Fused biconical taper splitter and optical fiber isolator integrated device
By designing integrated devices of melt cone splitter and fiber isolator in fiber optic communication equipment, forming a ring structure, solving the problem of many ports of conventional splitters and complex fiber use, achieving miniaturization and efficient monitoring effects.
Patent Information
- Application Number
- CN202421162508.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-27
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-05-27
AI Technical Summary
In existing fiber optic communication equipment, the number of conventional 2-2 melt cone splitter ports is large, resulting in a large module size and requires multiple optical fibers to monitor the two optical paths at the same time, making it difficult to manage complex optical path structures.
Design a melt cone splitter and fiber isolator integrated device, which connects two melt cone splitters and one fiber isolator head-to-tail to form a three-port ring structure, reduce the number of ports, and utilizes four A two-part melt cone splitter is realized by a single fiber, and a one-part melt cone splitter is realized by a three-part fiber, sharing the fiber to reduce the total number of fibers.
It realizes the simultaneous monitoring of the inlet port and optical path output in a smaller volume. The effect of monitoring the two optical paths can be completed using only one optical fiber, reducing the module volume and optical path loss.
Smart Images
Figure CN222259623U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an optical path device, in particular to an integrated device of a fused taper splitter and an optical fiber isolator. Background Art
[0002] The emergence of WDM (Wavelength Division Multiplexing) technology has completely changed the way people communicate. Its huge bandwidth, excellent high speed and transparency make it the preferred technology in today's fiber optic communication application field.
[0003] Fused taper refers to bringing two (or more) optical fibers without coatings together in a certain way, melting them under high temperature, and stretching them to both sides at the same time, and finally forming a special waveguide structure in the form of a double cone in the heating area. By controlling the twist angle of the optical fiber and the length of the stretch, different splitting ratios can be obtained. Finally, the taper area is solidified on the quartz substrate with curing glue and inserted into the stainless steel tube. For the production of splitters with more paths, multiple two-way splitters can be used.
[0004] With more and more fiber optic communication equipment, the optical path is becoming more and more complicated. When an abnormality occurs, it is difficult to find the problem in time. Therefore, a fused taper is usually added in front of the conventional wavelength division multiplexing module, usually with a splitting ratio of 1 / 99%. The 1% end is used to monitor whether the optical path is normal. It can monitor whether the light entering the COM port is normal, or monitor whether the optical path in the DWDM channel is output normally, or use a 2-to-2 fused taper to monitor both ends at the same time.
[0005] However, the number of ports of the conventional 2-to-2 fused-taper splitter is large, resulting in a relatively large module size and the need to use multiple optical fibers to simultaneously monitor two optical paths. Utility Model Content
[0006] The utility model aims to provide a fused taper splitter and optical fiber isolator integrated device to solve the problems raised in the above background technology.
[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0008] A fused taper splitter and optical fiber isolator integrated device, comprising two fused taper splitters and an optical fiber isolator, wherein the two fused taper splitters are respectively a first splitter and a second splitter;
[0009] The first splitter, the second splitter, and the optical fiber isolator each have a port, and the first splitter, the second splitter, and the optical fiber isolator are connected end to end and integrated to form a three-port circulator structure.
[0010] The fused taper splitter and optical fiber isolator integrated device as described above: the first splitter forms a two-to-two fused taper splitter through four optical fibers, and the four optical fibers are optical fiber No. 1, optical fiber No. 3, first branching sub-optical fiber No. 1, and first branching sub-optical fiber No. 2;
[0011] The first branching optical fiber No. 1 and optical fiber No. 1 are distributed on the same side, with a splitting ratio of 99%:1%, and optical fiber No. 3 and the first branching optical fiber No. 2 are located on the other side, with a splitting ratio of 1%:99%;
[0012] The first branching optical fiber No. 1 is used as the optical input port optical fiber, and the first branching optical fiber No. 2 is used as the wavelength division multiplexing input port.
[0013] The integrated device of the fused taper splitter and optical fiber isolator as described above: the second splitter forms a one-to-two fused taper splitter through three optical fibers, the three optical fibers are optical fiber No. 1, optical fiber No. 2, and second branching sub-optical fiber;
[0014] The first splitter and the second splitter share optical fiber No. 1 and are directly connected via optical fiber No. 1; optical fiber No. 1 and optical fiber No. 2 are located on one side of the second splitter, and the second split sub-fiber is located on the other side as the input end of the second splitter and connected to the terminal port, and the splitting ratio of optical fiber No. 1 and optical fiber No. 2 is 50%:50%.
[0015] The integrated device of the fused taper splitter and optical fiber isolator as described above: one side of the optical fiber isolator shares optical fiber No. 2 with the second splitter, and the other side of the optical fiber isolator shares optical fiber No. 3 with the first splitter, and optical fiber No. 3 is connected to the input end of the optical fiber isolator, and optical fiber No. 2 is connected to the output end of the optical fiber isolator.
[0016] The integrated device of the fused taper splitter and optical fiber isolator as described above: one side of the optical fiber isolator shares optical fiber No. 2 with the second splitter, and the other side of the optical fiber isolator shares optical fiber No. 3 with the first splitter, and optical fiber No. 3 is connected to the output end of the optical fiber isolator, and optical fiber No. 2 is connected to the input end of the optical fiber isolator.
[0017] The integrated device of the fused taper splitter and optical fiber isolator as described above: the third optical fiber forms a single fiber collimator at the input end of the optical fiber isolator, and the second optical fiber forms another single fiber collimator at the output end of the optical fiber isolator.
[0018] The integrated device of the fused taper splitter and optical fiber isolator as described above: the optical fiber isolator is a bipolar optical fiber isolator.
[0019] Compared with the prior art, the beneficial effects of the utility model are as follows: in the utility model, there is no fusion point between the first splitter and the optical fiber isolator, and between the second splitter and the optical fiber isolator, so there is no fusion point between the two fused-taper splitters and the optical fiber isolator; and because the circulator structure formed after integration has three ports, it is possible to monitor the light input port and the light path output at the same time; compared with the conventional two-to-two fused-taper splitter, the number of ports is smaller, which can reduce the size of the module to a certain extent, and only one optical fiber is used to achieve the effect of simultaneously monitoring two optical paths. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 This is a schematic diagram of the structure of the integrated device of fused taper splitter and optical fiber isolator.
[0021] Figure 2 It is a schematic diagram of the structure of the first splitter in the integrated device of fused taper splitter and optical fiber isolator.
[0022] Figure 3 It is a schematic diagram of the structure of the second splitter in the integrated device of fused taper splitter and optical fiber isolator.
[0023] In the figure: 1-first splitter; 101-first branch sub-fiber No. 1; 102-first branch sub-fiber No. 2; 2-second splitter; 201-second branch sub-fiber; 3-fiber isolator; 4-fiber No. 1; 5-fiber No. 2; 6-fiber No. 3. DETAILED DESCRIPTION
[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.
[0025] Example 1
[0026] See also Figure 1 to Figure 3 As an embodiment of the utility model, the fused taper splitter and optical fiber isolator integrated device comprises two fused taper splitters and an optical fiber isolator 3, wherein the two fused taper splitters are respectively a first splitter 1 and a second splitter 2;
[0027] The first splitter 1, the second splitter 2, and the optical fiber isolator 3 each have a port, and the first splitter 1, the second splitter 2, and the optical fiber isolator 3 are connected end to end to each other and integrated to form a three-port circulator structure.
[0028] It should be noted that the first splitter 1 and the optical fiber isolator 3, as well as the second splitter 2 and the optical fiber isolator 3, are not connected by fusion integration, so there is no fusion point between the two fused-taper splitters and the optical fiber isolator 3; and because the circulator structure formed after integration has three ports, it is possible to monitor the light input port (COM port) and the optical path output at the same time; compared with the conventional two-to-two fused-taper splitter, the number of ports is less, which can reduce the size of the module to a certain extent, and only one optical fiber is used to achieve the effect of simultaneously monitoring two optical paths.
[0029] As a further solution of the utility model, the first splitter 1 forms a two-to-two fused taper splitter through four optical fibers, and the four optical fibers are respectively optical fiber No. 1 4, optical fiber No. 3 6, first branch No. 1 sub-optical fiber 101, and first branch No. 2 sub-optical fiber 102;
[0030] The first branching fiber No. 1 101 and the first fiber 4 are distributed on the same side, with a splitting ratio of 99%:1%, and the third fiber 6 and the first branching fiber No. 2 102 are located on the other side, with a splitting ratio of 1%:99%;
[0031] The first branching optical fiber No. 1 101 is used as the optical input port optical fiber, and the first branching optical fiber No. 2 102 is used as the wavelength division multiplexing input port.
[0032] In this embodiment, the optical signal is input from the COM end through the first branch sub-fiber 101, and is divided into two paths by the first splitter 1, one of which is output from the first branch sub-fiber 102 to the wavelength division multiplexing channel end (DWDM end), and this optical path is a reversible optical path.
[0033] As a further solution of the present invention, the second splitter 2 forms a one-to-two fused taper splitter through three optical fibers, and the three optical fibers are respectively a first optical fiber 4, a second optical fiber 5, and a second branching sub-optical fiber 201;
[0034] The first splitter 1 and the second splitter 2 share optical fiber No. 1 4 and are directly connected via optical fiber No. 1 4; optical fiber No. 1 4 and optical fiber No. 2 5 are located on one side of the second splitter 2, and the second splitting sub-fiber 201 is located on the other side as the input end (I NC end) of the second splitter 2 and connected to the terminal port (TP end), and the splitting ratio of optical fiber No. 1 4 and optical fiber No. 2 5 is 50%:50%.
[0035] In this embodiment, the optical signal at the TP end enters the second splitter 2 from the second branching sub-fiber 201 and is divided into two signals with equal splitting; one of the signals goes through the No. 1 optical fiber 4 to the first splitter 1, and then after being split by the first splitter 1, it is output to the DWDM end by the first branching No. 2 sub-fiber 102. This optical path is also a reversible optical path.
[0036] As a further solution of the utility model, one side of the optical fiber isolator 3 shares the second optical fiber 5 with the second splitter 2, and the other side of the optical fiber isolator 3 shares the third optical fiber 6 with the first splitter 1, and the third optical fiber 6 is connected to the input end (I NI end) of the optical fiber isolator 3, and the second optical fiber 5 is connected to the output end (OUT end) of the optical fiber isolator 3.
[0037] In this embodiment, the optical signal at the TP end enters the second splitter 2 from the second branching sub-fiber 201 and is divided into two signals with equal light splitting; one of the signals goes to the first splitter 1 through the first optical fiber 4, and the other goes to the optical fiber isolator 3 through the second optical fiber 5.
[0038] The optical signal is input from the COM end through the first branch sub-fiber 101, and is divided into two paths through the first splitter 1. One path is output from the first branch sub-fiber 102 to the DWDM end; the other path goes from the third optical fiber 6 to the optical fiber isolator 3, and goes to the second splitter 2 through the second optical fiber 5, and finally is introduced into the TP end through the second branch sub-fiber 201 through the IN-C end and output. The optical path is irreversible.
[0039] As a further solution of the present invention, the third optical fiber 6 forms a single-fiber collimator at the input end of the optical fiber isolator 3 , and the second optical fiber 5 forms another single-fiber collimator at the output end of the optical fiber isolator 3 .
[0040] When manufacturing the product, firstly, the first splitter 1 is manufactured by the melt-taper process, wherein the No. 3 optical fiber 6 on one side of the first splitter 1 is used to manufacture a single-fiber collimator for backup; then, the No. 1 optical fiber 4 and the No. 2 optical fiber 5 on the other side of the first splitter 1 are used to manufacture the second splitter 2 by the melt-taper process; after the second splitter 2 is manufactured, a single-fiber collimator is also manufactured by using the No. 2 optical fiber 5; finally, the single-fiber collimator manufactured by the No. 3 optical fiber 6 is used as the IN-I input end of the optical fiber isolator 3, and the single-fiber collimator manufactured by the No. 2 optical fiber 5 is used as the OUT output end product of the optical fiber isolator 3.
[0041] Finally, the first branch fiber 101 of the first splitter 1 is used as the COM port of the integrated device, the second branch fiber 201 of the second splitter 2 is used as the TP monitoring port of the integrated device, and the first branch fiber 102 of the first splitter 1 is used as the DWDM output port of the integrated device.
[0042] As a further solution of the utility model, the optical fiber isolator 3 is a bipolar optical fiber isolator, so that the single-fiber collimators made of the third optical fiber 6 and the second optical fiber 5 can be connected.
[0043] Example 2
[0044] Without changing the overall structure of the integrated device in Example 1, the input and output directions of the optical fiber isolator 3 are swapped, that is, one side of the optical fiber isolator 3 shares the second optical fiber 5 with the second splitter 2, and the other side of the optical fiber isolator 3 shares the third optical fiber 6 with the first splitter 1, and the third optical fiber 6 is connected to the output end (OUT end) of the optical fiber isolator 3, and the second optical fiber 5 is connected to the input end (INI end) of the optical fiber isolator 3.
[0045] In this way, the direction of the light path will change, as follows:
[0046] Light enters from the COM port, i.e., the first branch No. 1 sub-fiber 101, and is split into two paths by the first splitter 1. One path cannot pass through the No. 3 optical fiber 6 to the optical fiber isolator 3, and can only pass through the other path from the first branch No. 2 sub-fiber 102 to the DWDM channel. The optical path is reversible.
[0047] Light enters from the TP port, i.e., the first branch second sub-fiber 102, and is split into two paths by the second splitter 2. The first path goes from the first fiber 4 to the first splitter 1, and then goes to the DWDM channel through the first branch second sub-fiber 102 of the first splitter 1. The optical path is reversible.
[0048] The second path goes from the second optical fiber 5 to the optical fiber isolator 3, passes through the third optical fiber 6 of the optical fiber isolator 3 to the first splitter 1, and finally outputs from the COM port through the first branched first sub-optical fiber 101 of the first splitter 1.
[0049] The integrated structure of this device can be regarded as a three-port circulator, which can monitor the COM port and the DWDM channel port at the same time, but the loss generated in the DWDM channel is much smaller than that of a conventional circulator, only less than 0.2dB.
[0050] The above embodiments are exemplary rather than restrictive, so without departing from the spirit or basic features of the present invention, the technical solutions of the present invention that can be implemented in other specific forms are all included in the present invention.
Claims
1. A fused taper splitter and optical fiber isolator integrated device, comprising two fused taper splitters and an optical fiber isolator (3), characterized in that: The two fused taper splitters are respectively a first splitter (1) and a second splitter (2); The first splitter (1), the second splitter (2), and the optical fiber isolator (3) each have a port; the first splitter (1), the second splitter (2), and the optical fiber isolator (3) are connected end to end and integrated to form a three-port circulator structure.
2. The integrated device of a fused taper splitter and optical fiber isolator according to claim 1, characterized in that: The first splitter (1) forms a two-to-two fused taper splitter through four optical fibers, the four optical fibers being optical fiber No. 1 (4), optical fiber No. 3 (6), first branching first sub-optical fiber (101), and first branching second sub-optical fiber (102); The first branching optical fiber No. 1 (101) and the first optical fiber (4) are distributed on the same side, with a splitting ratio of 99%:1%, and the third optical fiber (6) and the first branching optical fiber No. 2 (102) are located on the other side, with a splitting ratio of 1%:99%; The first branching channel No. 1 sub-fiber (101) is used as the optical input port fiber, and the first branching channel No. 2 sub-fiber (102) is used as the wavelength division multiplexing input port.
3. The integrated device of a fused taper splitter and optical fiber isolator according to claim 2, characterized in that: The second splitter (2) forms a one-to-two type fused taper splitter through three optical fibers, the three optical fibers being respectively a first optical fiber (4), a second optical fiber (5), and a second branching sub-optical fiber (201); The first splitter (1) and the second splitter (2) share a first optical fiber (4) and are directly connected via the first optical fiber (4); the first optical fiber (4) and the second optical fiber (5) are located on one side of the second splitter (2); the second splitting sub-fiber (201) is located on the other side as an input end of the second splitter (2) and connected to a terminal port; and the splitting ratio of the first optical fiber (4) and the second optical fiber (5) is 50%:50%.
4. The integrated device of a fused taper splitter and optical fiber isolator according to claim 3, characterized in that: One side of the optical fiber isolator (3) shares a No. 2 optical fiber (5) with the second splitter (2), and the other side of the optical fiber isolator (3) shares a No. 3 optical fiber (6) with the first splitter (1), and the No. 3 optical fiber (6) is connected to the input end of the optical fiber isolator (3), and the No. 2 optical fiber (5) is connected to the output end of the optical fiber isolator (3).
5. The integrated device of a fused taper splitter and optical fiber isolator according to claim 3, characterized in that: One side of the optical fiber isolator (3) shares a No. 2 optical fiber (5) with the second splitter (2), and the other side of the optical fiber isolator (3) shares a No. 3 optical fiber (6) with the first splitter (1), and the No. 3 optical fiber (6) is connected to the output end of the optical fiber isolator (3), and the No. 2 optical fiber (5) is connected to the input end of the optical fiber isolator (3).
6. A fused taper splitter and optical fiber isolator integrated device according to any one of claims 4 or 5, characterized in that: The third optical fiber (6) forms a single-fiber collimator at the input end of the optical fiber isolator (3), and the second optical fiber (5) forms another single-fiber collimator at the output end of the optical fiber isolator (3).
7. A fused taper splitter and optical fiber isolator integrated device according to any one of claims 4 or 5, characterized in that: The optical fiber isolator (3) is a bipolar optical fiber isolator.