Integrated optical device, multi-core erbium-doped fiber amplifier and communication system
By integrating optical components, the problem of direct splicing of fiber amplifiers in multi-core fiber transmission links was solved, enabling efficient and low-cost optical signal transmission and monitoring, and simplifying the optical path structure.
Patent Information
- Application Number
- CN202423090149.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-12-13
AI Technical Summary
Existing fiber amplifiers cannot be directly fused with input and output multi-core fibers in multi-core fiber transmission links, resulting in problems such as complex structure, low amplification efficiency, large size and high cost.
Design an integrated optical device including a first multi-core fiber collimator, a second multi-core fiber collimator, an isolator, and a beam splitter. Through axis coincidence and unidirectional transmission design, direct fusion of optical signals is achieved, eliminating the need for fan-out and fan-in devices and simplifying the optical path.
It effectively simplifies the structure and optical path of fiber optic amplifiers, improves amplification efficiency, reduces device size and cost, and enables the monitoring of link power.
Smart Images
Figure CN223486230U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of optical fiber communication technology, and in particular to an integrated optical device, a multi-core erbium-doped optical fiber amplifier, and a communication system. Background Technology
[0002] Fiber optic amplifiers have become key components in fiber optic communication systems. They effectively compensate for signal attenuation caused by long-distance transmission and wavelength division, greatly promoting the development of fiber optic communication systems.
[0003] In existing fiber optic amplifiers used in multi-core fiber optic transmission links, the amplifier cannot be directly fused with the input and output multi-core fibers. Instead, fan-out devices are used to distribute the signal from the input multi-core fiber into multiple single-core fibers of the amplifier for individual signal amplification. After amplification, fan-in devices are then used to converge the signals into the output multi-core fiber. However, this approach results in complex structures and amplification paths, impacting the amplifier's amplification efficiency, overall size, and cost. Utility Model Content
[0004] In view of this, the purpose of this application is to overcome the shortcomings of the prior art and provide an integrated optical device.
[0005] To solve the above-mentioned technical problems, this application provides:
[0006] An integrated optical device, comprising:
[0007] First multi-core fiber optic collimator;
[0008] The second multi-core fiber collimator has the axis of the first multi-core fiber collimator coincidentally.
[0009] An isolator is disposed between the first multi-core fiber collimator and the second multi-core fiber collimator for unidirectional transmission of optical signals from the first multi-core fiber collimator to the second multi-core fiber collimator.
[0010] A beam splitter is disposed between the first multi-core fiber collimator and the isolator, and the axis of the beam splitter intersects with the axis of the first multi-core fiber collimator.
[0011] The multi-fiber collimator coincides with the axis of the beam splitter.
[0012] In addition, the integrated optical device according to this application may also have the following additional technical features:
[0013] In some embodiments of this application, the first multi-core fiber collimator includes a first multi-core fiber, a first lens, and a first glass tube. The first multi-core fiber and the first lens are both partially disposed inside the first glass tube, and the first lens is located at one end of the first multi-core fiber near the beam splitter.
[0014] In some embodiments of this application, the second multi-core fiber collimator includes a second multi-core fiber, a second lens, and a second glass tube. Both the second multi-core fiber and the second lens are partially disposed inside the second glass tube, and the second lens is located at one end of the second multi-core fiber near the beam splitter.
[0015] In some embodiments of this application, the multi-fiber collimator includes multiple single-core optical fibers, a third lens, and a third glass tube. The multiple single-core optical fibers and the third lens are partially disposed inside the third glass tube, and the third lens is located at one end of the multiple single-core optical fibers near the beam splitter.
[0016] In some embodiments of this application, the multi-fiber collimator further includes a fixing member, which is partially disposed inside the third glass tube. The fixing member has fixing holes adapted to the plurality of single-core optical fibers, and the plurality of single-core optical fibers are disposed inside the fixing holes.
[0017] In some embodiments of this application, the number of cores and the arrangement of cores in the first multi-core optical fiber and the second multi-core optical fiber are the same.
[0018] In some embodiments of this application, the number of cores of the first multi-core optical fiber is the same as the number of single-core optical fibers, and the arrangement position of the cores of the first multi-core optical fiber is the same as the arrangement position of the plurality of single-core optical fibers.
[0019] In some embodiments of this application, the integrated optical device further includes a base, on which the first multi-core fiber collimator, the second multi-core fiber collimator, the isolator, the beam splitter, and the multi-fiber collimator are all disposed.
[0020] Secondly, this application also provides a multi-core erbium-doped fiber amplifier, including the integrated optical device described in any of the above embodiments.
[0021] Thirdly, this application also provides a communication system, including the multi-core erbium-doped fiber amplifier described in the above embodiments.
[0022] Compared to existing technologies, the beneficial effects of this application are:
[0023] This application proposes an integrated optical device comprising a first multi-core fiber collimator, a second multi-core fiber collimator, an isolator, a beam splitter, and a multi-fiber collimator. By aligning the axes of the second multi-core fiber collimator and the first multi-core fiber collimator, placing the isolator between the first and second multi-core fiber collimators, and placing the beam splitter between the first multi-core fiber collimator and the isolator, a portion of the optical signal from the first multi-core fiber collimator can be sequentially transmitted to the second multi-core fiber collimator through the beam splitter and the isolator. This allows the integrated optical device to be directly fused with the first and second multi-core fibers, eliminating the need for fan-out and fan-in devices, effectively simplifying the structure and amplification path, improving amplification efficiency, and reducing the overall size and cost of the device. This avoids the technical problems in existing technologies where fiber amplifiers cannot be directly fused with input and output multi-core fibers. Instead, fan-out devices are needed to disperse the optical signal from the input multi-core fiber into multiple single-core fibers of the fiber amplifier, and then fan-in devices are used to focus the optical signals into the output multi-core fiber. This results in a complex structure and amplification optical path, which affects the amplification efficiency, overall size, and cost of the fiber amplifier.
[0024] Simultaneously, by setting up an isolator for unidirectional transmission of the optical signal from the first multi-core fiber collimator to the second multi-core fiber collimator, the unidirectional transmission characteristic of the isolator prevents the optical signal from the second multi-core fiber collimator from returning to the first multi-core fiber collimator. By setting the axis of the beam splitter to intersect with the axis of the first multi-core fiber collimator, and aligning the axes of the multi-fiber collimator with those of the beam splitter, another portion of the optical signal from the first multi-core fiber collimator can be refracted by the beam splitter and transmitted to the multi-fiber collimator. The multi-fiber collimator then transmits this optical signal to external monitoring equipment to achieve the function of monitoring link power. Attached Figure Description
[0025] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0026] Figure 1 The diagram shows a front view of an integrated optical device in some embodiments of this application;
[0027] Figure 2 A side view schematic diagram of integrated optical devices in some embodiments of this application is shown;
[0028] Figure 3 A cross-sectional schematic diagram of a first multi-core optical fiber is shown in some embodiments of this application;
[0029] Figure 4 The diagram shows cross-sectional views of several single-core optical fibers and fasteners in some embodiments of this application.
[0030] Explanation of key component symbols:
[0031] 100 - Integrated optical components;
[0032] 110 - First multi-core fiber collimator; 111 - First multi-core fiber; 112 - First lens; 113 - First glass tube;
[0033] 120 - Second multi-core fiber collimator; 121 - Second multi-core fiber; 122 - Second lens; 123 - Second glass tube;
[0034] 130 - Isolator;
[0035] 140-splitter;
[0036] 150 - Multi-fiber collimator; 151 - Single-core optical fiber; 152 - Third lens; 153 - Third glass tube; 154 - Fixing component; 1541 - Fixing hole;
[0037] 160 - Base. Detailed Implementation
[0038] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.
[0039] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0041] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0042] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0043] like Figure 1 and Figure 2 As shown, an embodiment of this application provides an integrated optical device 100, mainly used in a multi-core erbium-doped fiber amplifier, which is primarily used in communication systems. The integrated optical device 100 includes a first multi-core fiber collimator 110, a second multi-core fiber collimator 120, an isolator 130, a beam splitter 140, and a multi-fiber collimator 150.
[0044] The second multi-core fiber collimator 120 has its axis coincident with that of the first multi-core fiber collimator 110. The isolator 130 is disposed between the first multi-core fiber collimator 110 and the second multi-core fiber collimator 120, and is used for unidirectional transmission of optical signals from the first multi-core fiber collimator 110 to the second multi-core fiber collimator 120. The beam splitter 140 is disposed between the first multi-core fiber collimator 110 and the isolator 130. The axis of the beam splitter 140 intersects with the axis of the first multi-core fiber collimator 110, and the multi-fiber collimator 150 has its axis coincident with that of the beam splitter 140.
[0045] The integrated optical device 100 provided in the embodiments of this application, by setting the axes of the second multi-core fiber collimator 120 and the first multi-core fiber collimator 110 to coincide, placing the isolator 130 between the first multi-core fiber collimator 110 and the second multi-core fiber collimator 120, and placing the beam splitter 140 between the first multi-core fiber collimator 110 and the isolator 130, allows a portion of the optical signal from the first multi-core fiber collimator 110 to be transmitted sequentially through the beam splitter 140 and the isolator 130 to the second multi-core fiber collimator 120. This enables the integrated optical device 100 to be directly fused with the first multi-core fiber 111 and the second multi-core fiber 121, eliminating the need for fan-out and fan-in devices, effectively simplifying the structure and amplification optical path, improving amplification efficiency, and reducing the overall size and cost of the device. This avoids the technical problems in existing technologies where fiber amplifiers cannot be directly fused with input and output multi-core fibers. Instead, fan-out devices are needed to disperse the optical signal from the input multi-core fiber into multiple single-core fibers of the fiber amplifier, and then fan-in devices are used to focus the optical signals into the output multi-core fiber. This results in a complex structure and amplification optical path, which affects the amplification efficiency, overall size, and cost of the fiber amplifier.
[0046] Meanwhile, by setting an isolator 130 for unidirectional transmission of optical signals from the first multi-core fiber collimator 110 to the second multi-core fiber collimator 120, the optical signals from the second multi-core fiber collimator 120 are prevented from returning to the first multi-core fiber collimator 110 under the unidirectional transmission characteristics of the isolator 130.
[0047] By setting the axis of the optical splitter 140 to intersect with the axis of the first multi-core fiber collimator 110, and setting the axis of the multi-fiber collimator 150 to coincide with the axis of the optical splitter 140, another part of the optical signal of the first multi-core fiber collimator 110 can be refracted by the optical splitter 140 and transmitted to the multi-fiber collimator 150. The multi-fiber collimator 150 then transmits the optical signal to the external monitoring equipment to realize the function of monitoring link power.
[0048] like Figure 1 As shown, in one embodiment of this application, the first multi-core fiber collimator 110 includes a first multi-core fiber 111, a first lens 112 and a first glass tube 113. The first multi-core fiber 111 and the first lens 112 are both partially disposed in the first glass tube 113, and the first lens 112 is located at one end of the first multi-core fiber 111 near the beam splitter 140.
[0049] As a result, the divergent optical signal input from the first multi-core optical fiber 111 is collimated into a parallel optical signal by the first lens 112 before being directed to the beam splitter 140, effectively improving the transmission and coupling efficiency of the optical signal.
[0050] For example, the first lens 112 may be a convex lens.
[0051] like Figure 1 As shown in the above embodiments of this application, the second multi-core fiber collimator 120 includes a second multi-core fiber 121, a second lens 122, and a second glass tube 123. The second multi-core fiber 121 and the second lens 122 are both partially disposed inside the second glass tube 123, and the second lens 122 is located at one end of the second multi-core fiber 121 near the beam splitter 140.
[0052] As a result, the optical signal transmitted sequentially through the splitter 140 and the isolator 130 is collimated by the second lens 122 and then received by the second multi-core optical fiber 121, effectively improving the transmission and coupling efficiency of the optical signal.
[0053] For example, the second lens 122 can be a convex lens.
[0054] like Figure 1 As shown in the above embodiments of this application, the multi-fiber collimator 150 includes a plurality of single-core optical fibers 151, a third lens 152 and a third glass tube 153. The plurality of single-core optical fibers 151 and the third lens 152 are partially disposed in the third glass tube 153, and the third lens 152 is located at one end of the plurality of single-core optical fibers 151 near the beam splitter 140.
[0055] As a result, the optical signal transmitted by the beam splitter 140 is collimated by the third lens 152 and then received by multiple single-core optical fibers 151, effectively improving the transmission and coupling efficiency of the optical signal.
[0056] For example, the third lens 152 can be a convex lens.
[0057] like Figure 4 As shown in the above embodiments of this application, the multi-fiber collimator 150 further includes a fixing member 154. The fixing member 154 is partially disposed inside the third glass tube 153. The fixing member 154 has fixing holes 1541 adapted to the plurality of single-core optical fibers 151. The plurality of single-core optical fibers 151 are disposed inside the fixing holes 1541.
[0058] In this embodiment, by partially placing the fixing member 154 inside the third glass tube 153, and opening fixing holes 1541 on the fixing member 154 that are compatible with multiple single-core optical fibers 151, and placing multiple single-core optical fibers 151 inside the fixing holes 1541, the multiple single-core optical fibers 151 are stably placed on the fixing member 154 under the limiting effect of the fixing holes 1541, thereby stably placing them inside the third glass tube 153, avoiding displacement of the multiple single-core optical fibers 151 that would affect their reception of optical signals and thus affect the monitoring link power function.
[0059] like Figure 3 As shown, in the above embodiments of this application, the number of fiber cores and the arrangement of fiber cores of the first multi-core optical fiber 111 and the second multi-core optical fiber 121 are the same.
[0060] This makes the number of cores and the arrangement of the cores in the second multi-core optical fiber 121 match those in the first multi-core optical fiber 111, thereby facilitating the second multi-core optical fiber 121 to receive the optical signals transmitted by the first multi-core optical fiber 111.
[0061] like Figure 3 and Figure 4 As shown, in the above embodiments of this application, the number of cores of the first multi-core optical fiber 111 is the same as the number of single-core optical fibers 151, and the arrangement position of the cores of the first multi-core optical fiber 111 is the same as the arrangement position of the plurality of single-core optical fibers 151.
[0062] This makes the number and arrangement of single-core optical fibers 151 match the number and arrangement of the cores of the first multi-core optical fiber 111, thereby facilitating the multiple single-core optical fibers 151 to receive the optical signals transmitted by the first multi-core optical fiber 111.
[0063] like Figure 1 and Figure 2 As shown, in any of the above embodiments of this application, the integrated optical device 100 further includes a base 160, and the first multi-core fiber collimator 110, the second multi-core fiber collimator 120, the isolator 130, the beam splitter 140 and the multi-fiber collimator 150 are all disposed on the base 160.
[0064] This achieves a stable installation of the first multi-core fiber collimator 110, the second multi-core fiber collimator 120, the isolator 130, the beam splitter 140, and the multi-fiber collimator 150, keeping their positions fixed and thus ensuring the stability and reliability of the integrated optical device 100.
[0065] This application also provides a multi-core erbium-doped fiber amplifier, including the integrated optical device 100 described in the above embodiments.
[0066] The multi-core erbium-doped fiber amplifier has the integrated optical device 100 in any of the above embodiments, and therefore has all the beneficial effects of the integrated optical device 100, which will not be described in detail here.
[0067] This application also provides a communication system, including the multi-core erbium-doped fiber amplifier described in the above embodiments.
[0068] The communication system has the multi-core erbium-doped fiber amplifier described in the above embodiments, and therefore has all the beneficial effects of the multi-core erbium-doped fiber amplifier, which will not be elaborated here.
[0069] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0070] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.
Claims
1. An integrated optical device, characterized in that, include: First multi-core fiber optic collimator; The second multi-core fiber collimator has the axis of the first multi-core fiber collimator coincidentally. An isolator is disposed between the first multi-core fiber collimator and the second multi-core fiber collimator for unidirectional transmission of optical signals from the first multi-core fiber collimator to the second multi-core fiber collimator. A beam splitter is disposed between the first multi-core fiber collimator and the isolator, and the axis of the beam splitter intersects with the axis of the first multi-core fiber collimator. The multi-fiber collimator coincides with the axis of the beam splitter.
2. The integrated optical device according to claim 1, characterized in that, The first multi-core fiber collimator includes a first multi-core fiber, a first lens, and a first glass tube. The first multi-core fiber and the first lens are both partially disposed inside the first glass tube, and the first lens is located at the end of the first multi-core fiber closer to the beam splitter.
3. The integrated optical device according to claim 2, characterized in that, The second multi-core fiber collimator includes a second multi-core fiber, a second lens, and a second glass tube. Both the second multi-core fiber and the second lens are partially disposed inside the second glass tube, and the second lens is located at one end of the second multi-core fiber near the beam splitter.
4. The integrated optical device according to claim 2, characterized in that, The multi-fiber collimator includes multiple single-core optical fibers, a third lens, and a third glass tube. The multiple single-core optical fibers and the third lens are partially disposed inside the third glass tube, and the third lens is located at one end of the multiple single-core optical fibers near the beam splitter.
5. The integrated optical device according to claim 4, characterized in that, The multi-fiber collimator also includes a fixing component, which is partially disposed inside the third glass tube. The fixing component has fixing holes adapted to the plurality of single-core optical fibers, and the plurality of single-core optical fibers are disposed inside the fixing holes.
6. The integrated optical device according to claim 3, characterized in that, The number of cores and the arrangement of the cores are the same for both the first multi-core optical fiber and the second multi-core optical fiber.
7. The integrated optical device according to claim 4, characterized in that, The number of cores in the first multi-core optical fiber is the same as the number of cores in the single-core optical fiber, and the arrangement of the cores in the first multi-core optical fiber is the same as the arrangement of the multiple single-core optical fibers.
8. The integrated optical device according to any one of claims 1 to 7, characterized in that, The integrated optical device also includes a base, on which the first multi-core fiber collimator, the second multi-core fiber collimator, the isolator, the beam splitter, and the multi-fiber collimator are all disposed.
9. A multi-core erbium-doped fiber amplifier, characterized in that, The integrated optical device includes any one of claims 1 to 8.
10. A communication system, characterized in that, Including the multi-core erbium-doped fiber amplifier as described in claim 9.