CN113998904B - H-shaped optical fiber manufacturing method based on hydrofluoric acid corrosion technology - Google Patents
H-shaped optical fiber manufacturing method based on hydrofluoric acid corrosion technology Download PDFInfo
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- C03—GLASS; MINERAL OR SLAG WOOL
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Abstract
The invention relates to an optical fiber manufacturing device, in particular to an I-shaped optical fiber manufacturing device based on a hydrofluoric acid corrosion technology, which comprises an objective table, a liquid tank, a moving track, a sliding block, a spring, an optical fiber clamp, an optical fiber pressing block, a rubber sleeve and a checking clamp. The I-shaped optical fiber manufacturing device utilizes the rubber sleeve to fix the optical fiber on the optical fiber pressing block, then the pressing block is placed in the liquid tank, and hydrofluoric acid and deionized water are injected into the liquid tank to respectively realize the functions of corroding the optical fiber and cleaning the optical fiber. The H-shaped optical fiber manufacturing device is based on hydrofluoric acid corrosion technology, can effectively control parallelism and processing depth of two surfaces of the H-shaped optical fiber, and is suitable for traditional single-mode optical fibers and special optical fibers, and fiber core types of the optical fibers include, but are not limited to, round fiber core optical fibers and square fiber core optical fibers. The device is easy to manufacture, and the machined I-shaped optical fiber has good surface symmetry, high precision and extremely high controllability on machining size.
Description
Technical Field
The invention belongs to the field of manufacturing of micro-structure optical fibers, in particular to the field of manufacturing of micro-fiber devices and hybrid structure optical fiber devices in photon integration and optical fiber communication systems.
Background
The optical fiber communication technology is a research field emphasized by the national schema of the medium and long term development planning, and the traditional optical fiber and the derivative structure thereof have important roles in the optical integration field by virtue of the advantages of ultra-large communication capacity, low loss, low cost and the like, and become an important support for the development of the 21 st century information industry. In the conventional optical fiber, the optical field is strictly limited to be transmitted in the fiber core, and the signal transmitted in the optical fiber can hardly radiate out of the optical fiber because the external signal can not interfere with the signal transmitted in the optical fiber, so that the electromagnetic compatibility and noise immunity of the optical fiber are excellent.
The sustainable development of the contemporary optical fiber communication technology is widely dependent on various novel optical fiber devices, such as modulators, photoelectric detectors, ultrafast lasers and the like based on optical fiber platforms, which destroy the transmission stability of the traditional optical fibers to a certain extent, and realize the functionalization of the composite structure of the modification material and the optical fibers through evanescent wave coupling. In such devices, the two most common fiber platforms are tapered micro-nano fibers and D-type fibers, and the manufacturing schemes for the two fiber platforms are also endless, such as a fusion tapering method, a chemical etching method, a laser etching method, a flat-type side polishing method, a suspension type side polishing method and the like. Along with the continuous pursuit of high coupling coefficient and high sensitivity of various optical fiber composite devices, the existing two optical fiber platforms, namely the conical micro-nano optical fiber and the D-type optical fiber, can not meet the composite requirement of novel functional materials, so that the manufacture of a novel optical fiber element platform capable of leaking stronger evanescent waves is important for the development of the future optical communication field.
The I-shaped optical fiber is characterized in that a part of cladding layers at two sides of a cylindrical structure of the optical fiber is removed, and the two sides of the removed cladding layers meet the parallel condition as much as possible, so that the cross section of the optical fiber forms a Chinese character I. In this way, the optical signals transmitted in the I-shaped optical fiber platform are symmetrically leaked out from two sides of the optical fiber in the form of evanescent waves, and compared with the D-shaped optical fiber platform, the optical fiber platform has a higher coupling coefficient with the functional material; compared with the cylindrical structure of the conical micro-nano optical fiber platform, the I-shaped optical fiber has two complete planes, and great convenience is provided for realizing the combination of functional materials and the optical fiber platform. In the traditional optical fiber platform manufacturing scheme, only a cylindrical surface optical fiber sample can be obtained by a fusion tapering method, and a flat surface cannot be processed on the optical fiber; the interference of gravity factors cannot be eliminated by the laser etching method, when a plane structure is manufactured on the optical fiber, the plane edge can be asymmetric, and the possibility of manufacturing an I-shaped surface on the optical fiber by the laser etching method is almost zero; the flat-type side polishing method and the suspension type side polishing method can generate a plurality of microcracks when processing a plane on the optical fiber, the common D-shaped optical fiber is formed by processing one plane, the service life of the optical fiber can be prolonged after the optical fiber is soaked and polished by liquid medicine, the optical fiber is prevented from being broken, and the continuous polishing processing on the D-shaped optical fiber is unrealistic under the condition that the microcracks can not be completely eliminated. In comparison, the chemical etching method has unique advantages in the aspect of manufacturing the I-shaped optical fiber, and the method can process a plane on the optical fiber and can avoid the interference of gravity factors and microcracks on an optical fiber sample.
In conclusion, the efficient combination of the functional material and the novel optical fiber platform has important scientific significance and practical value for the further development of the current optical fiber communication system. The prior art can realize the manufacture of the traditional optical fiber platform, but can not meet the manufacture requirement of the I-shaped optical fiber platform. The patent proposes a manufacturing method of an I-shaped optical fiber platform, which is based on hydrofluoric acid corrosion technology and is suitable for traditional single-mode optical fibers and special optical fibers, and the types of fiber cores of the optical fibers include, but are not limited to, round fiber core optical fibers and square fiber core optical fibers. The I-shaped optical fiber processed by the method has good surface symmetry, high precision and extremely high controllability on processing size.
Disclosure of Invention
The invention fills the blank of the I-shaped optical fiber platform in the aspect of manufacturing technology. Through reasonable scheme design, the invention provides the manufacturing method of the I-shaped optical fiber, which can effectively control the parallelism and the processing depth of the two surfaces of the I-shaped optical fiber, and the manufacturing process is compatible with the traditional single-mode optical fiber and the special optical fiber.
The basic principle of the invention is as follows: hydrofluoric acid is an aqueous solution of hydrogen fluoride gas, is corrosive, and can strongly corrode metals including gold and silver, common glass and various objects containing silicon. The main component of the traditional single-mode fiber and special fiber cladding is silicon dioxide, which can be severely corroded by hydrofluoric acid, so that the surface morphology of the fiber can be deeply processed by reasonably utilizing the hydrofluoric acid. The invention provides an I-shaped optical fiber manufacturing method based on a hydrofluoric acid corrosion technology. The optical fiber fixing device is characterized in that a liquid groove is fixed in the middle of the objective table, moving tracks are formed by processing parts of the objective table on two sides of the liquid groove, four sliding blocks can freely slide in a limited range of the moving tracks, part of the sliding blocks are connected through springs, and an optical fiber clamp is arranged on each sliding block to fix an optical fiber.
According to the manufacturing method of the I-shaped optical fiber, the optical fiber is fixed on the optical fiber pressing block through the rubber sleeve, the pressing block is placed in the liquid tank, hydrofluoric acid and deionized water are injected into the liquid tank to respectively realize the functions of corroding the optical fiber and cleaning the optical fiber, and the corrosion processing of one side face of the optical fiber is completed. The rubber sleeve is provided with a buckle on one side, the annular rubber sleeve can be changed into a strip shape after the buckle is released, after one side surface of the optical fiber is processed, the rubber sleeve on the current optical fiber pressing block is changed into a strip shape by utilizing the checking fixture and is transferred to the other optical fiber pressing block, and then the previous corrosion processing flow is repeated, so that the corrosion processing of the other side surface of the I-shaped optical fiber is realized, and the I-shaped optical fiber with two nearly parallel side surfaces is obtained. The optical fiber clamp is arranged on the sliding block, the optical fibers are fixed by the optical fiber clamp, and the optical fibers can be stretched and straightened by utilizing the elastic potential energy of the spring and the moving capability of the sliding block according to the fixed sequence, so that the repeatability and the manufacturing precision of the manufacturing process of the I-shaped optical fibers are improved.
The specific physical implementation mode of the invention is as follows: in the manufacturing method of the I-shaped optical fiber based on the hydrofluoric acid corrosion technology, a moving track is processed on an objective table, the moving track is distributed on two sides of a liquid tank, a sliding block can freely slide within a limited range of the moving track, a clamp for fixing the optical fiber is arranged on the sliding block, and part of the sliding blocks are connected through springs. Firstly, removing a coating layer from a region to be processed of an optical fiber, embedding the optical fiber into lead powder for a period of time, taking out the optical fiber, then placing the optical fiber wrapped with the lead powder at the approximate position of the middle part of an optical fiber pressing block, adding customized rubber sleeves on two sides of the optical fiber pressing block and extruding the optical fiber in the direction of the optical fiber, confirming that the rubber sleeves are extruded to an exact position by using a calibration fixture, firmly fixing the optical fiber in a gap of the rubber sleeves at the moment, and finally dipping absolute ethyl alcohol by using a soft brush to remove the lead powder exposed in the air on the surface of the current optical fiber. Placing one surface of the optical fiber pressing block, which is well fixed with the optical fiber, in a liquid tank downwards, then extruding two sliding blocks closest to the liquid tank towards the direction of the liquid tank, so that the distances between the two sliding blocks and the edge of the liquid tank are approximately the same, fixing the tail fiber part of the optical fiber to be processed by using an optical fiber clamp, loosening the sliding blocks, and naturally stretching the optical fiber outside the liquid tank by using the elastic potential energy of a spring; then, the remaining two sliding blocks are extruded towards the direction of the liquid groove, the remaining tail fiber is fixed by using the optical fiber clamp, and the remaining part of the optical fiber tail fiber is stretched naturally and straightened by using the elastic potential energy of the spring. And (3) injecting hydrofluoric acid into the liquid tank, so that the liquid level of the hydrofluoric acid is higher than the bottom surface of the pressing block, and finishing the corrosion processing of one side surface of the optical fiber after a period of time.
After the corrosion processing of one side surface of the optical fiber is finished, pumping out hydrofluoric acid in the liquid tank by using a syringe, then injecting deionized water, cleaning residual hydrofluoric acid on the surface of the corroded optical fiber, standing a sample for 5 minutes after injecting deionized water, and then pumping out deionized water waste liquid and injecting new deionized water. And after the processes of changing water and standing the sample are repeated for a plurality of times, the residual waste liquid in the liquid tank is pumped out, so that the corroded side surface of the optical fiber is naturally air-dried. Opening two nearest optical fiber clamps on two sides of the liquid tank, releasing stress born by optical fiber tail fibers near the optical fiber pressing block, taking out the optical fiber pressing block currently wrapping the rubber sleeve, placing the pressing block into the calibrating clamp, placing a new optical fiber pressing block into the calibrating clamp, placing the new optical fiber pressing block under the optical fiber pressing block wrapping the rubber sleeve, and tightly attaching to the rubber sleeve. And unlocking the buckle on the rubber sleeve, so that the annular rubber sleeve is changed into a strip shape and naturally sags, and the rubber sleeve is buckled on a new optical fiber pressing block below to finish the transfer of the rubber sleeve to the new optical fiber pressing block.
And opening the rest optical fiber clamps, taking out the whole optical fiber sample, enabling the surface of the fixed optical fiber on the new optical fiber pressing block to face downwards, and dipping absolute ethyl alcohol by using a soft pen brush to remove lead powder exposed in the air of the current optical fiber. Placing a new optical fiber pressing block in a liquid tank, then extruding two sliding blocks closest to the liquid tank towards the direction of the liquid tank, enabling the distances between the two sliding blocks and the edge of the liquid tank to be approximately the same, fixing a tail fiber part of an optical fiber to be processed by using an optical fiber clamp, loosening the sliding blocks, and naturally stretching the optical fiber outside the liquid tank by using the elastic potential energy of a spring; the remaining two sliding blocks are extruded towards the direction of the liquid groove, the remaining tail fiber is fixed by using the optical fiber clamp, and the remaining part of the optical fiber tail fiber is stretched naturally and straightened by using the elastic potential energy of the spring. And (3) injecting hydrofluoric acid into the liquid tank, so that the liquid level of the hydrofluoric acid is higher than the bottom surface of the pressing block, and finishing the corrosion processing of the second side surface of the optical fiber after waiting for a period of time. After the corrosion processing is finished, pumping out hydrofluoric acid in the liquid tank by using a syringe, then injecting deionized water, cleaning residual hydrofluoric acid on the surface of the corroded optical fiber, standing a sample for 5 minutes after injecting the deionized water, and then pumping out deionized water waste liquid and injecting new deionized water. And after the processes of changing water and standing the sample are repeated for a plurality of times, extracting the residual waste liquid in the liquid tank, and naturally air-drying the side surface of the current optical fiber which is corroded and processed. Opening two nearest optical fiber clamps on two sides of the liquid tank, releasing stress borne by optical fiber tail fibers near the optical fiber pressing block, opening the rest optical fiber clamps, taking out the optical fiber pressing block, opening the buckle of the rubber sleeve, taking out the optical fiber sample, and obtaining the I-shaped optical fibers with two nearly strictly parallel sides.
The invention has the beneficial effects that: the manufacturing method of the I-shaped optical fiber by means of the hydrofluoric acid corrosion technology is provided, great convenience is provided for widening the application field of various novel optical fiber devices and realizing the combination of functional materials and the optical fiber platform, the blank of the I-shaped optical fiber platform in the manufacturing process is made up, and the manufacturing method has important value for designing and manufacturing various composite devices based on the I-shaped optical fiber platform. The main advantages are as follows:
(1) Compared with the traditional optical fiber platform processing method, the H-shaped optical fiber manufacturing method based on the hydrofluoric acid corrosion technology uses hydrofluoric acid to carry out corrosion processing on the surface of the optical fiber, so that the influence of gravity factors and microcracks on an optical fiber sample is avoided;
(2) The H-shaped optical fiber manufacturing method based on the hydrofluoric acid corrosion technology ensures the flatness and symmetry of the H-shaped surface of the optical fiber and improves the repeatability of the H-shaped optical fiber processing;
(3) The manufacturing method of the H-shaped optical fiber based on the hydrofluoric acid corrosion technology has extremely high controllability on the processing size, and the processing depth of the H-shaped surface on the optical fiber can be strictly controlled by controlling the corrosion time;
(4) The manufacturing method of the I-shaped optical fiber based on the hydrofluoric acid corrosion technology is applicable to traditional single mode optical fibers and special optical fibers, the types of fiber cores of the optical fibers include but are not limited to round fiber core optical fibers and square fiber core optical fibers, and the manufacturing method has general applicability to various optical fibers mainly containing silicon elements;
(5) The H-shaped optical fiber manufactured by the H-shaped optical fiber manufacturing method based on the hydrofluoric acid corrosion technology has long storage life, and the tolerance of the H-shaped optical fiber platform to the environmental instability is greatly enhanced;
(6) According to the manufacturing method of the I-shaped optical fiber based on the hydrofluoric acid corrosion technology, if only one side face of the optical fiber is subjected to corrosion processing, the traditional D-shaped optical fiber can be obtained, and the flatness and the processing depth of the D-shaped surface can be strictly ensured.
Drawings
FIG. 1 is a schematic diagram of a three-dimensional structure of an I-shaped optical fiber manufacturing method based on hydrofluoric acid corrosion technology;
FIG. 2 is a schematic top view and dimensioning of a liquid tank;
FIG. 3 is a schematic diagram of a perspective structure and sizing of a collation fixture;
FIG. 4 is a schematic top view and dimensioning of an optical fiber compact wrapped with rubber sleeves;
FIG. 5 is a front view and a schematic illustration of a fiber optic block wrapped with rubber sleeves;
FIG. 6 is a schematic illustration of the operation of the rubber boot prior to transfer to a new fiber compact;
FIG. 7 is a schematic illustration of the operation of the rubber boot after transfer to a new fiber compact;
FIG. 8 is a cross-sectional view and schematic illustration of an I-shaped fiber with a round core;
FIG. 9 is a cross-sectional view and schematic illustration of a standard processed square core I-shaped optical fiber;
FIG. 10 is a cross-sectional view and schematic illustration of a diagonally-machined square-core I-shaped optical fiber;
Detailed Description
Embodiment one:
the manufacturing method of the I-shaped optical fiber based on the hydrofluoric acid corrosion technology is shown in figure 1. Stage 1, liquid tank 2, moving rail 3, slider 4, slider 5, slider 6, slider 7, spring 8, spring 9, spring 10, spring 11, optical fiber holder 12, optical fiber holder 13, optical fiber holder 14, optical fiber holder 15, optical fiber 16, optical fiber press block 17, and rubber jacket 18.
The collation jig 19 is shown in fig. 3. The optical fiber pressing block 17, the rubber sleeve 18, the checking fixture 19 and the new optical fiber pressing block 21 are operated in the modes shown in fig. 4, 5, 6 and 7, and a buckle 20 is arranged on one side of the rubber sleeve 18. The cross section of the circular core I-shaped optical fiber structure is shown in fig. 8, and comprises a fiber core 22 and a cladding 23.
The specific combination mode is as follows: the middle part of the objective table 1 is fixed with a liquid groove 2, and the parts of the objective table 1 at two sides of the liquid groove 2 are processed to form a moving track 3; the sliding block 4, the sliding block 5, the sliding block 6 and the sliding block 7 can freely slide within the limit range of the moving track 3, the sliding block 4 and the sliding block 5 are connected by a spring 8, and the sliding block 6 and the sliding block 7 are connected by a spring 9; the left side edge of the sliding block 5 is connected with the left side edge of the liquid tank 2 by a spring 10, and the right side edge of the sliding block 6 is connected with the right side edge of the liquid tank 2 by a spring 11; the slide 4, the slide 5, the slide 6 and the slide 7 are respectively provided with an optical fiber clamp 12, an optical fiber clamp 13, an optical fiber clamp 14 and an optical fiber clamp 15.
The optical fiber 16 of this embodiment is a round core optical fiber. Firstly, removing a coating layer from a region to be processed of the optical fiber 16, embedding the optical fiber 16 into lead powder for a period of time, taking out the optical fiber, then placing the optical fiber 16 wrapped with the lead powder at the approximate position of the middle part of an optical fiber pressing block 17, adding a customized rubber sleeve 18 on two sides of the optical fiber pressing block 17 and extruding the optical fiber 16, confirming that the rubber sleeve 18 is extruded to an exact position by using a calibration clamp 19, at the moment, firmly fixing the optical fiber 16 in a gap of the rubber sleeve 18, and finally dipping absolute ethyl alcohol into a soft pen to remove the lead powder exposed in the air on the surface of the current optical fiber. Placing one surface of the optical fiber pressing block 17 with the fixed optical fiber 16 downwards in the liquid tank 2, then extruding the sliding block 5 and the sliding block 6 towards the direction of the liquid tank 2, enabling the distances between the sliding block 5 and the sliding block 6 and the edges of the liquid tank 2 to be approximately the same, fixing the tail fiber part of the optical fiber 16 to be processed by utilizing the optical fiber clamp 13 and the optical fiber clamp 14, and loosening the sliding block 5 and the sliding block 6 to naturally stretch the optical fiber 16 outside the liquid tank 2; the slide block 4 and the slide block 7 are extruded towards the direction of the liquid tank 2, and the rest optical fiber 16 is fixed by the optical fiber clamp 12 and the optical fiber clamp 15, so that the rest part of the tail optical fiber of the optical fiber 16 is naturally stretched. And (3) injecting hydrofluoric acid into the liquid tank 2, so that the liquid level of the hydrofluoric acid is higher than the bottom surface of the optical fiber pressing block 17, and finishing the corrosion processing of one side surface of the optical fiber 16 after waiting for 15 minutes.
After the etching of one side of the optical fiber 16 is completed, the hydrofluoric acid in the liquid tank 2 is pumped by a syringe, then deionized water is injected, residual hydrofluoric acid on the surface of the etched optical fiber 16 is cleaned, the sample is left to stand for 5 minutes after the deionized water is injected, and then deionized water waste liquid is pumped out and new deionized water is injected. After repeating the process of changing water and leaving the sample for 6 times, the waste liquid remaining in the liquid tank 2 was extracted, and the etched side of the optical fiber 16 was allowed to air dry naturally. Opening the optical fiber clamp 13 and the optical fiber clamp 14, releasing stress born by tail fibers of the optical fibers 16 near the optical fiber pressing block 17, picking up the optical fiber pressing block 17 currently wrapping the rubber sleeve 18, placing the pressing block 17 into the checking clamp 19, placing the new optical fiber pressing block 21 into the checking clamp 19 and placing the new optical fiber pressing block under the optical fiber pressing block 17 wrapping the rubber sleeve 18, unlocking the buckle 20 on the rubber sleeve 18, changing the annular rubber sleeve 18 into a belt shape and naturally sagging, and re-buckling the buckle 20 of the rubber sleeve 18 on the new optical fiber pressing block 21 to finish the transfer of the rubber sleeve 18 to the new optical fiber pressing block 21. The transfer process of the rubber boot 18 is described with reference to fig. 6 and 7.
The optical fiber clamp 12 and the optical fiber clamp 15 are opened, the whole sample containing the optical fiber 16, the rubber sleeve 18 and the new optical fiber pressing block 21 is taken out, the surface of the new optical fiber pressing block 21 for fixing the optical fiber 16 is downward, and the lead powder of the current optical fiber 16 exposed in the air is removed by dipping absolute ethyl alcohol with a soft brush. Placing a new optical fiber pressing block 21 into the liquid tank 2, extruding the sliding block 5 and the sliding block 6 towards the direction of the liquid tank 2, enabling the distances between the sliding block 5 and the sliding block 6 and the edges of the liquid tank 2 to be approximately the same, fixing tail fiber parts of the optical fibers 16 to be processed by using the optical fiber clamp 13 and the optical fiber clamp 14, and loosening the sliding block 5 and the sliding block 6 to naturally stretch the optical fibers 16 outside the liquid tank 2; the slide block 4 and the slide block 7 are extruded towards the direction of the liquid tank 2, and the rest optical fiber 16 is fixed by the optical fiber clamp 12 and the optical fiber clamp 15, so that the rest part of the tail optical fiber of the optical fiber 16 is naturally stretched. And (3) injecting hydrofluoric acid into the liquid tank 2, so that the liquid level of the hydrofluoric acid is higher than the bottom surface of the optical fiber pressing block 2, and finishing the corrosion processing of the second side surface of the optical fiber 16 after waiting for 15 minutes.
After the etching process is completed, the hydrofluoric acid in the liquid tank is pumped out by a syringe, then deionized water is injected, residual hydrofluoric acid on the surface of the etched optical fiber 16 is cleaned, the sample is kept stand for 5 minutes after the deionized water is injected, and then deionized water waste liquid is pumped out and new deionized water is injected. After repeating the process of changing water and leaving the sample for 6 times, the waste liquid remaining in the liquid tank 2 was drawn out, and the side of the optical fiber 16 currently being etched was allowed to air dry naturally. Opening the optical fiber clamp 13 and the optical fiber clamp 14, releasing stress born by tail fibers of the optical fibers 16 near the new optical fiber pressing block 21, opening the optical fiber clamp 12 and the optical fiber clamp 15, taking out the new optical fiber pressing block 21, opening the buckle 20 of the rubber sleeve 18, taking out the optical fibers 16, and obtaining the I-shaped optical fibers with two nearly strictly parallel sides.
Referring to fig. 2, the outer edge length W of the liquid tank 2 1 12cm, inner edge length W 2 The length of the liquid tank 2 is 8cm, the width H of the outer edge 1 10cm, inner edge width H 2 6cm.
Referring to FIG. 3, the outer edge length W of the collation jig 19 3 Length W of hollowed-out part is 9cm 4 5cm, outer edge height H 3 16cm.
Referring to fig. 4 and 5, the length W of the optical fiber compact 17 6 6cm, width D 1 5cm, height H 4 4cm; rubber sleeve 18 width D 2 2.4875 ×10 4 μm; length W of optical fiber pressing block 17 after wrapping rubber sleeve 18 5 6.5cm, height H 5 4.5cm.
Referring to FIG. 8, in the H-shaped optical fiber obtained after processing, the distance D between the H-shaped surface and the round fiber core 3 42.5 μm.
Embodiment two:
the manufacturing method of the I-shaped optical fiber based on the hydrofluoric acid corrosion technology is shown in figure 1. Stage 1, liquid tank 2, moving rail 3, slider 4, slider 5, slider 6, slider 7, spring 8, spring 9, spring 10, spring 11, optical fiber holder 12, optical fiber holder 13, optical fiber holder 14, optical fiber holder 15, optical fiber 16, optical fiber press block 17, and rubber jacket 18.
The collation jig 19 is shown in fig. 3. The optical fiber pressing block 17, the rubber sleeve 18, the checking fixture 19 and the new optical fiber pressing block 21 are operated in the modes shown in fig. 4, 5, 6 and 7, and a buckle 20 is arranged on one side of the rubber sleeve 18. The cross-section of a standard processed square core I-shaped fiber structure is shown in FIG. 9, and comprises a core 22 and a cladding 23.
The specific combination mode is as follows: the middle part of the objective table 1 is fixed with a liquid groove 2, and the parts of the objective table 1 at two sides of the liquid groove 2 are processed to form a moving track 3; the sliding block 4, the sliding block 5, the sliding block 6 and the sliding block 7 can freely slide within the limit range of the moving track 3, the sliding block 4 and the sliding block 5 are connected by a spring 8, and the sliding block 6 and the sliding block 7 are connected by a spring 9; the left side edge of the sliding block 5 is connected with the left side edge of the liquid tank 2 by a spring 10, and the right side edge of the sliding block 6 is connected with the right side edge of the liquid tank 2 by a spring 11; the slide 4, the slide 5, the slide 6 and the slide 7 are respectively provided with an optical fiber clamp 12, an optical fiber clamp 13, an optical fiber clamp 14 and an optical fiber clamp 15.
The optical fiber 16 of this embodiment is a square core optical fiber. Firstly, removing a coating layer from a region to be processed of an optical fiber 16, embedding lead powder into the region for a period of time, taking out the region, then placing the optical fiber 16 coated with the lead powder at a approximate position in the middle of an optical fiber pressing block 17, enabling a square fiber core plane to be parallel to the bottom surface of the optical fiber pressing block 17, adding a customized rubber sleeve 18 on two sides of the optical fiber pressing block 17, extruding the rubber sleeve 18 towards the direction of the optical fiber 16, confirming that the rubber sleeve 18 is extruded to an exact position by utilizing a calibration clamp 19, at the moment, firmly fixing the optical fiber 16 in a gap of the rubber sleeve 18, and finally dipping absolute ethyl alcohol into a soft brush to remove the lead powder exposed in the air on the surface of the current optical fiber. Placing one surface of the optical fiber pressing block 17 with the fixed optical fiber 16 downwards in the liquid tank 2, then extruding the sliding block 5 and the sliding block 6 towards the direction of the liquid tank 2, enabling the distances between the sliding block 5 and the sliding block 6 and the edges of the liquid tank 2 to be approximately the same, fixing the tail fiber part of the optical fiber 16 to be processed by utilizing the optical fiber clamp 13 and the optical fiber clamp 14, and loosening the sliding block 5 and the sliding block 6 to naturally stretch the optical fiber 16 outside the liquid tank 2; the slide block 4 and the slide block 7 are extruded towards the direction of the liquid tank 2, and the rest optical fiber 16 is fixed by the optical fiber clamp 12 and the optical fiber clamp 15, so that the rest part of the tail optical fiber of the optical fiber 16 is naturally stretched. And (3) injecting hydrofluoric acid into the liquid tank 2, so that the liquid level of the hydrofluoric acid is higher than the bottom surface of the optical fiber pressing block 17, and finishing the corrosion processing of one side surface of the optical fiber 16 after waiting for 22 minutes.
After the etching of one side of the optical fiber 16 is completed, the hydrofluoric acid in the liquid tank 2 is pumped by a syringe, then deionized water is injected, residual hydrofluoric acid on the surface of the etched optical fiber 16 is cleaned, the sample is left to stand for 5 minutes after the deionized water is injected, and then deionized water waste liquid is pumped out and new deionized water is injected. After the process of changing water and leaving the sample standing was repeated 8 times, the waste liquid remaining in the liquid tank 2 was extracted, and the etched side of the optical fiber 16 was allowed to air dry naturally. Opening the optical fiber clamp 13 and the optical fiber clamp 14, releasing stress born by tail fibers of the optical fibers 16 near the optical fiber pressing block 17, picking up the optical fiber pressing block 17 currently wrapping the rubber sleeve 18, placing the pressing block 17 into the checking clamp 19, placing the new optical fiber pressing block 21 into the checking clamp 19 and placing the new optical fiber pressing block under the optical fiber pressing block 17 wrapping the rubber sleeve 18, unlocking the buckle 20 on the rubber sleeve 18, changing the annular rubber sleeve 18 into a belt shape and naturally sagging, and re-buckling the buckle 20 of the rubber sleeve 18 on the new optical fiber pressing block 21 to finish the transfer of the rubber sleeve 18 to the new optical fiber pressing block 21. The transfer process of the rubber boot 18 is described with reference to fig. 6 and 7.
The optical fiber clamp 12 and the optical fiber clamp 15 are opened, the whole sample containing the optical fiber 16, the rubber sleeve 18 and the new optical fiber pressing block 21 is taken out, the surface of the new optical fiber pressing block 21 for fixing the optical fiber 16 is downward, and the lead powder of the current optical fiber 16 exposed in the air is removed by dipping absolute ethyl alcohol with a soft brush. Placing a new optical fiber pressing block 21 into the liquid tank 2, extruding the sliding block 5 and the sliding block 6 towards the direction of the liquid tank 2, enabling the distances between the sliding block 5 and the sliding block 6 and the edges of the liquid tank 2 to be approximately the same, fixing tail fiber parts of the optical fibers 16 to be processed by using the optical fiber clamp 13 and the optical fiber clamp 14, and loosening the sliding block 5 and the sliding block 6 to naturally stretch the optical fibers 16 outside the liquid tank 2; the slide block 4 and the slide block 7 are extruded towards the direction of the liquid tank 2, and the rest optical fiber 16 is fixed by the optical fiber clamp 12 and the optical fiber clamp 15, so that the rest part of the tail optical fiber of the optical fiber 16 is naturally stretched. And (3) injecting hydrofluoric acid into the liquid tank 2, so that the liquid level of the hydrofluoric acid is higher than the bottom surface of the optical fiber pressing block 2, and finishing the corrosion processing of the second side surface of the optical fiber 16 after waiting for 22 minutes.
After the etching process is completed, the hydrofluoric acid in the liquid tank is pumped out by a syringe, then deionized water is injected, residual hydrofluoric acid on the surface of the etched optical fiber 16 is cleaned, the sample is kept stand for 5 minutes after the deionized water is injected, and then deionized water waste liquid is pumped out and new deionized water is injected. After the process of changing water and leaving the sample stand was repeated 8 times, the waste liquid remaining in the liquid tank 2 was drawn out, and the side of the optical fiber 16 currently being etched was allowed to air dry naturally. Opening the optical fiber clamp 13 and the optical fiber clamp 14, releasing stress born by tail fibers of the optical fibers 16 near the new optical fiber pressing block 21, opening the optical fiber clamp 12 and the optical fiber clamp 15, taking out the new optical fiber pressing block 21, opening the buckle 20 of the rubber sleeve 18, taking out the optical fibers 16, and obtaining the I-shaped optical fibers with two nearly strictly parallel sides.
Referring to fig. 2, the outer edge length W of the liquid tank 2 1 16cm, inner edge length W 2 The length of the liquid tank 2 is 12cm, the width H of the outer edge 1 12cm, inner edge width H 2 8cm.
Referring to FIG. 3, the outer edge length W of the collation jig 19 3 Length W of hollowed-out part is 12cm 4 7cm, outer edge height H 3 20cm.
Referring to fig. 4 and 5, the length W of the optical fiber compact 17 6 7cm, width D 1 7cm, height H 4 8cm; rubber sleeve 18 width D 2 3.4875 ×10 4 μm; length W of optical fiber pressing block 17 after wrapping rubber sleeve 18 5 7.5cm, height H 5 8.5cm.
Referring to fig. 9, in the i-shaped optical fiber obtained after processing, the distance D between the i-shaped surface and the square fiber core 3 Is 35 mu m and the square fiber core plane is parallel to the I-shaped surface.
Embodiment III:
the manufacturing method of the I-shaped optical fiber based on the hydrofluoric acid corrosion technology is shown in figure 1. Stage 1, liquid tank 2, moving rail 3, slider 4, slider 5, slider 6, slider 7, spring 8, spring 9, spring 10, spring 11, optical fiber holder 12, optical fiber holder 13, optical fiber holder 14, optical fiber holder 15, optical fiber 16, optical fiber press block 17, and rubber jacket 18.
The collation jig 19 is shown in fig. 3. The optical fiber pressing block 17, the rubber sleeve 18, the checking fixture 19 and the new optical fiber pressing block 21 are operated in the modes shown in fig. 4, 5, 6 and 7, and a buckle 20 is arranged on one side of the rubber sleeve 18. The cross section of the diagonally processed square-core I-shaped optical fiber structure is shown in FIG. 10, and comprises a fiber core 22 and a cladding 23.
The specific combination mode is as follows: the middle part of the objective table 1 is fixed with a liquid groove 2, and the parts of the objective table 1 at two sides of the liquid groove 2 are processed to form a moving track 3; the sliding block 4, the sliding block 5, the sliding block 6 and the sliding block 7 can freely slide within the limit range of the moving track 3, the sliding block 4 and the sliding block 5 are connected by a spring 8, and the sliding block 6 and the sliding block 7 are connected by a spring 9; the left side edge of the sliding block 5 is connected with the left side edge of the liquid tank 2 by a spring 10, and the right side edge of the sliding block 6 is connected with the right side edge of the liquid tank 2 by a spring 11; the slide 4, the slide 5, the slide 6 and the slide 7 are respectively provided with an optical fiber clamp 12, an optical fiber clamp 13, an optical fiber clamp 14 and an optical fiber clamp 15.
The optical fiber 16 of this embodiment is a square core optical fiber. Firstly, removing a coating layer from a region to be processed of an optical fiber 16, embedding the optical fiber 16 into lead powder for a period of time, taking out the optical fiber, then placing the optical fiber 16 wrapped with the lead powder at a approximate position in the middle of an optical fiber pressing block 17, forming an included angle of 45 degrees between the square fiber core plane and the bottom surface of the optical fiber pressing block 17, adding a customized rubber sleeve 18 on two sides of the optical fiber pressing block 17 and extruding the optical fiber 16, confirming that the rubber sleeve 18 is extruded to an exact position by utilizing a correction clamp 19, at the moment, firmly fixing the optical fiber 16 in a gap of the rubber sleeve 18, and finally dipping absolute ethyl alcohol by using a soft pen brush to remove the lead powder exposed in the air on the surface of the current optical fiber. Placing one surface of the optical fiber pressing block 17 with the fixed optical fiber 16 downwards in the liquid tank 2, then extruding the sliding block 5 and the sliding block 6 towards the direction of the liquid tank 2, enabling the distances between the sliding block 5 and the sliding block 6 and the edges of the liquid tank 2 to be approximately the same, fixing the tail fiber part of the optical fiber 16 to be processed by utilizing the optical fiber clamp 13 and the optical fiber clamp 14, and loosening the sliding block 5 and the sliding block 6 to naturally stretch the optical fiber 16 outside the liquid tank 2; the slide block 4 and the slide block 7 are extruded towards the direction of the liquid tank 2, and the rest optical fiber 16 is fixed by the optical fiber clamp 12 and the optical fiber clamp 15, so that the rest part of the tail optical fiber of the optical fiber 16 is naturally stretched. And (3) injecting hydrofluoric acid into the liquid tank 2, so that the liquid level of the hydrofluoric acid is higher than the bottom surface of the optical fiber pressing block 2, and finishing the corrosion processing of one side surface of the optical fiber 16 after waiting for 19 minutes.
After the etching of one side of the optical fiber 16 is completed, the hydrofluoric acid in the liquid tank 2 is pumped by a syringe, then deionized water is injected, residual hydrofluoric acid on the surface of the etched optical fiber 16 is cleaned, the sample is left to stand for 5 minutes after the deionized water is injected, and then deionized water waste liquid is pumped out and new deionized water is injected. After repeating the process of changing water and leaving the sample at rest 7 times, the waste liquid remaining in the liquid tank 2 was extracted, and the etched side of the optical fiber 16 was allowed to air dry naturally. Opening the optical fiber clamp 13 and the optical fiber clamp 14, releasing stress born by tail fibers of the optical fibers 16 near the optical fiber pressing block 17, picking up the optical fiber pressing block 17 currently wrapping the rubber sleeve 18, placing the pressing block 17 into the checking clamp 19, placing the new optical fiber pressing block 21 into the checking clamp 19 and placing the new optical fiber pressing block under the optical fiber pressing block 17 wrapping the rubber sleeve 18, unlocking the buckle 20 on the rubber sleeve 18, changing the annular rubber sleeve 18 into a belt shape and naturally sagging, and re-buckling the buckle 20 of the rubber sleeve 18 on the new optical fiber pressing block 21 to finish the transfer of the rubber sleeve 18 to the new optical fiber pressing block 21. The transfer process of the rubber boot 18 is described with reference to fig. 6 and 7.
The optical fiber clamp 12 and the optical fiber clamp 15 are opened, the whole sample containing the optical fiber 16, the rubber sleeve 18 and the new optical fiber pressing block 21 is taken out, the surface of the new optical fiber pressing block 21 for fixing the optical fiber 16 is downward, and the lead powder of the current optical fiber 16 exposed in the air is removed by dipping absolute ethyl alcohol with a soft brush. Placing a new optical fiber pressing block 21 into the liquid tank 2, extruding the sliding block 5 and the sliding block 6 towards the direction of the liquid tank 2, enabling the distances between the sliding block 5 and the sliding block 6 and the edges of the liquid tank 2 to be approximately the same, fixing tail fiber parts of the optical fibers 16 to be processed by using the optical fiber clamp 13 and the optical fiber clamp 14, and loosening the sliding block 5 and the sliding block 6 to naturally stretch the optical fibers 16 outside the liquid tank 2; the slide block 4 and the slide block 7 are extruded towards the direction of the liquid tank 2, and the rest optical fiber 16 is fixed by the optical fiber clamp 12 and the optical fiber clamp 15, so that the rest part of the tail optical fiber of the optical fiber 16 is naturally stretched. And (3) injecting hydrofluoric acid into the liquid tank 2, so that the liquid level of the hydrofluoric acid is higher than the bottom surface of the optical fiber pressing block 2, and finishing the corrosion processing of the second side surface of the optical fiber 16 after waiting 19 minutes.
After the etching process is completed, the hydrofluoric acid in the liquid tank is pumped out by a syringe, then deionized water is injected, residual hydrofluoric acid on the surface of the etched optical fiber 16 is cleaned, the sample is kept stand for 5 minutes after the deionized water is injected, and then deionized water waste liquid is pumped out and new deionized water is injected. After repeating the process of changing water and leaving the sample at rest 7 times, the waste liquid remaining in the liquid tank 2 was drawn out, and the side of the optical fiber 16 currently being etched was allowed to air dry naturally. Opening the optical fiber clamp 13 and the optical fiber clamp 14, releasing stress born by tail fibers of the optical fibers 16 near the new optical fiber pressing block 21, opening the optical fiber clamp 12 and the optical fiber clamp 15, taking out the new optical fiber pressing block 21, opening the buckle 20 of the rubber sleeve 18, taking out the optical fibers 16, and obtaining the I-shaped optical fibers with two nearly strictly parallel sides.
Referring to fig. 2, the outer edge length W of the liquid tank 2 1 20cm, inner edge length W 2 The length of the liquid tank 2 is 16cm, the width H of the outer edge 1 14cm, inner edge width H 2 10cm.
Referring to FIG. 3, the outer edge length W of the collation jig 19 3 Length W of hollowed-out part is 14cm 4 Height of outer edge H of 9cm 3 20cm.
Referring to fig. 4 and 5, the length W of the optical fiber compact 17 6 10cm, width D 1 9cm, height H 4 8cm; rubber sleeve 18 width D 2 4.4875 ×10 4 μm; length W of optical fiber pressing block 17 after wrapping rubber sleeve 18 5 10.5cm, height H 5 8.5cm.
Referring to FIG. 8, in the H-shaped optical fiber obtained after processing, the distance D between the H-shaped surface and the square fiber core 3 Is 38.5 mu m, and the square fiber core plane forms an included angle of 45 degrees with the I-shaped surface.
Claims (6)
1. The manufacturing method of the I-shaped optical fiber based on the hydrofluoric acid corrosion technology is characterized by comprising the following steps of: firstly removing a coating layer from a region to be processed of an optical fiber (16), embedding lead powder into the region for a period of time, taking out the region, then placing the optical fiber (16) wrapped with the lead powder in the middle of an optical fiber pressing block (17), adding customized rubber sleeves (18) on two sides of the optical fiber pressing block (17) and pressing the region towards the optical fiber (16), confirming that the rubber sleeves (18) are pressed to an exact position by using a correction clamp (19), at the moment, firmly fixing the optical fiber (16) in a gap of the rubber sleeves (18), finally dipping absolute ethyl alcohol into a soft brush to remove the lead powder exposed in the air on the surface of the current optical fiber, placing one surface of the optical fiber pressing block (17) with the optical fiber (16) fixed in a liquid tank (2) downwards, pressing a second slider (5) and a third slider (6) towards the direction of the liquid tank (2), fixing the tail fiber parts of the optical fiber to be processed (16) by using the second optical fiber clamp (13) and the third optical fiber clamp (14), and loosening the second slider (5) and the third slider (6) to make the optical fiber outside the liquid tank (2) natural; the first slider (4) and the fourth slider (7) are extruded towards the direction of the liquid tank (2) and the first optical fiber clamp (12) and the fourth optical fiber clamp (15) are utilized to fix the rest optical fiber (16), so that the rest part of the tail optical fiber of the optical fiber (16) is naturally stretched and straightened, hydrofluoric acid is injected into the liquid tank (2), the liquid level of the hydrofluoric acid is higher than the bottom surface of the optical fiber pressing block (17), and after waiting for 15 minutes, the corrosion processing of one side surface of the optical fiber (16) is completed; after the corrosion processing of one side surface of the optical fiber (16) is finished, pumping hydrofluoric acid in the liquid tank (2) by using a syringe, then injecting deionized water, cleaning residual hydrofluoric acid on the surface of the corroded optical fiber (16), standing a sample for 5 minutes after injecting deionized water, then pumping deionized water waste liquid, injecting new deionized water, repeating the water changing and standing processes for 6 times, pumping the residual waste liquid in the liquid tank (2), naturally airing the corroded side surface of the optical fiber (16), opening the second optical fiber clamp (13) and the third optical fiber clamp (14), releasing stress born by tail fibers of the optical fiber (16) near the optical fiber press block (17), picking up the optical fiber press block (17) currently wrapping the rubber sleeve (18), putting the optical fiber press block (17) into a correction clamp (19), putting the new optical fiber press block (21) into the correction clamp (19) and under the optical fiber press block (17) wrapping the rubber sleeve (18), unlocking the annular rubber sleeve (18), changing the annular rubber sleeve (18) into a strip shape and naturally sagging, and re-buckling the rubber sleeve (18) on the new optical fiber press block (21), thereby completing the transfer of the new optical fiber press block (21) to the rubber sleeve (18; opening a first optical fiber clamp (12) and a fourth optical fiber clamp (15), taking out a whole sample containing an optical fiber (16), a rubber sleeve (18) and a new optical fiber pressing block (21), enabling the surface of the optical fiber (16) fixed on the new optical fiber pressing block (21) to face downwards, dipping absolute ethyl alcohol into the soft brush to remove lead powder exposed in the air of the current optical fiber (16), putting the new optical fiber pressing block (21) into a liquid tank (2), extruding a second sliding block (5) and a third sliding block (6) towards the direction of the liquid tank (2), enabling the distance between the second sliding block (5) and the third sliding block (6) and the edge of the liquid tank (2) to be the same, fixing a tail fiber part of the optical fiber (16) to be processed by utilizing the second optical fiber clamp (13) and the third optical fiber pressing block (14), and loosening the second sliding block (5) and the third sliding block (6) to enable the optical fiber (16) outside the liquid tank (2) to be stretched naturally; the first slider (4) and the fourth slider (7) are extruded towards the direction of the liquid tank (2) and the first optical fiber clamp (12) and the fourth optical fiber clamp (15) are utilized to fix the rest optical fiber (16), so that the rest part of the tail optical fiber of the optical fiber (16) is naturally stretched and straightened, hydrofluoric acid is injected into the liquid tank (2), the liquid level of the hydrofluoric acid is higher than the bottom surface of the new optical fiber pressing block (21), and after waiting for 15 minutes, the corrosion processing of the second side surface of the optical fiber (16) is completed; after the corrosion processing is finished, pumping hydrofluoric acid in a liquid tank by using a syringe, then injecting deionized water, cleaning residual hydrofluoric acid on the surface of the corroded optical fiber (16), standing a sample for 5 minutes after injecting deionized water, then pumping deionized water waste liquid, injecting new deionized water, repeating the water changing and standing processes for 6 times, pumping out the residual waste liquid in the liquid tank (2), naturally airing the side surface of the corroded optical fiber (16), opening the optical fiber clamp II (13) and the optical fiber clamp III (14), releasing stress born by tail fibers of the optical fiber (16) near the new optical fiber press block (21), opening the optical fiber clamp I (12) and the optical fiber clamp IV (15), taking out the new optical fiber press block (21), opening a buckle (20) of a rubber sleeve (18), and taking out the optical fiber (16) sample to obtain the I-shaped optical fiber with two parallel side surfaces; the manufacturing method of the I-shaped optical fiber adopts an I-shaped optical fiber manufacturing device, and the I-shaped optical fiber manufacturing device comprises the following steps: stage (1), liquid tank (2), moving track (3), first slider (4), second slider (5), third slider (6), fourth slider (7), first spring (8), second spring (9), third spring (10), fourth spring (11), first optical fiber clamp (12), second optical fiber clamp (13), third optical fiber clamp (14), fourth optical fiber clamp (15), optical fiber (16), optical fiber press block (17), rubber sleeve (18), calibration clamp (19), buckle (20) and new optical fiber press block (21); the object stage (1) is provided with moving tracks (3), the moving tracks (3) are distributed on two sides of the liquid tank (2), the first sliding block (4), the second sliding block (5), the third sliding block (6) and the fourth sliding block (7) can freely slide within a limited range of the moving tracks (3).
2. The method for manufacturing the I-shaped optical fiber based on the hydrofluoric acid corrosion technology according to claim 1, wherein the method comprises the following steps: one side of the rubber sleeve (18) is provided with a buckle (20), and the processing process of the I-shaped optical fiber is required to finish the transfer of the rubber sleeve (18) from the optical fiber pressing block (17) to a new optical fiber pressing block (21) by utilizing the buckle (20) and a correction clamp (19).
3. The method for manufacturing the I-shaped optical fiber based on the hydrofluoric acid corrosion technology according to claim 1, wherein the method comprises the following steps: the first sliding block (4) is connected with the second sliding block (5) through a first spring (8), and the third sliding block (6) is connected with the fourth sliding block (7) through a second spring (9); the second sliding block (5) is connected with the left side edge of the liquid tank (2) through a third spring (10), and the third sliding block (6) is connected with the right side edge of the liquid tank (2) through a fourth spring (11); the optical fiber clamp comprises a first sliding block (4), a second sliding block (5), a third sliding block (6) and a fourth sliding block (7), wherein an optical fiber clamp I (12), an optical fiber clamp II (13), an optical fiber clamp III (14) and an optical fiber clamp IV (15) are respectively arranged on the first sliding block and the fourth sliding block.
4. The method for manufacturing the I-shaped optical fiber based on the hydrofluoric acid corrosion technology according to claim 1, wherein the method comprises the following steps: injecting hydrofluoric acid and deionized water into the liquid tank (2) to respectively realize the functions of corroding the optical fiber and cleaning the optical fiber; during the etching process, lead powder is coated on a part of the surface of the optical fiber (16), and hydrofluoric acid cannot etch the part of the surface of the optical fiber coated with the lead powder.
5. The method for manufacturing the I-shaped optical fiber based on the hydrofluoric acid corrosion technology, which is applicable to the traditional single-mode optical fiber and the special optical fiber, wherein the fiber core types of the optical fiber (16) comprise round fiber core optical fiber and square fiber core optical fiber; the processing depth of the I-shaped optical fiber is strictly controlled by controlling the soaking time of the optical fiber (16) in the liquid tank (2).
6. The method for manufacturing the I-shaped optical fiber based on the hydrofluoric acid corrosion technology according to claim 1, wherein the manufacturing result of the method comprises the I-shaped optical fiber and the D-shaped optical fiber.
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