Light splitting assembly, signal transceiver and optical network

Abstract

The embodiment of the invention discloses a light splitting assembly, a signal transceiver and an optical network, and relates to the field of light. According to the specific scheme, the light splitting assembly comprises a transparent body, a first light filtering element and a first light reflecting element, the transparent body comprises a first surface, a second surface, a third surface and a fourth surface, and the first surface and the second surface are oppositely arranged and are not parallel; the third surface and the fourth surface are oppositely arranged. The first light filtering element is attached to the second surface and is used for transmitting a first light beam from the first surface and reflecting a second light beam from the first surface; the first light reflecting element is attached to the fourth surface and used for reflecting the second light beam. The light path in the transparent body is not influenced by the relative positions of the light splitting assembly and other components, and it is ensured that the light splitting assembly has a good light splitting effect. In addition, the relative position of the first light reflecting element and the first light filtering element does not need to be adjusted, and the installation and adjustment cost is reduced.

Description

Technical Field

[0001] The embodiments of the present application relate to the optical field, and in particular to a splitter component, a signal transceiver and an optical network. Background Art

[0002] Generally, the light splitting ability of a filter is an important indicator for determining the performance of the filter. The light splitting effect of a filter will directly affect the optical performance of the optical structure including the filter and affect the use of the optical structure. Therefore, how to improve the light splitting effect of a filter is an issue that needs to be solved urgently. Summary of the invention

[0003] The embodiments of the present application provide a splitter component, a signal transceiver and an optical network, which improve the problem of poor splitter effect of the filter.

[0004] In order to achieve the above-mentioned purpose, this application adopts the following technical solution.

[0005] In the first aspect, the embodiment of the present application provides a spectroscopic component. The spectroscopic component includes a transparent body, a first filter element and a first reflective element. The transparent body includes a first surface, a second surface, a third surface and a fourth surface. The first surface and the second surface are arranged oppositely and are not parallel, and the third surface and the fourth surface are arranged oppositely and are both located between the first surface and the second surface; the first surface is used to receive incident light, and the incident light includes a first light beam and a second light beam. The first filter element is attached to the second surface; it is used to transmit the first light beam from the first surface and reflect the second light beam from the first surface. The first reflective element is attached to the fourth surface; it is used to reflect the second light beam and make the reflected second light beam pass through the third surface. Since the first surface and the second surface are not parallel. When the light propagates to the first surface and the second surface in the same propagation direction, the incident angles incident to the first surface and the incident angles incident to the second surface are different. If the second surface is a reflective surface, the light will not return to the first surface in the direction opposite to the aforementioned propagation direction. Then the second light beam reflected by the first filter element has a different propagation direction from the light before it is incident to the first filter element. The second light beam is reflected by the first reflective element attached to the fourth surface, and can pass through the third surface located between the first surface and the second surface. The light path between the first filter element and the first reflective element is all in the transparent body. When the propagation direction of the light incident on the first surface is the same, the light path in the transparent body, the first reflective element and the first filter element is not affected by the relative position of the light splitting component and other components (such as the housing). Therefore, even if the processing accuracy of other components (such as the housing) is low, the light splitting component has a good light splitting effect. In addition, since the first reflective element and the first filter element are both connected to the transparent body, the relative position of the first reflective element and the first filter element is not affected by the processing accuracy of other components (such as the housing) and the adjustment accuracy of the light splitting component. It is ensured that the light splitting component has a better light splitting effect. In addition, the relative position of the first reflective element and the first filter element does not need to be adjusted, which reduces the cost of adjustment.

[0006] In combination with the first aspect, in some achievable ways, the light splitting component further comprises: a second filter element, which is used to transmit a portion of the second light beam from the third surface. The second filter element intercepts a portion of the second light beam, so that the wavelength of the light emitted by the second filter element is narrower, which is conducive to improving the light splitting efficiency of the light splitting component.

[0007] In combination with the first aspect, in some achievable manners, the second filter element is bonded to the second surface. The degree of freedom between the second filter element and the transparent body is reduced, the difficulty of assembling and adjusting the second filter element is reduced, and the assembling and adjusting cost is reduced. In addition, the spectral effect of the spectral component is prevented from being affected by the low assembling and adjusting accuracy of the second filter element and the transparent body.

[0008] In combination with the first aspect, in some achievable manners, the angle between the first surface and the second surface is in the range of 2° to 14°. When the light beam is incident perpendicular to the first surface and propagates to the second surface through the transparent body, the incident angle of the light propagating to the second surface is in the range of 2° to 14°. The smaller the incident angle, the better the spectroscopic accuracy of the first filter element, and the smaller the incident angle, the higher the spectroscopic accuracy.

[0009] In combination with the first aspect, in some achievable methods, the angle between the first surface and the second surface is 8°. When the light beam is incident perpendicular to the first surface, when it propagates to the second surface through the transparent body, the incident angle of the light propagating to the second surface is 8°, and the spectroscopic accuracy of the first filter element is better. Because the first reflective element needs to reflect the second light beam, the smaller the incident angle of the light incident to the second surface, the longer the propagation distance of the light from the first surface to the second surface and then to the first reflective element will be. That is, the volume of the spectroscopic component will increase. The incident angle is 8°, and the volume of the spectroscopic component is small.

[0010] In combination with the first aspect, in some achievable ways, the transparent body further comprises an assembly surface, the first surface, the second surface, the third surface and the fourth surface are all connected to the assembly surface; the first surface, the second surface, the third surface and the fourth surface are all perpendicular to the assembly surface. When the assembly surface is connected to other components (such as a housing), the relative positions of the first surface, the second surface, the third surface and the fourth surface and the other components (such as a housing) are fixed. There is a definite positional relationship between the first filter element and the first reflective element. The installation and adjustment cost of the light splitting component is reduced.

[0011] In conjunction with the first aspect, in some achievable manners, the first light-reflecting element is a total reflection filter. The total reflection filter can increase the reflectivity of the first light-reflecting element and reduce light loss.

[0012] In combination with the first aspect, in some achievable ways, the transparent body further includes a fifth surface, and opposite ends of the fifth surface are connected to the fourth surface and the third surface respectively. The transparent body is in the shape of a pentagonal prism. Compared with the fourth surface extending to connect with the second surface, the presence of the fifth surface reduces the volume of the transparent body.

[0013] In a second aspect, an embodiment of the present application provides a spectroscopic component. The spectroscopic component includes a third filter element, a second reflective element and a base. The third filter element is connected to the base, and the spectroscopic surface of the third filter element is perpendicular to the surface of the base close to the third filter element. The second reflective element is connected to the base, and the second reflective element and the third filter element are located on the same side of the base, and the reflective surface of the second reflective element is perpendicular to the surface of the base close to the third filter element; the second reflective element is used to reflect the second light beam. Since the third filter element and the second reflective element are both connected to the base. The relative position of the third filter element and the second reflective element is determined by the base. The optical path between the third filter element and the second reflective element is not affected by the processing accuracy of other components (such as a housing). Even if the processing accuracy and assembly accuracy of other components are low, the optical path in the spectroscopic component is not affected, so that the spectroscopic effect of the spectroscopic component is guaranteed.

[0014] In combination with the second aspect, in some achievable methods, the angle between the surface of the third filter element facing the second reflective element and the surface of the second reflective element facing the filter element is 30° to 50°. The path of light propagation between the second reflective element and the third filter element is related to the angle between the surface of the third filter element facing the second reflective element and the surface of the second reflective element facing the filter element. The larger the angle, the longer the propagation path and the smaller the volume of the spectroscopic component. If the angle is too small, the second reflective element may reflect the light back to the third filter element. Therefore, the angle is 30° to 50°, which can reduce the volume of the spectroscopic component while ensuring the operation of the spectroscopic component.

[0015] In a third aspect, an embodiment of the present application provides a signal transceiver, the signal transceiver comprising: a signal receiving component, a signal transmitting component, a signal transmission component and any one of the spectroscopic components provided in the first aspect or the second aspect. The signal transmission component is used to project the signal to be received to the spectroscopic component, the signal receiving component is used for the first target light beam and the second target light beam emitted by the spectroscopic component; the signal transmission component is also used to emit the light of the signal transmitting component. Since the spectroscopic component has a good spectroscopic effect. Therefore, the signal received by the signal receiving component is more accurate. The signal emitted by the signal transmitting component has little interference.

[0016] In conjunction with the third aspect, in some achievable ways, the signal transceiver further includes: a fourth optical filter element, which is used to transmit the light of the signal transmitting component to the signal transmission component; and is also used to reflect the signal to be received to the optical splitting component. The fourth optical filter element can split the light of the signal to be received and the light of the signal transmitting component to avoid crosstalk between the two.

[0017] In conjunction with the third aspect, in some achievable ways, the signal transceiver further comprises a first shell and a second shell connected to each other, the signal transmitting component is located in a sealed cavity of the first shell, the signal receiving component and the spectroscopic component are located in the second shell, and the signal transmission component is connected to the second shell. The signal transmitting component is located in the sealed cavity. Air or dust can be prevented from entering the sealed cavity and affecting the signal transmission component. The signal receiving component and the spectroscopic component are located in the second shell. Components that do not need to be located in the sealed cavity are located in the second shell. The volume of the sealed cavity can be reduced. The sealing cost is reduced.

[0018] In a fourth aspect, an embodiment of the present application provides an optical network, the optical network comprising: a line terminal and any one of the signal transceivers provided in the third aspect, the line terminal and the signal transceiver are signal-connected. Since the signal receiving component of the signal transceiver receives a more accurate signal, the signal emitted by the signal transmitting component has less interference. Therefore, the optical network operates more stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1a A schematic diagram of the optical path structure of a passive optical network.

[0020] Figure 1b A schematic diagram of the structure of a signal transceiver provided in an embodiment of the present application.

[0021] Figure 2 It is a structural schematic diagram of the splitting structure in the related technology.

[0022] Figure 3a A schematic diagram of the structure of a light splitting component provided in an embodiment of the present application.

[0023] Figure 3b A schematic diagram of the structure of another spectrometer provided in an embodiment of the present application.

[0024] Figure 3c A schematic diagram of the structure of another spectrometer provided in an embodiment of the present application.

[0025] Figure 4a A schematic diagram of the structure of another spectrometer provided in an embodiment of the present application.

[0026] Figure 4b A schematic structural diagram of a second filter element and a transparent body provided in an embodiment of the present application.

[0027] Figure 5 A schematic diagram of the structure of another spectrometer component provided in an embodiment of the present application.

[0028] Figure 6 A schematic structural diagram of a light splitting component provided in an embodiment of the present application.

[0029] Figure 7 A schematic diagram of the structure of another signal transceiver provided in an embodiment of the present application.

[0030] Figure 8 A schematic diagram of the structure of another signal transceiver provided in an embodiment of the present application.

[0031] In the figure: 01-spectrometric structure; 02-filter; 03-reflector; 04-assembly cavity; 10-signal transceiver; 11-signal transmission component; 12-signal transmission component; 13-signal receiving component; 100-spectrometric component; 110-first filter element; 120-transparent body; 121-first surface; 122-second surface; 123-third surface; 124-fourth surface; 125-fifth surface; 126-assembly surface; 130-first reflective element; 140-second filter element; 210-base Seat; 220-third filter element; 230-second reflective element; 250-fifth filter element; 240-fourth filter element; 101-first lens; 102-second lens; 103-third lens; 131-signal receiver; 170-seventh filter element; 160-sixth filter element; 180-eighth filter element; 012-signal transmitter; 201-isolator; 202-housing; 180-eighth filter element; 190-ninth filter element; 203-first shell; 204-second shell. DETAILED DESCRIPTION

[0032] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings.

[0033] In the following, the terms "first", "second", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0034] In addition, in the present application, directional terms such as "upper" and "lower" are defined relative to the orientation of the components in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, and they can change accordingly according to the changes in the orientation of the components in the drawings.

[0035] Figure 1a Figure 1 is a schematic diagram of the optical path structure of a passive optical network (PON). Figure 1aAs shown in Figure 1, a passive optical network system includes an optical line terminal (OLT) located in the central office, a passive optical splitter (POS) for branching / coupling, and several optical network units (ONUs). All optical fiber links from OLT to ONU are called optical delivery network (ODN). The direction from OLT to ONU is called the downstream direction, and the direction from ONU to OLT is called the upstream direction. In some scenarios, the optical line terminal also includes an optical network terminal (ONT), and multiple modes of ONT and OLT coexist.

[0036] The embodiment of the present application does not limit the type of passive optical network. For example, it can be a 50GPON (50gigabit-capable passive optical network) and 10GPON coexisting splitter component, or it can be a 50GPON, 10GPON and GPON coexisting splitter component. The size of the above two coexisting splitter components can meet the packaging requirements of a small form-factor pluggable module (SFP).

[0037] Among them, the combined optical splitter component (combo PON) integrates the transmitters and receivers of multiple PONs into a packaged optical splitter component. Exemplarily, the combined optical splitter component includes a signal transceiver, and the signal transceiver includes a signal transmitting component and a signal receiving component. The embodiment of the present application does not limit the number of signal transmitting components and signal receiving components in the signal transceiver. For example, the signal transceiver includes two signal transmitting components and two signal receiving components, or the signal transceiver includes a signal transmitting component and a signal receiving component, etc. As a single combined optical splitter component carries more and more transistor outline packages (TO) and signal bands, the difficulty of optical splitting and miniaturization is getting higher and higher.

[0038] Figure 1b The present invention provides a schematic diagram of the structure of a signal transceiver 10 provided in an embodiment of the present invention, wherein the signal transceiver 10 includes a signal transmission component 11, a signal emission component 12, a signal receiving component 13 and a light splitting component 100. The signal to be received is input from the signal transmission component 11, and then split by the light splitting component 100. The light beam split by the light splitting component 100 is propagated to the signal receiving component 13 and then received by the signal receiving component 13. The signal to be transmitted emitted by the signal emission component 12 is output from the signal transmission component 11.

[0039] The optical splitter component 100 includes a first optical filter element 110 , and the first optical filter element 110 obtains the signal received by the signal receiving component 13 from the signal to be received.

[0040] Figure 2 It is a structural schematic diagram of the light splitting structure 01 in the related art. Figure 2 In the embodiment, the light splitting structure 01 includes a filter 02 and a reflector 03. The light splitting structure 01 has an assembly cavity 04. The filter 02 and the reflector 03 are located in the assembly cavity 04 and are connected to the inner wall of the assembly cavity 04. Figure 2 As shown by the dotted arrow, the incident light is projected onto the filter 02, the filter 02 selects the light of the target band in the incident light, and transmits the light of the target band to the reflector 03, and the reflector 03 reflects and then continues to transmit to other components (such as other filters) in the spectroscopic structure 01.

[0041] The light-splitting ability of the filter 02 is strongly related to the angle between the incident light and the normal line, the coating process, the processing accuracy of the assembly cavity 04, the parallelism of the incident light, etc. Figure 2 In the example of FIG. 1 , the processing error of the assembly cavity 04 may cause the filter 02 to deviate from the ideal light splitting angle. The greater the processing error, the worse the light splitting effect of the filter 02.

[0042] Therefore, the light splitting component 100 provided in the embodiment of the present application can effectively improve the light splitting effect.

[0043] Figure 3a This is a schematic diagram of the structure of a light splitting component 100 provided in an embodiment of the present application. Figure 3a , the spectroscopic component 100 includes a transparent body 120, a first reflective element 130 and a first filter element 110. The transparent body 120 is an irregular shape. Among them, the transparent body 120 has a first surface 121, a second surface 122, a third surface 123 and a fourth surface 124. Among them, the first surface 121 and the second surface 122 are arranged opposite to each other, and the first surface 121 and the second surface 122 are not parallel. The third surface 123 and the fourth surface 124 are arranged opposite to each other, and the third surface 123 and the fourth surface 124 are both located between the first surface 121 and the second surface 122. The incident light includes a first light beam A and a second light beam B, and the first surface 121 receives the incident light and projects the incident light to the second surface 122.

[0044] The first surface 121 and the second surface 122 are arranged opposite to each other, and the first surface 121 and the second surface 122 are respectively located at opposite ends of the transparent body 120. The third surface 123 and the fourth surface 124 are arranged opposite to each other, and the third surface 123 and the fourth surface 124 are respectively located at opposite ends of the transparent body 120. It can be understood that the direction from the first surface 121 to the second surface 122 and the direction from the third surface 123 to the fourth surface 124 are not the same.

[0045] The first filter element 110 is attached to the second surface 122. The first filter element 110 transmits the first light beam A from the first surface 121 and reflects the second light beam B from the first surface 121. In other words, when the light from the first surface 121 propagates to the first filter element 110, the first light beam A passes through the first filter element 110, and the second light beam B is reflected by the first filter element 110. For the convenience of description, the light beam passing through the first surface 121 is defined as the third light beam C. It can be understood that the third light beam C is the aforementioned light beam incident on the first surface 121. That is, the third light beam C is split into the first light beam A and the second light beam B by the first filter element 110.

[0046] The first light reflecting element 130 is attached to the fourth surface 124 , and the first light reflecting element 130 reflects the second light beam B to transmit the second light beam B through the third surface 123 .

[0047] Since the first surface 121 and the second surface 122 are not parallel. When the light propagates to the first surface 121 and the second surface 122 in the same propagation direction, the incident angles of the first surface 121 and the second surface 122 are different. If the second surface 122 is a reflective surface, the light will not return to the first surface 121 in the direction opposite to the aforementioned propagation direction. In other words, the propagation direction of the second light beam B reflected by the first filter element 110 is different from that of the light before it is incident on the first filter element 110. The second light beam B is reflected by the first reflective element 130 attached to the fourth surface 124, and can pass through the third surface 123 located between the first surface 121 and the second surface 122. The optical path between the first filter element 110 and the first reflective element 130 is all within the transparent body 120. After the incident light is incident on the first surface 121, the optical paths within the transparent body 120, the first reflective element 130 and the first filter element 110 are not affected by the relative positions of the light splitting component 100 and other components (such as the housing). Therefore, even if the processing accuracy of other components is low, the spectroscopic component 100 also has a good spectroscopic effect. In addition, since the first reflective element 130 and the first filter element 110 are both connected to the transparent body 120, the relative position of the first reflective element 130 and the first filter element 110 is not affected by the processing accuracy of other components (such as the housing) and the adjustment accuracy of the spectroscopic component 100. It is ensured that the spectroscopic component 100 has a good spectroscopic effect. In addition, the relative position of the first reflective element 130 and the first filter element 110 is fixed, and the first reflective element 130 and the first filter element 110 have a small degree of freedom, which reduces the cost of adjustment.

[0048] The embodiment of the present application does not limit the manner in which the first filter element 110 and the second surface 122 are bonded. For example, the first filter element 110 and the second surface 122 are connected by an adhesive layer. Similarly, the embodiment of the present application does not limit the manner in which the first reflective element 130 and the fourth surface 124 are bonded. For example, the first reflective element 130 and the fourth surface 124 are connected by an adhesive layer.

[0049] As mentioned above, the first surface 121 and the second surface 122 are not parallel. In other words, the angle α between the first surface 121 and the second surface 122 is not 0°. In some embodiments of the present application, the angle α between the first surface 121 and the second surface 122 is 2° to 14°. For example, the angle α between the first surface 121 and the second surface 122 can be 2°, 4°, 5°, 6°, 8°, 9°, 10°, 11°, 12°, 13° or 14°, etc. Correspondingly, the angle between the normal of the first surface 121 and the normal of the second surface 122 is equal to the angle α. When the propagation direction of the third light beam C is perpendicular to the first surface 121. The incident angle of the third light beam C incident on the second surface 122 is equal to the angle α. A smaller incident angle is conducive to improving the splitting accuracy of the first filter element 110, and the smaller the incident angle, the higher the splitting accuracy. Because the first reflective element 130 needs to reflect the second light beam B reflected by the first filter element 110 , the smaller the incident angle to the second surface 122 is, the longer the propagation distance of the second light beam B from the first surface 121 to the second surface 122 and then to the first reflective element 130 will be.

[0050] In some embodiments, the angle α between the first surface 121 and the second surface 122 is 8°. Similarly, when the propagation direction of the third light beam C is perpendicular to the first surface 121. The incident angle of the third light beam C incident on the second surface 122 is 8°. The propagation distance of the second light beam B from the first surface 121 to the second surface 122 and then to the first reflective element 130 is short, and the volume of the spectroscopic component 100 is small. The incident angle is 8°, and the spectroscopic accuracy of the first filter element 110 is also better. Therefore, the angle α between the first surface 121 and the second surface 122 is 8°, and the spectroscopic component 100 has the advantages of both small volume and good spectroscopic effect.

[0051] like Figure 3a As shown, the first filter element 110 covers a portion of the second surface 122. The light passing through the first surface 121 propagates to a partial area of ​​the second surface 122. The first filter element 110 covers the aforementioned partial area, so that the third light beam C can be split into the first light beam A and the second light beam B. The remaining area of ​​the second surface 122 may not be covered by the first filter element 110. In this way, the area of ​​the first filter element 110 is small, so that the volume of the light splitting component 100 is small.

[0052] Alternatively, in other embodiments, the first filter element 110 may cover all areas of the second surface 122. During installation of the first filter element 110, the first filter element 110 may cover the entire second surface 122 indiscriminately, and the installation and adjustment process of the first filter element 110 is simple.

[0053] Accordingly, Figure 3aIn the example, the first reflective element 130 covers a portion of the fourth surface 124. Because the second light beam B covers a partial area of ​​the fourth surface 124. The first reflective element 130 covers the aforementioned partial area to reflect the second light beam B and change the propagation direction of the second light beam B. The remaining area of ​​the fourth surface 124 may not be covered by the first reflective element 130. In this way, the area of ​​the first reflective element 130 is smaller, so that the volume of the spectroscopic component 100 is smaller. Similarly, in other embodiments, the first reflective element 130 may cover all areas of the fourth surface 124. During the installation of the first reflective element 130, the first reflective element 130 may cover the entire fourth surface 124 indiscriminately, and the installation process is simple.

[0054] The embodiment of the present application does not limit the structure of the first filter element 110. For example, the first filter element 110 may be a filter. Alternatively, the first filter element 110 may be a wavelength division multiplexer (WDM).

[0055] The embodiment of the present application does not limit the structure of the first light-reflecting element 130. Exemplarily, the first light-reflecting element 130 is a total reflection filter. The total reflection filter can increase the reflectivity of the second light beam B, reduce the loss of the second light beam B, and reduce the loss of the optical signal. In other embodiments, the first light-reflecting element 130 can be a reflective film.

[0056] The angle between the reflective surface of the first reflective element 130 and the second surface 122 is related to the transmission path of the second light beam B. Therefore, the angle between the reflective surface of the first reflective element 130 and the second surface 122 can be set according to the transmission path of the second light beam B. The embodiment of the present application does not limit this. Because the first reflective element 130 and the fourth surface 124 are attached, when the second light beam B can be reflected by the first reflective element 130 and can pass through the third surface 123 after reflection, the embodiment of the present application does not limit the angle between the fourth surface 124 and the second surface 122.

[0057] Similarly, the third surface 123 is used to transmit the second light beam B reflected by the first reflective element 130. The positional relationship between the third surface 123 and the first surface 121, and the positional relationship between the third surface 123 and the second surface 122 are set according to the propagation path of the second light beam B, and the embodiment of the present application does not limit this. Then, the angle between the third surface 123 and the first surface 121, and the angle between the third surface 123 and the second surface 122 are set according to the propagation path of the second light beam B, and the embodiment of the present application does not limit this.

[0058] Figure 3aIn the embodiment, the transparent body 120 further includes an assembly surface 126, which is used to connect with other components (such as a housing) so that other components are connected to the spectroscopic component 100. The first surface 121, the second surface 122, the third surface 123 and the fourth surface 124 are all connected to the assembly surface 126. The first surface 121, the second surface 122, the third surface 123 and the fourth surface 124 are all perpendicular to the assembly surface 126. In this way, when the assembly surface 126 is connected to other components (such as a housing), the relative positions of the first surface 121, the second surface 122, the third surface 123 and the fourth surface 124 and the other components (such as a housing) are fixed. There is a definite positional relationship between the first filter element 110 and the first reflective element 130. The assembly and adjustment cost of the spectroscopic component 100 is reduced.

[0059] Figure 3a In the example, the transparent body 120 has two opposite mounting surfaces 126. The two mounting surfaces 126 are respectively located on opposite sides of the first surface 121. The two mounting surfaces 126 are parallel to each other. The spectroscopic component 100 can be connected to other components (such as a housing) through any one of the mounting surfaces 126. Alternatively, the spectroscopic component 100 can be connected to other components (such as a housing) through the two mounting surfaces 126.

[0060] In other embodiments, the transparent body 120 may have only one mounting surface 126. For example, the mounting surface 126 is located on one side of the transparent body 120, and the side of the transparent body 120 away from the mounting surface 126 may be a non-planar surface. Alternatively, in other embodiments, the first surface 121, the second surface 122, the third surface 123, and the fourth surface 124 may not be perpendicular to the mounting surface 126.

[0061] In the embodiment of the present application, the transparent body 120 further includes a fifth surface 125, and opposite ends of the fifth surface 125 are respectively connected to the fourth surface 124 and the second surface 122. The transparent body 120 is in the shape of a pentagonal prism. Compared with the fourth surface 124 extending to connect with the second surface 122, the presence of the fifth surface 125 reduces the volume of the transparent body 120.

[0062] The angle between the fifth surface 125 and other surfaces can be set arbitrarily without affecting the light path in the light splitting component 100. For example, the fifth surface 125 is parallel to the third surface 123.

[0063] Figure 3b A schematic diagram of the structure of another spectroscopic component 100 provided in an embodiment of the present application. Figure 3b and Figure 3a The difference is that the second surface 122 and the fifth surface 125 are different. Figure 3bIn the embodiment, the second surface 122 is covered by the entire first filter element 110. Along the direction from the first surface 121 to the second surface 122, the distance between the fifth surface 125 and the third surface 123 gradually decreases. Figure 3a Compared to the example, Figure 3b The volume of the light splitting component 100 is smaller.

[0064] or, Figure 3c A schematic diagram of the structure of another spectroscopic component 100 provided in an embodiment of the present application. Figure 3c and Figure 3a The difference is that Figure 3c In the example, the fourth surface 124 is connected to the second surface 122, and the transparent body 120 is in the shape of a quadrangular prism.

[0065] above Figure 3a , Figure 3b and Figure 3c The light splitting components 100 shown are only some examples. In other embodiments, the light splitting components 100 may be in the shape of a hexagonal prism or a heptagonal prism.

[0066] Figure 3a , the third light beam C is split by the first filter element 110 into a first light beam A and a second light beam B. It can be understood that the wavelength of the first light beam A is related to the filtering performance of the first filter element 110. The wavelength of the second light beam B is related to the third light beam C and the filtering performance of the first filter element 110. In some embodiments, the wavelength of some light in the second light beam B may be equal to the wavelength of the first light beam A. In some embodiments, the part of light in the second light beam B that is equal to the wavelength of the first light beam A may be filtered again.

[0067] Figure 4a A schematic structural diagram of another spectroscopic component 100 provided in an embodiment of the present application. Figure 4a and Figure 3a The difference is that the spectroscopic component 100 also includes a second filter element 140. The second filter element 140 is opposite to the third surface 123, and the second filter element 140 is used to transmit part of the second light beam B from the third surface 123. For the convenience of description, the light beam transmitted by the second filter element 140 is defined as the fourth light beam D. Then, the fourth light beam D is a part of the second light beam B. The second filter element 140 transmits the fourth light beam D and intercepts the remaining part of the second light beam B. For example, the second filter element 140 intercepts the part with the same wavelength as the first light beam A, so that the wavelength of the fourth light beam D is narrower. It is beneficial to improve the efficiency of the spectroscopic component 100.

[0068] The embodiment of the present application does not limit the wavelengths of the third light beam C, the fourth light beam D and the first light beam A. Exemplarily, the third light beam C includes signal lights with wavelengths of 1286nm and 1270nm. The first light beam A is a signal light with a wavelength of 1286nm. The fourth light beam D is a signal light with a wavelength of 1270nm. It is understandable that the fourth light beam D is not limited to single-wavelength light. For example, the third light beam C includes signal lights with wavelengths of 1286nm, 1270nm and 1310nm. The first light beam A is a signal light with a wavelength of 1286nm. The fourth light beam D is a signal light with wavelengths of 1270nm and 1310nm.

[0069] The embodiment of the present application does not limit the connection relationship between the second filter element 140 and the transparent body 120. In some embodiments, the second filter element 140 and the transparent body 120 are independently provided with a gap therebetween.

[0070] Figure 4b A schematic structural diagram of a second filter element 140 and a transparent body 120 provided in an embodiment of the present application. Figure 4b In the example of FIG. 1 , the second filter element 140 is connected to the transparent body 120. The degree of freedom between the second filter element 140 and the transparent body 120 is reduced, the difficulty of assembling and adjusting the second filter element 140 is reduced, and the assembling and adjusting cost is reduced. In addition, the spectral effect of the spectral component 100 is prevented from being affected by the low assembling and adjusting accuracy of the second filter element 140 and the transparent body 120.

[0071] Figure 4a and Figure 4b In the example, the structure of the transparent body 120 is Figure 3a It is understood that the structure of the transparent body 120 is Figure 3b , Figure 3c In the example shown, a second filter element 140 may also be provided, which will not be described in detail here.

[0072] Please also read Figure 3a , Figure 3b and Figure 3c , the light enters the transparent body 120 from the first surface 121 and propagates in the transparent body 120. It is understood that in some embodiments, the light can propagate in other media (such as air). Figure 5 An exemplary description is given.

[0073] Figure 5 A schematic structural diagram of another spectroscopic component 100 provided in an embodiment of the present application. Figure 5In the embodiment, the spectroscopic component 100 includes a base 210, a third filter element 220 and a second reflective element 230. The third filter element 220 is used to transmit the fifth light beam E from the incident light G and reflect the sixth light beam F from the incident light. In other embodiments, the fifth light beam E can also be defined as the first light beam. The sixth light beam F can also be defined as the second light beam. The second reflective element 230 reflects the sixth light beam F to change the transmission direction of the sixth light beam F. The third filter element 220 and the second reflective element 230 are both connected to the base 210. The third filter element 220 and the second reflective element 230 are both perpendicular to the surface of the base 210 close to the third filter element 220.

[0074] Since the third filter element 220 and the second reflective element 230 are both connected to the base 210, the relative positions of the third filter element 220 and the second reflective element 230 are determined by the base 210. The optical path between the third filter element 220 and the second reflective element 230 is not affected by the processing accuracy of other components (such as the housing). Even if the processing accuracy and assembly accuracy of other components are low, the optical path in the light splitting component 100 is not affected, so that the light splitting effect of the light splitting component 100 is guaranteed.

[0075] Accordingly, the embodiment of the present application does not limit the shape of the base 210. Figure 5 In the embodiment, the incident light G is transmitted from the air medium to the third filter element 220, and the third filter element 220 splits the incident light G into a fifth light beam E and a sixth light beam F. The sixth light beam F is transmitted from the air medium to the second reflective element 230, and the second reflective element 230 changes the transmission direction of the sixth light beam F and continues to transmit it in the air medium. Therefore, the embodiment of the present application does not limit the light transmittance of the base 210. For example, the base 210 may have light transmittance. The base 210 may also not have light transmittance.

[0076] The embodiment of the present application does not limit the structure of the second light reflecting element 230. For example, the second light reflecting element 230 may be a total reflection filter. The total reflection filter may enhance the reflectivity of the second light reflecting element 230 to the sixth light beam F and reduce the loss of the sixth light beam F.

[0077] and Figure 4a Similarly to the example, in some embodiments, the light emitted by the second reflective element 230 can be further filtered by a filter element.

[0078] For example, Figure 6 A schematic structural diagram of a light splitting component 100 provided in an embodiment of the present application. Figure 6 and Figure 5 The difference is that Figure 6In the embodiment, the spectroscopic component 100 further includes a fifth filter element 250. The fifth filter element 250 is connected to the base 210. The fifth filter element 250 is used to transmit the seventh light beam H from the sixth light beam F. Exemplarily, the second reflective element 230 reflects the sixth light beam F to the fifth filter element 250, and the fifth filter element 250 intercepts part of the light in the sixth light beam F and transmits the seventh light beam H in the sixth light beam F. The fifth filter element 250 intercepts the part of the sixth light beam F that is equal to the wavelength of the fifth light beam E, so that the wavelength in the seventh light beam H is narrower. This is conducive to improving the spectroscopic efficiency of the spectroscopic component 100. In addition, the fifth filter element 250, the third filter element 220 and the second reflective element 230 are all connected to the base 210.

[0079] It is understandable that in other examples, the fifth filter element 250 may not be connected to the base 210 . For example, the fifth filter element 250 and the base 210 are independently provided, and the fifth filter element 250 is located at the light exiting side of the second reflective element 230 .

[0080] Further, in order to reduce the volume of the light splitting component 100, the second reflective element 230 and the third filter element 220 are made more compact. At the same time, the light splitting component 100 is ensured to have an excellent light splitting effect. The angle β between the surface of the second reflective element 230 facing the third filter element 220 and the surface of the third filter element 220 facing the second reflective element 230 is 30° to 50°. Alternatively, the angle β between the reflection surface of the second reflective element 230 and the light splitting surface of the third filter element 220 is 30° to 50°. When the angle β is within the above range, the path of light propagation between the second reflective element 230 and the third filter element 220 is shorter, and the space between the second reflective element 230 and the third filter element 220 is smaller. The volume of the light splitting component 100 can be reduced. Exemplarily, the aforementioned β is 30°, 35°, 40°, 42°, 43°, 45°, 47°, 49° or 50°, etc.

[0081] Please return to Figure 1b As shown, the signal transceiver 10 further includes a fourth filter element 240, which is used to transmit the signal to be transmitted and to transmit the signal to be received. In other words, the fourth filter element 240 is used to transmit the signal to be transmitted to the signal transmission component 11. The fourth filter element 240 is also used to reflect the signal to be received from the signal transmission component 11 to the optical splitting component 100. In this way, the fourth filter element 240 can prevent the signal to be transmitted and the signal to be received from interfering with each other, which affects the subsequent optical splitting effect of the optical splitting component 100.

[0082] Exemplarily, the signal transceiver 10 further includes a first lens 101, which is located at one side of the signal transmission component 11. The signal to be received is input from the signal transmission component 11 and then collimated by the first lens 101. The signal to be transmitted is focused after passing through the first lens 101 and then output from the signal transmission component 11.

[0083] Exemplarily, the signal transceiver 10 further includes a sixth filter element 160, which is used to reflect the signal to be received from the fourth filter element 240. And project the signal to be received to the optical splitter component 100. Exemplarily, the sixth filter element 160 can be a total reflection filter. Alternatively, in some embodiments, the sixth filter element 160 can be a total reflection filter.

[0084] In some embodiments, the fourth filter element 240 and the sixth filter element 160 may be connected to form an integrally formed part, for example, connected to form a wavelength division multiplexing prism.

[0085] The embodiment of the present application does not limit the structure of the signal transmission component 11. In some embodiments, the signal transmission component 11 includes a fiber optic adapter. In other embodiments, the signal transmission component 11 includes a fiber optic adapter and an optical fiber. The optical fiber is connected to the fiber optic adapter.

[0086] The present application embodiment does not limit the structure of the signal receiving component 13. For example, the signal receiving component 13 includes a seventh filter element 170, a second lens 102, and a signal receiver 131. The light emitted by the light splitting component 100 passes through the seventh filter element 170 and the second lens 102 in sequence and is received by the signal receiver 131. Figure 3a Taking the light splitting component 100 in FIG. 1 as an example, the first light beam A emitted by the light splitting component 100 is sequentially transmitted through the seventh filter element 170 and the second lens 102 to be received by the signal receiver 131. The seventh filter element 170 can further narrow the wavelength of the light in the first light beam A, so that the signal received by the signal receiver 131 is more accurate.

[0087] The embodiment of the present application does not limit the number of the seventh filter element 170. For example, the number of the seventh filter element 170 can be one, two or more. The more the number of the seventh filter element 170 is, the higher the light splitting efficiency is. In some embodiments, the second lens 102 and the signal receiver 131 can be connected as an integral molding.

[0088] Figure 1b In the example of , the second lens 102 and the signal receiver 131 are independently provided. In some embodiments, the second lens 102 and the signal receiver 131 can be connected to each other to increase the integration of the signal receiver 131. Alternatively, in some embodiments, the seventh filter element 170 can also be integrated with the signal receiver 131.

[0089] Figure 1b In the example, the signal receiving component 13 has two components, one of which is used to receive a portion of the light beam emitted by the light splitting component 100. The other signal receiving component 13 is used to receive the remaining light beam emitted by the light splitting component 100. Figure 3a In the example shown, one signal receiving component 13 is used to receive the first light beam A, and another signal receiving component 13 is used to receive the second light beam B emitted by the light splitting component 100. Figure 4a In the example shown, one signal receiving component 13 is used to receive the first light beam A, and another signal receiving component 13 is used to receive the fourth light beam D emitted by the light splitting component 100 .

[0090] The embodiment of the present application does not limit the structure of the signal transmission component 12. For example, the signal transmission component 12 includes a signal transmitter 012 and a third lens 103. The signal transmitter 012 emits an optical signal, and the third lens 103 shapes (for example, converges) the signal light. The signal emitted by the third lens 103 is transmitted to the signal transmission component 11.

[0091] Accordingly, the signal transmitter 012 and the third lens 103 may be independently provided, or the signal transmitter 012 and the third lens 103 may be integrated together.

[0092] Exemplarily, in some embodiments, the signal transceiver 10 further includes an eighth filtering element 180. The eighth filtering element 180 filters the signal emitted by the third lens 103, and the signal light emitted by the eighth filtering element 180 is a target light beam.

[0093] Exemplarily, in some embodiments, the signal transceiver 10 further includes an isolator 201, and the signal light emitted by the eighth filter element 180 passes through the isolator 201 and is projected to the signal transmission component 11. The isolator 201 can allow the light propagating toward the signal transmission component 11 to pass through, while isolating the light propagating in the opposite direction to the signal transmission component 11. The influence of the light propagating in the opposite direction to the signal transmission component 11 on the signal transceiver 10 is avoided.

[0094] Figure 1b In the example, there are two signal transmitting components 12, and the two signal transmitting components 12 are respectively used to transmit signal lights of different wavelengths. The two signal lights are both transmitted through the eighth filter element 180. In the embodiment where the signal transceiver 10 includes an isolator 201, the signal lights emitted by the two signal transmitting components 12 are both projected to the signal transmission component 11 after passing through the isolator 201.

[0095] In other embodiments, the number of the signal transmitting components 12 may be one, three, four or more. Correspondingly, the number of the signal receiving components 13 may also be one, three, four or more. This embodiment of the application does not limit this.

[0096] In the embodiment where there are two signal transmitting components 12 , the structures of the two signal transmitting components 12 may be the same or different.

[0097] The embodiment of the present application does not limit the relative positions of the two signal transmitting components 12 and the two signal receiving components 13. For example, the two signal transmitting components 12 are located at one end of the signal transceiver 10 away from the signal transmission component 11. The two signal receiving components 13 are distributed on both sides of the signal transceiver 10, and the two signal receiving components 13 are located between the signal transmitting component 12 and the signal transmission component 11. In this way, the volume of the signal transceiver 10 can be reduced and the compactness of the signal transceiver 10 can be improved.

[0098] It is understandable that in other embodiments, the two signal transmitting components 12 and the two signal receiving components 13 may not be used. Figure 1b The distribution shown.

[0099] Figure 1b In the embodiment, the signal transceiver 10 further includes a housing 202, two signal transmitting components 12 and two signal receiving components 13 are both located in the housing 202, and the two signal transmitting components 12 and the two signal receiving components 13 are both connected to the housing 202. The signal transmission component 11 passes through the housing 202.

[0100] The embodiment of the present application does not limit the wavelength of the signal received and transmitted by the signal transceiver 10. For example, a mixed signal with a wavelength of 1286nm and 1270nm is input from the signal transmission component 11. After passing through the first lens 101, the fourth filter element 240, the sixth filter element 160 and the spectroscopic component 100, it is divided into a light beam with a wavelength of 1286nm and a light beam with a wavelength of 1270nm. The light beam with a wavelength of 1286nm and the light beam with a wavelength of 1270nm are received by two signal receiving components 13 respectively. After filtering by the fourth filter element 240 and the sixth filter element 160, the spectroscopic component 100 can achieve high-precision spectrometry. Two signals with a wavelength difference of 4nm can be received separately. For example, two signals with a wavelength of 1286±2nm and a wavelength of 1270±10nm can be received separately. Among them, the seventh filter element 170 in the signal receiving component 13 further separates the light beam, and after removing the stray light, it is converged to the signal receiver 131 by the second lens 102.

[0101] The signal light emitted by the signal transmitter 012 is collimated by the third lens 103 and then emitted to the eighth filter element 180. The eighth filter element 180 combines the light and then passes through the isolator 201 and the fourth filter element 240 and then projects it to the first lens 101. The first lens 101 shapes the light and then transmits it to the signal transmission component 11 for emission.

[0102] In some embodiments, the two signal receiving components 13 may also be different. Figure 7 A schematic diagram of the structure of another signal transceiver 10 provided in an embodiment of the present application. Figure 7 and Figure 1b The difference is that one signal receiving component 13 receives signals of one wavelength, while the other signal receiving component 13 receives signals of two wavelengths.

[0103] Figure 7 In the embodiment, the signal receiving component 13 includes two seventh filter elements 170 and two signal receivers 131. The two signal receivers 131 receive signal lights of different wavelengths respectively. Exemplarily, after the light output by the optical splitting component 100 passes through a seventh filter element 170, a part of the light passes through the seventh filter element 170, and a part of the light is reflected by the seventh filter element 170. The part that passes through the seventh filter element 170 is transmitted to a signal receiver 131 and received. The signal light reflected by the seventh filter element 170 is transmitted to another signal receiver 131 and received after passing through another seventh filter element 170.

[0104] Figure 7 In the embodiment, one signal receiving component 13 includes two signal receivers 131, and the other signal receiving component 13 includes one signal receiver 131. It is understandable that in other embodiments, the two signal receiving components 13 may each include two signal receivers 131. The embodiment of the present application does not limit this.

[0105] Figure 7 In the example, one signal receiving component 13 is used to receive signal light with wavelengths of 1270nm and 1310nm. Another signal receiving component 13 is used to receive signal light with a wavelength of 1286nm. Since the optical splitting component 100 provided in the embodiment of the present application has excellent optical splitting performance. Even if there is wavelength broadening and wavelength drift, the signal transceiver 10 can also receive light with a wavelength difference of 4nm respectively, for example, light with wavelengths of 1286nm and 1270nm can be received by different signal receivers 131.

[0106] Figure 7 In the embodiment, there are three signal emitting components 12. The three signal emitting components 12 emit different signal lights respectively.

[0107] Figure 7In the embodiment, the signal transceiver 10 further includes a ninth filter element 190 , which is used to combine the signal lights emitted by the two signal emission components 12 and project them to the signal transmission component 11 after the combination.

[0108] Figure 7 In the example of FIG. 1 , the three signal transmitting components 12 respectively transmit signal lights with wavelengths of 1342 nm, 1577 nm, and 1490 nm. Therefore, the signal lights transmitted by the signal transceiver 10 include signal lights with wavelengths of 1342 nm, 1577 nm, and 1490 nm.

[0109] and Figure 6 The same is true for the example in Figure 7 The signal transceiver 10 in the embodiment also includes a housing 202, three signal transmitting components 12 and two signal receiving components 13 are all located in the housing 202, and the signal transmission component 11 runs through the housing 202. In order to prevent air or water vapor from entering the housing 202 and affecting the performance of the signal receiver 131 and the signal transmitter 012. In some embodiments, the housing 202 has better sealing performance. In other words, the housing 202 has a sealed cavity, and the signal transmitting component 12 and the signal receiving component 13 are located in the sealed cavity. Alternatively, in some embodiments, a sealing structure can be set outside the signal transmitter 012 to prevent air or water vapor from affecting the signal transmitter 012. Accordingly, in some embodiments, a sealing structure can be set outside the signal receiver 131 to prevent air or water vapor from affecting the signal receiver 131.

[0110] Figure 8 A schematic diagram of the structure of another signal transceiver 10 provided in an embodiment of the present application. Figure 8 and Figure 7 The difference lies in the shell structure. Figure 8 In the example, the signal transceiver 10 includes a first housing 203 and a second housing 204. The signal transmitting component 12 is located in the sealed cavity of the first housing 203. The signal receiving component 13 and the light splitting component 100 are located in the second housing 204, and the signal transmission component 11 is connected to the second housing 204.

[0111] Since the first shell 203 includes a sealed cavity, and the signal transmitting component 12 is located in the sealed cavity. All devices in the signal transmitting component 12 are located in the sealed cavity. It is not necessary to package each component in the signal transmitting component 12 separately, shortening the packaging process and reducing the packaging time. In an embodiment in which there are multiple signal transmitting components 12, multiple signal transmitting components 12 are all located in the first shell 203. Similarly, each signal transmitting component 12 does not need to be packaged and assembled separately. The space occupied by multiple signal transmitting components 12 can be reduced. The compactness of the signal transceiver 10 is improved.

[0112] Figure 8 In the example of FIG. 1 , the signal receiver 131 is packaged separately. The cavity inside the second housing 204 may not be a sealed cavity. The cost of the second housing 204 can be reduced. Alternatively, in some embodiments, multiple signal receivers 131 may be packaged in a sealed cavity inside the second housing 204. The present application embodiment does not limit this.

[0113] Since the spectroscopic component 100 has excellent spectroscopic performance, the signal received in the signal transceiver 10 is not easily interfered with. The signal received by the signal transceiver 10 is more accurate. In addition, the optical path inside the spectroscopic component 100 is not affected by other components of the signal transceiver 10 (such as the signal transmission component 11). The spectroscopic component 100 has excellent spectroscopic performance. The spectroscopic performance of the spectroscopic component 100 is not affected by the arrangement of other components. The various components in the signal transceiver 10 have a variety of arrangement methods to choose from. With more layout methods, a layout method that miniaturizes the signal transceiver 10 can be selected.

[0114] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A light splitting component, characterized in that: The light splitting component comprises: A transparent body, the transparent body comprising a first surface, a second surface, a third surface and a fourth surface, the first surface and the second surface are arranged opposite to each other and are not parallel, the third surface and the fourth surface are arranged opposite to each other, and the third surface and the fourth surface are both located between the first surface and the second surface; the first surface is used to receive incident light, and the incident light comprises a first light beam and a second light beam; a first filter element, attached to the second surface, and configured to transmit the first light beam from the first surface and reflect the second light beam from the first surface; and The first reflective element is attached to the fourth surface and is used for reflecting the second light beam and allowing the reflected second light beam to pass through the third surface.

2. The light splitting component according to claim 1, characterized in that: The light splitting component further includes: a second filter element, which is used to transmit a portion of the second light beam from the third surface.

3. The light splitting component according to claim 2, characterized in that: The second filter element is attached to the third surface.

4. The light splitting component according to any one of claims 1 to 3, characterized in that: The angle between the first surface and the second surface ranges from 2° to 14°.

5. The light splitting component according to any one of claims 1 to 4, characterized in that: The transparent body further comprises an assembly surface, the first surface, the second surface, the second surface and the fourth surface are all connected to the assembly surface; the first surface, the second surface, the second surface and the fourth surface are all perpendicular to the assembly surface.

6. The light splitting component according to any one of claims 1 to 5, characterized in that: The transparent body further includes a fifth surface, and opposite ends of the fifth surface are respectively connected to the fourth surface and the second surface.

7. A light splitting component, characterized in that: The light splitting component comprises: Pedestal; A third filter element is connected to the base, wherein a light splitting surface of the third filter element is perpendicular to a surface of the base close to the third filter element; and A second reflective element is connected to the base. The second reflective element and the third filter element are located on the same side of the base. The reflective surface of the second reflective element is perpendicular to the surface of the base close to the third filter element. The second reflective element is used to reflect the second light beam.

8. The light splitting component according to claim 7, characterized in that: The angle between the light-splitting surface of the third filter element and the light-reflecting surface of the second light-reflecting element is in the range of 30° to 50°.

9. A signal transceiver, characterized in that: The signal transceiver comprises: a signal receiving component, a signal transmitting component, a signal transmission component and the optical splitting component according to any one of claims 1 to 8; The signal transmission component is used to project the signal to be received to the light splitting component, and the signal receiving component is used to receive the first target light beam and the second target light beam emitted by the light splitting component; The signal transmission component is also used to emit the light of the signal emission component.

10. The signal transceiver according to claim 9, characterized in that: The signal transceiver further includes: a fourth filter element, which is used to transmit the light of the signal transmitting component to the signal transmission component; and is also used to reflect the signal to be received to the light splitting component.

11. The signal transceiver according to claim 9 or 10, characterized in that: The signal transceiver also includes a first shell and a second shell connected to each other, the signal transmitting component is located in the sealed cavity of the first shell, the signal receiving component and the light splitting component are located in the second shell, and the signal transmission component is connected to the second shell.

12. An optical network, characterized in that: The optical network comprises: a line terminal and a signal transceiver according to any one of claims 9 to 11, wherein the line terminal and the signal transceiver are signal-connected.

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