CN218824808U - Coaxial single-mode beam expanding contact element for light output - Google Patents
Coaxial single-mode beam expanding contact element for light output Download PDFInfo
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- CN218824808U CN218824808U CN202223499985.6U CN202223499985U CN218824808U CN 218824808 U CN218824808 U CN 218824808U CN 202223499985 U CN202223499985 U CN 202223499985U CN 218824808 U CN218824808 U CN 218824808U
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Abstract
The utility model relates to a coaxial single mode of light-emitting expands beam contact spare, including self-focusing lens, sleeve pipe, optic fibre lock pin, ring flange, shell body and optic fibre, the rear end inclined plane of self-focusing lens and the front end inclined plane of optic fibre lock pin set up at the interval in the front-back direction to form the axial clearance between rear end inclined plane and the front end inclined plane, through the solidification of point gum in the axial clearance in order to realize that the coaxial bonding of self-focusing lens is fixed in the front end of optic fibre lock pin, and the light-emitting optical axis of self-focusing lens is coaxial with optic fibre lock pin; the sleeve is coaxially sleeved outside the optical fiber ferrule, and the self-focusing lens is coaxially bonded and fixed in the sleeve; the optical fiber insertion core is assembled in the optical fiber insertion core hole of the flange plate in an interference mode, the optical fiber penetrates through the flange plate, and the fiber core of the optical fiber penetrates through the inner hole of the optical fiber insertion core. The utility model has the characteristics of low insertion loss, high return loss have compensatied current beam expanding contact spare low, the production packaging efficiency low scheduling problem of qualification rate, and have improved the life of product.
Description
Technical Field
The utility model belongs to the technical field of the optic fibre contact, concretely relates to coaxial single-mode beam expanding contact of light-emitting.
Background
The single-mode beam expanding optical contact element is a basic core device in the field of optical fiber communication, is a non-contact optical fiber connector, and is used for compressing a beam divergence angle of a divergent beam emitted by an optical fiber into a collimated beam through a self-focusing lens, transmitting the collimated beam through a space distance, then injecting the collimated beam into another self-focusing lens, and simultaneously focusing the collimated beam into a point light source coupled into the optical fiber.
The fitting among all parts of the conventional single-mode beam expanding contact piece is very tight, so that the requirement on the processing precision of all devices is high, the center alignment is ensured by a mechanical processing mode, and the coaxial non-deflection angle of light emission is realized. In addition, the end face of the optical fiber is ground to form an oblique angle of 8-10 degrees, so that a deflection angle of about 0.5 degree is formed between the light beam and a mechanical axis after the light beam is emitted, when two single-mode beam expanding contact pieces are butted for use, the light emitted by the optical fiber in the first single-mode beam expanding contact piece is incident into the second single-mode beam expanding contact piece and cannot be coupled into the optical fiber, and the light must be corrected through later debugging or adding an angle compensation sheet for use, so that the existing light-emitting coaxial single-mode beam expanding contact piece is low in production efficiency and low in qualified rate.
SUMMERY OF THE UTILITY MODEL
For solving the technical problem of current single mode beam expanding contact member light-emitting disalignment, the utility model provides a coaxial single mode beam expanding contact member of light-emitting can realize through the mode of debugging that the light-emitting is coaxial, guarantees optical signal's stable transmission, improves production efficiency, product percent of pass and life.
The purpose of the utility model and the technical problem thereof are realized by adopting the following technical scheme. According to the utility model provides a coaxial single-mode beam expanding contact piece of light-emitting, including self-focusing lens, sleeve pipe, optic fibre lock pin, ring flange, shell body and optic fibre, the rear end inclined plane of self-focusing lens and the front end inclined plane of optic fibre lock pin set up at the interval in the front-back direction to form the axial clearance between rear end inclined plane and the front end inclined plane, through the curing of point gum in the axial clearance in order to realize that the coaxial bonding of self-focusing lens is fixed in the front end of optic fibre lock pin, and the light-emitting optical axis of self-focusing lens is coaxial with optic fibre lock pin; the sleeve is coaxially sleeved outside the optical fiber ferrule, and the self-focusing lens is coaxially bonded and fixed in the sleeve; the optical fiber inserting core is assembled in the optical fiber inserting core hole of the flange plate in an interference manner, the optical fiber is arranged in the flange plate in a penetrating manner, and the fiber core of the optical fiber is arranged in the inner hole of the optical fiber inserting core in a penetrating manner; the shell body is sleeved outside the flange plate, a compression spring is arranged between the shell body and the flange plate, and the compression spring is used for providing forward jacking force for the flange plate so that the flange plate is tightly jacked on a closing-in part at the front end of the shell body.
Further, the front end surface of the self-focusing lens is lower than the front end surface of the sleeve in the forward direction, thereby avoiding damage to the front end surface of the self-focusing lens when the beam expanding contact is butted.
Furthermore, 353ND glue is poured into the front end hole of the flange plate, so that the sleeve is sleeved on the optical fiber inserting core and then is fixedly adhered to the flange plate.
Furthermore, the optical fiber compression joint device further comprises a compression joint sleeve, an outer sheath of the optical fiber is sleeved on the rear end of the flange plate, and the compression joint sleeve is used for compressing the outer sheath at the rear end of the flange plate, so that the optical fiber is ensured to have certain tensile capacity.
Furthermore, a convex key is arranged on the flange plate, and a key groove matched with the convex key in a radial rotation stopping way is arranged on the outer shell.
Furthermore, the included angle between the rear end inclined plane/the front end inclined plane and the radial plane of the beam expanding contact element is 8-10 degrees.
The utility model has the advantages that: the utility model relates to a single mode beam expanding contact spare with low insertion loss, high return loss has compensatied that current beam expanding contact spare qualification rate is low, need to pair the lower scheduling problem of screening, production packaging efficiency, has solved the high problem that leads to processing difficulty, qualification rate low of self-focusing lens precision, the utility model discloses ensure the coaxial fixing at optic fibre lock pin front end with the debugging mode with self-focusing lens, need not to assemble and test or correct the operation after accomplishing again, possess beneficial effect such as production simple process, production efficiency height, product long service life.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented according to the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more obvious and understandable, the following preferred embodiments are described in detail with reference to the accompanying drawings.
Drawings
Fig. 1 is the utility model relates to a coaxial single-mode beam expanding contact's of light-emitting section structure sketch map.
Fig. 2 is a debugging device for debugging the utility model discloses the coaxial single-mode beam expanding contact's of light-emitting debugging principle schematic diagram.
Detailed Description
The technical solution of the present invention will be further described in detail with reference to the accompanying drawings and preferred embodiments.
As shown in fig. 1, a coaxial single-mode beam expanding contact for outgoing light, which has a front end as one end inserted into an adapting contact, includes a self-focusing lens 1, a sleeve 2, an optical fiber ferrule 3, a flange 4, a compression spring 5, an outer shell 6, a crimping sleeve 7 and an optical fiber 8, wherein the outer peripheral surface of the self-focusing lens 1 is in clearance fit with the inner peripheral surface of the sleeve 2, and the self-focusing lens 1 is sleeved in the sleeve 2; self-focusing lens 1 uses debugging equipment and guarantees through the mode of debugging that the light-emitting optical axis is coaxial with optic fibre lock pin 3, particularly, the coaxial bonding of self-focusing lens 1 is fixed at 3 front ends of optic fibre lock pins, and the interval sets up in the front and back direction with the front end inclined plane 31 of optic fibre lock pin 3 on the rear end inclined plane 11 of self-focusing lens 1, light path transmission can be realized with the cooperation of front end inclined plane 31 to rear end inclined plane 11, in this embodiment, rear end inclined plane 11/front end inclined plane 31 is 8 to 10 with the radial plane contained angle of the contact piece that expands, radial, it is radial
The plane extending direction is vertical to the front and back direction, and the back end inclined plane and the front end inclined plane can be arranged in parallel; 5 further, the interval is set so that the front end inclined surface 31 and the rear end inclined surface 11 have an axial gap 9 therebetween,
the axial gap 9 can effectively prevent the front end inclined plane of the optical fiber ferrule from contacting and damaging the rear end inclined plane of the self-focusing lens, and can realize the coaxial bonding fixation of the self-focusing lens 1 and the optical fiber ferrule 3 after the glue is dispensed and cured in the axial gap 9, and the light outlet optical axis and the light of the self-focusing lens are ensured after the fixation
The fiber insertion cores are coaxial; then the sleeve 2 is coaxially sleeved on the optical fiber insertion core3 and a self-focusing lens 1 0 The whole is placed inside the sleeve 2, and the self-focusing lens 1 is bonded to the sleeve 2 using UV glue.
In this embodiment, the front end surface 12 of the self-focusing lens 1 is lower than the front end surface of the sleeve 2 in the forward direction, so as to avoid damaging the front end surface 12 of the self-focusing lens and prolong the service life of the contact when two single/multi-mode beam expanding contacts are in butt joint.
The optical fiber ferrule 3 and the flange plate 4 are in interference fit, and the optical fiber ferrule 3 is pressed and connected by using a special tool 5 In the fiber ferrule hole 41 of the flange 4. The inner peripheral surface of the sleeve 2 is matched with the outer peripheral surface of the optical fiber ferrule 3 in a high-precision mode, the purpose is to ensure that the sleeve 2 and the mechanical shaft of the optical fiber ferrule 3 are coaxial, the optical fiber 8 penetrates through the flange plate 4, and the fiber core of the optical fiber 8 is fixedly penetrated in the inner hole of the optical fiber ferrule 3 through 353ND glue. The sleeve 2 is sleeved on the flange plate 4 by injecting 353ND glue into the front end hole 42 of the flange plate
And the relative bonding positioning of the sleeve and the flange plate is realized after the optical fiber inserting core. The outer shell 6 is sleeved on the flange plate 4 0 On, and be equipped with between shell body and the ring flange compression spring 5, compression spring adopt the cylindrical compression spring of suit outside the ring flange, and compression spring 5 is used for providing forward top thrust for ring flange 4, makes the ring flange top tightly on 6 front ends of shell body inwards bend the binding off portion 61 that forms, and binding off portion 61 can prevent that the ring flange from deviating from forward in the shell body. When the contact elements are inserted oppositely, the flange plate can be relatively to the shaft of the outer shell body
Retreating to realize axial floating butt joint function. The outer sheath of the optical fiber 8 is sleeved behind the flange plate 4 5 And the end is in compression joint with the rear end of the flange plate in a sleeved manner and compresses the outer sheath on the flange plate, so that the optical fiber 8 is ensured to have certain tensile capacity, and the optical fiber core is prevented from being separated from the optical fiber core insert 3. In addition, the flange 4 is provided with a convex key 43 protruding in the radial direction, and the outer shell is provided with a key groove 62 matched with the convex key in the radial rotation stopping way.
In order to complete the assembly of the single-mode beam expanding contact element, a reflection method debugging device is adopted for debugging and connecting 0 Referring to fig. 2, the commissioning device is provided with two clamps and a mirror 13, twoThe fixture is respectively a fixture I10 and a fixture II 15, the reflector 13 is fixed on a reflector adjusting frame 14, the fixture I10 is fixed on the optical platform, the fixture II is connected with the existing five-dimensional adjusting frame, the fixture II can move along five directions of up-down, front-back, left-right, pitching and yawing, and the fixture I10 is provided with a positioning optical fiber plug
A precision V groove I101 of the core 3 and a precision V used for positioning the self-focusing lens 1 are arranged on the clamp II 15 5 And a groove II 151. The precise V-shaped groove I needs to be guaranteed to be perpendicular to the mirror surface of the reflector 13, a standard sample is taken in a perpendicular mode, and the light outlet optical axis of the standard sample and the outer circular surface of the standard sample need to be coaxial. At least more than 20 single-mode beam expanding contact pieces are selected for the standard sample, an insertion return loss instrument is used for carrying out 10 x 10 matrix butt joint test on the optical performance, and the butt joint optical performance of the screened standard sample and other 19 single-mode beam expanding contact pieces is optimal. Then, a standard sample is clamped in the precise V-shaped groove I on the clamp I, the damaged instrument is inserted back to connect the circulator, and the tail fiber of the standard sample is correctly connected with the circulator. Meanwhile, the insertion loss value displayed on the insertion return loss instrument is checked, and the insertion loss value is enabled to reach the minimum value, generally 1.2-1.5 dB, by adjusting the reflector adjusting frame 14. After the insertion loss value is adjusted to be minimum, the standard sample is rotated, if the insertion loss value displayed on the insertion return loss instrument is increased, the reflector frame is adjusted again, the two actions are repeated until the standard sample rotates 360 degrees, the difference value between the maximum insertion loss value and the minimum insertion loss value displayed on the insertion return loss instrument is not more than 0.1dB, and at the moment, the precise V-shaped groove I on the clamp I is perpendicular to the mirror surface of the reflector 13.
After the perpendicularity debugging of the clamp I and the reflector 13 is completed, the optical fiber ferrule 3 is clamped in the precise V-shaped groove I, the self-focusing lens 1 is clamped in the precise V-shaped groove II, the tail fiber on the optical fiber ferrule 3 is connected with the circulator on the insertion return loss instrument, the self-focusing lens can realize displacement in five directions by adjusting five knobs on a five-dimensional adjusting frame connected with the clamp II, and the debugging can be stopped when the insertion loss value displayed on the insertion return loss instrument is 1.2-1.5 dB. At the moment, it can be judged that light emitted by the optical fiber passes through the self-focusing lens 1, the optical axis after the light is emitted is coaxial with the central axis of the optical fiber ferrule 3, then UV glue is used for dispensing and curing at the junction of the front end inclined plane of the optical fiber ferrule 3 and the rear end inclined plane of the self-focusing lens 1, the optical fiber ferrule 3 and the self-focusing lens 1 are detached from the clamp I and the clamp II after curing is finished, 353ND glue is dispensed into the front end hole 42 of the flange plate, finally the sleeve 2 is sleeved on the optical fiber ferrule 3 and placed on an optical fiber curing furnace for curing, and debugging of the single-mode beam expanding contact is finished.
As mentioned above, the preferred embodiments of the present invention are only preferred, and the details are not described in detail, which are the prior art, and of course, other existing debugging devices can be adopted to implement coaxial debugging and fixing of the self-focusing lens and the optical fiber ferrule; any person skilled in the art can make any simple modification, equivalent change and modification to the above embodiments according to the technical spirit of the present invention without departing from the scope of the technical solution of the present invention, and still fall within the scope of the technical solution of the present invention.
Claims (6)
1. The utility model provides a coaxial single-mode contact piece that expands of light-emitting which characterized in that: the optical fiber self-focusing device comprises a self-focusing lens, a sleeve, an optical fiber ferrule, a flange plate, an outer shell and an optical fiber, wherein a rear end inclined plane of the self-focusing lens and a front end inclined plane of the optical fiber ferrule are arranged at intervals in the front-rear direction so as to form an axial gap between the rear end inclined plane and the front end inclined plane, the self-focusing lens is coaxially bonded and fixed at the front end of the optical fiber ferrule by glue dispensing and curing in the axial gap, and an emergent light optical axis of the self-focusing lens is coaxial with the optical fiber ferrule; the sleeve is coaxially sleeved outside the optical fiber ferrule, and the self-focusing lens is coaxially bonded and fixed in the sleeve; the optical fiber inserting core is assembled in the optical fiber inserting core hole of the flange plate in an interference manner, the optical fiber is arranged in the flange plate in a penetrating manner, and the fiber core of the optical fiber is arranged in the inner hole of the optical fiber inserting core in a penetrating manner; the shell body is sleeved outside the flange plate, a compression spring is arranged between the shell body and the flange plate, and the compression spring is used for providing forward jacking force for the flange plate so that the flange plate is tightly jacked on a closing-in part at the front end of the shell body.
2. The light exiting coaxial single-mode expanded beam contact of claim 1, wherein: the front end surface of the self-focusing lens is lower than the front end surface of the ferrule in the forward direction.
3. The optical launch coaxial single-mode beam expanded contact of claim 1, wherein: 353ND glue is poured into the front end hole of the flange plate, so that the sleeve is sleeved on the optical fiber inserting core to be fixedly adhered to the flange plate.
4. The optical launch coaxial single-mode beam expanded contact of claim 1, wherein: the optical fiber cable connector further comprises a crimping sleeve, the outer sheath of the optical fiber is sleeved on the rear end of the flange plate, and the crimping sleeve is used for tightly pressing the outer sheath at the rear end of the flange plate.
5. The optical launch coaxial single-mode beam expanded contact of claim 1, wherein: the flange plate is provided with a convex key, and the outer shell is provided with a key groove which is matched with the convex key in a radial rotation stopping way.
6. The optical launch coaxial single-mode beam expanded contact of claim 1, wherein: the back end inclined plane/front end inclined plane and the radial plane of the beam expanding contact piece form an included angle of 8-10 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223499985.6U CN218824808U (en) | 2022-12-27 | 2022-12-27 | Coaxial single-mode beam expanding contact element for light output |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223499985.6U CN218824808U (en) | 2022-12-27 | 2022-12-27 | Coaxial single-mode beam expanding contact element for light output |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218824808U true CN218824808U (en) | 2023-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223499985.6U Active CN218824808U (en) | 2022-12-27 | 2022-12-27 | Coaxial single-mode beam expanding contact element for light output |
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| Country | Link |
|---|---|
| CN (1) | CN218824808U (en) |
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- 2022-12-27 CN CN202223499985.6U patent/CN218824808U/en active Active
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