High-sensitivity photoelectric detection module

Abstract

The invention provides a high-sensitivity photoelectric detection module, and the module comprises a butt joint part which is used for fixing a ceramic ferrule which is inserted into the butt joint part and can emit an optical signal. The detection part and the butt joint part are coaxially arranged, and a photoelectric detector is arranged in the detection part and used for receiving an optical signal sent by a ceramic ferrule; the outer sleeve sleeves the outer sides of the butt joint part and the detection part, one side of the outer sleeve is rotatably connected with the butt joint part, the other side of the outer sleeve is in threaded connection with the detection part, and the distance between the ceramic ferrule and the photoelectric detector is adjusted through relative rotation between the outer sleeve and the flange fixing seat. Therefore, each photoelectric detector can exert the optimal detection performance, the detection sensitivity is improved, and the yield of products is improved.

Description

Technical Field

[0001] The invention relates to the technical field of photoelectric detection, and in particular to a high-sensitivity photoelectric detection module. Background Art

[0002] The high-sensitivity photoelectric detection module is one of the core components in the high-performance optical power test system. Its structure includes ceramic sleeves, FC connectors, photoelectric detectors and other parts. When the external fiber optic connector is connected to the high-sensitivity photoelectric detection module, the ceramic ferrule in the fiber optic connector will enter the ceramic sleeve in the high-sensitivity photoelectric detection module and be fixed in the ceramic sleeve by the relevant structure of the photoelectric detection module. The light emitted from the ceramic ferrule in the fiber optic connector will pass through the ceramic sleeve in the photoelectric detection module and then irradiate the photoelectric detector. The photoelectric detector converts the received optical signal into an electrical signal. After further analyzing the electrical signal, relevant information about the light emitted from the optical fiber can be obtained.

[0003] At present, the structure of high-sensitivity photoelectric detection modules has the following problems:

[0004] First, in the existing structure, the distance between the ceramic sleeve and the photodetector in the high-sensitivity photodetection module is fixed and cannot be adjusted, and the ceramic ferrule in the optical fiber connector is fixed in the ceramic sleeve by the relevant structure of the high-sensitivity photodetection module during testing. This results in the distance between the ceramic ferrule in the optical fiber connector and the photodetector in the high-sensitivity photodetection module being non-adjustable, and each photodetector cannot exert its optimal detection performance, which results in low sensitivity and poor consistency of the photodetection module, and low product yield.

[0005] Secondly, in the existing structure, there is a clearance fit between the ceramic sleeve and the FC connector, and the ceramic sleeve can swing freely in the FC connector. This results in that after the light passes through the ceramic sleeve, the position of the photodetector is inconsistent each time, which will cause a large test error during high-sensitivity power testing and poor repeatability of indicators.

[0006] In addition, dark current in the environment will also affect the test performance of the high-sensitivity photoelectric detection module and reduce the reliability of the test results.

[0007] Finally, when the external fiber optic connector is working, the ceramic ferrule on the fiber optic connector will pass through the ceramic sleeve and frequently collide with the bottom of the FC connector. Since the ceramic ferrule is harder than the FC connector made of stainless steel or other metals, the FC connector will drop metal particles. In addition, when the photodetector is installed in a high-sensitivity photodetection module, it is often rotated, which will also generate particles around the photodetector. The particles will block the light path, resulting in a decrease in test accuracy, a reduction in service life, and an increase in maintenance costs.

[0008] In summary, high-sensitivity detection photoelectric detection modules have the problems of low yield, poor repeatability of test results, and decreased test accuracy over time, and the dark current in the environment will also reduce the reliability of the test results. Summary of the invention

[0009] In order to solve the problems existing in the prior art, the present invention provides a high-sensitivity photoelectric detection module, comprising a docking portion, for fixing a ceramic ferrule that can emit a light signal and is inserted into the docking portion;

[0010] A detection part, the detection part is coaxially arranged with the docking part, and a photoelectric detector is arranged in the detection part for receiving the optical signal emitted by the ceramic ferrule;

[0011] An outer sleeve is sleeved on the outside of the docking part and the detection part, one side of the outer sleeve is rotationally connected to the docking part, and the other side of the outer sleeve is threadedly connected to the detection part. The distance between the ceramic ferrule and the photoelectric detector is adjusted by relative rotation between the outer sleeve and the flange fixing seat.

[0012] Specifically, a flange connecting seat is provided in the docking part, a flange fixing seat is provided in the detection part, a first guide groove is provided on one side of the inner wall of the outer sleeve, a second guide groove matching the first guide groove is provided on the outer wall of the flange connecting seat, a retaining spring is clamped between the first guide groove and the second guide groove, an internal thread is provided on the other side of the inner wall of the outer sleeve, an external thread matching the internal thread is provided in the flange fixing seat, and the flange fixing seat is threadedly connected to the outer sleeve.

[0013] Specifically, a spring groove is provided on one side of the flange fixing seat close to the flange connecting seat, a built-in spring is provided in the spring groove, and an annular protrusion that can slide in the spring groove is provided at a position matching the spring groove in the flange connecting seat, and the annular protrusion abuts against the built-in spring.

[0014] Specifically, the docking portion includes a flange connection seat, an FC connection seat threadedly connected in the flange connection seat, and a ceramic sleeve sleeved in the flange connection seat, and through holes for light paths to pass through are arranged at the axes of the flange connection seat, the FC connection seat, and the ceramic sleeve.

[0015] Specifically, the ceramic sleeve includes a cylinder and an annular boss, the cylinder is attached to the inner wall of the FC connection seat, and the annular boss is clamped between the FC connection seat and the flange connection seat.

[0016] Specifically, a threaded hole penetrating the side wall of the outer sleeve is provided at a position corresponding to the flange connection seat, the first fastening bolt is threadedly connected in the threaded hole, and the end of the first fastening bolt abuts against the side wall of the flange connection seat.

[0017] Specifically, the detection part includes a flange fixing seat, in which a mounting groove is arranged, in which a front fixed guide seat, a photoelectric detector and a rear fixed guide seat are coaxially arranged in sequence, and the photoelectric detector is clamped between the front fixed guide seat and the rear fixed guide seat.

[0018] Specifically, the rear fixed guide seat and the flange fixed seat are detachably connected via connecting bolts.

[0019] Specifically, the front fixed guide seat and the rear fixed guide seat are made of insulating material.

[0020] Specifically, a threaded hole penetrating the side wall of the outer sleeve is provided at a position corresponding to the flange fixing seat, the second fastening bolt is threadedly connected in the threaded hole, and the end of the second fastening bolt abuts against the side wall of the flange fixing seat.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. In the high-sensitivity photoelectric detection module provided by the present invention, the distance between the ceramic ferrule and the photoelectric detector can be adjusted, so that each photoelectric detector can exert its best detection performance, improve the detection sensitivity, and improve the product yield.

[0023] 2. The high-sensitivity photoelectric detection module provided by the present invention has an additional annular boss designed in the ceramic sleeve. The annular boss is clamped between the FC connecting seat and the flange connecting seat to fix the ceramic sleeve and prevent the ceramic sleeve from shaking in the FC connecting seat, thereby solving the problem of test error caused by shaking of the ceramic sleeve. The annular boss can also prevent the ceramic insert from colliding with the FC connecting seat to produce metal particles.

[0024] 3. The high-sensitivity photoelectric detection module provided by the present invention has a detachable FC connecting seat and a flange connecting seat, and a detachable rear fixed guide seat and a flange fixing seat. When there are particles or dust on the chamber through which the light path passes and the lens of the photoelectric detector, they can be disassembled and cleaned, and the adsorbed particles can be easily removed. The test accuracy will not decrease with the passage of time, which reduces the use cost of the photoelectric detection module and extends its service life.

[0025] 4. The front fixed guide seat and the rear fixed guide seat made of insulating material clamp the photodetector in the middle. The photodetector is not in direct contact with the external environment, which reduces the influence of dark current in the environment and improves the reliability of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a cross-sectional view of the overall structure of the present invention;

[0027] Figure 2 It is an enlarged view of the connection part of the present invention;

[0028] Figure 3 This is an enlarged view of the connection portion of the ceramic ferrule in the inserted state of the present invention.

[0029] Figure numerals: 1. Ceramic sleeve; 2. FC connecting seat; 3. Flange connecting seat; 4. Retaining spring; 5. Outer sleeve; 6. Built-in spring; 7. Flange fixing seat; 8. Rear fixing guide seat; 9. Front fixing guide seat; 10. Photoelectric detector; 11. Connecting bolt; 12. First fastening bolt; 13. Second fastening bolt; 14. Ceramic ferrule; 15. Cylinder; 16. Annular boss; 17. Arc surface; 18. Notch. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. The specific implementation of the present invention is described in detail below in combination with specific embodiments.

[0031] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0032] like Figure 1-Figure 3 As shown, the present invention provides a high-sensitivity photoelectric detection module, including a docking part, a detection part and an outer sleeve 5 sleeved on the outside of the docking part and the detection part, the docking part is used to fix a ceramic ferrule 14 inserted into the docking part, the detection part and the docking part are coaxially arranged, a photoelectric detector 10 is arranged in the detection part, and is used to receive the optical signal emitted by the ceramic ferrule 14, the outer sleeve 5 is sleeved on the outside of the docking part and the detection part, one side of the outer sleeve 5 is rotatably connected to the docking part, and the other side of the outer sleeve 5 is threadedly connected to the detection part, and the distance between the ceramic ferrule 14 and the photoelectric detector 10 is adjusted by relative rotation between the outer sleeve 5 and the flange fixing seat 7, so that each photoelectric detector 10 can exert its best detection performance.

[0033] The docking part includes a coaxially arranged flange connecting seat 3, an FC connecting seat 2 and a ceramic sleeve 1, the detection part includes a coaxially arranged flange fixing seat 7, a rear fixed guide seat 8, a front fixed guide seat 9 and a photoelectric detector 10, and the outer sleeve 5 is sleeved on the outer side of the flange connecting seat 3 and the flange fixing seat 7.

[0034] A first guide groove is provided on one side of the inner wall of the outer sleeve 5, a second guide groove matching the first guide groove is provided on the outer wall of the flange connection seat 3, and the retaining spring 4 is clamped between the first guide groove and the second guide groove, so that the outer sleeve 5 is rotatably connected to the flange connection seat 3. An internal thread is provided on the other side of the inner wall of the outer sleeve 5, and an external thread matching the internal thread is provided in the flange fixing seat 7, and the flange fixing seat 7 is threadedly connected to the outer sleeve 5. The flange connection seat 3 and the flange fixing seat 7 enclose a chamber through which the light path can pass, and the ceramic ferrule 14 and the photodetector 10 are arranged at both ends of the chamber, and the distance from the ceramic ferrule 14 to the photodetector 10 is adjusted by relative rotation between the outer sleeve 5 and the flange fixing seat 7.

[0035] By adjusting the distance between the detection part and the docking part through the outer sleeve 5, the distance between the ceramic ferrule 14 in the external optical fiber connector and the high-sensitivity photodetector 10 can be quickly adjusted, ensuring that each photodetector 10 exerts its best detection performance, which can effectively solve the current problem of low yield of high-sensitivity photoelectric detection modules.

[0036] Furthermore, a spring groove is provided on the side of the flange fixing seat 7 close to the flange connection seat 3, a built-in spring 6 is installed in the spring groove, and an annular protrusion that can slide in the spring groove is provided at a position matching the spring groove in the flange connection seat 3, and the annular protrusion abuts against the built-in spring 6. The built-in spring 6 pushes the flange connection seat 3 outward, further improving the tightness of the thread fit between the outer sleeve 5 and the flange fixing seat 7, and eliminating the distance error from the ceramic ferrule 14 to the photoelectric detector 10 caused by the thread gap between the internal and external threads.

[0037] The FC connector 2 is a hollow cylinder, one end of which is a plug-in end, and a notch 18 is provided in the plug-in end for positioning and guiding the ceramic ferrule 14, so as to ensure that the ceramic ferrule 14 is smoothly inserted into the FC connector 2; the other end of the FC connector 2 is a connecting end, and an external thread is provided at the connecting end of the FC connector 2, and an internal thread matching the external thread of the FC connector 2 is provided at the axis of the flange connector 3, and the FC connector 2 is threadedly connected with the flange connector 3. A ceramic sleeve 1 is provided on the inner side of the FC connector 2, and the ceramic sleeve 1 includes a cylinder 15 and an annular boss 16, the cylinder 15 is attached to the inner wall of the FC connector 2, and the annular boss 16 is provided on the inner side of the FC connector 2 and clamped between the FC connector 2 and the flange connector 3, so as to fix the ceramic sleeve 1. A through hole through which the optical path passes is coaxially provided in the flange connector 3, the FC connector 2 and the annular boss 16.

[0038] When the existing optical fiber connector is connected to the photodetector 10 module, the ceramic ferrule 14 on the optical fiber connector will pass through the ceramic sleeve 1 and frequently collide with the bottom of the FC connector 2. The hardness of the ceramic ferrule 14 is greater than that of the metal FC connector 2, which can easily cause the FC connector 2 to drop metal particles to block the light path, resulting in a decrease in test accuracy, and reduce the service life of the photodetection module, increasing maintenance costs. Therefore, an annular boss 16 is added to the bottom of the ceramic sleeve 1 to block between the ceramic ferrule 14 and the FC connector 2 to prevent the ceramic ferrule 14 from contacting the FC connector 2 and to prevent metal particles from falling due to the collision between the ceramic ferrule 14 and the FC connector 2. A circular arc surface 17 is provided in the annular boss 16, and the circular arc surface 17 better fits with the ceramic ferrule 14, so that the ceramic sleeve 1 better fits with the ceramic ferrule 14, and further reduces the collision between the annular boss 16 and the ceramic ferrule 14 to generate particles.

[0039] In the existing structure, there is usually a clearance fit between the ceramic sleeve 1 and the FC connector 2, and the ceramic sleeve 1 can shake freely in the FC connector 2. When light passes through the ceramic sleeve 1 and shines on the photodetector 10, the position of each illumination is inconsistent. During high-sensitivity power testing, a large test error will occur, resulting in poor repeatability of indicators. Therefore, an annular boss 16 is designed, and the annular boss 16 is clamped between the FC connector 2 and the flange connector 3 to fix the ceramic sleeve 1, which can prevent the ceramic sleeve 1 from shaking in the FC connector 2, thereby preventing the ceramic ferrule 14 in the optical fiber connector from shaking in the sleeve, so that the light emitted by the ceramic ferrule 14 shines on the photodetector 10 at a consistent position, solving the problem of test errors caused by the shaking of the ceramic sleeve 1.

[0040] During the process of inserting the ceramic ferrule 14 into the ceramic sleeve 1, ceramic particles may fall and block the light path due to the friction between the ceramic ferrule 14 and the sleeve. The FC connector 2 and the flange connector 3 are detachably connected by threads. The FC connector 2 and the ceramic sleeve 1 can be disassembled and the particles can be cleaned with clean air, which ensures the test accuracy, extends the service life, and reduces the use cost of the photoelectric detection module.

[0041] Corresponding to the position of the flange connection seat 3, a threaded hole penetrating the side wall of the outer sleeve 5 is provided, and the first fastening bolt 12 is threadedly connected in the threaded hole, and its end abuts against the side wall of the flange connection seat 3, for fixing the relative position of the outer sleeve 5 and the flange connection seat 3. After the FC connection seat 2 is installed in the flange connection seat 3, the flange connection seat 3 is fixed with the first bolt, so that the notch 18 of the FC connection seat 2 installed in the flange connection seat 3 faces the specified direction (such as setting the notch 18 upward), and the ceramic ferrule 14 in the external optical fiber connector is inserted into the ceramic sleeve 1 of the docking part at a fixed angle each time, so as to minimize the fluctuation of indicators during repeated tests and improve the accuracy of repeated tests.

[0042] The outer wall of the flange fixing seat 7 is threadedly connected to the outer sleeve 5. The flange fixing seat 7 is a hollow structure. A stepped mounting groove is provided in the flange fixing seat 7. The front fixed guide seat 9, the photodetector 10 and the rear fixed guide seat 8 are sequentially installed in the mounting groove, and the photodetector 10 is clamped between the front fixed guide seat 9 and the rear fixed guide seat 8. The front fixed guide seat 9 is annular, and the inner wall of the front fixed guide seat 9 abuts against the outer side of the photodetector 10, and the outer wall of the front fixed guide seat 9 is engaged in the mounting groove. The front fixed guide seat 9 and the rear fixed guide seat 8 are made of insulating materials, and the photodetector 10 is clamped and fixed in the flange fixing seat 7. The photodetector 10 does not contact the flange fixing seat 7, so as to avoid the dark current generated by thermal excitation or other non-light factors in the environment affecting the reliability of the photodetector 10.

[0043] Since the flange fixing seat 7, the front fixing guide seat 9, the photoelectric detector 10 and the rear fixing guide seat 8 are coaxially arranged, the front fixing guide seat 9, the photoelectric detector 10 and the rear fixing guide seat 8 are vertically inserted into the mounting groove from the rear side of the flange fixing seat 7, and the flange fixing seat 7 is fixedly connected with the rear fixing guide seat 8 by the connecting bolts 11. This vertical mounting method prevents particles generated by the friction between the front fixing guide seat 9 and the rear fixing guide seat 8 and the inner wall of the flange fixing seat 7 from entering the light path through the chamber or on the lens of the photoelectric detector 10.

[0044] As time goes by, the test accuracy of the existing photoelectric detection module decreases due to excessive accumulation of particles in the optical path, which affects the service life of the photoelectric detection module. The rear fixed guide seat 8 of the present application is connected to the flange fixing seat 7 by a connecting bolt 11. When there is dust in the chamber, which affects the test accuracy of the photoelectric detector 10, the connecting bolt 11 can be removed to take out the photoelectric detector 10, and the chamber and the lens can be cleaned with clean air to blow off the particles adsorbed in the chamber and on the lens, and then reinstalled into the flange fixing seat 7. This design ensures the test accuracy, extends the service life of the photoelectric detection module, and reduces the cost of use. When the photoelectric detector 10 is damaged, the photoelectric detector 10 can be taken out and replaced, and the remaining parts can be reused, which reduces the cost of use of the photoelectric detection module.

[0045] A threaded hole penetrating the side wall of the outer sleeve 5 is provided at the position corresponding to the flange fixing seat 7. The second fastening bolt 13 is threadedly connected in the threaded hole, and its end abuts against the side wall of the flange fixing seat 7, and is used to fix the relative position of the outer sleeve 5 and the flange fixing seat 7, and lock the distance between the ceramic ferrule 14 and the photoelectric detector 10. After adjusting the distance between the ceramic ferrule 14 and the photoelectric detector 10, tighten the second bolt to fix the distance between the photoelectric detector 10 and the ceramic ferrule 14.

[0046] During installation, first assemble the docking part and the detection part separately, install the FC connecting seat 2 provided with the ceramic sleeve 1 into the flange connecting seat 3, clamp the photoelectric detector 10 between the front fixed guide seat 9 and the rear fixed guide seat 8, and connect the rear fixed guide seat 8 with the flange fixing seat 7 through the connecting bolt 11; use the retaining ring 4 to connect the flange connecting seat 3 with the outer sleeve 5; set the spring 6 in the spring groove, and thread the flange fixing seat 7 into the outer sleeve 5, and adjust the distance between the flange fixing seat 7 and the flange connecting seat 3; use the second fastening bolt 13 to fix the distance between the flange fixing seat 7 and the flange connecting seat 3; finally, adjust the FC connecting seat 2 to the specified direction, and use the first fastening bolt 12 to fix the direction of the FC connecting seat 2.

[0047] The above is only a preferred embodiment of the present invention, and does not limit the present invention in other forms. Any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention still belongs to the protection scope of the technical solution of the present invention.

Claims

1. A high-sensitivity photoelectric detection module, characterized in that: include: A docking portion, used to fix a ceramic insert (14) inserted into the docking portion and capable of emitting an optical signal; A detection part, the detection part being coaxially arranged with the docking part, wherein a photoelectric detector (10) is arranged in the detection part and is used to receive a light signal emitted by the ceramic ferrule (14); An outer sleeve (5), the outer sleeve (5) being sleeved on the outside of the docking portion and the detection portion, one side of the outer sleeve (5) being rotationally connected to the docking portion, and the other side of the outer sleeve (5) being threadedly connected to the detection portion, and the distance between the ceramic ferrule (14) and the photoelectric detector (10) being adjusted by relative rotation between the outer sleeve (5) and the flange fixing seat (7).

2. The high-sensitivity photoelectric detection module according to claim 1, characterized in that: A flange connection seat (3) is provided in the docking portion, a flange fixing seat (7) is provided in the detection portion, a first guide groove is provided on one side of the inner wall of the outer sleeve (5), a second guide groove matching the first guide groove is provided on the outer wall of the flange connection seat (3), a retaining spring (4) is clamped between the first guide groove and the second guide groove, an internal thread is provided on the other side of the inner wall of the outer sleeve (5), an external thread matching the internal thread is provided in the flange fixing seat (7), and the flange fixing seat (7) is threadedly connected to the outer sleeve (5).

3. The high-sensitivity photoelectric detection module according to claim 2, characterized in that: A spring groove is provided on one side of the flange fixing seat (7) close to the flange connecting seat (3), a built-in spring (6) is provided in the spring groove, and an annular protrusion that can slide in the spring groove is provided at a position matching the spring groove in the flange connecting seat (3), the annular protrusion abutting against the built-in spring (6).

4. The high-sensitivity photoelectric detection module according to claim 1, characterized in that: The docking portion comprises a flange connection seat (3), an FC connection seat (2) threadedly connected to the flange connection seat (3), and a ceramic sleeve (1) sleeved in the flange connection seat (3), wherein through holes through which a light path passes are arranged at the axes of the flange connection seat (3), the FC connection seat (2), and the ceramic sleeve (1).

5. The high-sensitivity photoelectric detection module according to claim 4, characterized in that: The ceramic sleeve (1) comprises a cylinder (15) and an annular boss (16); the cylinder (15) is fitted onto the inner wall of the FC connection seat (2); and the annular boss (16) is clamped between the FC connection seat (2) and the flange connection seat (3).

6. The high-sensitivity photoelectric detection module according to claim 4, characterized in that: A threaded hole penetrating the side wall of the outer sleeve (5) is provided at a position corresponding to the flange connection seat (3), and a first fastening bolt (12) is threadedly connected in the threaded hole, with the end of the first fastening bolt (12) abutting against the side wall of the flange connection seat (3).

7. The high-sensitivity photoelectric detection module according to claim 1, characterized in that: The detection unit comprises a flange fixing seat (7), a mounting groove is provided in the flange fixing seat (7), a front fixing guide seat (9), a photoelectric detector (10) and a rear fixing guide seat (8) are coaxially arranged in sequence in the mounting groove, and the photoelectric detector (10) is clamped between the front fixing guide seat (9) and the rear fixing guide seat (8).

8. The high-sensitivity photoelectric detection module according to claim 7, characterized in that: The rear fixed guide seat (8) and the flange fixed seat (7) are detachably connected via connecting bolts (11).

9. The high-sensitivity photoelectric detection module according to claim 7, characterized in that: The front fixed guide seat (9) and the rear fixed guide seat (8) are made of insulating material.

10. The high-sensitivity photoelectric detection module according to claim 7, characterized in that: A threaded hole penetrating the side wall of the outer sleeve (5) is provided at a position corresponding to the flange fixing seat (7), and a second fastening bolt (13) is threadedly connected in the threaded hole, with an end of the second fastening bolt (13) abutting against the side wall of the flange fixing seat (7).

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