High-power splitter

Abstract

The utility model discloses a high power demultiplexer and a manufacturing method thereof, the high power demultiplexer comprises an outer sleeve double-fiber optical fiber head, the double-fiber optical fiber head is sleeved on the inner wall of one end of the outer sleeve, a first optical fiber and a second optical fiber are accommodated in the double-fiber optical fiber head, and the first optical fiber and the second optical fiber are arranged in parallel; the single-fiber optical fiber head is connected to the inner wall of the other end of the outer sleeve in a sleeving mode, and a third optical fiber is contained in the single-fiber optical fiber head; the light splitting lens is sleeved in the outer sleeve and located between the double-fiber optical fiber head and the single-fiber optical fiber head, and a light splitting film is formed on one side wall, close to the single-fiber optical fiber head, of the light splitting lens. In the transmission path of the optical signal, because there is no glue connection part, the glue is not irradiated when the optical signal is transmitted, and the problem that the light transmission efficiency is reduced due to the fact that the glue is heated does not exist.

Description

Technical Field

[0001] The utility model relates to the technical field of splitters, in particular to a high-power splitter. Background Art

[0002] Splitters are widely used in optical communications, laser radar and laser welding. Common splitters are classified into planar waveguide type and fiber taper type according to the process. The structure of planar waveguide splitter is as follows: Figure 2 As shown, it includes an optical fiber head 1, a splitter chip 2, and an optical fiber array 3. The core component, the splitter chip 2, is designed with a splitter waveguide of a corresponding shape according to the wavelength and ratio of the optical signal to be split. The optical signal is input from the optical fiber head 1, enters the splitter chip 2, is split, and enters the optical fiber array 3 from the output end. The splitter chip 2 of this type of product is bonded to the optical fiber head 1 and the optical fiber array 3 with optical path adhesive.

[0003] Therefore, there are obvious defects in high-power transmission applications: the high-temperature resistance of glue is generally lower than 150°C, and impurities and bubbles are prone to appear. The heat of the signal light accumulates in the impurities and bubbles, causing the glue temperature to exceed the tolerance range, affecting the parameters and reliability.

[0004] Another type of fiber taper splitter is the principle of melting multiple optical fibers together through high-voltage discharge technology, thereby achieving energy splitting of the input optical signal at the welding part. Figure 3 As shown, optical fiber 1 and optical fiber 2 are subjected to high voltage discharge to form a fused portion 3. This solution is limited by the principle of optical fiber fusion taper, and the fusion length determines the splitting ratio of the optical signal wavelength. Therefore, the disadvantage is that the splitting ratio accuracy is low, generally only able to meet ±3%, and the wider the required bandwidth, the greater the tolerance.

[0005] Therefore, a high power splitter is still needed to solve the above problems. Utility Model Content

[0006] The utility model provides a high-power splitter and a manufacturing method thereof to solve the above problems.

[0007] The purpose of the utility model is achieved by the following technical solutions:

[0008] A first aspect discloses a high power splitter, comprising:

[0009] Outer sleeve;

[0010] A dual-fiber optical fiber head, wherein the dual-fiber optical fiber head is sleeved on the inner wall of one end of the outer sleeve, wherein a first optical fiber and a second optical fiber are accommodated inside the dual-fiber optical fiber head, and the first optical fiber and the second optical fiber are arranged in parallel;

[0011] A single-fiber optical fiber head, wherein the single-fiber optical fiber head is sleeved on the inner wall of the other end of the outer sleeve, and a third optical fiber is accommodated inside the single-fiber optical fiber head;

[0012] The beam splitter lens is sleeved in the outer sleeve and located between the dual-fiber optical fiber head and the single-fiber optical fiber head. A beam splitter film is formed on one side wall of the beam splitter lens close to the single-fiber optical fiber head.

[0013] In one embodiment, a first connecting tube is sleeved on the inner side of one end of the outer sleeve close to the dual-fiber optical fiber head, and the outer sleeve is sleeved on at least a portion of the side wall of the dual-fiber optical fiber head through the first connecting tube;

[0014] A second connecting tube is sleeved on the inner side of one end of the outer sleeve close to the single-fiber optical fiber head, and the outer sleeve is sleeved on at least a portion of the side wall of the single-fiber optical fiber head through the second connecting tube.

[0015] In one embodiment, a third connecting tube is further included, and the inner wall of the tube cavity of the third connecting tube is sleeved with at least part of the dual-fiber optical fiber head and at least part of the side wall of the splitter lens.

[0016] In one embodiment, a collimator is also included. The collimator and the single-fiber optical fiber head are arranged adjacent to each other and are connected by a second connecting tube. The second connecting tube is connected to the inner wall of the lumen of the outer sleeve, so that after the optical signal is input from the first optical fiber, the optical signal reflected by the spectrometer is output through the second optical fiber, and the optical signal transmitted through the spectrometer is output through the third optical fiber.

[0017] In one embodiment, an adhesive is further filled between the inner wall of the lumen of the outer sleeve and the first connecting sleeve, and / or the second connecting sleeve, and / or the third connecting sleeve;

[0018] The inner walls of the first connecting pipe sleeve, the second connecting pipe sleeve and the third connecting pipe sleeve are also coated with adhesive.

[0019] Compared with the prior art, the beneficial effects of the present invention include at least:

[0020] Insert the dual-fiber optical fiber head and the single-fiber optical fiber head into the outer sleeve in sequence, and coat the end surface of the spectroscopic lens with a spectroscopic film. The light input through the first optical fiber enters from one end of the outer sleeve, and is reflected by the spectroscopic film to form a reflected light signal. The reflected light signal is emitted through the second optical fiber, and the part that passes through the spectroscopic film enters the third optical fiber and is input. In the transmission path of the optical signal, since there is no glue connection, the optical signal will not irradiate the glue during transmission, and there will be no problem of glue heating up, which will lead to a decrease in light transmission efficiency.

[0021] In addition, the light-transmitting surface of the beam splitter lens is directly coated with a beam splitter film, which facilitates the control of the film layer design and ensures the accuracy of the beam splitting ratio and the bandwidth.

[0022] In addition, the dual-fiber optical fiber head, the single-fiber optical fiber head and the spectroscopic lens are assembled by sleeve connection of the outer sleeve, which makes it easy to check the reliability of the product during assembly and solves the process problem. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a high-power splitter according to an embodiment of the utility model;

[0024] Figure 2 It is a structural schematic diagram of a splitter 1 in the prior art;

[0025] Figure 3 It is a structural schematic diagram of a splitter 2 in the prior art.

[0026] In the figure: 1. single-fiber optical fiber head; 2. collimator; 3. second connecting tube; 4. spectroscopic lens; 5. dual-fiber optical fiber head; 6. third connecting tube; 7. first connecting tube; 8. outer sleeve; 11. first optical fiber; 12. second optical fiber; 13. third optical fiber. DETAILED DESCRIPTION

[0027] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to make the present invention more comprehensive and complete and to fully convey the concepts of example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted.

[0028] The words expressing positions and directions described in the present utility model are all explained by taking the drawings as examples, but they can be changed as needed, and all the changes are included in the protection scope of the present utility model.

[0029] Reference Figure 3 The utility model provides a high-power splitter, comprising: an outer sleeve 8, a dual-fiber optical fiber head 5, a single-fiber optical fiber head 1 and a splitter lens 4.

[0030] The dual-fiber optical fiber head 5 is sleeved on the inner wall of one end of the outer sleeve 8, and the interior of the dual-fiber optical fiber head 5 contains a first optical fiber 11 and a second optical fiber 12, and the first optical fiber 11 and the second optical fiber 12 are arranged in parallel. The single-fiber optical fiber head 1 is sleeved on the inner wall of the other end of the outer sleeve 8, and the interior of the single-fiber optical fiber head 1 contains a third optical fiber 13. The spectroscopic lens 4 is sleeved in the outer sleeve 8 and is located between the dual-fiber optical fiber head 5 and the single-fiber optical fiber head 1, and a spectroscopic film is formed on one side wall of the spectroscopic lens 4 close to the single-fiber optical fiber head 1. For example, when manufacturing the dual-fiber optical fiber head 5, the first optical fiber 11 and the second optical fiber 12 are implanted in parallel, wherein the ports of the first optical fiber 11 and the second optical fiber 12 are located on the same side, and the port of the third optical fiber 13 is located on the other side.

[0031] The dual-fiber optical fiber head 5, the beam splitter lens 4 and the single-fiber optical fiber head 1 are sleeved in sequence inside the outer sleeve 8. The adhesive does not directly act on the optical path and is not connected between the dual-fiber optical fiber head 5, the beam splitter lens 4 and the single-fiber optical fiber head 1. Instead, the dual-fiber optical fiber head 5, the beam splitter lens 4 and the single-fiber optical fiber head 1 are sleeved by the outer sleeve 8, and the connection is completed by the contact between the inner wall and the side wall and the adhesive filling. There is no problem that the adhesive on the optical path will increase in temperature and reduce the transmission efficiency as the high-power optical signal is output. In addition, the light entering through the first optical fiber 11 can be accurately reflected and transmitted according to the preset splitting ratio through the beam splitter film at the right end of the beam splitter lens 4, and is respectively output after reflection from the second optical fiber 12 and transmitted from the third optical fiber 13. The beam splitter film is directly plated on one side of the beam splitter lens 4 to avoid the problem that the beam splitting ratio is not accurate due to the melting welding of the beam splitter chip and the optical fiber, thereby affecting the spectral resolution, transmittance and other parameters of the application equipment.

[0032] In one embodiment, a first connecting tube 7 is sleeved on the inner side of one end of the outer sleeve 8 near the dual-fiber optical fiber head 5, and the outer sleeve 8 sleeves at least a portion of the side wall of the dual-fiber optical fiber head 5 through the first connecting tube 7. The first connecting tube 7 is sleeved between the dual-fiber optical fiber head 5 and the outer sleeve 8, wherein the material of the first connecting tube 7 is, for example, glass or ceramic material, and the inner wall of the first connecting tube 7 sleeves a section of the outer side wall of the dual-fiber optical fiber head 5, which plays a role of holding and supporting the section of the dual-fiber optical fiber head 5 near the outer side, preventing the rear end of the dual-fiber optical fiber head 5 from shifting in the radial direction of the optical fiber during operation, resulting in the optical signal of the first optical fiber 11 being unable to be stably and continuously sent to the splitter lens 4, and entering the second optical fiber 12 after reflection from the splitter lens 4, and entering the third optical fiber 13 after transmission, affecting the signal transmission efficiency of the communication device.

[0033] A second connecting tube 3 is sleeved on the inner side of one end of the outer sleeve 8 close to the single-fiber optical fiber head 1, and the outer sleeve 8 sleeves at least part of the side wall of the single-fiber optical fiber head 1 through the second connecting tube 3. The outer tube wall of the second connecting tube 3 abuts against the inner wall of the outer sleeve 8, and the inner tube wall of the second connecting tube 3 abuts against the outer wall of the single-fiber optical fiber head 1, to prevent the third optical fiber 13 from being unable to efficiently receive the optical signal transmitted from the first optical fiber 11 through the spectroscopic lens 4 due to the radial displacement of the single-fiber optical fiber head 1 relative to the outer sleeve 8 during operation. It plays a role of stable clamping. And the second connecting tube 3 surrounding the circumference of the single-fiber optical fiber head 1 plays the role of connecting the single-fiber optical fiber head 1 and the outer sleeve 8. In the transmission path of light, there will be no adhesive for light to pass through, thereby fundamentally avoiding the adhesive from heating up after being exposed to light, resulting in the failure of normal transmission of the optical signal.

[0034] In one embodiment, a third connecting tube 6 is further included, and the inner wall of the tube cavity of the third connecting tube 6 is sleeved with at least part of the side wall of the dual-fiber optical fiber head 5 and at least part of the side wall of the splitter lens 4. The inner wall of the third connecting tube 6 abuts against the two adjacent ends of the dual-fiber optical fiber head 5 and the end side wall of the splitter lens 4, respectively. The third connecting tube 6 can be a hard glass tube or a ceramic tube. When connected, the third connecting tube 6 is connected to the docking part of the dual-fiber optical fiber head 5 and the splitter lens 4, which is convenient for controlling the distance between the dual-fiber optical fiber head 5 and the splitter lens 4, so as to control the splitting ratio of the light output by the first optical fiber 11, and avoid the distance between the two changing during operation, which causes fluctuations in the optical signal transmission, or even blocking, so as to affect the normal transmission of the optical path. At the same time, the third connecting tube 6 is sleeved on the peripheral side of the optical path to avoid the adhesive heating up on the optical path transmission path and reducing the normal transmission efficiency of the optical path.

[0035] In one embodiment, a collimator 2 is also included. The collimator 2 and the single-fiber optical fiber head 1 are arranged adjacent to each other. The collimator 2 and the single-fiber optical fiber head 1 are sleeved by a second connecting tube 3 and connected to the inner wall of the tube cavity of the outer sleeve 8, so that after the optical signal is input from the first optical fiber 11, the optical signal reflected by the spectroscopic film is output through the second optical fiber 12, and the optical signal transmitted through the spectroscopic film is output through the third optical fiber 13. The interior of the third connecting tube 6 can also be sleeved with a collimator 2 with a collimating and converging function for light. The third connecting tube 6 abuts against the outer wall of the collimator 2 in a manner of abutting the inner wall. When working, the relative position of the collimator 2 and the single-fiber optical fiber head 1 can be avoided from changing, ensuring that the light after passing through the collimator 2 falls accurately on the second optical fiber 12, ensuring that the optical signal on the optical path can be transmitted stably, accurately and efficiently. At the same time, during assembly, the third optical fiber 13 and the single-fiber optical fiber head 1 are both sleeved in the same third connecting tube 6, which is convenient for controlling the distance between the third optical fiber 13 and the single-fiber optical fiber head 1. The modular assembly method makes it convenient to control and debug the efficiency of the optical path transmission locally, so as to control the efficiency of the optical path transmission as a whole.

[0036] In one embodiment, adhesive is also filled between the inner wall of the tube cavity of the outer sleeve 8 and the first connecting tube 7 sleeve, and / or the second connecting tube 3 sleeve, and / or the third connecting tube 6 sleeve. When the first connecting tube 7 sleeve, the second connecting tube 3 sleeve and the third connecting tube 6 sleeve are connected to the outer sleeve 8, the relative positions of the first connecting tube 7 sleeve, the second connecting tube 3 sleeve and the third connecting tube in the outer sleeve 8 can be fixed by adhesive to ensure that the optical signal input from the first optical fiber 11 can be stably transmitted to the second optical fiber 12 and the third optical fiber 13. The adhesive is located between the outer sleeve 8 and the first connecting tube, the second connecting tube 3 sleeve and the third connecting tube, and the optical signal will not be irradiated on the adhesive, so that a high signal transmission efficiency can be maintained under various optical signal transmission environments during operation.

[0037] The inner walls of the first connecting tube 7, the second connecting tube 3 and the third connecting tube 6 are also coated with adhesive. The inner wall of the first connecting tube can fix the dual-fiber optical fiber head 5 through adhesive, the inner wall of the second connecting tube 3 can fix the dual-fiber optical fiber head 5 and the splitter lens 4 through adhesive, and the inner wall of the third connecting tube 6 can fix the single-fiber optical fiber head 1 and the collimator 2 through adhesive. When working, it can stably support the relative positions of the components on the optical path, avoid position displacement due to external vibration or impact, and reduce the transmission efficiency and transmission quality of the optical signal. And when assembling, it can be fixed in a modular assembly method, which is convenient for accurately controlling the transmission quality and transmission efficiency of the optical path from each link, thereby improving the efficiency of the overall splitter after assembly.

[0038] The utility model also provides a method for manufacturing a high-power splitter, comprising:

[0039] S1: insert the single-fiber optical fiber head 1 and the collimator 2 into the second connecting tube 3 in sequence and fix them.

[0040] In one embodiment, the S1 includes:

[0041] S11: inserting the single-fiber optical fiber head 1 from one end of the second connecting tube 3. The single-fiber optical fiber head 1 can be clamped manually or by a mechanical arm, and inserted into the inner tube groove of the second connecting tube 3.

[0042] S12: insert the collimator 2 from the other end of the second connecting tube 3. The collimator 2 may also be inserted into the second connecting tube 3 manually or by clamping the collimator 2 with a mechanical arm.

[0043] S13: Pass an optical signal into the single-fiber optical head 1, and adjust the distance between the single-fiber optical head 1 and the collimator 2 until collimated light is output after passing through the collimator 2. The optical signal can be passed into the single-fiber optical head 1, and the distance between the single-fiber optical head 1 and the collimator 2 can be adjusted to calibrate the transmission efficiency between the single-fiber optical head 1 and the collimator 2, and fix the position. The matching relationship between the single-fiber optical head 1 and the collimator 2 on the optical path can be conveniently debugged in the same second connecting tube 3.

[0044] S14: Inject adhesive into the gap between the second connecting tube 3 and the single fiber head 1 after the distance is fixed, and into the gap between the second connecting tube 3 and the collimator 2. The adhesive is, for example, epoxy glue. After the position is corrected, the adhesive can be injected into the preset gap in the second connecting tube 3 using an injection device, and wait for curing to complete the fixation.

[0045] S2: insert the dual-fiber optical fiber head 5 and the beam splitter lens 4 into the third connecting tube 6 in sequence and fix them.

[0046] The S2 includes:

[0047] S21: insert the dual-fiber optical fiber head 5 from one end of the third connecting tube 6. The dual-fiber optical fiber head 5 can be inserted into one end of the third connecting tube 6 manually or by clamping with a robot arm.

[0048] S22: Insert the beam splitter lens 4 from the other end of the third connecting tube 6. The beam splitter lens 4 is inserted from the other end of the third connecting tube 6.

[0049] S3: Insert the third connecting tube 6 and the second connecting tube 3 into the outer sleeve 8 and adjust the distance between the single-fiber optical fiber head 1 and the dual-fiber optical fiber head 5, and fill the adhesive in the gap between the third connecting tube 6 and the outer sleeve 8, and the first connecting tube 7 and the outer sleeve 8.

[0050] S31: An optical signal is introduced into the first optical fiber 11. An optical signal is introduced into the first optical fiber 11. The optical signal may be a test signal output by an external test device.

[0051] S32: The relative positions of the second connecting tube 3 and the third connecting tube 6 are moved in the outer sleeve 8 until the optical signals are simultaneously output from the second optical fiber 12 and the third optical fiber 13. The position between the second connecting tube 3 and the third connecting tube 6 is adjusted and moved manually or with the aid of a tool until the output optical signals are received from the second optical fiber 12 and the third optical fiber 13, and the position correction is stopped.

[0052] S33: Fill the gap between the third connecting tube 6 and the dual-fiber optical head 5, and the gap between the third connecting tube 6 and the spectroscopic lens 4. Fill the third connecting tube 6 with adhesive to initially fix the dual-fiber optical head 5 and the spectroscopic lens 4 at this position and cure.

[0053] S34: Fill the third connecting tube 6 and the outer tube 8 with adhesive. After the dual-fiber optical head 5 and the beam splitter lens 4 are solidified at the designated positions in the third connecting tube 6, the adhesive is injected into the gap between the third connecting tube 6 and the outer tube 8 for bonding and solidification.

[0054] In one embodiment, the manufacturing method further includes S4: inserting the first connecting tube 7 between the dual-fiber optical fiber head 5 and the outer sleeve 8, and filling the adhesive between the first connecting tube 7 and the outer sleeve 8, and between the first connecting tube 7 and the dual-fiber optical fiber head 5. When the internal beam splitter lens 4 and the dual-fiber optical fiber head 5 are fixed in position, the first connecting tube 7 is finally sleeved between the dual-fiber optical fiber head 5 and the outer sleeve 8, and then the adhesive can be injected between the inner wall and the outer wall of the first connecting tube 7 by using a needle or other forms, and then solidified.

[0055] The method of making a high-power splitter using the above steps is convenient for sub-module detection and assembly of the combined module of the single-fiber optical fiber head 1 and the collimator 2 in the second sleeve, and is convenient for controlling and calibrating the optical path transmission efficiency of the single-fiber optical fiber head 1 and the collimator 2. After the components in the second sleeve are fixed, the positions of the two components inside the third connecting tube 6 are adjusted, which is convenient for operators or assemblers or automated assembly equipment to calibrate under the condition of passing detection light, and is convenient for determining the spacing and position between the dual-fiber optical fiber head 5 and the splitter lens 4, and determining the transmission efficiency of the optical signal from the overall mechanism.

[0056] Furthermore, in the light transmission path, the position where the adhesive is located is not transparent, so there will be no problem of affecting the optical performance, and the dichroic film arranged on one side of the dichroic lens 4 facilitates the control of the dichroic ratio during production.

[0057] Although the embodiments of the utility model have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the utility model. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the utility model without departing from the principles and purpose of the utility model. All of these changes should fall within the scope of protection of the claims of the utility model.

Claims

1. A high power splitter, It is characterized in that include: Outer sleeve; A dual-fiber optical fiber head, wherein the dual-fiber optical fiber head is sleeved on the inner wall of one end of the outer sleeve, wherein a first optical fiber and a second optical fiber are accommodated inside the dual-fiber optical fiber head, and the first optical fiber and the second optical fiber are arranged in parallel; A single-fiber optical fiber head, wherein the single-fiber optical fiber head is sleeved on the inner wall of the other end of the outer sleeve, and a third optical fiber is accommodated inside the single-fiber optical fiber head; The beam splitter lens is sleeved in the outer sleeve and located between the dual-fiber optical fiber head and the single-fiber optical fiber head. A beam splitter film is formed on a side wall of the beam splitter lens close to the single-fiber optical fiber head.

2. The high power splitter according to claim 1, It is characterized in that A first connecting tube is sleeved on the inner side of one end of the outer sleeve close to the dual-fiber optical fiber head, and the outer sleeve is sleeved on at least a part of the side wall of the dual-fiber optical fiber head through the first connecting tube; A second connecting tube is sleeved on the inner side of one end of the outer sleeve close to the single-fiber optical fiber head, and the outer sleeve is sleeved on at least a portion of the side wall of the single-fiber optical fiber head through the second connecting tube.

3. The high power splitter according to claim 2, It is characterized in that It also includes a third connecting tube, the inner wall of the tube cavity of the third connecting tube is sleeved with at least part of the dual-fiber optical fiber head and at least part of the side wall of the splitter lens.

4. The high power splitter according to claim 3, It is characterized in that It also includes a collimator, which is arranged adjacent to the single-fiber optical fiber head and is connected via a second connecting tube, and the second connecting tube is connected to the inner wall of the lumen of the outer sleeve, so that after the optical signal is input from the first optical fiber, the optical signal reflected by the spectrometer is output through the second optical fiber, and the optical signal transmitted through the spectrometer is output through the third optical fiber.

5. The high power splitter according to claim 2 or 3, It is characterized in that An adhesive is also filled between the inner wall of the lumen of the outer sleeve and the first connecting sleeve, and / or the second connecting sleeve, and / or the third connecting sleeve; The inner walls of the first connecting pipe sleeve, the second connecting pipe sleeve and the third connecting pipe sleeve are also coated with adhesive.

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