CN113219595A - Detachable beam expanding type optical fiber contact element - Google Patents
Detachable beam expanding type optical fiber contact element Download PDFInfo
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- CN113219595A CN113219595A CN202110335253.4A CN202110335253A CN113219595A CN 113219595 A CN113219595 A CN 113219595A CN 202110335253 A CN202110335253 A CN 202110335253A CN 113219595 A CN113219595 A CN 113219595A
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- optical fiber
- ferrule
- lens
- contact
- contact element
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating means
- G02B6/3807—Dismountable connectors, i.e. comprising plugs
- G02B6/381—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres
- G02B6/3826—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres characterised by form or shape
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating means
- G02B6/3807—Dismountable connectors, i.e. comprising plugs
- G02B6/3833—Details of mounting fibres in ferrules; Assembly methods; Manufacture
- G02B6/3853—Lens inside the ferrule
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating means
- G02B6/3807—Dismountable connectors, i.e. comprising plugs
- G02B6/3833—Details of mounting fibres in ferrules; Assembly methods; Manufacture
- G02B6/3855—Details of mounting fibres in ferrules; Assembly methods; Manufacture characterised by the method of anchoring or fixing the fibre within the ferrule
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating means
- G02B6/3807—Dismountable connectors, i.e. comprising plugs
- G02B6/389—Dismountable connectors, i.e. comprising plugs characterised by the method of fastening connecting plugs and sockets, e.g. screw- or nut-lock, snap-in, bayonet type
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Coupling Of Light Guides (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
The invention discloses a detachable beam-expanding type optical fiber contact element, which comprises: the optical fiber cable connector comprises a ferrule assembly, a contact piece shell, a spring, a sliding ring, a baffle ring, a compression joint sleeve, aramid fibers and an optical cable outer sheath; the ferrule assembly comprises a ceramic sleeve, a G-lens, a ferrule and an optical fiber. The invention optimizes the fixing structure of the optical fiber contact element and improves the installation efficiency of the optical fiber contact element.
Description
Technical Field
The invention belongs to the technical field of optical fiber communication, and particularly relates to a detachable beam expanding type optical fiber contact element.
Background
With the gradual development of the application of the optical fiber communication technology in military weaponry, the optical fiber connector is increasingly applied to various occasions as the optical passive component with the largest use amount in the optical communication system, however, the conventional optical fiber connector adopts optical fiber contact connection in the butt joint, the optical performance of the optical fiber connector is reduced under the influence of dust particles and the like, particularly, the service environment of military products is severe, and the use reliability of the optical fiber connector becomes a bottleneck restricting the optical fiber technology in the military field applicator.
Disclosure of Invention
The technical problem solved by the invention is as follows: the defects of the prior art are overcome, the detachable beam-expanding type optical fiber contact element is provided, the fixing structure of the optical fiber contact element is optimized, and the installation efficiency of the optical fiber contact element is improved.
The purpose of the invention is realized by the following technical scheme: a removable expanded beam optical fiber contact, comprising: the optical fiber cable connector comprises a ferrule assembly, a contact piece shell, a spring, a sliding ring, a baffle ring, a compression joint sleeve, aramid fibers and an optical cable outer sheath; the ferrule assembly comprises a ceramic sleeve, a G-lens, a ferrule and an optical fiber; the G-lens is arranged in the inner cavity of the ceramic sleeve, and a gap is reserved between the flat end surface of the G-lens and the front end surface of the ceramic sleeve; one end of the ferrule is embedded in the G-lens, and the other end of the ferrule is connected with one end of the optical fiber; the ferrule assembly is in interference press-fit connection with the contact piece shell; the spring and the slip ring are sleeved on the outer surface of the contact element shell, one end of the spring is pressed with the boss of the contact element shell, and the other end of the spring is pressed with one end of the slip ring; one end of the retaining ring is connected with one end of the contact element shell, and the other end of the sliding ring is pressed with one end of the retaining ring; the other end of the baffle ring is sleeved on the outer surface of the optical fiber; the aramid fiber is partially sleeved on the outer surface of the other end of the baffle ring, and the rest part of the aramid fiber is sleeved on the outer surface of the optical fiber; the optical cable outer sheath is sleeved on the outer surface of the aramid fiber; the crimping sleeve is sleeved on the outer surface of the other end of the retaining ring and the outer surface of the optical cable outer sheath.
In the detachable beam expanding type optical fiber contact element, one end of the ceramic sleeve is provided with an external chamfer, the other end of the ceramic sleeve is provided with an internal chamfer, and the internal chamfer is convenient for the installation of the G-lens.
In the detachable beam expanding type optical fiber contact piece, the ceramic sleeve is provided with a glue filling hole for filling ultraviolet glue and playing a role in observing the installation position of the inserting core.
In the detachable beam expanding type optical fiber contact element, the diameter of the G-lens is.mm, the pitch of the G-lens is.P, and two end faces of the G-lens are plated with antireflection films; one end of the G-lens is an inclination angle, a sharp angle part is subjected to chamfering treatment, and the G-lens and the ceramic sleeve are bonded by ND epoxy glue.
In the detachable beam expanding type optical fiber contact piece, the diameter of the ferrule is.mm, the ferrule is bonded with the optical fiber through ND glue, the end face oblique angle of one end of the ferrule is DEG, and the end faces of two ends of the ferrule are plated with antireflection films.
In the above detachable expanded beam type optical fiber contact member, the distance between the G-lens and the ferrule satisfies the following relationship:
wherein A is a focusing constant, r is the distance from one point in the G-lens to the central axis, and Delta is the relative refractive index difference between the center of the G-lens and the point in the G-lens.
In the detachable beam expanding type optical fiber contact element, the contact element shell comprises a body, a boss, a guide key, a limiting step and a thread structure; the boss, the limiting step and the thread structure are all arranged on the outer surface of the body; the outer surface of the boss is provided with a guide key; one end of the baffle ring is connected with the threaded structure.
In the detachable beam expanding type optical fiber contact element, the baffle ring comprises a second thread structure, a cylindrical part and a tail step; wherein the second thread structure is integrally connected with the cylindrical portion; the tail step is arranged on the outer surface of the cylindrical part; the second thread structure is connected with the thread structure.
In the above detachable expanded beam type optical fiber contact, the outer diameter d1 of the tail step and the inner diameter d2 of the crimp sleeve have the following constraint relationship:
in the detachable beam expanding type optical fiber contact piece, 353ND glue solution is injected into the tail part of the baffle ring, an internal gap is filled with the 353ND glue solution, and the optical fiber is bonded and fixed.
Compared with the prior art, the invention has the following beneficial effects:
(1) according to the invention, the ceramic sleeve, the G-lens, the ferrule and the optical fiber are made into the ferrule assembly to play a role in expanding optical signals, so that the influence of optical performance reduction caused by the fact that dust shields an optical communication area is reduced;
(2) according to the invention, through the design of the gap between the front end face of the ceramic sleeve and the end face of the lens, the lens is ensured not to be contacted when the two contact elements are butted, so that the phenomenon of friction damage of the end face of the lens caused by vibration is avoided;
(3) the invention solves the problem that the ultraviolet glue can not be quickly cured in the ceramic sleeve 1 because the ultraviolet can not penetrate through the ceramic sleeve by the design of the glue filling hole;
(4) in the contact assembly process, the guide key-glue pouring hole is used as a reference, so that the dispersion of all optical properties is small;
(5) according to the invention, the anti-rotation effect is achieved through the design of the guide key on the contact element shell, so that the contact element does not rotate in the connector in the circumferential direction, and the product stability is good;
(6) according to the invention, the reliable butt joint effect of the contact element can be still ensured when the optical cable is stressed by the contact element through the limiting step structure in the contact element shell;
(7) according to the invention, the effect of rapid assembly of the contact element is achieved through the threaded structure of the baffle ring and the contact element shell.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a schematic diagram of a removable expanded beam fiber optic contact provided by an embodiment of the present invention;
FIG. 2 is a ferrule assembly block diagram provided by an embodiment of the present invention;
FIG. 3 is a block diagram of a contact housing provided by an embodiment of the present invention;
FIG. 4 is a block ring structure provided in an embodiment of the present invention;
FIG. 5 is a schematic diagram of a contact assembly for mounting to a pin end of a connector according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a contact fitting into a receptacle end of a connector according to an embodiment of the present invention;
FIG. 7 is a schematic view of a connector provided by an embodiment of the present invention after mating;
figure 8 is another block diagram of a ferrule assembly provided by an embodiment of the present invention;
FIG. 9 is a schematic view of the outer circle of the tail step and the crimping sleeve provided by the embodiment of the invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Fig. 1 is a schematic structural diagram of a detachable bundle-extended optical fiber contact provided in an embodiment of the present invention. As shown in fig. 1, the removable expanded beam fiber optic contact includes: the optical cable connector comprises a ferrule assembly 12, a contact piece shell 4, a spring 5, a sliding ring 6, a baffle ring 7, a crimping sleeve 8, aramid fibers 10 and an optical cable outer sheath 11. Wherein the content of the first and second substances,
as shown in fig. 2, the ferrule assembly 12 includes a ferrule 1, a G-lens2, a ferrule 3, and an optical fiber 9; the G-lens2 is arranged in the inner cavity of the ceramic sleeve 1, and a gap is reserved between the flat end surface of the G-lens2 and the front end surface of the ceramic sleeve 1; one end of the ferrule 3 is embedded in the G-lens2, and the other end of the ferrule 3 is connected with one end of the optical fiber 9; the ferrule assembly 12 is connected with the contact element shell 4 in an interference press fit manner; the spring 5 and the slip ring 6 are sleeved on the outer surface of the contact element shell 4, one end of the spring 5 is pressed with the boss of the contact element shell 4, and the other end of the spring 5 is pressed with one end of the slip ring 6; one end of the retaining ring 7 is connected with one end of the contact element shell 4, and the other end of the sliding ring 6 is pressed with one end of the retaining ring 7; the other end of the baffle ring 7 is sleeved on the outer surface of the optical fiber 9; part of the aramid fiber 10 is sleeved on the outer surface of the other end of the baffle ring 7, and the rest part of the aramid fiber 10 is sleeved on the outer surface of the optical fiber 9; the optical cable outer sheath 11 is sleeved on the outer surface of the aramid fiber 10; the compression joint sleeve 8 is sleeved on the outer surface of the other end of the baffle ring 7 and the outer surface of the optical cable outer sheath 11.
Chamfers are designed inside and outside the ceramic sleeve 1, the external chamfers are convenient for the butt joint and guiding of the two contact pieces, and the internal chamfers are convenient for the installation of Glens 2; the ceramic sleeve 1 is provided with a glue filling hole for filling ultraviolet glue and playing a role in observing the installation position of the inserting core.
G-lens2 is used as a beam expanding element, the diameter of the device is 1.0mm, the pitch is 0.23P, antireflection films are plated on two end faces, one end of the lens is designed to be an 8-degree inclination angle for improving the return loss performance, and the sharp angle part is subjected to chamfering treatment. And G-lens2 is bonded with the ceramic sleeve 1 by 353ND epoxy glue, the sharp corner is aligned with one side of the glue filling hole and inserted to a set position during the installation, and the flat end face is positioned at the inner chamfer edge of the ceramic sleeve 1, so that a proper gap is left between the flat end face of the lens2 and the front end face of the ceramic sleeve 1.
The diameter of the ferrule 3 is 1.0mm, high-precision materials such as ceramics or glass can be adopted, the ferrule and the optical fiber 9 are integrally bonded through 353ND glue, then the end face of the ferrule is ground, the oblique angle of the end face is 8 degrees and is consistent with the angle of G-lens2, and the sharp angle part is chamfered. And (5) plating antireflection films on the end faces of the polished ferrule 3 and the optical fiber 9.
And adjusting the ceramic sleeve 1 bonded with the G-lens2, the processed ferrule 3 and the optical fiber 9 through a multi-axis adjusting platform, butting with a standard line to perform online test, and finding out the optimal coupling position of the end faces of the G-lens2 and the optical fiber 9. Ultraviolet glue is dispensed in the glue filling hole and is irradiated with ultraviolet light for curing, then 353ND glue is dispensed at the tail part of the ceramic sleeve for heating and curing, and the ceramic sleeve 1, the G-lens2, the ferrule 3 and the optical fiber 9 are manufactured into a ferrule assembly 12 as shown in figure 2.
As shown in fig. 8, the two 8 ° planes of G-lens2 and ferrule 3 end face should be parallel, and the distance should satisfy the following relationship:
where A is the focusing constant, r is the distance from a point in the lens to the central axis, and Δ is the relative refractive index difference between the center of the lens and the point in the lens (i.e., the point r from the central axis).
As shown in fig. 3, the contact housing 4 includes a body, a boss 404, a guide key 401, a limit step 402, and a thread structure 403; the boss 404, the limiting step 402 and the thread structure 403 are all arranged on the outer surface of the body; the outer surface of the boss 404 is provided with a guide key 401; one end of the retainer ring 7 is connected to the screw structure 403.
The ferrule assembly 12 is press-fit connected with the contact element housing 4 in an interference manner, a guide key 401 is designed on the contact element housing 4, and the direction of the guide key 401 is consistent with that of the ceramic sleeve glue filling hole 101 during press-fit. The contact housing is designed with a stop step 402 to ensure reliable mating of the contacts when the cable is stressed. The tail of the shell is designed with a thread structure 403 for connecting and fixing with the baffle ring 7.
The spring 5 is used for providing axial pressure when the contact pieces are butted, so that the contact pieces can keep a tight fit in a vibration environment.
The slip ring 6 can slide back and forth on the contact element, and one chamfered end of the slip ring faces the front end of the contact element to play a role in installation guiding. The rear end face of the slip ring 6 is clamped at the position of the fixed claw when the contact element is installed.
As shown in fig. 4, the retainer ring 7 includes a second thread structure 701, a cylindrical portion 703, and a tail step 702; wherein the second thread structure 701 is integrally connected with the cylindrical portion 703; a tail step 702 is provided on the outer surface of the cylindrical portion 703; the second thread 701 is connected to the thread 403.
One end of the retaining ring 7 is of a threaded structure 701, and the retaining ring is matched and screwed with the tail threads 403 of the contact element shell to perform a backward limiting function on the sliding ring. 353ND glue solution is injected from the tail part of the baffle ring 7, the inner gap is filled, and the optical fiber 9 is bonded and fixed. Adopting crimping pliers and hexagonal crimping block to compress a crimping sleeve 8, fixing aramid fiber 10 between a step 702 at the tail of the baffle ring and the crimping sleeve 8, wherein as shown in fig. 9, an excircle d1 of the step at the tail of the baffle ring and an inner diameter d2 of the crimping sleeve have a constraint relationship:
the aramid fiber can be more tightly pressed and fixed through the formula, and the condition that the contact cannot bear the preset tension due to over-tightness or over-looseness is avoided. The step design has chamfer 702 structure, prevents that aramid fiber 10 from cutting at the closed angle department and reducing contact member tensile strength.
The G-lens2 is used as a beam expanding element, the diameter of a device is 1.0mm, the pitch is 0.23P, antireflection films are plated on two end faces, in order to improve the return loss performance, one end of the lens2 is designed to be an 8-degree inclination angle, and the sharp corner is processed at a chamfer angle to prevent collision and damage. G-lens2 and the ceramic sleeve 1 are bonded by 353ND epoxy glue, and the sharp corner and the glue filling hole 101 are aligned in the same direction and inserted to a set position during installation. The flat end face of the lens is flush with the inner chamfer edge of the ceramic sleeve 1, and the distance between the flat end face of the lens and the end face of the front end face of the ceramic sleeve is about 0.2mm-0.3mm, so that a gap is ensured when the two contact pieces are butted, and the phenomena that the friction is generated when the end faces of the two lenses are contacted and fine particles damage the surface of the lens are prevented.
Chamfers are designed inside and outside the ceramic sleeve 1, and the chamfers of the inner hole are used for guiding when a lens and an insert core are installed; the external lead angle is used for butt joint guide when the pair of contact pieces are in butt joint and the coupling sleeve is inserted. The ceramic sleeve is provided with a glue filling hole 101 for filling ultraviolet glue and observing the insertion core loading position, and also has the function of positioning reference.
The diameter of the ferrule 3 is 1.0mm, a 0.125mm optical fiber hole is formed in the ferrule, and the ferrule and the optical fiber 9 are integrally bonded through 353ND glue and then the end face of the ferrule is ground. In order to improve the return loss performance, the oblique angle of the end face of the ferrule is 8 degrees and is consistent with the angle of the G-lens, and the chamfer of the sharp corner part is processed to prevent damage. And (5) plating antireflection coatings on the end faces of the polished ferrule 2 and the optical fiber 9.
And adjusting the ceramic sleeve after the G-lens is bonded, the processed ferrule and the optical fiber through a multi-axis adjusting platform, connecting the ceramic sleeve with a standard line through an SC coupling sleeve to perform online test, and determining the lowest loss point, namely finding the optimal coupling position of the G-lens and the optical fiber. When the ferrule 3 is installed, the sharp angle is kept in the opposite direction of the glue filling hole 101, and the glue filling hole 101 is observed and confirmed, so that the operation can reduce the adjusting time and improve the efficiency. Ultraviolet glue is dispensed in the glue filling hole 101, ultraviolet light is irradiated for curing, 353ND glue is dispensed at the tail of the ceramic sleeve for heating and curing, and the ceramic sleeve, the G-lens, the ferrule and the optical fiber are assembled into the ferrule assembly 12.
The ferrule assembly 12 is press-fit connected with the contact element housing 4 in an interference manner, a guide key 401 is designed on the contact element housing, and the direction of the guide key 401 is consistent with that of the ceramic sleeve glue filling hole 101 during press-fit. The contact housing is designed with a limit step 402 that prevents the slip ring from continuing to move forward when the cable is stressed, so that the contact can still ensure reliable docking. The spring 5, the slip ring 6 and the baffle ring 7 are sequentially arranged outside the shell, a thread structure is designed at the tail of the shell and used for being fixedly connected with the baffle ring, and thread glue is dispensed at the thread position for anti-loosening treatment.
The spring 5 is used for providing axial pressure when the contact piece is butted, so that the contact piece can be kept to be tightly attached under a vibration environment.
The slip ring 6 can slide back and forth on the contact piece, and is designed with a step for catching at the position of the holding claw when the contact piece is mounted.
One end of the retaining ring 7 is of a threaded structure, is matched and screwed with the tail part of the contact element shell 4 through threads, and has a function of limiting the sliding ring 6 after starting. 353ND glue liquid is injected from the tail part of the baffle ring, the inner gap is filled with the 353ND glue liquid, and the optical fibers are bonded and fixed. The step 702 at the tail of the baffle ring is used for being matched with the crimping sleeve 8 to compress the aramid fiber 10, so that friction is increased. The step design has the chamfer structure, prevents that aramid fiber from cutting at the closed angle department and reducing contact tensile strength. The distal end may be crimped to the cable jacket 11.
After the contact element is installed in the connector, the step of the front end face of the shell is propped against the bottom of the mounting hole, and the connector fixing claw is clamped at the rear end face of the slip ring. The guide keys 401 cooperate with guide grooves in the connector mounting holes to prevent the contacts from rotating relative to the connector, thereby improving optical performance stability. The contact element is of a neutral structure and can be arranged at the pin end and the jack end. The contacts are mounted at the pin end as shown in fig. 5 and at the socket end as shown in fig. 6. After the header housing is plugged, the contact elements are butted as shown in fig. 7, and the end faces of the two contact element ceramic sleeves are located near the center of the coupling sleeve.
According to the invention, the ceramic sleeve, the G-lens, the ferrule and the optical fiber are made into the ferrule assembly to play a role in expanding optical signals, so that the influence of optical performance reduction caused by the fact that dust shields an optical communication area is reduced; according to the invention, through the design of the gap between the front end face of the ceramic sleeve and the end face of the lens, the lens is ensured not to be contacted when the two contact elements are butted, so that the phenomenon of friction damage of the end face of the lens caused by vibration is avoided; the invention solves the problem that the ultraviolet glue can not be quickly cured in the ceramic sleeve 1 because the ultraviolet can not penetrate through the ceramic sleeve by the design of the glue filling hole; the assembly process of the contact element takes the guide key-glue pouring hole as a reference, and the discreteness of all optical properties is small; according to the invention, the anti-rotation effect is achieved through the design of the guide key on the contact element shell, so that the contact element does not rotate in the connector in the circumferential direction, and the product stability is good; according to the invention, the reliable butt joint effect of the contact element can be still ensured when the optical cable is stressed by the contact element through the limiting step structure in the contact element shell; according to the invention, the effect of rapid assembly of the contact element is achieved through the threaded structure of the baffle ring and the contact element shell.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make variations and modifications of the present invention without departing from the spirit and scope of the present invention by using the methods and technical contents disclosed above.
Claims (10)
1. A removable expanded beam optical fiber contact, comprising: the connector comprises a ferrule assembly (12), a contact piece shell (4), a spring (5), a sliding ring (6), a baffle ring (7), a crimping sleeve (8), aramid fibers (10) and an optical cable outer sheath (11); wherein the content of the first and second substances,
the ferrule assembly (12) comprises a ceramic sleeve (1), a G-lens (2), a ferrule (3) and an optical fiber (9);
the G-lens (2) is arranged in the inner cavity of the ceramic sleeve (1), and a gap is reserved between the flat end surface of the G-lens (2) and the front end surface of the ceramic sleeve (1);
one end of the ferrule (3) is embedded in the G-lens (2), and the other end of the ferrule (3) is connected with one end of the optical fiber (9);
the ferrule assembly (12) is in interference press-fit connection with the contact piece shell (4);
the spring (5) and the slip ring (6) are sleeved on the outer surface of the contact element shell (4), one end of the spring (5) is pressed with a boss of the contact element shell (4), and the other end of the spring (5) is pressed with one end of the slip ring (6);
one end of the retaining ring (7) is connected with one end of the contact element shell (4), and the other end of the sliding ring (6) is pressed with one end of the retaining ring (7); the other end of the baffle ring (7) is sleeved on the outer surface of the optical fiber (9);
part of the aramid fiber (10) is sleeved on the outer surface of the other end of the baffle ring (7), and the rest part of the aramid fiber (10) is sleeved on the outer surface of the optical fiber (9);
the outer cable sheath (11) is sleeved on the outer surface of the aramid fiber (10);
the crimping sleeve (8) is sleeved on the outer surface of the other end of the retaining ring (7) and the outer surface of the optical cable outer sheath (11).
2. The removable expanded beam fiber optic contact of claim 1, wherein: one end of the ceramic sleeve (1) is provided with an external chamfer, the other end of the ceramic sleeve (1) is provided with an internal chamfer, and the internal chamfer is convenient for installation of the G-lens (2).
3. The removable expanded beam fiber optic contact of claim 2, wherein: the ceramic sleeve (1) is provided with a glue filling hole (101) for injecting ultraviolet glue and playing a role in observing the installation position of the ferrule.
4. The removable expanded beam fiber optic contact of claim 3, wherein: the diameter of the G-lens (2) is 1.0mm, the pitch is 0.23P, and two end faces of the G-lens (2) are plated with antireflection films; one end of the G-lens (2) is at an 8-degree inclination angle, a sharp angle part is subjected to chamfering treatment, and the G-lens (2) and the ceramic sleeve (1) are bonded by 353ND epoxy glue.
5. The removable expanded beam fiber optic contact of claim 3, wherein: the diameter of the ferrule (3) is 1.0mm, the ferrule (3) and the optical fiber (9) are bonded through 353ND glue, the end face oblique angle of one end of the ferrule (3) is 8 degrees, and the end faces of two ends of the ferrule (3) are plated with antireflection films.
6. The removable expanded beam fiber optic contact of claim 1, wherein: the distance between the G-lens (2) and the ferrule (3) satisfies the following relation:
wherein A is a focusing constant, r is the distance from one point in the G-lens to the central axis, and Delta is the relative refractive index difference between the center of the G-lens and the point.
7. The removable expanded beam fiber optic contact of claim 1, wherein: the contact piece shell (4) comprises a body, a boss (404), a guide key (401), a limiting step (402) and a thread structure (403); wherein the content of the first and second substances,
the boss (404), the limiting step (402) and the thread structure (403) are arranged on the outer surface of the body;
the outer surface of the boss (404) is provided with a guide key (401);
one end of the baffle ring (7) is connected with the thread structure (403).
8. The removable expanded beam optical fiber contact of claim 7, wherein: the baffle ring (7) comprises a second thread structure (701), a cylindrical part (703) and a tail step (702); wherein the content of the first and second substances,
the second screw structure (701) is integrally connected to the cylindrical portion (703);
the tail step (702) is arranged on the outer surface of the cylindrical part (703);
the second thread arrangement (701) is connected to the thread arrangement (403).
9. The removable expanded beam fiber optic contact of claim 8, wherein: the outer circle diameter d1 of the tail step (702) and the inner diameter d2 of the crimping sleeve (8) have the following constraint relation:
10. the removable expanded beam fiber optic contact of claim 8, wherein: 353ND glue solution is injected into the tail part of the baffle ring (7), the inner gap is filled with the 353ND glue solution, and the optical fiber (9) is bonded and fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110335253.4A CN113219595B (en) | 2021-03-29 | 2021-03-29 | Detachable beam-expanding type optical fiber contact |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110335253.4A CN113219595B (en) | 2021-03-29 | 2021-03-29 | Detachable beam-expanding type optical fiber contact |
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| CN113219595A true CN113219595A (en) | 2021-08-06 |
| CN113219595B CN113219595B (en) | 2023-10-10 |
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| CN202110335253.4A Active CN113219595B (en) | 2021-03-29 | 2021-03-29 | Detachable beam-expanding type optical fiber contact |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| JP2003302557A (en) * | 2002-04-12 | 2003-10-24 | Namiki Precision Jewel Co Ltd | Ferrule integrated with optical axis corrective lens and its manufacturing method |
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| CN110286447A (en) * | 2019-07-05 | 2019-09-27 | 南京全信传输科技股份有限公司 | A kind of optical fiber beam expansion contact based on self-focusing lens |
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| US20030059177A1 (en) * | 2001-09-27 | 2003-03-27 | Fujitsu Limited | Receptacle type optical module and production method therefor |
| JP2003302557A (en) * | 2002-04-12 | 2003-10-24 | Namiki Precision Jewel Co Ltd | Ferrule integrated with optical axis corrective lens and its manufacturing method |
| TW201626019A (en) * | 2014-11-14 | 2016-07-16 | 住友電氣工業股份有限公司 | GRIN lens array, lens-mounted connector, and lens-mounted connector system |
| EP3133427A1 (en) * | 2015-08-21 | 2017-02-22 | TE Connectivity Corporation | Expanded beam connector with discrete alignment assembly |
| WO2018014209A1 (en) * | 2016-07-19 | 2018-01-25 | 乐矣天 | Optical fibre tunable filter |
| CN208636463U (en) * | 2018-08-22 | 2019-03-22 | 沈阳兴华航空电器有限责任公司 | A kind of extending type optical fiber contact |
| CN110286447A (en) * | 2019-07-05 | 2019-09-27 | 南京全信传输科技股份有限公司 | A kind of optical fiber beam expansion contact based on self-focusing lens |
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| CN113219595B (en) | 2023-10-10 |
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