Optical device, preparation method thereof and micro pump

Abstract

The invention relates to the technical field of optical devices, in particular to an optical device, a preparation method thereof and a micro pump. The optical device comprises a shell, an optical fiber and a glass tube; one end of the glass tube is installed on the shell, an optical fiber via hole extending in the axial direction is formed in the glass tube, a flaring end hole is formed in the end, away from the shell, of the optical fiber via hole, and the size of an opening of the flaring end hole is enlarged from inside to outside; the optical fiber penetrates out of the shell, penetrates into the optical fiber through hole and is led out from the flaring end hole; a first buffer bonding layer is arranged at the end, where the flaring end hole is located, of the glass tube, and the optical fiber is wrapped by the first buffer bonding layer. According to the optical device, high optical fiber side pulling protection performance can be guaranteed, the size of the tail fiber part of the optical device is small, miniaturization is facilitated, and assembling is convenient.

Description

Technical Field

[0001] The invention relates to the technical field of optical devices, in particular to an optical device and a preparation method thereof, and a micro pump. Background Art

[0002] Optical devices are basic components in optical communication networks. They undertake functions such as generation, modulation, detection, reception, connection, transmission, transmission, wavelength division multiplexing and demultiplexing, optical path conversion, signal amplification, and photoelectric conversion of optical signals. These devices represent a high degree of integration of modern optoelectronic technology and microelectronic technology, and are a key component of information and communication technology.

[0003] like Figure 1 As shown, conventional optical devices with optical fibers generally use a pigtail structure of a rubber cap 5 or a rubber cap / plastic tube, which has a high optical fiber side pull protection performance, but the disadvantage is that the pigtail part of the optical device is too large. In the assembly of the current miniaturized erbium-doped fiber amplifier (EDFA) or coherent module, the module has very limited space for placing the optical device, especially the position of the tail tube of the optical device. An oversized pigtail structure will cause interference, fail to meet the requirements, and be difficult to assemble. Summary of the invention

[0004] The embodiments of the present invention provide an optical device and a preparation method thereof, and a micro pump to solve the problem that the optical device with high optical fiber side pull protection performance in the prior art has a large pigtail part, is difficult to miniaturize, and is difficult to assemble.

[0005] The present invention discloses an optical device, comprising a shell, an optical fiber and a glass tube; one end of the glass tube is installed on the shell, and the glass tube has an optical fiber through hole extending along the axial direction, and the end of the optical fiber through hole away from the shell is provided with an expanded end hole, and the opening size of the expanded end hole expands from the inside to the outside; the optical fiber passes through the shell and into the optical fiber through hole, and is led out from the expanded end hole; a first buffer adhesive layer is provided on the end of the glass tube where the expanded end hole is located, and the first buffer adhesive layer wraps the optical fiber.

[0006] Optionally, the first buffer adhesive layer includes a first glue layer, and the first glue layer is adhered to one end of the glass tube where the expanded end hole is located; the first glue layer is semicircular and semi-elliptical.

[0007] Optionally, the first buffer layer includes a second glue layer, and the second glue layer adheres to and covers the first glue layer; the second glue layer is conical.

[0008] Optionally, the hardness of the first glue layer is 60-70D.

[0009] Optionally, the hardness of the second glue layer is greater than the hardness of the first glue layer.

[0010] Optionally, the optical fiber through hole and the expanded end hole are filled with fixing material.

[0011] Optionally, a tail pipe is provided on the shell, and the glass tube is inserted into the tail pipe.

[0012] The present invention also discloses a method for preparing an optical device, which is applied to the preparation of the above optical device and comprises the steps of:

[0013] A glass tube is provided, wherein the glass tube has an optical fiber through hole extending in the axial direction, and an expanded end hole is provided at one end of the optical fiber through hole away from the housing, and the opening size of the expanded end hole expands from the inside to the outside;

[0014] Passing the glass tube onto the optical fiber led out from the housing, and installing the end of the glass tube away from the expanded end hole on the housing, and the optical fiber is led out from the expanded end hole;

[0015] A first buffer adhesive layer is arranged on one end of the glass tube where the expanded end hole is located, and the first buffer adhesive layer wraps the optical fiber.

[0016] Optionally, before the step of providing the first buffer adhesive layer, the preparation method further comprises the steps of:

[0017] The fiber-through holes and the expanded end holes are filled with fixing material.

[0018] The present invention also discloses a micro pump, comprising the above optical device, or comprising the optical device prepared by the above preparation method.

[0019] Compared with the prior art, the optical device provided by the embodiment of the present invention has the following beneficial effects: the optical device of the present invention uses a glass tube as a fixing component for the optical fiber to be led out from the rear of the housing, wherein the use of a glass tube enables the selection of a smaller glass tube, thereby reducing the size of the pigtail part, and at the same time, the optical fiber passes through the optical fiber via hole and the flared end hole respectively, and a first buffer adhesive layer is provided on the end of the glass tube where the flared end hole is located, and the first buffer adhesive layer wraps and fixes the optical fiber. In this way, when the optical fiber is deformed and slightly displaced by side pulling, the flared end hole can guide the optical fiber in the glass tube to bend in an arc shape, thereby avoiding the following problems: Figure 2The right-angled edge of the glass tube shown in the figure can prevent the cutting damage to the optical fiber, and at the same time, the first buffer adhesive layer has good bonding and buffering performance with the glass tube, ensuring that the optical fiber outlet is not likely to be separated from the glass tube during damp heat testing (damp heat) and side pulling, and can guide the optical fiber outside the glass tube to deform in an arc during side pulling, preventing the optical fiber from deforming at a large angle over a short distance and breaking, and ensuring the side pulling performance of the optical device. Therefore, the optical device of the present invention can ensure high optical fiber side pulling protection performance, and the size of the optical device pigtail part is small, which is conducive to miniaturization and easy to assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments, in which:

[0021] Figure 1 It is a schematic diagram of a conventional optical device with fiber optics;

[0022] Figure 2 It is a schematic diagram of the glass tube optical fiber via opening as a right angle side;

[0023] Figure 3 is a perspective view of an optical device according to an embodiment of the present invention;

[0024] Figure 4 is a cross-sectional view of a glass tube according to an embodiment of the present invention;

[0025] Figure 5 is a schematic diagram of optical fiber side pulling of an optical device according to an embodiment of the present invention;

[0026] Figure 6 It is a perspective view of the optical fiber side-pull of the optical device according to the embodiment of the present invention.

[0027] The reference numerals in the figures are:

[0028] 1. Shell; 11. Tail pipe; 2. Optical fiber; 3. Glass tube; 31. Optical fiber via hole; 32. Expanded end hole; 4. First buffer adhesive layer; 41. First glue layer; 42. Second glue layer; 5. Rubber cap. DETAILED DESCRIPTION

[0029] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. Now, in conjunction with the accompanying drawings, the preferred embodiments of the present invention are described in detail.

[0030] An embodiment of the present invention provides an optical device, such as Figures 3 to 6As shown, the optical device includes a shell 1, an optical fiber 2 and a glass tube 3; one end of the glass tube 3 is installed on the shell 1, and the glass tube 3 has an optical fiber through hole 31 extending axially, and the end of the optical fiber through hole 31 away from the shell 1 is provided with an expanded end hole 32, and the opening size of the expanded end hole 32 expands from the inside to the outside; the optical fiber 2 passes through the shell 1 and into the optical fiber through hole 31, and is led out from the expanded end hole 32; a first buffer adhesive layer 4 is provided on the end of the glass tube 3 where the expanded end hole 32 is located, and the first buffer adhesive layer 4 wraps the optical fiber 2.

[0031] The optical device of the present invention uses a glass tube 3 as a fixing component for the optical fiber 2 to be led out from the rear of the housing 1, wherein the use of the glass tube 3 enables the selection of a glass tube 3 of a smaller size, thereby reducing the size of the pigtail part. At the same time, the optical fiber 2 passes through the optical fiber via hole 31 and the flared end hole 32 respectively, and a first buffer adhesive layer 4 is provided on the end of the glass tube 3 where the flared end hole 32 is located, and the first buffer adhesive layer 4 wraps and fixes the optical fiber 2. In this way, when the optical fiber 2 is deformed and slightly displaced by side pulling, the flared end hole 32 can guide the optical fiber 2 in the glass tube 3 to bend in an arc shape, thereby avoiding the following problems: Figure 2 The right-angled edge of the glass tube 3 shown in the figure does not damage the optical fiber 2 by cutting. At the same time, the first buffer adhesive layer 4 has good bonding and buffering properties with the glass tube 3, ensuring that the optical fiber 2 is not easily separated from the glass tube 3 at the fiber outlet during damp heat testing (damp heat) and side pulling, and can guide the optical fiber 2 outside the glass tube 3 to deform in an arc during side pulling, preventing the optical fiber 2 from breaking due to short-distance large-angle deformation, thereby ensuring the side pulling performance of the optical device. Therefore, the optical device of the present invention can ensure a high side pulling protection performance of the optical fiber 2, and the size of the optical device pigtail part is small, which is conducive to miniaturization and easy to assemble.

[0032] Specifically, the expanded end hole 32 is formed by R-shaped chamfering and can be in the shape of a truncated cone. The side-pull performance of the optical fiber 2 refers to the performance of the optical fiber 2 when subjected to lateral tension, which includes the mechanical strength and tensile strength of the optical fiber 2 under the action of the lateral tension, as well as the resulting changes in the characteristics of the optical fiber 2. In the miniaturization of optical devices and the construction and maintenance of optical fiber 2 communication networks, the side-pull performance of the optical fiber 2 is an important consideration. When the optical fiber 2 is side-pulled, such as Figure 5 and Figure 6 shown.

[0033] Specifically, the first buffer adhesive layer 4 includes a first glue layer 41, which is adhered to the end of the expanded end hole 32 on the glass tube 3; the first glue layer 41 is semicircular and semi-elliptical. The first glue layer 41 can provide good adhesion and buffering performance during side pulling. The problem of the first glue layer 41 detaching is not easy to occur. In addition, the semicircular and semi-elliptical shapes of the first glue layer 41 help guide the optical fiber 2 to bend along a smooth arc when side pulling, rather than generating stress concentration at right angles or sharp edges, which helps to reduce the risk of damage to the optical fiber 2 during bending. Due to the buffering effect of the first glue layer 41, when the optical fiber 2 is subjected to lateral tension, it can absorb part of the stress and reduce the force directly acting on the optical fiber 2, thereby improving the side pulling protection performance of the optical fiber 2. That is, the design of the first glue layer 41 helps to disperse and absorb stress through its shape and bonding characteristics when the optical fiber 2 is subjected to lateral tension, thereby reducing the risk of the optical fiber 2 being broken due to side pulling.

[0034] Specifically, the hardness of the first glue layer 41 is 60-70D. In this solution, the hardness of the first glue layer 41 is 60-70D, which is moderate, neither too hard nor too soft. Too hard will make the optical fiber 2 lack the necessary elasticity when it is stressed, while too soft may not provide sufficient support. Moderate hardness helps to maintain the stability of the optical fiber 2 while allowing a certain flexibility, thereby reducing the stress concentration of the optical fiber 2 when it is stressed, providing good elasticity, and supporting the root of the optical fiber 2 during lateral pulling to prevent the optical fiber 2 from deforming too much at the expanded end hole 32. When the optical fiber 2 is subjected to lateral tension, the first glue layer 41 at this hardness can absorb and disperse part of the force, reduce the direct impact on the optical fiber 2, and thus reduce the risk of the optical fiber 2 breaking. At the same time, the first glue layer 41 with a hardness of 60-70D can form a good bond between the glass tube 3 and the optical fiber 2, ensuring that the first glue layer 41 will not fall off under various environmental conditions (such as temperature changes, humidity changes, etc.), and maintaining the long-term stability of the optical fiber 2.

[0035] The first buffer layer includes a second glue layer 42, which adheres to and covers the first glue layer 41; the second glue layer 42 is conical. The second glue layer 42 is further coated on the first glue layer 41, and the second glue layer 42 and the first glue layer 41 guide the optical fiber 2 outside the glass tube 3 to deform in an arc when pulled sideways, so as to prevent the optical fiber 2 from being deformed and broken at a large angle over a short distance. Specifically, the double-layer buffer structure in which the second glue layer 42 adheres to and covers the first glue layer 41 can provide additional mechanical support, enhance the stability of the overall structure, and reduce the risk of the optical fiber 2 breaking due to side pulling. The conical design of the second glue layer 42 helps to guide the optical fiber 2 to bend along a smooth conical surface when pulled sideways. Such a geometric shape can more effectively disperse stress and reduce the risk of damage to the optical fiber 2 during bending. The conical second glue layer 42 can provide a better buffering effect when the optical fiber 2 is subjected to lateral tension, reduce the force directly acting on the optical fiber 2, and thus reduce the risk of the optical fiber 2 breaking. Moreover, the bonding performance of the second glue layer 42 can further ensure the tight bonding between the optical fiber 2 and the glass tube 3, and can remain stable even in an environment with temperature and humidity changes. The hardness of the second glue layer 42 is greater than the hardness of the first glue layer 41, for example, it can be 80 to 90D, for example, 80D, 81D, 82D, 83D, 84D, 85, 86D, 87D, 88D, 89D, 90D, etc. The hardness of the second glue layer 42 is slightly greater than the hardness of the first glue layer 41. The first glue layer 41 is a part with a larger bending angle when side-pulling. Therefore, the lower hardness of the first glue layer 41 facilitates the deformation and bending of the optical fiber at the first glue layer 41, while the higher hardness of the second glue layer 42 can better cover and protect the first glue layer 41 and the optical fiber.

[0036] For the first glue layer 41, glue is applied on one end of the glass tube 3 where the flared end hole 32 is located, the glue wraps the optical fiber 2 and forms a semicircular pile, and the glue is baked and cured to form the first glue layer 41. For the second glue layer 42, glue is further applied on the first glue layer 41 and the optical fiber 2, the glue wraps the first glue layer 41 and the optical fiber 2 and forms a conical pile, and the glue is baked and cured to form the second glue layer 42. The hardness of the first glue layer 41 and the second glue layer 42 is similar, and the viscosity of the glue of the two is slightly higher (>10000cps), so that it is easy to form a pile effect, and bake and cure into a corresponding shape. The glue of the first glue layer 41 can be selected to have good bonding and waterproof properties with the glass tube 3, and the glue of the second glue layer 42 can be selected to have good bonding properties with the first layer of glue.

[0037] Further, the optical fiber via hole 31 and the flared end hole 32 are filled with fixing material. By filling the optical fiber via hole 31 and the flared end hole 32 with fixing material, the optical fiber 2 can be fixed in the optical fiber via hole 31 and the flared end hole 32, providing additional mechanical support for the optical fiber 2, especially when the optical fiber 2 is bent or subjected to lateral force, reducing the mechanical stress of the optical fiber 2, reducing the displacement or damage of the optical fiber 2. At the same time, filling the optical fiber via hole 31 and the flared end hole 32 with fixing material can avoid microbending of the optical fiber 2 in the optical fiber via hole 31 and the flared end hole 32, avoid signal loss, and improve the transmission efficiency of the optical device. Specifically, the fixing material is glue. By filling the optical fiber via hole 31 and the flared end hole 32 with glue, the position of the optical fiber 2 after installation can be ensured to be accurately fixed, and the displacement of the optical fiber 2 caused by vibration or mechanical shock can be prevented, and the stability of the optical fiber 2 communication can be maintained. The use of glue can simplify the assembly process of the optical fiber 2, and the glue can be quickly cured after assembly, reducing waiting time and improving production efficiency. The choice of glue can take into account the compatibility with the optical fiber 2 and other optical device materials to ensure that good bonding performance can be maintained under different temperature and humidity conditions. At the same time, the glue can provide a certain buffering capacity to disperse the mechanical stress of the optical fiber 2 when it is bent or subjected to lateral force, reducing the risk of mechanical damage to the optical fiber 2.

[0038] Specifically, the housing 1 is provided with a tail tube 11, and the glass tube 3 is inserted into the tail tube 11. By inserting the glass tube 3 into the tail tube 11, a stable support can be provided for the glass tube 3, reducing the influence of external factors such as vibration or impact on the glass tube 3 and the internal optical fiber 2, thereby improving the structural stability of the entire optical device. The design of the tail tube 11 also makes the installation of the glass tube 3 easier and facilitates assembly during the production process. The glass tube 3 can be fixed in the tail tube 11 by glue.

[0039] The present invention also discloses a method for preparing an optical device, which is applied to the preparation of the optical device as described above, and comprises the steps of:

[0040] S100: Provide a glass tube 3, wherein the glass tube 3 has an optical fiber through hole 31 extending axially, and an expanded end hole 32 is provided at one end of the optical fiber through hole 31 away from the shell 1, and the opening size of the expanded end hole 32 expands from the inside to the outside.

[0041] S200 : Passing the glass tube 3 onto the optical fiber 2 led out from the housing 1 , and installing one end of the glass tube 3 away from the expanded end hole 32 on the housing 1 , so that the optical fiber 2 is led out from the expanded end hole 32 .

[0042] S300 : a first buffer adhesive layer 4 is provided on one end of the glass tube 3 where the expanded end hole 32 is located, and the first buffer adhesive layer 4 wraps the optical fiber 2 .

[0043] The optical device prepared by the preparation method of the present invention uses a glass tube 3 as a fixing component for the optical fiber 2 to be led out from the rear of the housing 1, wherein the use of the glass tube 3 enables the selection of a glass tube 3 of a smaller size, thereby reducing the size of the pigtail part, and at the same time, the optical fiber 2 passes through the optical fiber via 31 and the flared end hole 32 respectively, and a first buffer adhesive layer 4 is provided on the end of the glass tube 3 where the flared end hole 32 is located, and the first buffer adhesive layer 4 wraps and fixes the optical fiber 2. In this way, when the optical fiber 2 is deformed and slightly displaced by side pulling, the flared end hole 32 can guide the optical fiber 2 in the glass tube 3 to bend in an arc shape, thereby avoiding Figure 2 The right-angled edge of the glass tube 3 shown in the figure does not damage the optical fiber 2 by cutting. At the same time, the first buffer adhesive layer 4 has good bonding and buffering properties with the glass tube 3, ensuring that the optical fiber 2 is not easily separated from the glass tube 3 at the fiber outlet during damp heat testing (damp heat) and side pulling, and can guide the optical fiber 2 outside the glass tube 3 to deform in an arc during side pulling, preventing the optical fiber 2 from breaking due to short-distance large-angle deformation, thereby ensuring the side pulling performance of the optical device. Therefore, the optical device of the present invention can ensure a high side pulling protection performance of the optical fiber 2, and the size of the optical device pigtail part is small, which is conducive to miniaturization and easy to assemble.

[0044] Furthermore, before the step of providing the first buffer adhesive layer 4 , the preparation method further comprises the step of: filling the optical fiber via hole 31 and the expanded end hole 32 with a fixing material.

[0045] In this step, by filling the optical fiber via hole 31 and the flared end hole 32 with fixing material, the optical fiber 2 can be fixed in the optical fiber via hole 31 and the flared end hole 32, providing additional mechanical support for the optical fiber 2, especially when the optical fiber 2 is bent or subjected to lateral force, reducing the mechanical stress of the optical fiber 2, reducing the displacement or damage of the optical fiber 2. At the same time, filling the optical fiber via hole 31 and the flared end hole 32 with fixing material can avoid the microbending of the optical fiber 2 in the optical fiber via hole 31 and the flared end hole 32, avoid signal loss, and improve the transmission efficiency of the optical device. Specifically, the fixing material is glue. By filling the optical fiber via hole 31 and the flared end hole 32 with glue, the position of the optical fiber 2 after installation can be accurately fixed, the displacement of the optical fiber 2 caused by vibration or mechanical shock can be prevented, and the stability of the optical fiber 2 communication can be maintained. The use of glue can simplify the assembly process of the optical fiber 2, and the glue can be quickly cured after assembly, reducing waiting time and improving production efficiency. The choice of glue can take into account the compatibility with the optical fiber 2 and other optical device materials to ensure that good bonding performance can be maintained under different temperature and humidity conditions. At the same time, the glue can provide a certain buffering capacity to disperse the mechanical stress of the optical fiber 2 when it is bent or subjected to lateral force, thereby reducing the risk of mechanical damage to the optical fiber 2.

[0046] Step S300 specifically includes the steps of: coating a first glue layer 41 in a semicircular and semi-elliptical shape on one end of the glass tube 3 where the expanded end hole 32 is located, and baking and curing the first glue layer 41; arranging a second glue layer 42 in a conical shape on the first glue layer 41, and baking and curing the second glue layer 42.

[0047] The present invention also discloses a miniature pump, comprising the above optical device, or comprising the optical device prepared by the above preparation method. The optical device in the present invention is applied to the miniature pump, and can meet the miniaturization requirements of the miniature pump while ensuring the side-pull performance of the optical fiber 2 of the optical device, and the pigtail structure is small in size and easy to assemble.

[0048] Micropumps may be used in a variety of applications in optical systems, such as as a component of optical pumping in lasers to excite the medium to produce laser light. In some portable or energy-saving optical devices, micropumps are highly favored due to their small size and low power consumption.

[0049] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. For those skilled in the art, the technical solutions described in the above embodiments can be modified, or some of the technical features therein can be replaced by equivalents; and all these modifications and replacements should fall within the scope of protection of the claims attached to the present invention.

Claims

1. An optical device, characterized in that: The invention comprises a shell, an optical fiber and a glass tube; one end of the glass tube is installed on the shell, the glass tube has an optical fiber through hole extending in the axial direction, the end of the optical fiber through hole away from the shell is provided with an expanded end hole, the opening size of the expanded end hole expands from the inside to the outside; the optical fiber passes through the shell and into the optical fiber through hole, and is led out from the expanded end hole; a first buffer adhesive layer is provided on the end of the glass tube where the expanded end hole is located, and the first buffer adhesive layer wraps the optical fiber.

2. The optical device according to claim 1, characterized in that: The first buffer adhesive layer includes a first glue layer, and the first glue layer is adhered to the end of the glass tube where the expanded end hole is located; the first glue layer is semicircular and semi-elliptical.

3. The optical device according to claim 2, characterized in that: The first buffer layer includes a second glue layer, and the second glue layer adheres to and covers the first glue layer; the second glue layer is in a cone shape.

4. The optical device according to claim 3, characterized in that: The hardness of the first glue layer is 60-70D.

5. The optical device according to claim 4, characterized in that: The hardness of the second glue layer is greater than the hardness of the first glue layer.

6. The optical device according to any one of claims 1 to 5, characterized in that: The optical fiber through hole and the expanded end hole are filled with fixing material.

7. The optical device according to any one of claims 1 to 5, characterized in that: The shell is provided with a tail pipe, and the glass tube is inserted into the tail pipe.

8. A method for preparing an optical device, applied to the preparation of the optical device according to any one of claims 1 to 7, characterized in that: Includes steps: A glass tube is provided, wherein the glass tube has an optical fiber through hole extending in the axial direction, and an expanded end hole is provided at one end of the optical fiber through hole away from the housing, and the opening size of the expanded end hole expands from the inside to the outside; Passing the glass tube onto the optical fiber led out from the housing, and installing the end of the glass tube away from the expanded end hole on the housing, and the optical fiber is led out from the expanded end hole; A first buffer adhesive layer is arranged on one end of the glass tube where the expanded end hole is located, and the first buffer adhesive layer wraps the optical fiber.

9. The preparation method according to claim 8, characterized in that: Before the step of providing the first buffer adhesive layer, the preparation method further comprises the steps of: The fiber-through holes and the expanded end holes are filled with fixing material.

10. A micro pump, characterized in that: An optical device comprising any one of claims 1 to 7, or an optical device prepared by the preparation method according to claim 8 or 9.

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