Z-Block assembly and optical device
By designing Z-Block components with common ports and specific reflection paths, the problem that traditional Z-Block components cannot adapt to different beam spacings has been solved, achieving high integration and compactness of optical devices.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- O NET COMM (SHENZHEN) LTD
- Filing Date
- 2025-12-30
- Publication Date
- 2026-04-10
AI Technical Summary
Traditional Z-Block components cannot simultaneously adapt to the different beam spacing requirements of the transmitter and receiver, resulting in complex optical device structures and large sizes, making it difficult to meet the demands of high speed, high density, and miniaturization.
Design a Z-Block component that uses a common port, first and second prisms, demultiplexing and multiplexing filter groups, and first and second reflectors to achieve bidirectional optical path transmission at the transmitting and receiving ends through different filter spacings and reflection paths.
It achieves bidirectional optical path transmission with the same common port, adapts to the mixed beam spacing of the transmitting and receiving ends, improves the degree of integration, and reduces the size and complexity of optical devices.
Smart Images
Figure CN121832025A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of optical communication device technology, and in particular to a Z-Block component and optical device. Background Technology
[0002] In high-speed optical communication systems, especially in data center interconnects and telecommunications backbone networks, wavelength division multiplexing (WDM) technology is a core means of improving the transmission capacity of a single optical fiber. Based on Z-Block components, this technology is widely used to implement multiplexing and demultiplexing functions in optical modules due to its advantages such as low insertion loss, high channel isolation, and compact structure.
[0003] Traditional Z-Block components typically employ a single, fixed internal optical path design. All internal filters must share the same Z-shaped reflection path (e.g., ...). Figure 1 As shown in B), this results in the passage of each filter (such as...) Figure 1 As shown in Figure C, the beam spacing between the output or input channels must be consistent. However, in real-world optical device design, due to limitations in physical structure, heat dissipation, and manufacturing processes, the physical beam spacing requirements for the transmitter and receiver often differ. The transmitter laser requires independent driving and heat dissipation, resulting in a typically larger chip size and spacing; while the receiver detector can achieve higher integration density, leading to a typically smaller spacing. Traditional single-spacing Z-Blocks cannot simultaneously accommodate both transmitter and receiver standards.
[0004] To achieve bidirectional transmission within a single optical device—that is, to simultaneously handle transmit multiplexing and receive demultiplexing—existing technologies typically employ two independent Z-Block components with different beam spacings, serving the transmitter and receiver respectively. This combination of discrete components results in complex optical device structures and large sizes, making it difficult to meet the urgent demands of modern optical modules for higher speeds, higher densities, and miniaturization. Summary of the Invention
[0005] This invention provides a Z-Block component and optical device to solve the problem that the existing Z-Block component cannot adapt to different transmit and receive end spacing, resulting in large size and poor integration of the optical device.
[0006] This invention discloses a Z-Block component having a common port for receiving and transmitting beams in a first direction, and further comprising: First prism; The second prism is disposed on one side of the first prism in the first direction; A filtering component is disposed on the side of the first prism away from the second prism; the filtering component includes a wave-splitting filter group and a wave-combining filter group arranged along a second direction; the wave-splitting filter group includes a plurality of first filters; the wave-combining filter group includes a plurality of second filters; the plurality of first filters and the plurality of second filters are respectively arranged at equal intervals in the second direction; the spacing between adjacent first filters is different from the spacing between adjacent second filters; both the first filters and the second filters are used to transmit light beams of a specific wavelength and reflect light beams of other wavelengths; A first reflector is disposed between the first prism and the second prism, and corresponds to the remaining first filters except for the first filter that is far away from the wave combiner filter group, for sequentially reflecting the light beam incident at the common port multiple times between adjacent first filters. The second reflector is disposed on the side of the second prism away from the first prism and corresponds to the beam combining filter group. The adjacent first filter and the second filter are located in the refraction direction of the second reflector, so as to reflect the remaining wavelength beam multiple times between the adjacent second filters in sequence, and then combine the beam through the first filter and the first reflector, and emit it from the common port.
[0007] In one embodiment, the first prism includes a first surface and a second surface disposed opposite to each other in the first direction, the first surface and the second surface being parallel to each other, the first surface being disposed at an angle to the first direction, and the first surface being equipped with a wave splitter filter group and a wave combiner filter group; the second prism includes a third surface and a fourth surface disposed opposite to each other in the first direction, the third surface, the fourth surface and the second surface being parallel to each other, the third surface and the second surface being disposed opposite to each other, one of the third surface and the second surface being provided with the first reflector, and the fourth surface being provided with the second reflector.
[0008] In one embodiment, the first reflective element is a reflective film, which is adhered to one of the second prism or the first prism; and / or, the second reflective element is a reflective film, which is adhered to the second prism.
[0009] In one embodiment, the common port includes a transmitter and a receiver spaced apart in the second direction, the transmitter being located in the transmission direction of the first filter away from the multiplexing filter group, and the receiver being located in the refraction direction of the first filter away from the multiplexing filter group.
[0010] In one embodiment, both the first filter and the second filter are filter films, and the filter films are attached to the first prism.
[0011] In one embodiment, two first reflectors are provided, and the two first reflectors are located on both sides of the second filter assembly in the second direction.
[0012] In one embodiment, photosynthetic adhesive is used to fill the space between the first prism and the second prism.
[0013] In one embodiment, two of each of the first and second filter sheets are provided, and the spacing between adjacent second filter sheets is greater than the spacing between adjacent first filter sheets.
[0014] The present invention also discloses an optical device comprising the Z-Block component described in the above embodiments.
[0015] In one embodiment, the system further includes a collimating lens array, which includes a plurality of collimating portions, some of which correspond one-to-one with the positions of a plurality of first filter elements, and another portion of which correspond one-to-one with the positions of a plurality of second filter elements.
[0016] The beneficial effects of the Z-Block component provided in this embodiment of the invention are as follows: The Z-Block component can perform bidirectional optical path transmission through the same common port, which includes a wavelength division optical path and a wavelength combination optical path. The composite beam incident from the common port first enters the wavelength division optical path composed of a first reflector and multiple first filters. All the first filters are arranged with a uniform first spacing, so that the beam can be reflected multiple times sequentially between them, and each first filter transmits a beam of a specific wavelength, ultimately achieving wavelength division of the composite beam. For the wavelength combination optical path, by adding a second prism and a second reflector, the reflection path of the wavelength combination optical path is different from that of the wavelength division optical path, so that multiple beams of specific wavelengths to be combined can enter each of the second filters of the wavelength combination filter group with different second spacings, and are reflected multiple times sequentially between adjacent second filters by the second reflector. At the same time, the second reflector can also guide beams of different wavelengths to the wavelength division filter group. The beams of different wavelengths are thus transferred to the specific reflection path composed of the first reflector and multiple first filters, and are reflected multiple times along this specific reflection path, and finally output from the same common port. It is evident that this single Z-Block component can adapt to the mixed beam spacing of the transmitting and receiving ends, realizing bidirectional transmission functions of beam splitting and beam combining, with higher integration and a more compact structure. Attached Figure Description
[0017] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. In the accompanying drawings: Figure 1 This is a schematic diagram of the structure of a Z-Block component in the prior art; Figure 2This is a schematic diagram of one embodiment of the Z-Block component provided in this invention, in which two first filters and two second filters are provided. Figure 3 This is a schematic diagram of another embodiment of the Z-Block component provided in this invention, in which three first filters and three second filters are provided.
[0018] The labels for the attached figures are as follows: 1000, Z-Block assembly; 10, First prism; 11, First facet; 12, Second facet; 20, Second prism; 21, Third facet; 22, Fourth facet; 30, Filter assembly; 31, Wavelength splitter filter group; 311, First filter; 32, Wavelength combiner filter group; 321, Second filter; 40, First reflector; 50, Second reflector; 60, Common port; 61, Transmitter; 62, Receiver. Detailed Implementation
[0019] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
[0020] In optical communication systems, wavelength division multiplexing (WDM) schemes based on Z-Block components are commonly used at the transmitting and receiving ends to improve fiber optic transmission efficiency. The core principle is to combine optical signals of multiple wavelengths into a single optical fiber for transmission. Specifically, refer to... Figure 1 At the transmitting end, beams of different wavelengths are first coupled to the Z-Block assembly. The beams then pass through prisms (such as...) inside the Z-Block assembly. Figure 1 As shown in A) along the Z-shaped path (as shown in A) Figure 1 As shown in B), it passes through filters arranged at specific intervals (such as...). Figure 1 (as shown in C) and the reflective film (such as Figure 1 The function of (as shown in D) ultimately originates from a common port (such as...) Figure 1(As shown in COM) The receiver operates on the opposite principle: the combined light input from the common port is separated into beams of different wavelengths through the internal path and filters of the Z-Block component 1000, and then directed to their respective detectors. Due to differences in structure and manufacturing processes, the transmitter and receiver have different requirements for the beam spacing of different wavelengths. The laser at the transmitter requires independent driving, heat dissipation, and packaging to prevent crosstalk and thermal management issues, resulting in a typically larger chip size and relatively lower integration, thus requiring a larger physical spacing. In contrast, the detector units at the receiver can be made smaller and denser, with higher integration, allowing for a smaller physical spacing. Traditional single-spacing Z-Blocks, however, require all internal filters to share the same fixed reflection path, necessitating consistent beam spacing for different wavelength channels, making it impossible to simultaneously accommodate the different spacing requirements of the transmitter and receiver. Existing solutions often force the use of two Z-Block components with different beam spacings to serve the transmitter and receiver functions respectively. This approach results in optical communication devices being implemented using multiple discrete components, leading to system complexity, high cost, and increased size.
[0021] To address the aforementioned technical problems, embodiments of the present invention provide a Z-Block component 1000, such as... Figure 2 As shown, the Z-Block component 1000 has a first direction (e.g., Figure 2 The Z-Block assembly 1000 includes a common port 60 for receiving and transmitting beams on the X-shaped part of the Z-Block assembly 1000. The assembly also includes a first prism 20, a filter assembly 30, a first reflector 40, and a second reflector 50. The second prism 20 is located on one side of the first prism 10 in a first direction. The filter assembly 30 is located on the side of the first prism 10 away from the second prism 20. The filter assembly 30 includes components along a second direction (e.g., X in the image). Figure 2The image shows a wavelength division filter group 31 and a wavelength combination filter group 32 arranged in a Y-shape. The wavelength division filter group 31 includes multiple first filters 311; the wavelength combination filter group 32 includes multiple second filters 321. The multiple first filters 311 and multiple second filters 321 are arranged at equal intervals in a second direction. The spacing between adjacent first filters 311 is different from the spacing between adjacent second filters 321. Both the first filters 311 and the second filters 321 are used to transmit light beams of a specific wavelength and reflect light beams of other wavelengths. A first reflector 40 is disposed between the first prism 10 and the second prism 20, and is located away from the wavelength combination filter. The remaining first filters 311, other than the first filter 311 of the waveplate group 32, correspond to each other to reflect the light beam incident at the common port 60 multiple times between adjacent first filters 311 in sequence. The second reflector 50 is disposed on the side of the second prism 20 away from the first prism 10 and corresponds to the wave-combining filter group 32. The adjacent first filters 311 and the second filters 321 are located in the refraction direction of the second reflector 50, so as to reflect the remaining wavelength light beam multiple times between adjacent second filters 321 in sequence, and then combine the beam through a second reflection between the first filter 311 and the first reflector 40, and then emit it from the common port 60.
[0022] Specifically, the Z-Block component 1000 can perform bidirectional optical path transmission through the same common port 60, which includes a wavelength division optical path and a wavelength combination optical path; the composite beam incident from the common port 60 first enters the wavelength division optical path composed of the first reflector 40 and multiple first filters 311, all of which adopt a uniform first spacing (e.g., Figure 2 As shown in d1, the arrangement allows the light beam to be reflected multiple times sequentially between the two, with each first filter 311 transmitting a specific wavelength of light, ultimately achieving wavelength separation of the composite light. For the wave-combining optical path, by adding a second prism 20 and a second reflector 50, the reflection path of the wave-combining optical path is different from that of the wave-splitting optical path, thereby allowing multiple specific wavelength light beams to be combined to be separated at different second intervals (such as...). Figure 2 As shown in d2, the beams enter each of the second filters 321 of the multiplexing filter group 32, and are reflected multiple times sequentially between adjacent second filters 321 by the second reflector 50. At the same time, the second reflector 50 can also guide beams of different wavelengths to the splitting filter group 31. The beams of different wavelengths are thus transferred to a specific reflection path formed by the first reflector 40 and multiple first filters 311, and are reflected multiple times along this specific reflection path, and finally output from the same common port 60. It can be seen that this single Z-Block component 1000 can adapt to the mixed beam spacing of the transmitting and receiving ends 62, realize the bidirectional transmission function of splitting and multiplexing at the same common port, and has higher integration and more compact structure.
[0023] It should be noted that the optical path of the common port 60 in the Z-Block component 1000 is defined by the second prism 20 and the first prism 10 inside it, and neither the first reflector 40 nor the second reflector 50 acts on this optical path in the first direction. More specifically, during the receiving wavelength division process, the composite beam incident from the common port 60 passes sequentially through the second prism 20 and the first prism 10 in the first direction, and finally directly reaches the first first filter 311 in the wavelength division filter group 31 that is far away from the wavelength combining filter group 32. During the transmitting wavelength combining process, all different wavelength beams to be combined, after being guided to the same first filter 311, pass sequentially through the first prism 10 and the second prism 20 in the opposite direction to the receiving process, and finally are output from the same common port 60.
[0024] It is worth mentioning that by implementing this solution, the cost can be effectively reduced by using only a single Z-Block component 1000. Furthermore, it significantly reduces the size of optical devices while also reducing the complexity of optical device setup. The Z-Block component 1000 is better suited for advanced optical engines with stringent requirements for integration and cost, and can be applied in next-generation high-density optical interconnect solutions such as co-packaged optics (CPO) and linearly driven pluggable optics (LPO).
[0025] Reference Figure 2 In one embodiment, the first prism 10 includes a first surface 11 and a second surface 12 disposed opposite to each other in a first direction. The first surface 11 and the second surface 12 are parallel to each other, and the first surface 11 forms an angle with the first direction (e.g., ...). Figure 2As shown in G), the first surface 11 is equipped with a wave splitter filter group 31 and a wave combiner filter group 32; the second prism 20 includes a third surface 21 and a fourth surface 22 arranged opposite to each other in the first direction. The third surface 21, the fourth surface 22 and the second surface 12 are parallel to each other. The third surface 21 and the second surface 12 are arranged opposite to each other. One of the third surface 21 and the second surface 12 is provided with a first reflector 40, and the fourth surface 22 is provided with a second reflector 50. Thus, the first surface 11, the second surface 12, the third surface 21, and the fourth surface 22 are parallel to each other, which ensures the relative positions of the corresponding wave-splitting filter group 31, wave-combining filter group 32, first reflector 40, and second reflector 50 set on the first prism 10 or the second prism 20. The angle between the second surface 12, the third surface 21, the fourth surface 22 and the first direction directly determines the reflection angle formed after the light beam is placed inside the Z-Block component 1000 and acts on the first reflector 40 or the second reflector 50. By setting the second surface 12, the third surface 21, and the fourth surface 22, it can be ensured that the first reflector 40 and the second reflector 50 are at the preset reflection angle, ensuring the accuracy of the direction of the light beam in multiple reflections. At the same time, it also enables the second reflector 50 to accurately guide light beams of different wavelengths back to the wave-splitting filter group 31, improving the reliability of the wave-combining and wave-splitting optical signal transmission of the Z-Block component 1000.
[0026] Specifically, the first reflector 40 extends along the second surface 12 or the third surface 21 in the second direction. The projections of all the first filters 311, except for the first filter 311 that is far from the multiplexing filter group 32, are within the range of the first reflector 40 in the first direction. The second reflector 50 extends along the fourth surface 22 in the second direction, and the projections of all the second filters 321 in the first direction are within the range of the second reflector 50. Thus, the first reflector 40 and the second reflector 50 can respectively cover the multiplexing filter group 31 and the multiplexing filter group 32.
[0027] Reference Figure 2 and Figure 3 In one embodiment, the first reflector 40 is a reflective film, which is bonded to either the second prism 20 or the first prism 10; and / or, the second reflector 50 is a reflective film, which is bonded to the second prism 20. Thus, both the first reflector 40 and the second reflector 50 are reflective films, and by bonding them to either the first prism 10 or the second prism 20, the structure is simpler, and the reflective film itself is very thin, which helps to reduce the overall size. Furthermore, since the Z-Block component 1000 has extremely high parallel requirements for the optical path transmission of each channel in the first direction, placing the first reflector 40 only on either the second prism 20 or the first prism 10 ensures stable optical path transmission.
[0028] Specifically, in this embodiment, both the first reflector 40 and the second reflector 50 are reflective films. The two reflective films are attached to both sides of the second prism 20 in the first direction. The two reflective films are under the same mounting reference of the second prism 20, which is more conducive to ensuring stable light transmission.
[0029] Reference Figure 2 and Figure 3 In one embodiment, the common port 60 includes a transmitter 61 and a receiver 62 spaced apart in a second direction. The transmitter 61 is located in the transmission direction of the first filter 311 away from the multiplexing filter group 32, and the receiver 62 is located in the refraction direction of the first filter 311 away from the multiplexing filter group 32. Thus, the common port 60 can realize bidirectional synchronous optical signal transmission. In this embodiment, the second direction is perpendicular to the first direction.
[0030] In one embodiment, both the first filter 311 and the second filter 321 are filter films, which are adhered to the first prism 10. This arrangement has several advantages: firstly, the filter films themselves are very thin, and the adhesive method eliminates the need for additional encapsulation, significantly reducing the overall volume; secondly, the filter films are directly adhered to the first surface 11 of the first prism 10, and their positional accuracy is guaranteed by the prism's manufacturing precision, reducing assembly errors and facilitating stable transmission across all optical paths.
[0031] Reference Figure 2 and Figure 3 In one embodiment, two first reflectors 40 are provided, and the two first reflectors 40 are located on both sides of the second filter assembly 30 in the second direction. Thus, in the second direction, the first reflector 40 that is far away from the wavelength division filter group 31 does not participate in optical path reflection, and mainly plays a supporting and connecting role. The first reflector 40 can increase the connection area and contact points between the second prism 20 and the first prism 10, and improve the reliability of assembly.
[0032] In one embodiment, photoresist is used to fill the space between the first prism 10 and the second prism 20. This ensures a secure connection between the two prisms, prevents their relative positions from shifting, and thus guarantees the stability of the optical path structure and the reliability of optical signal transmission.
[0033] In this application, the number of the first filter 311 and the second filter 321 in the wave splitter filter group 31 and the wave combiner filter group 32 can be freely adjusted according to design requirements, and is not limited here. For example, refer to... Figure 1 Two first filters 311 and two second filters 321 are provided, and the spacing between adjacent second filters 321 is greater than the spacing between adjacent first filters 311. Thus, the Z-Block component 1000 supports unidirectional two-channel optical signal transmission. As another example, referring to… Figure 3Each Z-Block component 1000 has three first filters 311 and three second filters 321, with the spacing between adjacent second filters 321 being greater than the spacing between adjacent first filters 311. Thus, the Z-Block component 1000 supports unidirectional three-channel optical signal transmission. Alternatively, each Z-Block component 1000 may have 16 first filters 311 and 16 second filters 321, with the spacing between adjacent second filters 321 being greater than the spacing between adjacent first filters 311. Thus, the Z-Block component 1000 supports unidirectional 16-channel optical signal transmission.
[0034] Understandably, by adjusting the physical arrangement of the first filter 311 and the second filter 321 accordingly, and simultaneously optimizing the reflection angles of the first reflector 40 and the second reflector 50, the different channel spacings required by the receiver 62 and the transmitter 61 can be precisely defined and implemented. This allows the same Z-Block component 1000 design to flexibly adapt to various bidirectional transmission scenarios ranging from low to high channel counts.
[0035] The present invention also discloses an optical device (not shown in the figure) that has wave combining and wave splitting capabilities, which includes the Z-Block component 1000 of the above embodiments.
[0036] In one embodiment, the optical device further includes a collimating lens array (not shown in the figure), which includes multiple collimating sections. Some of these collimating sections correspond one-to-one with the positions of multiple first filters 311, and another portion corresponds one-to-one with the positions of multiple second filters 321. Specifically, the collimating lens array is disposed on the side of the first filters 311 and second filters 321 away from the first prism 10. Thus, a single integrated collimating lens array can simultaneously collimate and couple all light beams entering and leaving the Z-Block assembly 1000. This further reduces the number of optical elements inside the optical device, optimizes the optical path, and effectively reduces the overall size of the optical device. Specifically, this optical device can be configured as a bidirectional wavelength division multiplexer or as an optical engine module.
[0037] To better understand this application, the working principle is explained below through specific embodiments. Figure 2 For example, in an embodiment where both the first filter 311 and the second filter 321 are provided in twos.
[0038] At the receiving end 62, the composite beam enters from the common port 60, passes sequentially through the second prism 20 and the first prism 10, and reaches the first first filter 311 in the wavelength division filter group 31, which is farthest from the wavelength combination filter group 32. This first filter 311 transmits and outputs the beam corresponding to wavelength λ1, while simultaneously reflecting the remaining wavelength beam to the first reflector 40. The first reflector 40 reflects the remaining wavelength beam to another adjacent first filter 311, which transmits and outputs the beam corresponding to wavelength λ2. Thus, the two beams are separated in the second direction by a first distance (e.g., ...). Figure 2 (As shown in d1) the wavelength division is completed. The entire reflected light path is Z-shaped, gradually separating beams of different wavelengths.
[0039] At the transmitting end 61, the corresponding λ3 beams and λ4 beams of different wavelengths are separated by a second gap (e.g., Figure 2 As shown in d2, the beams enter two second filters 321 respectively. Subsequently, the beams pass through the first prism 10 and the second prism 20 in sequence, and are guided to two different preset positions on the second reflector 50. The λ3 beam is refracted by the second reflector 50 to another second filter 321 that is not its incident point, and returns to the second reflector 50 after being reflected by the second filter 321. The λ4 beam directly passes through its corresponding second filter 321 and arrives at the second reflector 50. At this point, the λ3 and λ4 beams pass through the same adjacent wavelength division filter group 31 on the second reflector 50. Here, the λ3 and λ4 beams are guided by the second reflector 50 to a first filter 311 adjacent to the wavelength division filter group 31. Subsequently, the two beams multiplex the Z-shaped reflection path formed by the first reflector 40 and the first filter 311, undergo multiple reflections in the opposite direction to the wavelength division, and finally exit from the common port 60.
[0040] Since the initial paths for processing the wavelength division optical paths of λ1 and λ2 are independent of those for processing the wavelength combination optical paths of λ3 and λ4, the spacing between each first filter 311 and the spacing between each second filter 321 can be set independently and are different from each other. This allows the Z-Block component 1000 to adapt to the spacing of different channels of the transmitting and receiving ends 62. Furthermore, the wavelength combination optical path is guided by the second reflector 50 in the later stage, reusing the Z-shaped reflection optical path in the wavelength division optical path, so that the two signals can be efficiently output from the same common port 60, ultimately realizing the bidirectional transmission function of a single common port 60.
[0041] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Those skilled in the art can modify the technical solutions described in the above embodiments, or make equivalent substitutions for some of the technical features; and all such modifications and substitutions should fall within the protection scope of the appended claims of the present invention.
Claims
1. A Z-Block assembly having a common port for receiving and transmitting a light beam in a first direction, characterized in that, include: First prism; The second prism is disposed on one side of the first prism in the first direction; A filtering component is disposed on the side of the first prism away from the second prism; the filtering component includes a wave-splitting filter group and a wave-combining filter group arranged along a second direction; the wave-splitting filter group includes a plurality of first filters; the wave-combining filter group includes a plurality of second filters; the plurality of first filters and the plurality of second filters are respectively arranged at equal intervals in the second direction; the spacing between adjacent first filters is different from the spacing between adjacent second filters; both the first filters and the second filters are used to transmit light beams of a specific wavelength and reflect light beams of other wavelengths; A first reflector is disposed between the first prism and the second prism, and corresponds to the remaining first filters except for the first filter that is far away from the beam combining filter group, for sequentially reflecting the light beam incident at the common port multiple times between adjacent first filters. The second reflector is disposed on the side of the second prism away from the first prism and corresponds to the wave combining filter group. The adjacent first filter and the second filter are located in the refraction direction of the second reflector, so as to reflect different wavelength beams sequentially multiple times between adjacent second filters, and after secondary reflection between the first filter and the first reflector, they are emitted from the common port.
2. The Z-Block component according to claim 1, characterized in that, The first prism includes a first surface and a second surface arranged opposite to each other in the first direction. The first surface and the second surface are parallel to each other. The first surface is arranged at an angle to the first direction. The first surface is equipped with the wave splitter filter group and the wave combiner filter group. The second prism includes a third surface and a fourth surface arranged opposite to each other in the first direction. The third surface, the fourth surface, and the second surface are parallel to each other. The third surface and the second surface are arranged opposite to each other. One of the third surface and the second surface is equipped with the first reflector. The fourth surface is equipped with the second reflector.
3. The Z-Block component according to claim 2, characterized in that, The first reflective element is a reflective film, which is attached to one of the second prism or the first prism; and / or, the second reflective element is a reflective film, which is attached to the second prism.
4. The Z-Block component according to claim 1, characterized in that, The common port includes a transmitter and a receiver spaced apart in the second direction. The transmitter is located in the transmission direction of the first filter away from the multiplexing filter group, and the receiver is located in the refraction direction of the first filter away from the multiplexing filter group.
5. The Z-Block component according to claim 1, characterized in that, Both the first filter and the second filter are filter films, and the filter films are attached to the first prism.
6. The Z-Block component according to claim 1, characterized in that, Two first reflectors are provided, and the two first reflectors are located on both sides of the second filter assembly in the second direction.
7. The Z-Block component according to claim 2, characterized in that, The space between the first prism and the second prism is filled with photosynthetic adhesive.
8. The Z-Block component according to any one of claims 1-5, characterized in that, There are two of each of the first and second filter elements, and the spacing between adjacent second filter elements is greater than the spacing between adjacent first filter elements.
9. An optical device, characterized in that, It includes the Z-Block component as described in any one of claims 1-8.
10. The optical device according to claim 9, characterized in that, It also includes a collimating lens array, which includes multiple collimating sections, some of which correspond one-to-one with the positions of multiple first filter elements, and other parts of which correspond one-to-one with the positions of multiple second filter elements.