Optical fiber patch cord structure with optical axis correction function

Abstract

The utility model provides an optical fiber patch cord structure with an optical axis correction function. The optical fiber patch cord structure comprises a correction structural member and an optical fiber ferrule. The optical fiber insertion core comprises an insertion core body and an optical fiber coaxially packaged in the center of the insertion core body, and a first included angle is formed between the end face of the optical fiber and a plane perpendicular to the center axis of the optical fiber insertion core. The correction structural member is provided with a first end and a second end, the first end is provided with an insertion hole, and the second end is provided with a fixing hole; the insertion hole is communicated with the fixing hole and is coaxially arranged along the first central axis; a second included angle is formed between the center axis of the correction structural member and the first center axis, and the front end of the optical fiber insertion core is inserted from the insertion hole to enable the end face of the optical fiber to penetrate through the fixing hole to be fixed, so that the center axis of the optical fiber coincides with the first center axis, that is, the second included angle is formed between the center axis of the correction structural member and the center axis of the correction structural member; therefore, the optical axis of the output light of the optical fiber is parallel to the central axis of the correction structural member.

Description

Technical Field

[0001] This utility model relates to the field of optical fiber technology, and in particular to an optical fiber patch cord structure with optical axis correction function. Background Technology

[0002] In fiber optic transmission systems, to reduce return loss, fiber optic patch cords often employ an APC (Angled Physical Contact) polishing process on their end faces, tilting them at a certain angle (typically 8°). Due to this tilted design, when the optical signal exits the fiber, the optical axis of the output light will deflect from the central axis of the fiber in the ceramic ferrule by an angle (caused by the end face tilt angle, typically 3.6°).

[0003] In fields such as lidar and high-precision fiber optic sensing, this optical axis misalignment can lead to the following problems:

[0004] Decreased optical signal coupling efficiency affects system sensitivity;

[0005] When debugging multi-channel optical paths, the difficulty of aligning the optical axis increases, which leads to a longer debugging time.

[0006] In high-power scenarios, a deviated optical axis may cause localized energy concentration, damaging receiver devices.

[0007] In the current technology, there is no effective solution to the optical axis misalignment problem of APC end face jumpers, and conventional jumpers cannot meet the requirements of optical axis coaxiality in high-precision fields.

[0008] Therefore, it is necessary to provide a fiber optic patch cord structure with optical axis correction function to effectively or partially solve the above problems. Utility Model Content

[0009] This invention provides a fiber optic patch cord structure with optical axis correction function, which solves the problem that the output optical axis of the existing APC end-face fiber optic patch cord does not coincide with the central axis of the fiber.

[0010] This utility model embodiment provides an optical fiber patch cord structure with optical axis correction function, including a correction structure and an optical fiber ferrule; the optical fiber ferrule includes a ferrule body and an optical fiber coaxially encapsulated in the center of the ferrule body, the end face of the optical fiber forming a first angle with a plane perpendicular to the central axis of the optical fiber ferrule; the correction structure has a first end and a second end, the first end is provided with an insertion hole, and the second end is provided with a fixing hole; the insertion hole and the fixing hole are connected and coaxially arranged along the first central axis; the central axis of the correction structure has a second angle with the first central axis, the front end of the optical fiber ferrule is inserted from the insertion hole so that the end face of the optical fiber passes through the fixing hole and is fixed, so that the central axis of the optical fiber coincides with the first central axis, that is, has a second angle with the central axis of the correction structure, thereby making the output optical axis of the optical fiber parallel to the central axis of the correction structure.

[0011] Preferably, the first included angle is 8° and the second included angle is 3.6°.

[0012] Preferably, the insertion hole is a circular hole, the inner diameter of the insertion hole is slightly larger than the maximum outer diameter of the optical fiber ferrule, and the optical fiber ferrule is clearance-fitted with the insertion hole.

[0013] Preferably, the outer diameter of the front end of the optical fiber ferrule matches the inner diameter of the fixing hole, and the front end of the optical fiber ferrule is inserted into the fixing hole for fixation.

[0014] Preferably, the gap between the insertion hole and the optical fiber ferrule is filled with adhesive, which fixes the optical fiber ferrule.

[0015] Preferably, the adhesive is a UV-curable adhesive or an epoxy resin.

[0016] Preferably, a positioning key is provided in the insertion hole, and a positioning groove is provided on the outer wall of the optical fiber ferrule along the axial direction corresponding to the positioning key. When the optical fiber ferrule is inserted into the insertion hole, the positioning key and the positioning groove are matched to limit the insertion orientation of the optical fiber ferrule and prevent the optical fiber ferrule from rotating.

[0017] Preferably, the correction structure is cylindrical or cuboid in shape, and the outer wall of the first end of the correction structure extends outward to form a flange.

[0018] Preferably, the ferrule body is made of ceramic.

[0019] Compared with the prior art, the technical solution of this utility model embodiment has the following beneficial effects:

[0020] This utility model provides a fiber optic patch cord structure with optical axis correction function. Through the bias hole design of the correction structure, the inserted fiber optic ferrule is deflected by a set angle, which accurately compensates for the offset of the output light optical axis caused by the tilt angle of the fiber end face, so that the output light optical axis is parallel to the central axis of the correction structure, thereby realizing the correction of the output light optical axis.

[0021] Furthermore, the combination design of the fiber optic ferrule and the insertion hole clearance fit, the matching setting of the positioning key and the positioning groove, and the glue fixation ensures that the angle deviation does not exceed 0.1° during long-term use.

[0022] Furthermore, the component processing technology is simple, and key angles and dimensions can be achieved through machining alone, resulting in low production costs and suitability for mass production. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model, not all embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 A cross-sectional view of an optical fiber patch cord structure with optical axis correction function provided for an embodiment of this utility model;

[0025] Figure 2 A side view of an optical fiber patch cord structure with optical axis correction function provided for an embodiment of this utility model.

[0026] In the picture:

[0027] 1-Correction structure; 11-First end; 12-Second end; 13-Insert hole; 14-Fixing hole; 15-First central shaft; 16-Positioning key; 17-Flange; 2-Fiber optic ferrule; 21-Ferrule body; 22-Fiber optic cable; 23-Output optical axis; 3-Glue. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0029] The technical solution of this utility model will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0030] Based on the problems existing in the prior art, this utility model embodiment provides an optical fiber patch cord structure with optical axis correction function.

[0031] Figure 1 A cross-sectional view of an optical fiber patch cord structure with optical axis correction function provided for an embodiment of this utility model; Figure 2 A side view of an optical fiber patch cord structure with optical axis correction function provided for an embodiment of this utility model.

[0032] Now see Figure 1 and Figure 2 This utility model provides a fiber optic patch cord structure with optical axis correction function, including a correction structure 1 and a fiber optic ferrule 2. The fiber optic ferrule 2 includes a ferrule body 21 and an optical fiber 22 coaxially encapsulated in the center of the ferrule body 21. The end face of the optical fiber 22 forms a first angle α with the plane perpendicular to the central axis of the fiber optic ferrule 2. The correction structure 1 has a first end 11 and a second end 12. The first end 11 is provided with an insertion hole 13, and the second end 12 is provided with a fixing hole 14. The insertion hole 13 and the fixing hole 14 are connected and coaxially arranged along the first central axis 15. The central axis of the correction structure 1 has a second angle β with the first central axis 15. The front end of the fiber optic ferrule 2 is inserted into the end face of the optical fiber 22 through the insertion hole 13 and fixed through the fixing hole 14, so that the central axis of the optical fiber 22 coincides with the first central axis 15, that is, it has a second angle β with the central axis of the correction structure 1, thereby making the output optical axis 23 of the optical fiber 22 parallel to the central axis of the correction structure 1.

[0033] In some embodiments, the first included angle α is 8° and the second included angle β is 3.6°; the first central axis 15 forms a 3.6° angle with the central axis of the correction structure 1, which is used to compensate for the optical axis offset caused by the 8° tilt angle of the fiber end face.

[0034] In some embodiments, the insertion hole 13 is a circular hole, and the inner diameter of the insertion hole 13 is slightly larger than the maximum outer diameter of the fiber optic ferrule 2. The fiber optic ferrule 2 and the insertion hole 13 are fitted with a clearance.

[0035] Specifically, the outer diameter of the ferrule body 21 is a standard size, and the inner diameter of the insertion hole 13 is 0.04mm larger than the maximum outer diameter of the ferrule body 21. The two are fitted together with a clearance to ensure a tight fit without loosening.

[0036] In some embodiments, the gap between the insertion hole 13 and the fiber optic ferrule 2 is filled with adhesive 3, which fixes the fiber optic ferrule 2. After the adhesive 3 cures, the fiber optic ferrule 2 is rigidly fixed in the insertion hole 13, ensuring the stability of the second included angle, which satisfies 3.6°±0.1°.

[0037] In some embodiments, adhesive 3 is a UV-curable adhesive or epoxy resin.

[0038] In some embodiments, the outer diameter of the front end of the fiber optic ferrule 2 matches the inner diameter of the fixing hole 14, and the front end of the fiber optic ferrule 2 is inserted into the fixing hole 14 for stable fixation.

[0039] In some embodiments, a positioning key 16 is provided in the insertion hole 13, and a positioning groove is provided on the outer wall of the fiber optic ferrule 2 along the axial direction corresponding to the positioning key 16. When the fiber optic ferrule 2 is inserted into the insertion hole 13, the positioning key 16 is matched with the positioning groove to limit the insertion orientation of the fiber optic ferrule 2 and prevent the fiber optic ferrule 2 from rotating.

[0040] In some embodiments, the correction structure 1 is generally cylindrical or cuboid, and the outer wall of the first end 11 of the correction structure 1 extends outward to form a flange 17.

[0041] In some embodiments, the ferrule body 21 is made of ceramic.

[0042] In summary, the fiber optic patch cord structure with optical axis correction function provided by this utility model embodiment, through the bias hole design of the setting angle of the correction structure 1, causes the inserted fiber optic ferrule 2 to deflect by a setting angle, accurately compensating for the offset of the output optical axis 23 caused by the tilt angle of the end face of the fiber optic 22, so that the output optical axis 23 is parallel to the central axis of the correction structure 1, thereby realizing the correction of the output optical axis 23.

[0043] Furthermore, the combination design of the fiber optic ferrule 2 and the insertion hole 13 with clearance fit, the matching setting of the positioning key 16 and the positioning groove, and the fixing with glue 3 ensures that the angle deviation does not exceed 0.1° during long-term use.

[0044] Furthermore, the component processing technology is simple, and key angles and dimensions can be achieved through machining alone, resulting in low production costs and suitability for mass production.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A fiber optic patch cord structure with optical axis correction function, characterized in that, The system includes a correction structure and an optical fiber ferrule. The optical fiber ferrule includes a ferrule body and an optical fiber coaxially encapsulated at the center of the ferrule body. The end face of the optical fiber forms a first angle with a plane perpendicular to the central axis of the optical fiber ferrule. The correction structure has a first end and a second end. The first end is provided with an insertion hole, and the second end is provided with a fixing hole. The insertion hole and the fixing hole are connected and coaxially arranged along the first central axis. The central axis of the correction structure has a second angle with the first central axis. The front end of the optical fiber ferrule is inserted through the insertion hole so that the end face of the optical fiber passes through the fixing hole and is fixed, so that the central axis of the optical fiber coincides with the first central axis, that is, it has a second angle with the central axis of the correction structure, thereby making the output optical axis of the optical fiber parallel to the central axis of the correction structure.

2. The fiber optic patch cord structure with optical axis correction function according to claim 1, characterized in that, The first included angle is 8°, and the second included angle is 3.6°.

3. The fiber optic patch cord structure with optical axis correction function according to claim 1, characterized in that, The insertion hole is a circular hole, and the inner diameter of the insertion hole is slightly larger than the maximum outer diameter of the optical fiber ferrule. The optical fiber ferrule is clearance-fitted with the insertion hole.

4. The fiber optic patch cord structure with optical axis correction function according to claim 1, characterized in that, The outer diameter of the front end of the optical fiber ferrule matches the inner diameter of the fixing hole, and the front end of the optical fiber ferrule is inserted into the fixing hole for fixation.

5. The fiber optic patch cord structure with optical axis correction function according to claim 3, characterized in that, The gap between the insertion hole and the optical fiber ferrule is filled with glue, which fixes the optical fiber ferrule in place.

6. The fiber optic patch cord structure with optical axis correction function according to claim 5, characterized in that, The adhesive is a UV-curable adhesive or epoxy resin.

7. The fiber optic patch cord structure with optical axis correction function according to claim 1, characterized in that, The insertion hole is provided with a positioning key, and the outer wall of the optical fiber ferrule is provided with a positioning groove along the axial direction corresponding to the positioning key. When the optical fiber ferrule is inserted into the insertion hole, the positioning key and the positioning groove are matched to limit the insertion orientation of the optical fiber ferrule and prevent the optical fiber ferrule from rotating.

8. The fiber optic patch cord structure with optical axis correction function according to claim 1, characterized in that, The correction structure is cylindrical or cuboid in shape, and the outer wall of the first end of the correction structure extends outward to form a flange.

9. The fiber optic patch cord structure with optical axis correction function according to claim 1, characterized in that, The insert body is made of ceramic.

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