A fiber optic stress application device

Abstract

This utility model relates to the field of semiconductor technology, specifically to an optical fiber stress application device. The fine-tuning mechanism includes a base with a groove and a top cover with a protrusion. The groove accommodates the optical fiber. When the top cover is fastened to the base, the protrusion is embedded in the groove. Through the connection and cooperation between the fixing buckle on the top cover and the fixing hole on the base, the top cover and base are pressed together, causing the protrusion to move towards the bottom of the groove, thus applying stress in the radial direction of the optical fiber. The cross-section of the protrusion is an isosceles trapezoid, and the width of the shorter side of the isosceles trapezoid does not exceed the diameter of the optical fiber. The cross-section of the groove includes a connected isosceles trapezoidal portion and a rectangular portion, the width of which is not less than the diameter of the optical fiber. Stress is generated by the mechanical cooperation between the base and the top cover, which, combined with the locking structure of the fixing buckle, applies a uniform and continuous squeezing action to the optical fiber placed in the groove, thereby applying stable and uniform stress.

Description

Technical Field

[0001] This utility model relates to the field of semiconductor technology, specifically to an optical fiber stress application device. Background Technology

[0002] The statements in this section merely provide background information related to this utility model and do not necessarily constitute prior art.

[0003] In the process of optical fiber performance testing, stress needs to be applied to the optical fiber in advance to simulate the stress situation of the optical fiber in actual use, so as to test the performance of the optical fiber under stress.

[0004] There are two main types of existing fiber optic stress generation devices: the adhesive method and the pulling method. The adhesive method requires using adhesive to fix the fiber to the measurement position, and then applying stress using external equipment. During operation, the amount of adhesive applied needs to be controlled; if the adhesive is not applied evenly, the stress on the fiber surface will also be uneven. The pulling method uses a mechanical device to directly pull the fiber, thereby generating axial stress. However, during pulling, the fiber needs to be pre-fixed by the mechanical device while bearing radial stress before subsequent pulling. Given the thin shape of the fiber, the pulling method makes it difficult to ensure a uniform stress distribution in the fiber test section. Utility Model Content

[0005] This invention provides an optical fiber stress application device. By simplifying the operation process and ensuring the stability and controllability of stress application, the device can simulate real stress conditions during the test process, while avoiding physical or chemical damage to the optical fiber, thereby ensuring the accuracy of the test results and the subsequent usability of the optical fiber.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: This utility model provides an optical fiber stress application device, including a base with a groove and a top cover with a protrusion. The groove is used to accommodate the optical fiber. When the top cover is fastened to the base, the protrusion is embedded in the groove. Through the connection and cooperation between the fixing buckle on the top cover and the fixing hole on the base, the pressure between the top cover and the base is realized, so that the protrusion moves towards the bottom of the groove, thereby realizing the application of stress in the radial direction of the optical fiber. The cross-section of the protrusion is an isosceles trapezoid, and the width of the shorter side of the isosceles trapezoid does not exceed the diameter of the optical fiber; the cross-section of the trench includes an isosceles trapezoidal portion and a rectangular portion connected together, and the width of the rectangular portion is not less than the diameter of the optical fiber.

[0007] Furthermore, in the cross-section of the trench, the shorter side of the isosceles trapezoidal portion is connected to the rectangular portion, and the longer side of the isosceles trapezoidal portion is located on the surface of the base. The isosceles trapezoidal portion is used to mate with the protrusion, and the rectangular portion is used to accommodate the optical fiber.

[0008] Furthermore, in the cross-section of the groove, the longer side of the isosceles trapezoidal portion forms an opening on the surface of the base.

[0009] Furthermore, in the cross-section of the trench, the width of the longer side of the isosceles trapezoid is B; in the cross-section of the convex section, the width of the longer side of the isosceles trapezoid is A; A <B。

[0010] Furthermore, in the cross-section of the trench, the total height of the isosceles trapezoidal and rectangular portions is H; in the cross-section of the protrusion, the height of the isosceles trapezoid is h; h <H。

[0011] Furthermore, in the cross-section of the groove, the angle formed between the isosceles trapezoidal portion and the base reference plane is X; in the cross-section of the protrusion, the angle formed between the isosceles trapezoid and the top cover reference plane is Y; X and Y are different.

[0012] Furthermore, both the base reference plane and the top cover reference plane are horizontal.

[0013] Furthermore, the retaining clips pass through the top cover and connect to the retaining holes on the base. Furthermore, the end of the fixing buckle is screwed into the fixing hole, causing the top cover to gradually press against the base, increasing the depth of the protrusion embedded in the groove.

[0014] Furthermore, the top cover and the base are connected by hinges.

[0015] Compared with existing technologies, one or more of the above technical solutions have the following beneficial effects: 1. By cooperating with the protrusion on the upper cover and the groove on the base, the locking force of the buckle is transformed into a uniform and stable radial compression of the optical fiber. The strip-shaped stress application surface at the end of the protrusion and the rectangular part of the groove together form a multi-directional constraint structure, which fixes the stress area of ​​the optical fiber and ensures uniform stress distribution. This effectively avoids the problem of excessive stretching or breakage caused by stress concentration in the traditional pulling method, and greatly improves the reliability and repeatability of the test data.

[0016] 2. The shorter side of the isosceles trapezoidal cross-section of the protrusion does not exceed the diameter of the optical fiber, while the width of the rectangular portion of the groove cross-section is not less than the diameter of the optical fiber. This width relationship allows the mating surfaces of the groove and the protrusion to be designed as isosceles trapezoidal cross-sections with an angle difference. This design creates a controllable gap between the inclined surfaces (i.e., the "sleeves" of the isosceles trapezoid), fundamentally eliminating the risk of "locking up" due to excessive embedding and friction, which makes it difficult to separate the top cover from the base. This structure ensures that the device can be easily and quickly reset after testing, facilitating the placement and removal of the optical fiber, while avoiding additional lifespan loss caused by the optical fiber being under stress for a long time.

[0017] 3. The device is constructed as a regular rectangular block, a structure that makes it easily and stably clamped by standard external fixtures or mechanical devices, thus readily compatible with subsequent axial stress testing. A single device can meet the fixation requirements for both radial and axial stress testing modes, expanding its application scenarios and reducing testing complexity and cost. Attached Figure Description

[0018] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0019] Figure 1 This is a schematic diagram of the structure of the optical fiber stress application device provided in one or more embodiments of this utility model; Figure 2 This is a partial cross-sectional schematic diagram of the optical fiber stress application device provided in one or more embodiments of this utility model.

[0020] Figure 1 In the middle: 1. Fixing buckle, 2. Top cover plate, 3. Groove, 4. Fiber optic cable, 5. Base, 6. Protrusion, 7. Fixing hole; Figure 2 In the middle: 201 bottom surface, 202 inclined surface, 203 optical fiber under stress. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0023] As described in the background section, there are two main types of existing fiber optic stress generation devices, and the drawbacks of both methods are as follows: The adhesive method is cumbersome to operate, and it is difficult to accurately control the amount and location of the adhesive. The curing process is time-consuming, and after the stress is applied, it is difficult to clean the adhesive, which can easily contaminate the optical fiber and affect subsequent optical fiber testing. The adhesive may even react chemically with the optical fiber, damaging its performance and causing deviations in the test results.

[0024] Pulling on optical fibers can easily cause excessive stretching, leading to fiber breakage. It is impossible to achieve the requirement of precise stress control in optical fibers, and it is difficult to ensure the uniformity of stress application during the stress application process. Its stability and controllability are poor.

[0025] Therefore, the following embodiment provides an optical fiber stress application device. Stress is generated by the mechanical interaction between the base and the upper cover plate, compressing the optical fiber. Combined with a locking mechanism, this creates a uniform and continuous compressive force on the optical fiber placed in a trench, applying stable and uniform stress. The upper cover plate features a rectangular protrusion to ensure a stable stress-bearing area and prevent localized stress concentration. The overall structure is simple, requiring no external adhesives or pulling during operation, achieving non-destructive, efficient, and controllable stress application, significantly improving the reliability and repeatability of the test.

[0026] This solution proposes an optical fiber stress application device, such as... Figure 1 and Figure 2 As shown, the device includes an upper cover plate 2 and a base 5 connected by a hinge. The surface of the base 5 is provided with a groove 3 for accommodating an optical fiber 4. The upper cover plate 2 is provided with a protrusion 6 corresponding to the position of the groove 3. The upper cover plate 2 is provided with a fixing buckle 1, which is connected to a fixing hole 7 on the side of the groove 3.

[0027] The optical fiber 4 is placed in the groove 3 beforehand. After the upper cover plate 2 and the base 5 are fastened together, the protrusion 6 is embedded in the groove 3. As the fixing buckle 1 is gradually screwed into the fixing hole 7, the upper cover plate 2 gradually presses against the base 5, and the protrusion 6 moves toward the bottom of the groove 3, thereby gradually squeezing the optical fiber 4 and applying stress in the radial direction of the optical fiber 4.

[0028] When axial stress needs to be applied, the entire device can be fixed by external clamps or mechanical devices and then the axial force can be applied. Since the entire device is approximately rectangular in shape, it is easier to be fixed by external clamps or mechanical devices to facilitate the application of axial stress.

[0029] With the cooperation of the fixing buckle 1 and the fixing hole 7, the upper cover plate 2 gradually presses against the base 5. During this process, the protrusion 6 is embedded in the groove 3. As the embedding depth increases, the groove 3 deforms, causing the friction between the two sides of the groove 3 and the protrusion 6 that are in contact to gradually increase. When the friction is too great, the upper cover plate 2 is difficult to separate from the base 5, making it impossible to remove the optical fiber 4. The squeezed optical fiber 4 is in a state of continuous stress, resulting in unnecessary losses. To address the above problem, this solution adjusts the tilt angle of the two sides of the groove 3 and the protrusion 6 that are in contact, creating a certain gap between them to ensure that the upper cover plate 2 and the base 5 can reliably separate and reset.

[0030] like Figure 2 As shown, the cross-section of the groove 3 includes an isosceles trapezoidal portion and a rectangular portion connected together. The upper base (shorter side) of the isosceles trapezoidal portion is connected to the rectangular portion, and the lower base (longer side) of the isosceles trapezoidal portion is located on the surface of the base 5 and forms an opening on the surface of the base 5. The isosceles trapezoidal portion is used to mate with the protrusion 6, and the rectangular portion is used to accommodate the optical fiber 4.

[0031] The cross-section of protrusion 6 is also an isosceles trapezoid, with the upper base (the shorter side) abutting against the stressed optical fiber 203, and the lower base (the longer side), i.e. Figure 2 The bottom surface 201 is connected to the top cover plate 2.

[0032] The width of the upper bottom (shorter side) of the protrusion 6 section does not exceed the diameter of the optical fiber 4, forming a strip-shaped (or rectangular) stress application surface with a length direction much larger than the width direction. Under the action of the fixing buckle 1 being screwed into the fixing hole 7, the application surface approaches and squeezes the optical fiber 4 in the vertical direction, so that the optical fiber 4 is squeezed into the rectangular part of the groove 3. By using the three walls of the rectangular part and the upper bottom (shorter side) of the protrusion 6 section to apply stress to the optical fiber 4 in four directions, a stable and uniform squeezing effect on the optical fiber 4 can be formed, avoiding the problem of excessive stretching or breakage of the optical fiber when the stress is uneven.

[0033] Meanwhile, in the cross-section of trench 3, the width of the rectangular portion is not less than the diameter of optical fiber 4. Utilizing the difference between the width of the rectangular portion of trench 3 and the width of the upper base (shorter side) of protrusion 6, an angle difference is created between the "waist" of the trapezoidal portion of trench 3 and the "waist" of protrusion 6. This indirectly creates a certain gap between the "waist" areas where protrusion 6 and trench 3 were originally in complete contact, ensuring that the friction between protrusion 6 and trench 3 does not increase excessively during stress application, allowing the upper cover plate 2 and base 5 to reliably separate and reset.

[0034] Specifically, the isosceles trapezoidal portion of the groove 3 has a sloping surface 202, and the protrusion 6 also has a sloping surface. Since the isosceles trapezoids of the groove 3 and the protrusion 6 have different "upper base widths", the angle between the "legs" of the isosceles trapezoids is different, which indirectly creates a gap between the sloping surfaces formed by the "legs". This prevents the protrusion 6 from being difficult to reset due to friction when it is embedded too deeply in the groove 3. As a result, the fiber 4 can quickly remove the applied stress after the test is completed, avoiding additional life loss of the fiber 4.

[0035] Specific implementation examples: In use, first place the optical fiber 4, to which stress needs to be applied, into the groove 3 of the base 5. Then, connect the upper cover plate 2 to the base 5. Next, rotate the fixing buckle 1 to engage it in the mating hole 7 of the base 5, thereby fixing the upper cover plate 2 to the base 5. During the fixing process, the upper cover plate 2 exerts a squeezing effect on the optical fiber 4 placed in the groove 3, thus achieving the purpose of applying stress to the optical fiber 4. The entire process does not require the use of adhesive or pulling of the optical fiber 4, making it simple to operate and able to stably apply stress to the optical fiber 4.

[0036] Stress is defined as the response of a material per unit area to an external force, expressed by the following formula: ; It represents the stress value; F is the applied force, in N; A is the area of ​​the force application, in cm². 2 Therefore, ensuring a stable stress area and applied stress value guarantees the generation of a fixed stress value. The device in this design applies stress through a snap-fit ​​mechanism, ensuring the smoothness and stability of stress application, and the rectangular structure of the protrusion 6 ensures the stability of the stress area.

[0037] The engagement between the protrusion on the top cover and the groove on the base transforms the locking force of the buckle into a uniform and stable radial compression of the optical fiber. The strip-shaped stress application surface at the end of the protrusion and the rectangular portion of the groove together form a multi-directional constraint structure, ensuring a fixed stress area and uniform stress distribution on the optical fiber. This effectively avoids the excessive stretching or breakage problems caused by stress concentration in traditional pulling methods, greatly improving the reliability and repeatability of test data.

[0038] The shorter side of the isosceles trapezoidal cross-section of the protrusion does not exceed the diameter of the optical fiber, while the width of the rectangular portion of the groove cross-section is not less than the diameter of the optical fiber. This width relationship allows the mating surfaces of the groove and the protrusion to be designed as isosceles trapezoidal cross-sections with an angle difference. This design creates a controllable gap between the inclined surfaces (i.e., the "sleeves" of the isosceles trapezoid), fundamentally eliminating the risk of "locking up" due to excessive embedding and friction, which can make it difficult to separate the top cover from the base. This structure ensures that the device can be easily and quickly reset after testing, facilitating the placement and removal of the optical fiber, while avoiding additional lifespan loss caused by prolonged stress on the optical fiber.

[0039] The device is constructed as a regular rectangular block, a structure that makes it easy to be stably clamped by standard external fixtures or mechanical devices, thus easily compatible with subsequent axial stress testing. A single device can meet the fixation requirements for both radial and axial stress testing modes, expanding its application scenarios and reducing testing complexity and cost.

[0040] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A fiber optic stress application device, characterized in that, It includes a base with grooves and a top cover with protrusions. The grooves are used to accommodate optical fibers. When the top cover is fastened to the base, the protrusions are embedded in the grooves. The connection and cooperation between the fixing buckles on the top cover and the fixing holes on the base achieves the pressing between the top cover and the base, causing the protrusions to move towards the bottom of the grooves and apply stress in the radial direction of the optical fiber. The protrusion has an isosceles trapezoidal cross-section, and the width of the shorter side of the isosceles trapezoid does not exceed the diameter of the optical fiber; the groove has a cross-section consisting of an isosceles trapezoidal portion and a rectangular portion connected together, and the width of the rectangular portion is not less than the diameter of the optical fiber.

2. The fiber optic stress application device as described in claim 1, characterized in that, In the cross-section of the groove, the shorter side of the isosceles trapezoidal portion is connected to the rectangular portion, and the longer side of the isosceles trapezoidal portion is located on the surface of the base. The isosceles trapezoidal portion is used to mate with the protrusion, and the rectangular portion is used to accommodate the optical fiber.

3. The fiber optic stress application device as described in claim 1, characterized in that, In the cross-section of the groove, the longer side of the isosceles trapezoidal portion forms an opening on the surface of the base.

4. The fiber optic stress application device as described in claim 1, characterized in that, In the cross-section of the groove, the width of the longer side of the isosceles trapezoid is B; in the cross-section of the protrusion, the width of the longer side of the isosceles trapezoid is A; A <B。 5. The fiber optic stress application device as described in claim 1, characterized in that, In the cross-section of the trench, the total height of the isosceles trapezoidal and rectangular portions is H; in the cross-section of the protrusion, the height of the isosceles trapezoid is h; h <H。 6. The fiber optic stress application device as described in claim 1, characterized in that, In the cross-section of the groove, the angle formed between the isosceles trapezoidal portion and the base reference plane is X; in the cross-section of the protrusion, the angle formed between the isosceles trapezoid and the top cover reference plane is Y; X and Y are different.

7. The fiber optic stress application device as described in claim 6, characterized in that, Both the base reference plane and the top cover reference plane are horizontal.

8. The fiber optic stress application device as described in claim 1, characterized in that, The fixing buckle passes through the top cover and connects to the fixing hole on the base.

9. The fiber optic stress application device as described in claim 8, characterized in that, The end of the fixing buckle is screwed into the fixing hole, which causes the upper cover to gradually press the base, increasing the depth of the protrusion embedded in the groove.

10. The fiber optic stress application device as described in claim 1, characterized in that, The upper cover plate and the base are connected by a hinge.

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