optical transceiver device as claimed in any one of claims 1 to 14.

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