阅读说明：本技术 一种双纤毛细管及其制备方法 (Double-fiber capillary tube and preparation method thereof ) 是由 赖明芳 王小阳 汤榕煊 陈曲 张可文 花少军 于 2021-09-15 设计创作，主要内容包括：本发明提供了一种双纤毛细管制备方法,包括以下步骤：两钼丝穿入单孔的玻璃母棒,放入拉丝炉加热熔化；所述玻璃母棒熔化后,夹具夹持所述玻璃母棒两端,所述夹具夹持着所述玻璃母棒沿远离钼丝的方向以不同速度运动；牵引熔化后的玻璃母棒至外径符合预设的参数,自然冷却后,切除成型的玻璃毛丝。将两钼丝穿入玻璃母棒,放入拉丝炉加热熔化,夹具夹持热熔的玻璃母棒进行牵引拉丝,调整玻璃毛丝的外径大小,以符合预设的参数,在自然冷却后,切除成型的玻璃毛丝,通过自然冷却,可减少产品的内应力,防止产品上产生裂痕等问题。本发明还提供了一种双纤毛细管,适用于上述的一种双纤毛细管制备方法。(The invention provides a preparation method of a double-fiber capillary tube, which comprises the following steps: two molybdenum wires penetrate into the single-hole glass mother rod and are placed into a wire drawing furnace to be heated and melted; after the glass mother rod is melted, clamping the two ends of the glass mother rod by a clamp, wherein the clamp clamps the glass mother rod to move at different speeds along the direction far away from the molybdenum wire; and drawing the melted glass mother rod until the outer diameter of the glass mother rod meets preset parameters, and cutting off the formed glass broken filaments after natural cooling. Two molybdenum wires penetrate into a glass mother rod, the glass mother rod is placed into a wire drawing furnace to be heated and melted, a clamp clamps the hot-melted glass mother rod to draw and draw the glass wool, the outer diameter of the glass wool is adjusted to meet preset parameters, the formed glass wool is cut after natural cooling, and through natural cooling, the internal stress of a product can be reduced, and the problems of cracks and the like on the product are prevented. The invention also provides a double-fiber capillary tube, which is suitable for the preparation method of the double-fiber capillary tube.)

1. A method for preparing a double-fiber capillary tube is characterized by comprising the following steps: the method comprises the following steps:

two molybdenum wires penetrate into the single-hole glass mother rod and are placed into a wire drawing furnace to be heated and melted;

after the glass mother rod is melted, clamping the two ends of the glass mother rod by a clamp, wherein the clamp clamps the glass mother rod to move at different speeds along the direction far away from the molybdenum wire;

and drawing the melted glass mother rod until the outer diameter of the glass mother rod meets preset parameters, and cutting off the formed glass broken filaments after natural cooling.

2. The method of manufacturing a twin-fiber capillary according to claim 1, wherein: before two molybdenum wires penetrate into the single-hole glass mother rod, the method further comprises the following steps:

before the molybdenum wire is used, soaking and cleaning the molybdenum wire by using a chemical reagent;

the chemical agent is any one of sulfuric acid and hydrochloric acid.

3. The method of manufacturing a twin-fiber capillary according to claim 1, wherein: the method comprises the following steps of (1) penetrating two molybdenum wires into a single-hole glass mother rod, and putting the glass mother rod into a wire drawing furnace for heating and melting:

the two molybdenum wires are combined and simultaneously penetrate into one end of the glass mother rod, and the two molybdenum wires and one end of the glass mother rod are placed along the vertical direction;

and putting one end of the glass mother rod, which is far away from the molybdenum wire, into a wire drawing furnace for heating and melting.

4. The method of manufacturing a twin-fiber capillary according to claim 1, wherein: after the glass mother rod is melted, the glass mother rod is clamped by a clamp at two positions, and the glass mother rod clamped by the clamp is pulled and stretched at different speeds along the direction far away from the molybdenum wire, and the method specifically comprises the following steps:

the glass mother rod moves downwards along the vertical direction after being melted, and the two clamps are clamped at the two ends of the glass mother rod;

the clamp close to the molybdenum wire feeds the glass mother rod into the wire drawing furnace at a slow speed, and the clamp far away from the molybdenum wire draws one end of the glass mother rod at a fast speed for wire drawing.

5. The method of manufacturing a twin-fiber capillary according to claim 1, wherein: the clamp close to the molybdenum wire sends the glass mother rod into the wire drawing furnace at a slow speed, and the clamp far away from the molybdenum wire draws and draws one end of the glass mother rod at a fast speed, including:

drawing and elongating the melted glass mother rod by a clamp far away from the molybdenum wire, so that the inner diameter of the glass mother rod is melted and then is attached to the molybdenum wire, and the melted glass mother rod falls down along the vertical direction;

clamping one end of the glass mother rod by a clamp far away from the molybdenum wire to perform wire drawing, and drawing the outer diameter to meet preset parameters;

and (3) finishing feeding the mother rod by using a clamp close to one end of the molybdenum wire, and cutting off the formed glass broken wire to obtain the glass broken wire.

6. The method of manufacturing a twin-fiber capillary according to claim 4, wherein: the moving speed of the clamp close to one end of the molybdenum wire is 8mm/min, and the moving speed of the clamp far away from one end of the molybdenum wire is 1500-2200 mm/min.

7. The method of manufacturing a twin-fiber capillary according to claim 5, wherein: and the glass wool is subjected to bubble blowing, grinding, polishing and cleaning in sequence to obtain the single-hole double-fiber capillary tube.

8. A twin capillary suitable for use in the method of manufacturing a twin capillary according to claims 1 to 7, wherein: comprises a capillary body;

an aperture is arranged in the capillary tube body, the aperture comprises a bell mouth pipeline and a straight pipeline, and the bell mouth pipeline is communicated with the straight pipeline;

the small-opening section of the bell-mouth pipeline is matched with the section of the straight pipeline;

the section of the straight pipeline is in a round corner rectangle shape.

9. A twin fiber capillary as defined in claim 8, wherein: the length of the long axis of the section of the straight pipeline is twice of the diameter of the molybdenum wire.

Technical Field

The invention relates to the field of optical fiber communication equipment, in particular to a double-fiber capillary tube and a preparation method thereof.

Background

The optical fiber capillary is used in high speed analog device, optical fiber collimator, tail fiber assembly, limited TV network, active and passive devices, DWFM and photoelectronic equipment interface. Both standard fiber capillary and non-standard fiber capillary have circular micropores, and the diameter of the micropores is too small to insert the optical fiber, so that the horn-mouth-shaped fiber capillary is provided.

The inner wall of the existing optical fiber capillary has strong stress, and the product is easy to crack, thereby having adverse effect on optical signal transmission.

Disclosure of Invention

The invention provides a double-fiber capillary and a preparation method thereof, aiming at overcoming the technical problems that the inner wall of the existing optical fiber capillary has strong stress, is easy to crack and has bad influence on optical signal transmission.

The invention provides a preparation method of a double-fiber capillary tube, which comprises the following steps: two molybdenum wires penetrate into the single-hole glass mother rod and are placed into a wire drawing furnace to be heated and melted; after the glass mother rod is melted, clamping the two ends of the glass mother rod by a clamp, wherein the clamp clamps the glass mother rod to move at different speeds along the direction far away from the molybdenum wire; and drawing the melted glass mother rod until the outer diameter of the glass mother rod meets preset parameters, and cutting off the formed glass broken filaments after natural cooling.

Preferably, the two molybdenum wires are penetrated into the single-hole glass mother rod and further comprise: before the molybdenum wire is used, soaking and cleaning the molybdenum wire by using a chemical reagent; the chemical agent is any one of sulfuric acid and hydrochloric acid.

Preferably, the step of passing the two molybdenum wires through a single-hole glass mother rod and putting the molybdenum wires into a wire drawing furnace for heating and melting comprises the following steps: the two molybdenum wires are combined and simultaneously penetrate into one end of the glass mother rod, and the two molybdenum wires and one end of the glass mother rod are placed along the vertical direction; and putting one end of the glass mother rod, which is far away from the molybdenum wire, into a wire drawing furnace for heating and melting.

Preferably, after the glass mother rod is melted, the glass mother rod is clamped by a clamp at two positions, and the clamp clamps the glass mother rod to draw and stretch the glass mother rod at different speeds along a direction away from the molybdenum wire, and the method specifically comprises the following steps: the glass mother rod moves downwards along the vertical direction after being melted, and the two clamps are clamped at the two ends of the glass mother rod; the clamp close to the molybdenum wire feeds the glass mother rod into the wire drawing furnace at a slow speed, and the clamp far away from the molybdenum wire draws one end of the glass mother rod at a fast speed for wire drawing.

Preferably, the clamp far away from the molybdenum wire draws and elongates the melted glass mother rod, the inner diameter of the glass mother rod is melted and then is attached to the molybdenum wire, and the melted glass mother rod falls down along the vertical direction; clamping one end of the glass mother rod by a clamp far away from the molybdenum wire to perform wire drawing, and drawing the outer diameter to meet preset parameters; and (3) finishing feeding the mother rod by using a clamp close to one end of the molybdenum wire, and cutting off the formed glass broken wire to obtain the glass broken wire.

Preferably, the moving speed of the clamp near one end of the molybdenum wire is 8mm/min, and the moving speed of the clamp far away from one end of the molybdenum wire is 1500-.

Preferably, the glass wool is processed by the processes of bubbling, grinding, polishing and cleaning in sequence to obtain the single-hole double-fiber capillary tube.

The second embodiment of the invention provides a double-fiber capillary tube, which is suitable for the preparation method of the double-fiber capillary tube, and comprises a capillary tube body; an aperture is arranged in the capillary tube body, the aperture comprises a bell mouth pipeline and a straight pipeline, and the bell mouth pipeline is communicated with the straight pipeline; the small-opening section of the bell-mouth pipeline is matched with the section of the straight pipeline; the section of the straight pipeline is in a round corner rectangle shape.

Preferably, the length of the long axis of the section of the straight pipeline is twice the diameter of the molybdenum wire.

Compared with the prior art, the double-fiber capillary tube and the preparation method thereof provided by the invention have the following advantages:

1. two molybdenum wires penetrate into a glass mother rod, the glass mother rod is placed into a wire drawing furnace to be heated and melted, a clamp clamps the hot-melted glass mother rod to draw and draw the glass wool, the outer diameter of the glass wool is adjusted to meet preset parameters, the formed glass wool is cut after natural cooling, and through natural cooling, the internal stress of a product can be reduced, and the problems of cracks and the like on the product are prevented.

2. The molybdenum wire is soaked and cleaned through the chemical reagent, an oxide layer and dirt on the surface of the molybdenum wire are cleaned, the phenomenon that the glass mother rod is stuck to the inner hole wall surface of the glass mother rod when the glass mother rod is hot-melted is avoided, the use of an affected product is prevented, and the quality of the product is improved.

3. Two molybdenum filament merges the one end that penetrates the female stick of glass, the molybdenum filament is placed along vertical direction with the female stick one end of glass, after the female stick hot melt of glass, through the effect of gravity, the female stick of glass of hot melt falls down along vertical direction, because two molybdenum filaments form an empty passageway in the female stick of glass of hot melt, in order to form follow-up optic fibre capillary's inner aperture, the female stick of glass of hot melt is to vertical direction landing under the effect of gravity, form a glass pipeline, make glass pipeline can become vertical state, make the inner aperture form standardizedly, the double fiber depth of parallelism of external diameter improves.

4. The molybdenum wire penetrates one end of the glass mother rod, one end of the glass mother rod penetrates through the molybdenum wire clamped by one clamp, the other end of the glass mother rod is clamped by the other clamp, the two clamps are respectively dragged, the glass mother rod is made to form a long-strip-shaped pipeline, the outer diameter of the pipeline is reduced under the dragging, the lower end of the pipeline is clamped and pulled, the parameter of the outer diameter is adjusted to meet the preset requirement, meanwhile, the two clamps are kept to be pulled in a parallel state, the deflection of the glass mother rod caused by the dragging is avoided, and the parallelism of the glass capillary tube is prevented from being influenced.

5. Through the female stick of hot melt glass, the laminating of the female stick of glass is on the molybdenum filament, in order to form the internal diameter of glass capillary, through the drawing wire drawing of the anchor clamps of keeping away from the molybdenum filament, be close to the anchor clamps pay-off of molybdenum filament, the female stick of glass after the hot melt pay-off, and the position of two anchor clamps is enough high, let the female stick of glass wire drawing through the relative motion of anchor clamps, form glass wool, the speed of formation with higher speed, the speed of processing treatment improves, after the external diameter of glass wool accords with the parameter, after natural cooling, cut off the glass wool, can reduce the internal stress of glass wool, avoid the glass wool to form the crack under the effect of internal stress, prevent to influence the authenticity of product signal transmission.

6. The two clamps have different moving speeds to form relative movement, so that the feeding and the drawing are carried out simultaneously in the processing process, and the processing speed is improved.

7. Glass broken filaments form a horn mouth through bubbling, burrs are removed through grinding, the inner diameter and the outer diameter are polished and smoothed to form a final single-hole double-fiber capillary tube, the single-hole double-fiber capillary tube is obtained through the glass broken filaments according to the processing flow, redundant materials of the glass broken filaments are removed, and the fineness of products is improved.

8. The capillary body sets up horn mouth pipeline and straight tube way, can insert the straight tube way with optic fibre through the horn mouth pipeline in, it is fixed with optic fibre through sealing to glue, the straight tube is said the cross-section and is the rounded rectangle, applicable in two optical fibers insert to and fix two optical fibers, the light signal of two optical fibers in the aperture transmits, and is in a straight tube way, two optical fibers can transmit light signal parallelly, reduce light signal's transmission error, improve the authenticity of transmission.

9. The length of the long axis of the section of the straight pipeline is twice of the diameter of the molybdenum wire, so that the double-optical-fiber optical fiber fixing device can be suitable for double-optical fiber insertion straight pipeline, and can increase double-optical fiber transmission stability.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit of the present invention are intended to be included within the scope of the present invention.

Drawings

FIG. 1 is a flow chart of a method for manufacturing a dual fiber capillary according to a first embodiment of the present invention;

FIG. 2 is a first detailed flow chart of a first method for manufacturing a dual-fiber capillary according to a first embodiment of the present invention;

FIG. 3 is a second detailed flow chart of a first embodiment of the present invention for a method of fabricating a dual-fiber capillary;

FIG. 4 is a third detailed flow chart of a first embodiment of the present invention for a method of fabricating a dual fiber capillary;

FIG. 5 is a schematic cross-sectional view of a twin capillary according to a second embodiment of the present invention;

fig. 6 is a side view of a twin-fiber capillary according to a second embodiment of the present invention.

Description of reference numerals:

1. a double-fiber capillary;

11. a flared conduit; 12. a straight pipeline;

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

The optical fiber capillary is used in high speed analog device, optical fiber collimator, tail fiber assembly, limited TV network, active and passive devices, DWFM and photoelectronic equipment interface. Both standard fiber capillary and non-standard fiber capillary have circular micropores, and the diameter of the micropores is too small to insert the optical fiber, so that the horn-mouth-shaped fiber capillary is provided.

The inventors found in the prior art that the following problems exist: the inner wall of the existing optical fiber capillary has strong stress, and the product is easy to crack, thereby having adverse effect on optical signal transmission.

Referring to fig. 1, a first embodiment of the present invention provides a method for manufacturing a dual-fiber capillary, including the following steps:

two molybdenum wires penetrate into the single-hole glass mother rod and are placed into a wire drawing furnace to be heated and melted;

after the glass mother rod is melted, clamping the two ends of the glass mother rod by a clamp, wherein the clamp clamps the glass mother rod to move at different speeds along the direction far away from the molybdenum wire;

and drawing the melted glass mother rod until the outer diameter of the glass mother rod meets preset parameters, and cutting off the formed glass broken filaments after natural cooling.

It will be appreciated that two molybdenum wires are threaded into a single hole glass parent rod and the molten glass parent rod is applied to the molybdenum wires to form a conduit for the insertion of an optical fiber.

It can be understood that after the glass mother rod is hot-melted, the two clamps clamp two ends of the glass mother rod, the two clamps move at different speeds respectively to form relative movement of the two clamps, so that the two clamps stretch the glass mother rod into glass wool.

Can understand, through the drawing of anchor clamps tensile, accord with the glass mother stick wire drawing to the external diameter predetermined parameter to be fit for current predetermined parameter, and then cut off it, the glass broken filament excision that will accord with the parameter, excise after the natural cooling, let the glass broken filament eliminate the internal stress, avoid the problem of glass broken filament because of the internal stress leads to the crack.

The glass mother rod is placed in a wire drawing furnace to be heated and melted to form a pipeline with the same cross section as the two molybdenum wires, so that the two molybdenum wires can be conveniently inserted into the subsequent double optical fibers, the hot-melted glass mother rod is clamped by a clamp to be drawn and drawn, the outer diameter of the glass wool is adjusted to accord with preset parameters, the formed glass wool is cut after natural cooling, the internal stress of the product can be reduced through natural cooling, and the problems of cracks and the like on the product are solved.

With reference to fig. 1, before the two molybdenum wires penetrate into the single-hole glass mother rod, the method further includes:

before use, the molybdenum wire is soaked and cleaned by a chemical reagent.

It can be understood that the molybdenum wire is soaked and cleaned through a chemical reagent, an oxide layer and dirt on the surface of the molybdenum wire are cleaned, the phenomenon that the glass mother rod is stuck to the inner hole wall surface of the glass mother rod when the glass mother rod is hot-melted is avoided, the use of a product is prevented from being influenced, and the quality of the product is improved.

Alternatively, the chemical agent is any one of sulfuric acid and hydrochloric acid.

Referring to fig. 2, the step of putting the molybdenum wires into the single-hole glass mother rod and heating and melting the molybdenum wires in the wire drawing furnace includes the following steps:

the two molybdenum wires are combined and simultaneously penetrate into one end of the glass mother rod, and the two molybdenum wires and one end of the glass mother rod are placed along the vertical direction;

and putting one end of the glass mother rod, which is far away from the molybdenum wire, into a wire drawing furnace for heating and melting.

It can be understood that, the one end of two molybdenum filament merges the mother stick of penetrating glass, the molybdenum filament is placed along vertical direction with mother stick one end of glass, after the mother stick hot melt of glass, through the effect of gravity, the mother stick of glass of hot melt falls down along vertical direction, because two molybdenum filaments form an empty passageway in the mother stick of glass of hot melt, in order to form follow-up optic fibre capillary's inner aperture, the mother stick of glass of hot melt is to vertical direction landing under the effect of gravity, form a glass pipeline, make glass pipeline can become vertical state, make the inner aperture form standardizedly, the two fine depth of parallelism of external diameter improve.

Referring to fig. 3, after the glass mother rod is melted, the glass mother rod is clamped at two positions by a clamp, and the glass mother rod clamped by the clamp is drawn and stretched at different speeds in a direction away from the molybdenum wire, which specifically includes the following steps:

the glass mother rod moves downwards along the vertical direction after being melted, and the two clamps are clamped at the two ends of the glass mother rod;

the clamp close to the molybdenum wire feeds the glass mother rod into the wire drawing furnace at a slow speed, and the clamp far away from the molybdenum wire draws one end of the glass mother rod at a fast speed for wire drawing.

It can be understood that, the molybdenum filament penetrates glass mother stick one end, an anchor clamps centre gripping molybdenum filament penetrates the one end of glass mother stick, another anchor clamps centre gripping glass mother stick other end, through the respective tractive of two anchor clamps, make glass mother stick form a long banding pipeline, let the external diameter of pipeline diminish under the tractive, centre gripping through lower extreme anchor clamps pulls, the parameter of adjustment external diameter is in order to be fit for predetermined requirement, and simultaneously, two anchor clamps keep pulling under the state of parallel, avoid leading to the skew of glass mother stick when pulling, prevent to influence the depth of parallelism of glass capillary.

Referring to fig. 4, the clamp close to the molybdenum wire feeds the glass mother rod into the wire drawing furnace at a slow speed, and the clamp far from the molybdenum wire draws and draws one end of the glass mother rod at a fast speed, which includes the following steps:

drawing and elongating the melted glass mother rod by a clamp far away from the molybdenum wire, attaching the melted glass mother rod to the molybdenum wire after the inner diameter of the glass mother rod is melted, and dropping the melted glass mother rod along the vertical direction;

clamping one end of the glass mother rod by a clamp far away from the molybdenum wire to perform wire drawing, and drawing the outer diameter to meet preset parameters;

and (3) finishing feeding the mother rod by using a clamp close to one end of the molybdenum wire, and cutting off the formed glass broken wire to obtain the glass broken wire.

It can be understood that through the female stick of hot melt glass, the female stick of glass laminating is on the molybdenum filament, in order to form the internal diameter of glass capillary, through the drawing wire drawing of the anchor clamps of keeping away from the molybdenum filament, be close to the anchor clamps pay-off of molybdenum filament, the female stick of glass after with the hot melt pay-off, and the position of two anchor clamps is enough high, let the female stick of glass wire drawing through the relative motion of anchor clamps, form the glass wool, the speed of formation with higher speed, improve the speed of processing, after the external diameter accord with the parameter at the glass wool, after natural cooling, cut off the glass wool, can reduce the internal stress of glass wool, avoid the glass wool to form the crack under the effect of internal stress, prevent to influence the authenticity of product signal transmission.

It can be understood that the clamp close to the molybdenum wire sets the glass mother rod to be higher than the ground as much as possible, the clamp far away from the molybdenum wire clamps one end of the glass mother rod far away from the molybdenum wire to be pulled towards the direction far away from the molybdenum wire, the glass mother rod is elongated, the wall thickness of the glass mother rod is reduced in the process of elongation, the wall thickness of the glass mother rod is gradually reduced in the process of gradual elongation, and the glass mother rod is pulled for enough time to be suitable for the preset outer diameter parameter. The clamp close to the molybdenum wire clamps the glass mother rod and sends the glass mother rod into the wire drawing furnace for feeding, so as to carry out hot melting, and the glass mother rod can be continuously prepared into the glass capillary tube.

In particular, the moving speed of the clamp near one end of the molybdenum wire is 8mm/min, and the moving speed of the clamp far away from one end of the molybdenum wire is 1500-.

Alternatively, after the formed glass wool is scratched on a cross section by a high-hardness object such as a diamond glass cutter, a grinding wheel, or the like, the formed glass wool may be broken based on the scratch.

Optionally, the formed glass wool can be cut by any method such as laser cutting and hot melting, and the cutting step of the formed glass wool can be completed by automatic equipment, so that the automation degree is improved.

Specifically, the two clamps have different movement speeds to form relative movement, so that the drawing and wire drawing are carried out while feeding in the machining process, and the machining speed is increased.

And the glass wool is subjected to bubble blowing, grinding, polishing and cleaning in sequence to obtain the single-hole double-fiber capillary tube.

Specifically, the glass wool forms a horn mouth through bubble blowing, burrs are removed through grinding, the inner diameter and the outer diameter are polished and smoothed to form a final single-hole double-fiber capillary tube, the single-hole double-fiber capillary tube is obtained through the glass wool according to a processing flow, redundant materials of the glass wool are removed, and the fineness of a product is improved.

Referring to fig. 5-6, a second embodiment of the present invention provides a dual-fiber capillary 1, which is suitable for the above-mentioned method for manufacturing the dual-fiber capillary 1, and comprises a capillary body; an aperture is arranged in the capillary tube body, the aperture comprises a bell mouth pipeline 11 and a straight pipeline 12, and the bell mouth pipeline 11 is communicated with the straight pipeline 12; the small-opening section of the bell-mouth pipeline 11 is matched with the section of the straight pipeline 12; the section of the straight pipeline 12 is a rounded rectangle.

Specifically, capillary body sets up horn mouth pipeline 11 and straight tube way 12, can insert straight tube way 12 with optic fibre through horn mouth pipeline 11 in, it is fixed with optic fibre through sealing glue, straight tube way 12 cross-section is the fillet rectangle, applicable in two optical fiber inserts, and fix two optical fibers, the light signal of two optical fibers in the aperture transmits, and be in a straight tube way 12, two optical fibers can transmit light signal parallelly, reduce light signal's transmission mistake, improve the authenticity of transmission.

In particular, the length of the long axis of the section of said straight conduit 12 is twice the diameter of the molybdenum wire. It can be understood that the length of the long axis of the cross section of the straight conduit 12 is twice the diameter of the molybdenum wire, which is suitable for inserting the double optical fibers into the straight conduit 12, and meanwhile, the stability of fixing the double optical fibers can be increased, and the stability of the transmission of the double optical fibers can be improved.

Specifically, the straight tube 12 has a cross section with a major axis length of (0.254. + -. 0.005) mm, a minor axis length of (0.128. + -. 0.005) mm, and a capillary body outer diameter length of (1.8. + -. 0.005) mm.

The working principle is as follows:

the technical problem is as follows: the inner wall of the existing optical fiber capillary has strong stress, and the product is easy to crack, thereby having adverse effect on optical signal transmission.

Straight pipeline 12, horn mouth pipeline 11 are provided with on the hair pipe body, and on optical fiber inserted straight pipeline 12's pipeline mouth through horn mouth pipeline 11, through the encapsulating on the horn mouth pipeline 11, fixed optical fiber to let the optical signal transmission in the optical fiber.

The straight pipeline 12 has a round rectangular section, is suitable for the simultaneous insertion of double optical fibers, enables optical signals in the double-fiber capillary 1 to be transmitted simultaneously, meanwhile, the straight pipe 12 is horizontally arranged, so that the dual-fiber capillary 1 can transmit dual-fiber signals in parallel, the transmission efficiency of the dual-fiber capillary 1 is improved, in addition, the long axis of the section of the straight pipe 12 is twice of the diameter of the molybdenum wire, the dual fibers can be directly inserted in parallel at the same time, and the size of the double optical fibers is matched with that of the double optical fibers, the straight pipeline 12 can be convenient for fixing the double optical fibers, the glue filling treatment is carried out at the position of the bell mouth pipeline 11, double optical fibers can be fixed, the stability of the fixation of the double optical fibers is increased, further, the section length of the straight pipeline 12 is matched with the double optical fibers, after the double optical fibers are inserted into the straight pipeline 12, the shaking of the optical fiber in the straight pipeline 12 can be reduced, the stability of the double optical fibers in the straight pipeline 12 is increased, and the stability of parallel transmission and transmission of optical signals in the double optical fibers is improved.

The small-mouth cross-section of horn mouth pipeline 11 with the straight tube is said 12 cross-sections and is matchd, and the double optical fiber of can being convenient for stretches into to straight tube 12 through horn mouth pipeline 11, and simultaneously, the small-mouth of horn mouth pipeline 11 can be fixed double optical fiber steadily, handles through the encapsulating, fixes double optical fiber in double optical fiber capillary side by side, and double optical fiber capillary is the haplopore simultaneously, and double optical fiber is for inserting simultaneously side by side, reduces the use to the capillary, reduces the cost of equipment.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit of the present invention are intended to be included within the scope of the present invention.