CN219456567U - High-precision optical fiber - Google Patents

Abstract

The utility model relates to a high-precision optical fiber, which comprises an optical cable; the high-precision optical fiber jumper has a simple structure and ingenious design, the offset direction position of the optical fiber cores in the ceramic ferrule is finely adjusted through the precision adjusting component, so that all the offset directions of the optical fiber cores in the ceramic ferrule are concentrated in the range of a preset angle, the alignment precision of the optical fiber cores in the ceramic ferrule is greatly improved compared with that of the common optical fiber jumper, and the signal transmission and test are more excellent; when the optical fiber links are connected, the two end faces of the optical cable are precisely butted through the two optical fiber connectors, so that the light energy output by the transmitting optical fiber can be coupled into the receiving optical fiber to the maximum extent, the influence on a system caused by the intervention of the light energy into the optical link is minimized, and the insertion loss is reduced.

Description

High-precision optical fiber

Technical Field

The utility model relates to the technical field of communication equipment, in particular to a high-precision optical fiber.

Background

The optical fiber is characterized in that connector plugs are arranged at two ends of the optical fiber and are used for realizing movable connection of an optical fiber link. The optical fiber is widely used for line dispatching in an optical fiber distribution frame and an optical cable cross connecting cabinet, is used for connection between different devices, and is also used for access networks, test instruments, scientific research tests and the like.

The insertion loss is the most important optical performance of the optical fiber, and when two optical fibers are connected, the accuracy of the butt joint of the inserting core determines the index of the insertion loss, and when the optical fiber is connected, as the accuracy adjusting component for adjusting the offset direction position of the optical fiber core is not provided, as shown in figure 1, the multiple optical fiber cores which are not adjusted in the core insert are distributed and dispersed, so that the connection of the two optical fiber hops is not tight enough, the alignment degree is not high, the performance of the whole optical fiber link can be influenced, and the insertion loss of the common optical fiber hops is difficult to meet the requirements in some high-precision connection requirements and high-precision test systems.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a high-precision optical fiber for overcoming the defects in the prior art.

The technical scheme adopted for solving the technical problems is as follows: the high-precision optical fiber comprises an optical cable, wherein two ends of the optical cable are respectively connected with an optical fiber connector; the optical fiber connector comprises an optical fiber tail sheath, a ceramic ferrule, an inner frame sleeve and an outer frame sleeve, wherein the optical fiber tail sheath is fixedly connected with the optical cable; the optical fiber tail sheath is fixedly connected with one end of the ceramic ferrule through a stopper; the inner frame sleeve is also internally provided with a light channel arranged along the length direction of the inner frame sleeve; at least a portion of the ferrule is inserted into the optical channel; the optical fiber connector is internally provided with an accuracy adjusting component for finely adjusting the position of the optical fiber core in the ceramic ferrule in the offset direction;

the high-precision optical fiber provided by the utility model comprises an installation base sleeved on the ceramic ferrule, and a plurality of limit bosses circumferentially and uniformly distributed on the circumference of the inner wall of the optical channel; the mounting base can drive the ceramic ferrule to rotate in the optical channel; the mounting base is also provided with a plurality of limit clamping grooves which are in one-to-one correspondence with the limit bosses and are spliced with the limit bosses so as to fix the ceramic ferrule in the optical channel;

the high-precision optical fiber disclosed by the utility model has the advantages that the width of the limiting boss is not larger than the width of the limiting clamping groove;

the high-precision optical fiber provided by the utility model is characterized in that a single digital number is arranged in each limiting clamping groove, wherein the digital number can be any one of 1, 2, 3 and 4.

The high-precision optical fiber provided by the utility model is characterized in that a positioning mark parallel to the optical channel is further arranged on the outer side surface of the inner frame sleeve along the length direction of the outer side surface of the inner frame sleeve; a positioning key is arranged on the outer side surface of the outer frame sleeve; when assembled in place, the positioning mark and the positioning key are positioned on the same side of the optical fiber connector;

the high-precision optical fiber jumper disclosed by the utility model, wherein when the high-precision optical fiber jumper is adjusted in place, the position of the optical fiber core in the offset direction in the ceramic ferrule is in the same direction as the positioning mark and the positioning key;

the high-precision optical fiber is characterized in that a dustproof cap for protecting the ceramic ferrule is further arranged at one end head of the outer frame sleeve.

The utility model has the beneficial effects that: the high-precision optical fiber jumper has a simple structure and ingenious design, the offset direction position of the optical fiber cores in the ceramic ferrule is finely adjusted through the precision adjusting component, so that all the offset directions of the optical fiber cores in the ceramic ferrule are concentrated in the range of a preset angle, the alignment precision of the optical fiber cores in the ceramic ferrule is greatly improved compared with that of the common optical fiber jumper, and the signal transmission and test are more excellent; when the optical fiber links are connected, the two end faces of the optical cable are precisely butted through the two optical fiber connectors, so that the light energy output by the transmitting optical fiber can be coupled into the receiving optical fiber to the maximum extent, the influence on a system caused by the intervention of the light energy into the optical link is minimized, and the insertion loss is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the present utility model will be further described with reference to the accompanying drawings and embodiments, in which the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained by those skilled in the art without inventive effort:

FIG. 1 is a schematic diagram of a distribution of unconditioned cores of a plurality of optical fibers in the background art

FIG. 2 is a schematic diagram of a high-precision optical fiber according to a preferred embodiment of the present utility model;

FIG. 3 is an exploded view of a fiber optic connector according to a preferred embodiment of the present utility model;

FIG. 4 is a schematic view of the inner casing according to the preferred embodiment of the present utility model;

FIG. 5 is a schematic view of a ferrule and mounting base according to a preferred embodiment of the present utility model;

FIG. 6 is a schematic view of an inner ferrule and ferrule assembly according to a preferred embodiment of the present utility model;

FIG. 7 is a schematic diagram showing the distribution of cores of a plurality of optical fibers after aligning according to a preferred embodiment of the present utility model.

Detailed Description

The terms "first," "second," "third," and "fourth" and the like in the description and in the claims and drawings are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the utility model. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

"plurality" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.

Moreover, the terms "upper, lower, front, rear, left, right, upper end, lower end, longitudinal" and the like that represent orientations are referred to with reference to the attitude position of the apparatus or device described in this scheme when in normal use.

In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the following description will be made in detail with reference to the technical solutions in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by a person skilled in the art without any inventive effort, are intended to be within the scope of the present utility model, based on the embodiments of the present utility model.

The high-precision optical fiber in the preferred embodiment of the present utility model, as shown in fig. 2-6, comprises an optical cable 100, wherein two ends of the optical cable 100 are respectively connected with an optical fiber connector 200; the optical fiber connector 200 comprises an optical fiber tail sheath 201 fixedly connected with the optical cable 100, a ceramic ferrule 202, an inner frame sleeve 203 and an outer frame sleeve 204 sleeved outside the inner frame sleeve 203; the optical cable can be better protected by the optical fiber tail sheath, the lateral pressure resistance and the dampproof sealing performance of the optical cable are further improved, and the connection is more stable; the optical fiber tail sheath 201 is fixedly connected with one end of the ceramic ferrule 202 through a stopper 205; the inner frame 203 is also provided with a light channel 2031 arranged along the length direction; at least a portion of the ferrule 202 is inserted into the optical channel 2031; an accuracy adjusting component for finely adjusting the offset direction position of the optical fiber core in the ferrule 202 is also provided in the optical fiber connector 200.

The high-precision optical fiber jumper has a simple structure and ingenious design, the offset direction position of the optical fiber cores in the ceramic ferrule is finely adjusted through the precision adjusting component, so that all the offset directions of the optical fiber cores in the ceramic ferrule are concentrated in the range of a preset angle, the alignment precision of the optical fiber cores in the ceramic ferrule is greatly improved compared with that of the common optical fiber jumper, and the signal transmission and test are more excellent; when the optical fiber links are connected, the two end faces of the optical cable are precisely butted through the two optical fiber connectors, so that the light energy output by the transmitting optical fiber can be coupled into the receiving optical fiber to the maximum extent, the influence on a system caused by the intervention of the light energy into the optical link is minimized, and the insertion loss is reduced.

Preferably, the precision adjusting assembly comprises a mounting base 206 sleeved on the ferrule 202, and a plurality of limit bosses 207 circumferentially uniformly distributed on the circumference of the inner wall of the optical channel 2031; the mounting base 206 may drive the ferrule 202 to rotate within the optical channel 2031; the mounting base 206 is also provided with a plurality of limit clamping grooves 208 which are in one-to-one correspondence with the limit bosses 207 and are spliced with the limit bosses 207, and the width of the limit bosses 207 is not larger than the width of the limit clamping grooves 208; to secure the ferrule 202 within the optical channel 2031; the limiting clamping grooves are uniformly distributed on the outer circumference of the mounting base; when the installation base drives the ceramic lock pin to rotate to a preset angle, the ceramic lock pin is inserted into the inner frame sleeve to enable the limit clamping groove to be tightly matched with the limit boss, and at the moment, the ceramic lock pin is fixed and cannot rotate any more, so that the ceramic lock pin is fixed on the inner frame sleeve.

In this embodiment, 6 spacing bosses and spacing slots may be provided, the spacing angles between two adjacent spacing bosses and between two adjacent spacing slots are both 60 °, each spacing slot can be in mating connection with any one of the spacing bosses, so the mounting base can drive the ferrule to rotate 6 azimuth clockwise or 6 azimuth anticlockwise in the inner frame sleeve, thereby adjusting the position of the biased direction of the optical fiber core in the ferrule, so as to achieve fine adjustment of the position of the offset direction of the optical fiber core in the ferrule 202; in other embodiments, the number of the limiting bosses and the limiting slots may be equal to 4 or 8 or more, and the specific equal number is not limited, which belongs to the protection scope of the present utility model, and the higher the equal number of the limiting bosses and the limiting slots, the smaller the offset angle of the optical fiber core in the ferrule 202, the higher the precision, and as shown in fig. 7, the optical fiber cores after core adjustment are distributed in the range of the preset angle in a concentrated manner, so that the alignment precision of the optical fiber cores in the ferrule is greatly improved compared with that of the common optical fiber hops.

Preferably, a single number is provided in each limit slot 208, where the number is any one of 1, 2, 3, and 4. When accuracy adjustment is carried out, white light is introduced into the other end of the optical cable, a concentricity testing instrument is used for measuring the direction of the optical fiber core deviated in the ceramic ferrule, and the digital number on the limit clamping groove corresponding to the direction or the nearest limit clamping groove is recorded, so that the follow-up operation is facilitated; it should be noted that the concentricity testing apparatus is in the prior art, and will not be described herein.

Preferably, an outer side surface of the inner frame 203 is further provided with a positioning mark 2032 parallel to the light channel 2031 along the length direction thereof; a positioning key 2041 is provided on an outer surface of the outer frame 204; when assembled in place, positioning mark 2032 and positioning key 2041 are on the same side of fiber optic connector 200; as shown in fig. 7, when the optical fiber is adjusted in place, the position of the optical fiber core in the direction shifted in the ferrule 202 is in the same direction as the positioning mark 2032 and the positioning key 2041;

when the ceramic lock pin is installed into the inner frame sleeve, the lock pin is rotated firstly, so that the limit clamping groove of the number recorded in the front is aligned with one limit boss corresponding to the positioning mark in the inner frame sleeve, the ceramic lock pin is installed into the bottom of the inner frame sleeve, the limit clamping groove is tightly matched with the limit boss, and the ceramic lock pin is fixed and cannot rotate any more. One surface of the limit mark of the inner frame sleeve is aligned with one surface of the positioning key of the outer frame sleeve. Thus, the direction of the optical fiber core in the ceramic ferrule, the positioning mark of the inner frame sleeve and the positioning key of the outer frame sleeve are positioned in the same direction, so that all the optical fiber cores are offset in the same direction, and the precision is higher

Preferably, one end of the outer frame 204 is also provided with a dust cap 205; specifically, the dust cap is installed at the head of ceramic lock pin for protecting ceramic lock pin terminal surface.

It will be understood that modifications and variations will be apparent to those skilled in the art from the foregoing description, and it is intended that all such modifications and variations be included within the scope of the following claims.

Claims (7)

1. The high-precision optical fiber comprises an optical cable, and is characterized in that two ends of the optical cable are respectively connected with an optical fiber connector; the optical fiber connector comprises an optical fiber tail sheath, a ceramic ferrule, an inner frame sleeve and an outer frame sleeve, wherein the optical fiber tail sheath is fixedly connected with the optical cable; the optical fiber tail sheath is fixedly connected with one end of the ceramic ferrule through a stopper; the inner frame sleeve is also internally provided with a light channel arranged along the length direction of the inner frame sleeve; at least a portion of the ferrule is inserted into the optical channel; and an accuracy adjusting component for finely adjusting the position of the offset direction of the optical fiber core in the ceramic ferrule is further arranged in the optical fiber connector.

2. The high-precision optical fiber according to claim 1, wherein the precision adjusting assembly comprises a mounting base sleeved on the ceramic ferrule and a plurality of limiting bosses circumferentially and uniformly distributed on the circumference of the inner wall of the optical channel; the mounting base can drive the ceramic ferrule to rotate in the optical channel; and the mounting base is also provided with a plurality of limiting clamping grooves which are in one-to-one correspondence with the limiting bosses and are spliced with the limiting bosses so as to fix the ceramic ferrule in the optical channel.

3. The high-precision optical fiber according to claim 2, wherein the width of the limit boss is not greater than the width of the limit slot.

4. The high-precision optical fiber according to claim 3, wherein a single digital number is arranged in each limit clamping groove, and the digital number can be any one of 1, 2, 3, 4 and N, wherein N is a positive integer.

5. The high-precision optical fiber according to claim 1, wherein an outer side surface of the inner frame sleeve is further provided with a positioning mark parallel to the optical channel along a length direction thereof; a positioning key is arranged on the outer side surface of the outer frame sleeve; when assembled in place, the positioning mark and the positioning key are both positioned on the same side of the optical fiber connector.

6. The high-precision optical fiber according to claim 5, wherein the position of the optical fiber core in the direction shifted in the ferrule is in the same direction as the positioning mark and the positioning key when the optical fiber is adjusted in place.

7. The high-precision optical fiber according to any one of claims 1 to 6, wherein an end of the outer frame sleeve is further provided with a dust cap for protecting the ferrule.