Light beam splitting and combining mechanism

Abstract

The invention relates to the technical field of optical systems, and provides a light beam splitting and combining mechanism. According to the light beam splitting and combining mechanism provided by the invention, when the composite light passes through the first light guide structure, the light with the first wavelength passes through the first reflection part, is separated from the composite light and then is guided out through the first optical fiber connector and the first optical fiber coupling assembly, so that light beam separation is realized. Otherwise, the light of the first wavelength and the light of the second wavelength to the Nth wavelength can be combined into a composite light beam.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical systems, in particular to a light beam splitting and combining mechanism. BACKGROUND

[0002] With the continuous development of optoelectronic technology, various transmission structures have been developed in the field of optical communication, the most representative of which is optical fiber transmission. Optical fibers can be used to guide the directional propagation of light beams. In the transmission of optical fibers, single or mixed light beams of various wavebands or polarization states can be transmitted.

[0003] In the prior art, optical lenses coated with filtering effects are commonly used to separate or filter dedicated wavelengths, which can filter and input single or mixed waveband light to meet actual work requirements. The existing design has the advantages of isolating reverse light with high loss and enabling relatively wide effective separation of two wavelengths.

[0004] However, conventional light wave separation devices are limited to the separation of two or specific wavelengths, and have limitations in the separation of non-applicable wavelengths. SUMMARY

[0005] Therefore, the present application provides a light beam splitting and combining mechanism to solve the above technical problems to some extent.

[0006] The present application provides a light beam splitting and combining mechanism, which comprises: A first light guide structure comprising a first reflection part and a first transmission part connected to each other, the first reflection part being capable of reflecting light of a first wavelength, and the first transmission part being capable of transmitting light of a second wavelength to an Nth wavelength, N being an integer greater than or equal to 2; A first optical fiber, a first optical fiber connector, and a first optical fiber coupling assembly, the first optical fiber connector and the first optical fiber coupling assembly being connected to two ends of the first optical fiber respectively, and the first optical fiber coupling assembly being used to receive light of the first wavelength.

[0007] On the basis of the above technical solution, the light beam splitting and combining mechanism can further comprise: A second light guide structure comprising a second reflection part and a second transmission part connected to each other, the second reflection part being capable of reflecting light of the second wavelength among light of the second wavelength to the Nth wavelength, and the second transmission part being capable of transmitting light of a third wavelength to the Nth wavelength; An Nth light guide structure comprising an Nth reflection part and an Nth transmission part connected to each other, the Nth reflection part being capable of reflecting light of the Nth wavelength among light of the Nth wavelength to an N+1th wavelength, and the Nth transmission part being capable of transmitting light of the N+1th wavelength.

[0008] On the basis of any of the preceding technical solutions, optionally, the light beam splitting and combining mechanism further comprises a housing, the housing having a first direction, the first light guide structure to the Nth light guide structure being alternately arranged along the first direction.

[0009] On the basis of any of the preceding technical solutions, optionally, the light beam splitting and combining mechanism comprises: a second optical fiber, a second optical fiber connector and a second optical fiber coupling assembly, the second optical fiber connector and the second optical fiber coupling assembly being connected to two ends of the second optical fiber respectively, the second optical fiber coupling assembly being configured to receive light of the second wavelength; an Nth optical fiber, an Nth optical fiber connector and an Nth optical fiber coupling assembly, the Nth optical fiber connector and the Nth optical fiber coupling assembly being connected to two ends of the Nth optical fiber respectively, the Nth optical fiber coupling assembly being configured to receive light of the Nth wavelength.

[0010] On the basis of any of the preceding technical solutions, optionally, the light beam splitting and combining mechanism further comprises: a second light guide structure, the second light guide structure comprising a second reflecting portion and a second transmitting portion connected to each other, the second reflecting portion being capable of reflecting light of the third wavelength to the Nth wavelength, the second transmitting portion being capable of transmitting light of the second wavelength; an Nth light guide structure, the Nth light guide structure comprising an Nth reflecting portion and an Nth transmitting portion connected to each other, the Nth reflecting portion being capable of reflecting light of the N+1th wavelength, the Nth transmitting portion being capable of transmitting light of the N+1th wavelength.

[0011] On the basis of any of the preceding technical solutions, optionally, the light beam splitting and combining mechanism further comprises a receiving optical fiber provided for at least one of the second light guide structure to the Nth light guide structure.

[0012] On the basis of any of the preceding technical solutions, optionally, the light beam splitting and combining mechanism further comprises an external connector provided for the receiving optical fiber, the at least one and the external connector being respectively arranged at two ends of the receiving optical fiber.

[0013] On the basis of any of the preceding technical solutions, optionally, the light beam splitting and combining mechanism comprises a housing, the first light guide structure and the first optical fiber coupling assembly being arranged inside the housing, the first optical fiber connector being arranged at an outer side of the housing.

[0014] On the basis of any of the preceding technical solutions, optionally, the light beam splitting and combining mechanism further comprises a light splitting base, an inner portion of the light splitting base having a cavity, the first light guide structure being arranged in the cavity.

[0015] On the basis of any of the preceding technical solutions, optionally, N is an integer greater than or equal to 3.

[0016] Thus, according to the light beam splitting and combining mechanism provided in the present application, when the composite light passes through the first light guide structure, the light of the first wavelength is separated from the composite light by passing through the first reflecting part, and is then guided out through the first fiber joint and the first fiber coupling assembly, thereby realizing the separation of the light beams. Conversely, the light of the first wavelength and the light of the second wavelength to the Nth wavelength can be combined into a composite light beam.

[0017] In order to make the above objectives, characteristics and advantages of the present application more apparent, the following will describe a preferred embodiment in detail, and the accompanying drawings will be referred to, as follows. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0019] Figure 1 A perspective view of the light beam splitting and combining mechanism provided in the embodiment of the present application is shown.

[0020] Figure 2 A specific implementation structure diagram of the light beam splitting and combining mechanism provided in the embodiment of the present application is shown.

[0021] Figure 3 A perspective view of the fiber coupling assembly of the light beam splitting and combining mechanism provided in the embodiment of the present application is shown.

[0022] Figure 4 A sectional view of the fiber coupling assembly of the light beam splitting and combining mechanism provided in the embodiment of the present application is shown.

[0023] Figure 5 A wavelength separation optical path schematic diagram of the light beam splitting and combining mechanism provided in the embodiment of the present application is shown. DETAILED DESCRIPTION

[0024] The technical solutions of the present application will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0025] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0027] In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor is it within the scope of protection required by the present application.

[0028] According to the light beam splitting and combining mechanism provided by the embodiment of the present application, According to the light beam splitting and combining mechanism provided by the embodiment of the present application, the light beam splitting and combining mechanism comprises a first light guide structure, a first optical fiber, a first optical fiber joint and a first optical fiber coupling assembly.

[0029] In the embodiment, the first light guide structure comprises a first reflection part and a first transmission part connected to each other, the first reflection part can reflect light of a first wavelength, the first transmission part transmits light of a second wavelength to an Nth wavelength, N is an integer greater than or equal to 2, the first optical fiber joint and the first optical fiber coupling assembly are respectively connected to two ends of the first optical fiber, and the first optical fiber coupling assembly is used to receive light of the first wavelength.

[0030] In this way, according to the light beam splitting and combining mechanism provided by the embodiment of the present application, when the composite light passes through the first light guide structure, the light of the first wavelength is separated from the composite light by passing through the first reflection part, and then is guided out through the first optical fiber joint and the first optical fiber coupling assembly, thereby realizing the separation of the light beam. Conversely, the light of the first wavelength and the light of the second wavelength to the Nth wavelength can be combined into a composite light beam.

[0031] Thus, the light beam splitting and combining mechanism provided by the embodiment of the present application can separate the single wavelength light beam from the mixed light beam composed of multiple wavelengths after the mixed light beam is refracted or reflected by the specific optical element, and then couple the single wavelength light beam into the optical fiber for transmission. Meanwhile, the reverse single wavelength light beam can be mixed into the multiple wavelength light beam after the reverse single wavelength light beam is refracted or reflected by the specific optical element, and then coupled into the optical fiber for transmission. The overall structure is simple and compact, easy to implement, widely applicable, and highly reliable.

[0032] The light beam splitting and combining mechanism provided by the embodiment of the present application can further include a second light guide structure, the second light guide structure including a second reflection part and a second transmission part connected to each other, the second reflection part being capable of reflecting the light of the second wavelength among the light of the second wavelength to the Nth wavelength, and the second transmission part being capable of transmitting the light of the third wavelength to the Nth wavelength.

[0033] The light beam splitting and combining mechanism provided by the embodiment of the present application can further include an Nth light guide structure, the Nth light guide structure including an Nth reflection part and an Nth transmission part connected to each other, the Nth reflection part being capable of reflecting the light of the Nth wavelength among the light of the Nth wavelength to the N+1th wavelength, and the Nth transmission part being capable of transmitting the light of the N+1th wavelength.

[0034] In this way, by further setting the light guide structure having the same light beam splitting and combining principle as the first light guide structure, the light beams of different wavelengths in the composite light beam are further separated, or the multiple light beams of different wavelengths are combined into the composite light beam.

[0035] The light beam splitting and combining mechanism provided by the embodiment of the present application further includes a housing, the housing having a first direction, and the first light guide structure to the Nth light guide structure being alternately arranged along the first direction.

[0036] The light beam splitting and combining mechanism provided by the embodiment of the present application includes, in matching with the light guide structure: a second optical fiber, a second optical fiber connector, and a second optical fiber coupling assembly, the second optical fiber connector and the second optical fiber coupling assembly being connected to two ends of the second optical fiber respectively, and the second optical fiber coupling assembly being used for receiving the light of the second wavelength; an Nth optical fiber, an Nth optical fiber connector, and an Nth optical fiber coupling assembly, the Nth optical fiber connector and the Nth optical fiber coupling assembly being connected to two ends of the Nth optical fiber respectively, and the Nth optical fiber coupling assembly being used for receiving the light of the Nth wavelength.

[0037] In addition, in another example, the light beam splitting and combining mechanism provided by the embodiment of the present application further includes: a second light guide structure, the second light guide structure including a second reflection part and a second transmission part connected to each other, the second reflection part being capable of reflecting the light of the third wavelength to the Nth wavelength, and the second transmission part being capable of transmitting the light of the second wavelength; The Nth light guide structure includes an Nth reflection part and an Nth transmission part connected to each other, the Nth reflection part is capable of reflecting light of an N+1th wavelength, and the Nth transmission part transmits light of the N+1th wavelength.

[0038] As an example, the light beam splitting and combining mechanism provided by the embodiments of the present application further includes a receiving optical fiber arranged for at least one of the second light guide structure to the Nth light guide structure.

[0039] The light beam splitting and combining mechanism provided by the embodiments of the present application further includes an external joint arranged for the receiving optical fiber, and the at least one is arranged at two ends of the receiving optical fiber respectively.

[0040] The light beam splitting and combining mechanism provided by the embodiments of the present application includes a housing, the first light guide structure and the first optical fiber coupling assembly are arranged in the interior of the housing, and the first optical fiber joint is arranged on the outer side of the housing.

[0041] The light beam splitting and combining mechanism provided by the embodiments of the present application further includes a light splitting base, the interior of the light splitting base has a cavity, and the first light guide structure is arranged in the cavity.

[0042] The light beam splitting and combining mechanism provided by the embodiments of the present application, N is an integer greater than or equal to 3, for example, N is 3.

[0043] On the basis of the above description, the specific examples of the light beam splitting and combining mechanism will be further described below.

[0044] The purpose of the embodiments of the present application is to realize a mixed light beam composed of multiple wavelengths after being refracted or reflected by a specific optical element, and to separate a single wavelength light beam and couple it into an optical fiber for transmission. At the same time, the reverse single wavelength light beam can be mixed into a multi-wavelength light beam after being refracted and reflected by a specific optical element and coupled into an optical fiber for transmission. The overall structure is simple and compact, easy to implement, widely applicable, and highly reliable.

[0045] Specifically, the light splitting base is fixed on the bottom plate, the optical fiber joint and the mixed optical fiber joint are fixed on the side plate, the side plate is fixed on one side of the bottom plate, the optical fiber coupling assembly is fixed on the outer side fixed interface of the light splitting base, and the filter with a specific film layer is fixed by adhesive at a specified position in the interior of the light splitting base. When the mixed light beam is accessed into the incident coupling assembly by the optical fiber, the light beam is collimated into a multi-wavelength mixed parallel light beam, and the parallel light of different wavelengths is refracted and reflected by the filter lens at different angles and positions multiple times, thereby separating the light beam of the required wavelength. Each single-wavelength light beam is respectively focused by the coupling assembly and accessed into the optical fiber for output.

[0046] In a more specific example, the light beam splitting and combining mechanism includes: a shell, a plurality of special filters, a plurality of fiber coupling assemblies, a light splitting base, a fiber joint, a wire clamp, etc. The special filters are fixed by adhesion in the light splitting base, wherein the position and angle of the filters are determined by the light path reflection calculation, and the plurality of fiber coupling assemblies have the same structure.

[0047] As Figure 1 is a schematic diagram of the light beam splitting and combining mechanism, Figure 2 is a schematic diagram of the specific implementation structure. In the figure, the light splitting system structure is composed of a hybrid fiber joint 1, a shell 2, a hybrid light fiber 3, a fiber coupling assembly 4, a light splitting base 5, a flexible wire clamp 6, a filter 7, a first single-wavelength fiber 8, a second single-wavelength fiber 9, a third single-wavelength fiber 10, and a fourth single-wavelength fiber 11.

[0048] In the embodiment, the fiber coupling assembly 4 is composed of a fiber head 4.1, a fiber head fixing seat 4.2, a collimating mirror fixing seat 4.3, a lens compression ring 4.4, a fiber head locking block 4.5, a lens outer ring 4.6, and a collimating adhesive lens 4.7.

[0049] The internal structure of the light splitting base 5 is designed according to the light splitting light path reflection principle. The nominal adhesion fixing positions of different specifications of filters are reserved by machining, the bottom surface of the filter coated with different light transmission specification film layers is mixed with micron specification microbeads by structural adhesive and adhered to the reserved position inside the light splitting base 5, and the final adhesion position is determined by fine adjustment in the actual integration to ensure that the light filtering and coupling efficiency reaches the highest.

[0050] The collimating adhesive lens 4.7 and the lens outer ring 4.6 inside the fiber coupling assembly 4 are glued together, wherein the exit end face of the collimating adhesive lens is flush with the end face of the lens outer ring, the outer thread of the lens compression ring 4.4 is matched with the inner thread of the collimating mirror fixing seat 4.3, the collimating adhesive lens 4.7 and the lens outer ring 4.6 are filled into the groove of the collimating mirror fixing seat 4.3 after gluing, and the lens compression ring 4.4 is tightened by screwing, the fiber head fixing seat 4.2 is tightened to the outer surface of the collimating mirror fixing seat 4.3 by screwing, the fiber head locking block 4.5 is tightened to the fiber head fixing seat 4.2 by screwing, the fiber head is clamped in the middle by the two intermediate flexible structures, and the relative positions of the fiber head 4.1, the collimating adhesive lens 4.7, and the light splitting base 5 are adjusted during the integration process to achieve the maximum efficiency of light splitting and coupling.

[0051] The wavelength separation or beam combining principle diagram is shown in Figure 5 The fiber coupling assembly 4 numbered I is a multi-wavelength hybrid light input / output fiber joint, and the remaining fiber coupling assemblies 4 numbered II, III, IV, and V are single-wavelength light input / output fiber joints. Taking the light beam splitting function as an example, the light beam splitting principle is: The mixed light of four different wavelengths is coupled into the fiber coupling assembly 4 numbered I by an optical fiber, becomes parallel light after collimation, and is refracted and reflected on the front surface of the filter 7 numbered ① due to a specific coating design. At this time, the reflected part is single-wavelength light, which is refracted through the filter 7 numbered ④ and coupled into the fiber coupling assembly 4 numbered II. The light refracted on the surface of the filter 7 numbered ① is reflected on the front surface of the filter 7 numbered ② and is refracted and projected on the filter 7 numbered ③, respectively. The refracted light is coupled into the fiber coupling assembly 4 numbered V through the filter 7 numbered ⑤. The light refracted on the surface of the filter 7 numbered ① is reflected on the front surface of the filter 7 numbered ② and is refracted and projected on the filter 7 numbered ③, respectively. The refracted light is coupled into the fiber coupling assembly 4 numbered V through the filter 7 numbered ⑤. The light reflected on the surface of the filter 7 numbered ③ is coupled into the fiber coupling assembly 4 numbered IV through the filter 7 numbered ⑥.

[0052] The four filters 7 numbered ②, ④, ⑤ and ⑥ have the functions of separating the single-wavelength light beams, refracting the separated light beams through the filters, coupling the light beams into the fiber coupling assembly 4, and realizing secondary filtering of stray light. The angle and position of the filters can be adjusted to adjust the eccentric position of the separated light beams and improve the light beam separation efficiency. The actual work can be set or increased according to the requirements to improve the system efficiency. The upper and lower layers with the same structure can meet the requirements of multiple light separation or beam combination.

[0053] The light beam separation and combination mechanism provided in the embodiments of the present application separates the mixed light beams in a special light path, has high single-wavelength light beam separation efficiency, can increase or reduce the number and type of light paths according to requirements, has simple and compact light source principle and structure layout, is easy to implement, and has strong applicability. Different filter coating designs can be made according to actual requirements, different wavelengths of light can be selectively transmitted or reflected according to requirements, and the required single-wavelength light beams can be separated out through multiple transmission and reflection of the designed light path. At the same time, the single-wavelength light beams can be reversely combined into a mixed light beam. The mixed light beams / separated single-wavelength light beams are coupled into the optical fiber through the fiber coupling assembly for transmission.

[0054] The above is only the preferred embodiments of the present application, and does not limit the protection scope of the present application. Any equivalent structural transformation made by using the content of the present application specification and drawings, or direct / indirect application in other related technical fields under the innovative concept of the present application is included in the protection scope of the present application.

Claims

1. A beam splitting and combining mechanism, characterized in that, The beam splitting and combining mechanism includes: A first light guide structure includes a first reflective part and a first transmissive part connected to each other. The first reflective part is capable of reflecting light of a first wavelength, and the first transmissive part transmits light of a second wavelength to the Nth wavelength, where N is an integer greater than or equal to 2. A first optical fiber, a first optical fiber connector, and a first optical fiber coupling assembly are provided. The first optical fiber connector and the first optical fiber coupling assembly are respectively connected to the two ends of the first optical fiber. The first optical fiber coupling assembly is used to receive light of the first wavelength.

2. The beam splitting and combining mechanism according to claim 1, characterized in that, The beam splitting and combining mechanism further includes: The second light guide structure includes a second reflective part and a second transmissive part connected to each other. The second reflective part is capable of reflecting light of the second wavelength among light of the second wavelength to the Nth wavelength, and the second transmissive part transmits light of the third wavelength to the Nth wavelength. The Nth light guiding structure includes an Nth reflective part and an Nth transmissive part connected to each other. The Nth reflective part is capable of reflecting light of the Nth wavelength from the Nth wavelength to the N+1th wavelength, and the Nth transmissive part transmits light of the N+1th wavelength.

3. The beam splitting and combining mechanism according to claim 2, characterized in that, The beam splitting and combining mechanism also includes a housing having a first direction, and the first light guide structure to the Nth light guide structure are alternately arranged along the first direction.

4. The beam splitting and combining mechanism according to claim 2, characterized in that, The beam splitting and combining mechanism includes: The second optical fiber, the second optical fiber connector, and the second optical fiber coupling assembly are respectively connected to the two ends of the second optical fiber, and the second optical fiber coupling assembly is used to receive light of the second wavelength. The Nth optical fiber, the Nth optical fiber connector, and the Nth optical fiber coupling assembly are respectively connected to the two ends of the Nth optical fiber, and the Nth optical fiber coupling assembly is used to receive light of the Nth wavelength.

5. The beam splitting and combining mechanism according to claim 1, characterized in that, The beam splitting and combining mechanism further includes: The second light guide structure includes a second reflective part and a second transmissive part connected to each other. The second reflective part is capable of reflecting light of a third wavelength to an Nth wavelength, and the second transmissive part transmits light of a second wavelength. The Nth light guiding structure includes an Nth reflective part and an Nth transmissive part connected to each other. The Nth reflective part is capable of reflecting light of the (N+1)th wavelength, and the Nth transmissive part transmits light of the (N+1)th wavelength.

6. The beam splitting and combining mechanism according to any one of claims 2 to 5, characterized in that, The beam splitting and combining mechanism further includes a receiving optical fiber provided for at least one of the second to the Nth light guide structures.

7. The beam splitting and combining mechanism according to claim 6, characterized in that, The beam splitting and combining mechanism further includes an external connector for the receiving optical fiber, wherein at least one of the external connectors is disposed at both ends of the receiving optical fiber.

8. The beam splitting and combining mechanism according to any one of claims 1 to 5, characterized in that, The beam splitting and combining mechanism includes a housing, with the first light guiding structure and the first optical fiber coupling assembly disposed inside the housing, and the first optical fiber connector disposed on the outer side of the housing.

9. The beam splitting and combining mechanism according to claim 8, characterized in that, The beam splitting and combining mechanism also includes a beam splitting base, the beam splitting base having a cavity inside, and the first light guiding structure being disposed within the cavity.

10. The beam splitting and combining mechanism according to any one of claims 1 to 5, characterized in that, N is an integer greater than or equal to 3.

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