High-power free space wavelength division multiplexing device

Abstract

The utility model provides a high-power free space wavelength division multiplexing device, which comprises an input collimator 1, a plurality of first output collimators 2, a plurality of second output collimators 3, a filtering assembly 4 and a reflecting prism 5, and is characterized in that the height of the second output collimators 3 is higher than that of the first output collimators 2; the input collimator 1, the plurality of first output collimators 2 and the plurality of second output collimators 3 are located on the same side of the filtering assembly 4; the reflecting prism 5 is positioned on the other side of the filtering assembly 4; light signals input by the input collimator 1 are split through the filtering assembly 4 and the reflecting prism 5 and are transmitted to the first output collimator 2 and the second output collimator 3 with different vertical heights respectively, so that the size of the wavelength division multiplexing device in the horizontal direction is reduced; and the input end and the output end of the wavelength division multiplexing device are arranged on one side of the wavelength division multiplexing device, so that the occupied area of the device in the horizontal direction is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of optical device design, and particularly relates to a high-power free-space wavelength division multiplexing device. Background Technique

[0002] Wavelength division multiplexing technology can make full use of the huge bandwidth resources in the low-loss band of optical fibers, increasing the transmission capacity of a single optical fiber by several or dozens of times compared with single-band transmission, and has great application value and economic value. In the existing coarse wavelength division multiplexer (CWDM), due to the large number of input or output ends, the occupied area of the wavelength division multiplexing device in the horizontal direction is large, which is not conducive to the arrangement of each device. At the same time, most of the input and output ends of the wavelength division multiplexing device are arranged on different sides of the wavelength division multiplexing device, resulting in a further increase in the occupied space of the wavelength division multiplexing device, and there are large limitations in the size structure.

[0003] In view of this, overcoming the defects of the existing technology is an urgent problem to be solved in this technical field. Summary of the Utility Model

[0004] The problem to be solved by the utility model is how to reduce the size of the wavelength division multiplexing device in the horizontal direction and arrange the input and output ends of the wavelength division multiplexing device on the same side.

[0005] In a first aspect, a high-power free-space wavelength division multiplexing device is provided, including: an input collimator 1, a plurality of first output collimators 2, a plurality of second output collimators 3, a filtering component 4, and a reflecting prism 5, wherein:

[0006] The height where the plurality of second output collimators 3 are located is higher than the height where the plurality of first output collimators 2 are located;

[0007] The input collimator 1, the plurality of first output collimators 2, and the plurality of second output collimators 3 are located on the same side of the filtering component 4; the reflecting prism 5 is located on the other side of the filtering component 4;

[0008] The filtering component 4 is used to reflect or transmit multi-wavelength optical signals from the input collimator 1, and a part of the optical signals are output through the plurality of first output collimators 2; another part of the optical signals are reflected by the reflecting prism 5 and then output through the plurality of second output collimators 3.

[0009] Preferably, the high-power free-space wavelength division multiplexing device further includes a packaging box 6;

[0010] The encapsulation box 6 includes a bottom plate 61 and a stepped bracket 62. The bottom plate 61 is located at the bottom of the encapsulation box 6, and the vertical height of the stepped bracket 62 is higher than that of the bottom plate 61.

[0011] The input collimator 1, the multiple first output collimators 2, the filtering component 4, and the reflecting prism 5 are arranged on the bottom plate 61; the multiple second output collimators 3 are arranged on the stepped bracket 62. The input collimator 1, the multiple first output collimators 2, and the multiple second output collimators 3 all extend from the same side of the encapsulation box 6.

[0012] Preferably, the input collimator 1, the multiple first output collimators 2, and the multiple second output collimators 3 have the same structure, and each includes: a glass tube 11, a lens 12, and an optical fiber ferrule assembly 13, where:

[0013] The glass tube 11 is provided with a through hole 111 along its central axis, and the through hole 111 penetrates through both ends of the glass tube 11; the glass tube 11 is further provided with a processing hole 112, and the processing hole 112 penetrates from the outer side surface of one side of the glass tube 11 to the outer side surface of the other side of the glass tube 11 and passes through the through hole 111.

[0014] The optical fiber ferrule assembly 13 is located in the through hole 111, and one end of the optical fiber ferrule assembly 13 extends to the position of the processing hole 112 in the through hole 111, and the other end of the optical fiber ferrule assembly 13 extends out from the first end of the through hole 111.

[0015] The lens 12 is located in the through hole 111, and one end of the lens 12 extends to the position of the processing hole 112, and the other end of the lens 12 extends out from the second end of the through hole 111.

[0016] Preferably, the optical fiber ferrule assembly 13 includes: a capillary 131 and a transmission optical fiber 132, where:

[0017] The capillary 131 is provided with an optical fiber hole 133 along its central axis, and the optical fiber hole 133 penetrates through both ends of the capillary 131. The capillary 131 is located in the through hole 111.

[0018] The transmission optical fiber 132 is located in the optical fiber hole 133, with one end extending to the lens 12 and the other end extending out from the optical fiber hole 133.

[0019] Preferably, a preset distance is provided between the end face of the lens 12 and the end face of the capillary 131 facing the lens 12.

[0020] Preferably, a flared opening 134 is provided on the end face of the optical fiber hole 133 facing away from the lens 12.

[0021] Preferably, a protective silica gel 135 is provided on the outer end surface of the bell mouth 134.

[0022] Preferably, the filtering component 4 includes: a wedge-shaped sheet 41, a glass bracket 42, a plurality of first filtering sheets 43 and a plurality of second filtering sheets 44, wherein:

[0023] The glass bracket 42 is arranged on the bottom plate 61. The glass bracket 42 includes a first side surface 421 and a second side surface 422. The first side surface 421 faces the input collimator 1, and the second side surface 422 faces the reflection prism 5;

[0024] The wedge-shaped sheet 41 and the plurality of first filtering sheets 43 are arranged on the first side surface 421, and the plurality of second filtering sheets 44 are arranged on the second side surface 422;

[0025] The plurality of first filtering sheets 43 and the plurality of second filtering sheets 44 each transmit or reflect light of a predetermined wavelength.

[0026] Preferably, a plurality of fiber outlet holes 63 are provided on the side end surface of the packaging box 6. The optical fibers of the input collimator 1, the optical fibers of the plurality of first output collimators 2, and the optical fibers of the plurality of second output collimators 3 extend out from the corresponding fiber outlet holes 63.

[0027] Preferably, the height difference between the height where the plurality of second output collimators 3 are located and the height where the plurality of first output collimators 2 are located is 2.6 mm ± 0.1 mm.

[0028] The present utility model provides a high-power free-space wavelength division multiplexing device, including: an input collimator 1, a plurality of first output collimators 2, a plurality of second output collimators 3, a filtering component 4 and a reflection prism 5. The height where the plurality of second output collimators 3 are located is higher than the height where the plurality of first output collimators 2 are located. The input collimator 1, the plurality of first output collimators 2, and the plurality of second output collimators 3 are located on the same side of the filtering component 4; the reflection prism 5 is located on the other side of the filtering component 4; the optical signal input by the input collimator 1 is split by the filtering component 4 and the reflection prism 5 and respectively transmitted to the first output collimator 2 and the second output collimator 3 at different vertical heights. The input end and the output end of the wavelength division multiplexing device are arranged on one side of the wavelength division multiplexing device, reducing the occupied area of the device in the horizontal direction. Description of the Drawings

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0030] Figure 1 Schematic diagram of the structure of a high-power free-space wavelength division multiplexing device provided by an embodiment of the present invention;

[0031] Figure 2 Cross-sectional view of a collimator in a high-power free-space wavelength division multiplexing device provided by an embodiment of the present invention;

[0032] Figure 3 Schematic diagram of the structure of an optical fiber ferrule assembly in a high-power free-space wavelength division multiplexing device provided by an embodiment of the present invention;

[0033] Figure 4 Schematic diagram of the structure of an optical fiber ferrule assembly in another high-power free-space wavelength division multiplexing device provided by an embodiment of the present invention;

[0034] Figure 5 Schematic diagram of the structure of an optical fiber ferrule assembly in yet another high-power free-space wavelength division multiplexing device provided by an embodiment of the present invention;

[0035] Figure 6 Cross-sectional view of a collimator in another high-power free-space wavelength division multiplexing device provided by an embodiment of the present invention;

[0036] Figure 7 Schematic diagram of the structure of another high-power free-space wavelength division multiplexing device provided by an embodiment of the present invention;

[0037] Figure 8 Schematic diagram of the structure of yet another high-power free-space wavelength division multiplexing device provided by an embodiment of the present invention;

[0038] Figure 9 Side view of the packaging box of a high-power free-space wavelength division multiplexing device provided by an embodiment of the present invention;

[0039] Figure 10 Schematic diagram of a reflection prism in a high-power free-space wavelength division multiplexing device provided by an embodiment of the present invention;

[0040] Figure 11 Schematic diagram of the heights of the first output collimator and the second output collimator in a high-power free-space wavelength division multiplexing device provided by an embodiment of the present invention;

[0041] Among them, the drawing numbers are as follows:

[0042] Input collimator 1; glass tube 11; through hole 111; processing hole 112; lens 12; optical fiber ferrule assembly 13; transmission optical fiber 132; first optical fiber 1321; cladding section 1321a; bare section 1321b; second optical fiber 1322; capillary 131; optical fiber hole 133; flared opening 134; protective silica gel 135; first output collimator 2; second output collimator 3; filtering component 4; wedge-shaped piece 41; glass bracket 42; first side 421; second side 422; first filter 43; second filter 44; reflecting prism 5; packaging box 6; bottom plate 61; stepped bracket 62; fiber outlet hole 63. Specific embodiments

[0043] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0044] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure.

[0045] In the description of the present utility model, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present disclosure, unless otherwise specified, the meaning of "a plurality" is two or more. In addition, for example, in the description, for the same type of nouns, the method of adding "A" and "B" at the end is used to describe them as two independent individuals. In this case, the features defined with "A" and "B" are only used for the purpose of distinguishing the same type of individuals and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features.

[0046] In the description of some embodiments, the expressions "coupled", "coupling", and "connected" and their derivatives may be used. For example, in the description of some embodiments, the term "connected" may be used to indicate that two or more components have direct physical contact or electrical contact with each other. Another example is that in the description of some embodiments, the term "coupled" may be used to indicate that two or more components have direct physical contact or electrical contact. However, the term "connected" or "coupled" may also mean that two or more components do not have direct contact with each other, but still cooperate or interact with each other, such as "optical path coupling", "wireless connection", etc. The embodiments disclosed herein are not necessarily limited to the content of the present utility model.

[0047] In the description of the present utility model, there will be a description of the expression "A and / or B", where A and B are used to formally represent specific feature contents. The corresponding expression includes the following three combinations: only A, only B, and the combination of A and B.

[0048] The "about", "substantially", or "approximate" used in the present utility model includes the stated value and the average value within an acceptable deviation range of the specific value, where the acceptable deviation range is determined by those of ordinary skill in the art considering the measurement being discussed and the errors associated with the measurement of the specific quantity, i.e., the limitations of the measurement system.

[0049] Unless the context otherwise requires, throughout the specification and claims, the term "comprising" is to be construed in an open inclusive sense, i.e., "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "examples", "specific examples", or "some examples", etc. are intended to indicate that the specific features, structures, materials, or characteristics related to the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representations of the above terms do not necessarily refer to the same embodiment or example. In addition, the specific features, structures, materials, or characteristics may be included in any one or more embodiments or examples in any appropriate manner, that is, although they may be carried in the embodiments or examples of the above terms due to reasons such as the order and position of appearance, but it is not limited that they can be carried by one embodiment or example in a combined manner.

[0050] In addition, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0051] Embodiment 1:

[0052] Embodiment 1 of the present utility model provides a high-power free-space wavelength division multiplexing device, such as Figure 1As shown in the figure, it includes: an input collimator 1, a plurality of first output collimators 2, a plurality of second output collimators 3, a filtering component 4, and a reflecting prism 5, where:

[0053] The height where the plurality of second output collimators 3 are located is higher than the height where the plurality of first output collimators 2 are located; the input collimator 1, the plurality of first output collimators 2, and the plurality of second output collimators 3 are located on the same side of the filtering component 4; the reflecting prism 5 is located on the other side of the filtering component 4; the filtering component 4 is used to reflect or transmit the multi-wavelength optical signal from the input collimator 1, and a part of the optical signal is output via the plurality of first output collimators 2; another part of the optical signal is output via the plurality of second output collimators 3 after being reflected by the reflecting prism 5.

[0054] In one embodiment, the packaging box 6 includes a bottom plate 61 and a stepped bracket 62. The bottom plate 61 is located at the bottom of the packaging box 6, and the vertical height of the stepped bracket 62 is higher than that of the bottom plate 61. Among them, the stepped bracket 62 can be arranged on the inner side wall of the packaging box 6, or the stepped bracket 62 can be arranged on or directly on the bottom plate 61.

[0055] In this embodiment, the packaging box 6 can be a square box shape, and is used to integrate the related devices of wavelength division multiplexing in the packaging box 6. The bottom plate 61 is located at the bottom of the packaging box 6 and is used to support the devices in the packaging box 6. The side walls and the top of the packaging box 6 are also provided with corresponding covers, and the entire packaging box 6 is packaged by glue or parallel sealing welding.

[0056] In this embodiment, the height difference between the height where the plurality of second output collimators 3 are located and the height where the plurality of first output collimators 2 are located is 2.6 mm ± 0.1 mm.

[0057] In one embodiment, the stepped bracket 62 is arranged on the inner side wall of the packaging box 6 and extends towards the middle of the inside of the packaging box 6. There is a vertical height difference between the stepped bracket 62 and the bottom plate 61, and there is a gap between the stepped bracket 62 and the bottom plate 61 for accommodating other devices; both the bottom plate 61 and the stepped bracket 62 are used to set and install corresponding devices, so as to ensure that there is a vertical height difference between the devices installed on the bottom plate 61 and the devices installed on the stepped bracket 62, thereby reducing the occupation area pressure of the devices in the horizontal direction and making full use of the space in the vertical height.

[0058] The input collimator 1, multiple first output collimators 2, the filtering component 4, and the reflection prism 5 are arranged on the bottom plate 61; the multiple second output collimators 3 are arranged on the stepped bracket 62. The input collimator 1, the multiple first output collimators 2, and the multiple second output collimators 3 all extend from the same side of the packaging box 6.

[0059] In this embodiment, the input collimator 1, the first output collimator 2, and the second output collimator 3 are all coreless collimators, and optical fibers and lenses are arranged inside, and optical signals are transmitted through the optical fibers. Since the high-power free-space wavelength division multiplexing device is used for wavelength combining and splitting, a relatively large number of coreless collimators are required. Therefore, all the input collimators 1, the first output collimators 2, and the second output collimators 3 need to be properly arranged in the packaging box 6 to satisfy the transmission of the corresponding optical paths. Considering that if all the first output collimators 2 and the second output collimators 3 are arranged in parallel in the same horizontal direction, a large amount of area will inevitably be occupied in the horizontal direction, resulting in an overly large volume of the packaging box 6, which is not conducive to the practical application of the device. Therefore, in this embodiment, all the first output collimators 2 are arranged on the bottom plate 61, and all the second output collimators 3 are arranged on the stepped bracket 62, so that the two groups of collimators are arranged at different vertical heights, greatly reducing the area occupied by the collimators in the horizontal direction. The optical paths are reflected and transmitted through the filtering component 4 and the reflection prism 5, so that the two groups of optical paths are both transmitted in the same side direction but at different vertical heights and are received by the corresponding first output collimators 2 and second output collimators 3. While reducing the area occupied by the two groups of collimators in the horizontal direction, the output end and the input end are arranged at the same side position, further reducing the area occupied by the device in the horizontal direction.

[0060] The optical signal output by the input collimator 1 passes through the transmission and reflection of the filtering component 4 and outputs multiple first outgoing lights, and the multiple first outgoing lights are respectively received by the multiple first output collimators 2.

[0061] The optical signal output by the input collimator 1 passes through the transmission and / or reflection of the filtering component 4 and outputs multiple second outgoing lights to the reflection prism 5. The reflection prism 5 reflects the multiple second outgoing lights, and the reflected multiple second outgoing lights are respectively received by the multiple second output collimators 3.

[0062] In this embodiment, the filtering component 4 includes multiple filter sheets. Each filter sheet performs partial transmission and partial reflection on the received optical signal. The reflected optical signal continues to be incident on the next filter sheet; the transmitted optical signal is transmitted to the corresponding first output collimator 2 or transmitted to the reflection prism 5, and the reflection prism 5 reflects the received optical signal to the corresponding second output collimator 3.

[0063] The reflection prism 5 can perform at least two total internal reflections on the received optical signal. The angle of each total internal reflection can be 45 degrees, reflecting the second outgoing light to the vertical height where the second output collimator 3 is located and being received by the corresponding second output collimator 3, thereby realizing the splitting of the input light and the reception of the optical signals of the output collimators at different vertical heights.

[0064] In summary, in the high-power free-space wavelength division multiplexer provided in this embodiment, the first collimator 2 and the second collimator 3 are arranged at different vertical heights, multiplexing the space in the vertical height and making the size of the overall structure smaller.

[0065] In this embodiment, when the collimator is encapsulated, the various devices inside are usually bonded and fixed by glue. However, the problem is that the glue will release some substances, resulting in the deterioration of the device indicators. In order to suppress this situation, the following design is also involved for the collimator in this embodiment:

[0066] As Figure 2 shown, the input collimator 1, the multiple first output collimators 2, and the multiple second output collimators 3 have the same structure, all including: a glass tube 11, a lens 12, and an optical fiber ferrule assembly 13. Among them: a through hole 111 is provided along the central axis of the glass tube 11, and the through hole 111 penetrates both ends of the glass tube 11; a processing hole 112 is also provided on the glass tube 11, and the processing hole 112 penetrates from the outer side surface of one side of the glass tube 11 to the outer side surface of the other side of the glass tube 11 and passes through the through hole 111.

[0067] The optical fiber ferrule assembly 13 is located inside the through hole 111, the glass tube 11 is sleeved around the optical fiber ferrule assembly 13, one end of the optical fiber ferrule assembly 13 extends to the position of the processing hole 112 in the through hole 111, and the other end of the optical fiber ferrule assembly 13 extends out from the first end of the through hole 111; the lens 12 is located inside the through hole 111, the glass tube 11 is sleeved around the lens 12, one end of the lens 12 extends to the position of the processing hole 112, and the other end of the lens 12 extends out from the second end of the through hole 111.

[0068] In this embodiment, the optical fiber ferrule assembly 13 and the glass tube 11 can be fixed by glue, and the lens 12 and the glass tube 11 can also be fixed by glue. During the curing process of the glue, the substances released from the glue can flow to the outside through the processing hole 112, avoiding the substances released from the glue being unable to output to the outside inside the glass tube 11 and adhering to the light-transmitting surfaces of the various optical devices inside.

[0069] AsFigure 2 and Figure 3 As shown in Figure 3 , in this embodiment, the optical fiber ferrule assembly 13 includes: a capillary 131 and a transmission optical fiber 132, where:

[0070] The capillary 131 is provided with an optical fiber hole 133 along its central axis. The optical fiber hole 133 penetrates through both ends of the capillary 131. The capillary 131 is located in the through hole 111; the transmission optical fiber 132 is located in the optical fiber hole 133, with one end extending to the lens 12 and the other end protruding from the optical fiber hole 133.

[0071] As Figures 2 - 5 shown, the transmission optical fiber 132 includes: a first optical fiber 1321 and a second optical fiber 1322, where: one section of the first optical fiber 1321 is a cladding section 1321a, and the other section of the first optical fiber 1321 is a bare section 1321b; the bare section 1321b is located in the optical fiber hole 133, and the cladding section 1321a protrudes from the optical fiber hole 133 in the direction towards the first end; the second optical fiber 1322 is located in the optical fiber hole 133. One end of the second optical fiber 1322 is fusion-spliced to the bare section 1321b, and the other end of the second optical fiber 1322 extends to the end face of the optical fiber hole 133.

[0072] In this embodiment, the first optical fiber 1321 is a multimode optical fiber or a beam-expanding optical fiber with a uniform refractive index of the medium; so as to make the end face spot of the transmitted optical signal diverge, resulting in a decrease in the optical power density of the transmitted light. The cladding section 1321a is a part of the optical fiber of the first optical fiber 1321 that has a cladding or coating layer, and the bare section 1321b is a part of the optical fiber of the first optical fiber 1321 from which the cladding or coating layer has been removed. As Figure 5 shown, the bare section 1321b is entirely located inside the optical fiber hole 133, and the cladding section 1321a is entirely located outside the optical fiber hole 133. The second optical fiber 1322 can be a single-mode optical fiber.

[0073] It should be noted that when stripping the cladding or coating layer of the first optical fiber 1321, the length of the bare section 1321b needs to be calculated first to prevent the length of the bare section 1321b from being too long, resulting in the second optical fiber 1322 piercing out of the optical fiber hole 133 during fusion splicing.

[0074] As Figures 4 - 6 shown, in this embodiment, in order to facilitate the insertion of the optical fiber from the optical fiber port, a flared mouth 134 is provided at the end face of the optical fiber hole 133 facing away from the lens 12. After the first optical fiber 1321 and the second optical fiber 1322 are fusion-spliced, they are inserted into the optical fiber hole 133 through the flared mouth 134, and epoxy glue is poured into the flared mouth 134 for curing.

[0075] Furthermore, since the transition position between the cladding section 1321a and the bare section 1321b is relatively fragile and prone to breakage, and the transition position between the cladding section 1321a and the bare section 1321b is located at the end face of the optical fiber hole 133, a protective silica gel 135 is provided on the outer end face of the bell mouth 134 for protecting the transition position between the cladding section 1321a and the bare section 1321b.

[0076] As Figure 6 shown, a preset distance is provided between the end face of the lens 12 and the end face of the capillary 131 at the end facing the lens 12.

[0077] In this embodiment, the preset distance is set by those skilled in the art, and the preset distance can be 0.18 mm - 0.2 mm. The end face of the lens 12 and the end face of the capillary 131 at the end facing the lens 12 are corresponding inclined planes. When the end face of the lens 12 and the end face of the capillary 131 at the end facing the lens 12 are made to correspond to each other, the positions of the capillary 131 and the lens 12 can be adjusted through an automatic coupling system, and during the debugging process, the insertion loss and return loss are made to meet the requirements; after the debugging is completed, the two ends of the processing hole 112 are subjected to spot gluing treatment with glue. After the glue is completely cured, the component is aged, temperature cycled, the optical indexes are tested, and then packaged, thus completing the production of the corresponding collimator.

[0078] In this embodiment, since in the filtering component 4, the optical signal needs to be reflected one or more times by a plurality of filter sheets so as to reflect the optical signal to a specified position, thereby meeting the reception of the optical signal by the collimators at a plurality of different positions, the following design is also involved in this embodiment:

[0079] As Figure 7 shown, the filtering component 4 includes: a wedge-shaped sheet 41, a glass bracket 42, a plurality of first filter sheets 43, and a plurality of second filter sheets 44, wherein: the glass bracket 42 is arranged on the bottom plate 61, the glass bracket 42 includes a first side face 421 and a second side face 422, the first side face 421 faces the input collimator 1, and the second side face 422 faces the reflection prism 5.

[0080] The wedge-shaped sheet 41 and the plurality of first filter sheets 43 are arranged on the first side face 421, and the plurality of second filter sheets 44 are arranged on the second side face 422; the plurality of first filter sheets 43 and the plurality of second filter sheets 44 respectively transmit or reflect light of a predetermined wavelength.

[0081] The optical signal output by the input collimator 1 exits at a second preset angle after passing through the wedge-shaped sheet 41. After one or more reflections between the multiple first filter sheets 43 and the multiple second filter sheets 44, a part of the optical signal is transmitted through the first filter sheet 43 and received by the corresponding first output collimator 2 as the first output light, and another part of the optical signal is transmitted through the second filter sheet 44 and irradiated onto the reflection prism 5 as the second output light. The reflection prism 5 reflects all the second output light to the corresponding second output collimator 3, and all the second output light is received by the corresponding second output collimator 3.

[0082] In this embodiment, the glass bracket 42 can be supported by high-precision glass, and the first filter sheet 43 and the second filter sheet 44 can be adhered to the glass bracket 42 with glue.

[0083] In this embodiment, the second preset angle is set by those skilled in the art. Among them, the second preset angle can be 8 ± 0.1 degrees or 13.5 ± 0.1 degrees.

[0084] To more clearly show the transmission mode of the optical path in this embodiment, this embodiment takes Figure 8 as an example. Among them, taking the viewing direction in Figure 8 as the reference direction, there are 4 first output collimators 2, which are the first output collimator 2a, the first output collimator 2b, the first output collimator 2c, and the first output collimator 2d from top to bottom. There are 4 second output collimators 3, which are the second output collimator 3a, the second output collimator 3b, the second output collimator 3c, and the second output collimator 3d from top to bottom. There are 4 first filter sheets 43, which are the first filter sheet 43a, the first filter sheet 43b, the first filter sheet 43c, and the first filter sheet 43d from top to bottom. There are 4 second filter sheets 44, which are the second filter sheet 44a, the second filter sheet 44b, the second filter sheet 44c, and the second filter sheet 44d from top to bottom.

[0085] Figure 8The optical path is as follows: The optical signal output from the input collimator 1 is emitted to the second filter 44a at a second preset angle after passing through the wedge-shaped sheet 41. The second filter 44a transmits a part of the optical signal to the reflection prism 5, and the reflection prism 5 reflects the optical signal to the second output collimator 3a. The second filter 44a reflects another part of the optical signal to the first filter 43a. The first filter 43a transmits a part of the received optical signal to the first output collimator 2a, and the first filter 43a reflects another part of the received optical signal to the second filter 44b. The second filter 44b transmits a part of the received optical signal to the reflection prism 5, and the reflection prism 5 reflects the optical signal to the second output collimator 3b. The second filter 44b reflects another part of the optical signal to the first filter 43b. The first filter 43b transmits a part of the received optical signal to the first output collimator 2b, and the first filter 43b reflects another part of the received optical signal to the second filter 44c. The second filter 44c transmits a part of the received optical signal to the reflection prism 5, and the reflection prism 5 reflects the optical signal to the second output collimator 3c. The second filter 44c reflects another part of the optical signal to the first filter 43c. The first filter 43c transmits a part of the received optical signal to the first output collimator 2c, and the first filter 43c reflects another part of the received optical signal to the second filter 44d. The second filter 44d transmits a part of the received optical signal to the reflection prism 5, and the reflection prism 5 reflects the optical signal to the second output collimator 3d. The second filter 44d reflects another part of the optical signal to the first filter 43d. The first filter 43d transmits a part of the received optical signal to the first output collimator 2d.

[0086] As Figure 7 and Figure 9 shown, a plurality of fiber output holes 63 are provided on the side end surface of the packaging box 6, and the optical fibers of the input collimator 1, the optical fibers of the plurality of first output collimators 2, and the optical fibers of the plurality of second output collimators 3 extend out from the corresponding fiber output holes 63.

[0087] In this embodiment, the structure of the reflection prism 5 is as Figure 10 shown. The reflection prism 5 includes two mutually perpendicular inclined reflection surfaces. After the optical signal enters the reflection prism 5, it is reflected upward by the first inclined reflection surface. After rising a certain vertical height, it is reflected by the second inclined reflection surface to the corresponding second output collimator 3. Here, it should be noted that Figure 10 this is only a schematic diagram. For the convenience of installation, Figure 10Part of the corner below the reflection prism 5 can also be cut off to facilitate the installation of the reflection prism 5 on the bottom plate 61.

[0088] As Figure 11 shown, the height of the second output collimator 3 can be 3.8 ± 0.1 mm, the height of the first output collimator 2 can be 1.2 ± 0.1 mm, and the height difference between the height where the plurality of second output collimators 3 are located and the height where the plurality of first output collimators 2 are located is 2.6 mm ± 0.1 mm. In this embodiment, the height difference between the height where the plurality of second output collimators 3 are located and the height where the plurality of first output collimators 2 are located can be 2.7 mm, the height difference between the height where the plurality of second output collimators 3 are located and the height where the plurality of first output collimators 2 are located can be 2.5 mm, and the height difference between the height where the plurality of second output collimators 3 are located and the height where the plurality of first output collimators 2 are located can be 2.6 mm.

[0089] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A high-power free-space wavelength division multiplexing device, characterized in that: include: An input collimator (1), a plurality of first output collimators (2), a plurality of second output collimators (3), a filtering component (4) and a reflecting prism (5), wherein: The height at which the plurality of second output collimators (3) are located is higher than the height at which the plurality of first output collimators (2) are located; The input collimator (1), the plurality of first output collimators (2), and the plurality of second output collimators (3) are located on the same side of the filter assembly (4); and the reflective prism (5) is located on the other side of the filter assembly (4); The filter assembly (4) is used to reflect or transmit the multi-wavelength optical signal from the input collimator (1), wherein a portion of the optical signal is output via the plurality of first output collimators (2); and another portion of the optical signal is reflected by a reflection prism (5) and then output via the plurality of second output collimators (3).

2. The high-power free-space wavelength division multiplexing device according to claim 1, characterized in that: The high-power free-space wavelength division multiplexing device further comprises a packaging box (6); The packaging box (6) comprises a bottom plate (61) and a step bracket (62), wherein the bottom plate (61) is located at the bottom of the packaging box (6), and the vertical height of the step bracket (62) is higher than that of the bottom plate (61); The input collimator (1), the plurality of first output collimators (2), the filter assembly (4) and the reflective prism (5) are arranged on the base plate (61); the plurality of second output collimators (3) are arranged on the step bracket (62); the input collimator (1), the plurality of first output collimators (2) and the plurality of second output collimators (3) all extend from the same side of the packaging box (6).

3. The high-power free-space wavelength division multiplexing device according to claim 1, characterized in that: The input collimator (1), the plurality of first output collimators (2) and the plurality of second output collimators (3) have the same structure, and all comprise: a glass tube (11), a lens (12) and an optical fiber pin assembly (13), wherein: The glass tube (11) is provided with a through hole (111) along the central axis, the through hole (111) penetrating both ends of the glass tube (11); the glass tube (11) is also provided with a processing hole (112), the processing hole (112) penetrating from the outer side surface of one side of the glass tube (11) to the outer side surface of the other side of the glass tube (11) and passing through the through hole (111); The optical fiber pin assembly (13) is located in the through hole (111), one end of the optical fiber pin assembly (13) extends to the location of the processing hole (112) in the through hole (111), and the other end of the optical fiber pin assembly (13) protrudes from the first end of the through hole (111); The lens (12) is located in the through hole (111), one end of the lens (12) extends to the location of the processing hole (112), and the other end of the lens (12) protrudes from the second end of the through hole (111).

4. The high-power free-space wavelength division multiplexing device according to claim 3, characterized in that: The optical fiber pin assembly (13) comprises: a capillary tube (131) and a transmission optical fiber (132), wherein: The capillary tube (131) is provided with an optical fiber hole (133) along the central axis, the optical fiber hole (133) passes through two ends of the capillary tube (131), and the capillary tube (131) is located in the through hole (111); The transmission optical fiber (132) is located in the optical fiber hole (133), with one end extending to the lens (12) and the other end extending out of the optical fiber hole (133).

5. The high-power free-space wavelength division multiplexing device according to claim 4, characterized in that: A preset distance is provided between the end surface of the lens (12) and the end surface of the capillary tube (131) facing one end of the lens (12).

6. The high-power free-space wavelength division multiplexing device according to claim 3, characterized in that: The end surface of the optical fiber hole (133) facing away from the lens (12) is provided with a bell mouth (134).

7. The high-power free-space wavelength division multiplexing device according to claim 6, characterized in that: Protective silica gel (135) is provided on the outer end surface of the bell mouth (134).

8. The high-power free-space wavelength division multiplexing device according to claim 2, characterized in that: The filter assembly (4) comprises: a wedge-shaped piece (41), a glass support (42), a plurality of first filter pieces (43) and a plurality of second filter pieces (44), wherein: The glass support (42) is arranged on the bottom plate (61), the glass support (42) comprising a first side surface (421) and a second side surface (422), the first side surface (421) facing the input collimator (1), and the second side surface (422) facing the reflecting prism (5); The wedge-shaped piece (41) and the plurality of first filter pieces (43) are arranged on the first side surface (421), and the plurality of second filter pieces (44) are arranged on the second side surface (422); The plurality of first filters (43) and the plurality of second filters (44) each transmit or reflect light of a predetermined wavelength.

9. The high-power free-space wavelength division multiplexing device according to claim 2, characterized in that: A plurality of fiber outlet holes (63) are provided on the side end surface of the packaging box (6), and the optical fiber of the input collimator (1), the optical fibers of the plurality of first output collimators (2) and the optical fibers of the plurality of second output collimators (3) extend out from the corresponding fiber outlet holes (63).

10. The high power free space wavelength division multiplexing device according to claim 1, characterized in that: The height difference between the height at which the plurality of second output collimators (3) are located and the height at which the plurality of first output collimators (2) are located is 2.6 mm±0.1 mm.

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