CN109270632B - Optical fiber interferometer manufacturing device and method - Google Patents
Optical fiber interferometer manufacturing device and method Download PDFInfo
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- CN109270632B CN109270632B CN201811477424.1A CN201811477424A CN109270632B CN 109270632 B CN109270632 B CN 109270632B CN 201811477424 A CN201811477424 A CN 201811477424A CN 109270632 B CN109270632 B CN 109270632B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/25—Preparing the ends of light guides for coupling, e.g. cutting
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B9/00—Measuring instruments characterised by the use of optical techniques
- G01B9/02—Interferometers
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/255—Splicing of light guides, e.g. by fusion or bonding
- G02B6/2551—Splicing of light guides, e.g. by fusion or bonding using thermal methods, e.g. fusion welding by arc discharge, laser beam, plasma torch
Abstract
The application provides an optical fiber interferometer making devices, including optical fiber length measuring unit, optic fibre cutting unit, the poor measuring unit of first arm length, first optic fibre butt fusion unit and second optic fibre butt fusion unit, when making optical fiber interferometer, the optic fibre centre gripping is in anchor clamps, and the anchor clamps block carries out the cutting for the first time according to the length of measuring optic fibre on the base, obtains cutting optic fibre. The cutting optical fiber and the clamp are taken down from the base together, then the difference value between the cutting optical fiber length and the required optical fiber length is measured through the first arm length difference measuring unit, then the optical fiber with one section of length is welded to obtain the welded optical fiber, and finally the clamp with the welded optical fiber is placed back on the base again. Therefore, the precise cutting task can be completed twice, and the method has the characteristics of low operation requirement and less time consumption.
Description
Technical Field
The application relates to the technical field of optical communication equipment manufacturing, in particular to a device and a method for manufacturing an optical fiber interferometer.
Background
The optical fiber interferometer is an optical instrument manufactured based on the principle of light interference, can be used for measuring physical quantities such as displacement, temperature, phase and the like, and can also be used for modulating or demodulating phase information, so that the optical fiber interferometer is widely applied to the fields of optics, engineering measurement, spectrum analysis and the like. The most common fiber interferometers are the Mach-zehnder (mz) interferometer, the Michelson interferometer, and the like. Since these optical fiber interferometers influence the interference effect by controlling the arm length difference, the accuracy of the arm length difference directly influences the performance of the interferometer, and is one of the important indexes of the interferometer.
The mode of accurate control arm length difference when current preparation interferometer mainly passes through grinder. Taking the fabrication of an equal-arm MZ interferometer as an example, a first arm optical fiber of the MZ interferometer is fused with another section of optical fiber forming one arm of the interferometer, the fused optical fiber is called a reference arm, after the reference arm is fabricated, the arm length difference of the two arm optical fibers of the interferometer is measured, and the length of the other arm optical fiber which needs to be cut off is recorded as delta L. The method comprises the steps of manufacturing an optical fiber of the other arm, setting a certain allowance under measurement of a scale microscope, cutting off the optical fiber with the length slightly smaller than delta L by using a gem knife, grinding the optical fiber of the other arm after cutting by using a grinding device, grinding the optical fiber of the arm, measuring the arm length difference of the two arms again after grinding is finished, repeating the steps until the arm length of the optical fiber of the arm meets the requirement if the arm length difference does not meet the requirement, obtaining a second arm optical fiber, and then welding the second arm optical fiber with the other section of optical fiber forming the other arm of the interferometer to obtain the MZ interferometer.
However, when the optical fiber interferometer is manufactured by using the grinding device, three processes are required to be performed each time of grinding, three grinding sheets with different roughness degrees are sequentially used, the process is complex, grinding may be performed for many times in the manufacturing process, and the working hours are long. In addition, the grinding amount is relatively difficult to control, and the lengths of grinding each time may vary from several micrometers to several tens of micrometers, so that the accuracy and consistency of the manufactured interferometers are poor, and if a high-accuracy interferometer is manufactured, a high requirement needs to be made for an operator.
Disclosure of Invention
The application provides an optical fiber interferometer manufacturing device and an optical fiber interferometer manufacturing method, which are used for solving the problems that an existing optical fiber interferometer manufacturing device is long in manufacturing work time and high in operation requirement.
A first aspect of the present application provides an optical fiber interferometer manufacturing apparatus, including an optical fiber length measuring unit, an optical fiber cutting unit, a first arm length difference measuring unit, a first optical fiber fusion splicing unit, and a second optical fiber fusion splicing unit;
the optical fiber length measuring unit is used for measuring the length of the optical fiber of the other arm;
the optical fiber cutting unit is used for cutting the optical fiber of the other arm for the first time according to the measured length of the optical fiber of the other arm to obtain a cut optical fiber;
the first arm length difference measuring unit is used for measuring the arm length difference between the cutting optical fiber and the first arm optical fiber to obtain an arm length difference value;
the first optical fiber welding unit is used for welding a section of optical fiber with a length of the cut optical fiber to obtain a welded optical fiber;
the optical fiber cutting unit is further used for cutting the fusion spliced optical fiber for the second time according to the arm length difference to obtain a second arm optical fiber, wherein the optical fiber cutting unit comprises a base and a clamp, the optical fiber is clamped in the clamp, the clamp is clamped on the base, and the clamping position of the clamp and the base is fixed;
and the second optical fiber welding unit is used for welding the second arm optical fiber with the other section of optical fiber forming one arm of the interferometer to obtain the MZ interferometer.
Preferably, before the second arm optical fiber is fusion-spliced, the optical fiber interferometer manufacturing apparatus further includes a second arm length difference measuring unit;
the second arm length difference measuring unit is used for measuring the arm length difference between the second arm optical fiber and the first arm optical fiber.
Preferably, a fixing column is arranged on the base;
the fixture is provided with fixing through holes with the same number as the fixing columns;
the shape of the fixing through hole is matched with that of the fixing column, the clamp is placed on the base, and the relative position of the clamp and the base is unchanged.
Preferably, the number of the fixing columns is at least two, a magnetic material is arranged in the base, and the clamp is made of a ferrous material.
Preferably, when the equal-arm interferometer is manufactured, the first arm length difference measuring unit comprises an optical fiber fusion splicer, a spectrometer and a wide-spectrum light source;
the optical fiber fusion splicer is used for aligning the cut optical fiber with another section of optical fiber forming the interferometer;
and after alignment, the incident end of the interferometer is connected with the wide-spectrum light source, and the emergent end of the interferometer is connected with the spectrometer.
Preferably, when the unequal arm interferometer is manufactured, the first arm length difference measuring unit further comprises a standard interferometer;
the standard interferometer is connected with the manufactured unequal arm interferometer, and the unequal arm interferometer for adjustable manufacturing is the equal arm interferometer.
A second aspect of the present application provides a method for manufacturing an optical fiber interferometer, the method being performed by using any one of the above-mentioned optical fiber interferometer manufacturing apparatuses to obtain an MZ interferometer, the method including:
s1, measuring the length of the optical fiber of the other arm to obtain a cutting length value;
s2, according to the measured length value, the optical fiber of the other arm is cut for the first time to obtain a cut optical fiber;
s3, measuring the arm length difference between the cut optical fiber and the first arm optical fiber to obtain an arm length difference value;
s4, the cutting optical fiber is welded with a section of optical fiber to obtain a welded optical fiber, the welded optical fiber is cut for the second time according to the arm length difference to obtain a second arm optical fiber, and the second arm optical fiber and the other section of optical fiber forming one arm of the interferometer are welded to obtain the MZ interferometer.
Preferably, the performing the first cutting according to the measured length value to obtain the cut optical fiber includes:
s201, according to the measured length value, firstly cutting redundant parts of the optical fiber on the other arm by using a common cutter to obtain a preprocessed optical fiber;
s202, calculating the length of the preprocessed optical fiber to be cut, enabling the length of the cut optical fiber to be larger than the length of the needed optical fiber by a certain margin, and marking the position of a cutting point on the optical fiber;
s203, starting a precision cutter in the optical fiber cutting unit, clamping the optical fiber in a clamp, adjusting the position of the clamp to enable the position of a cutting point to be approximately aligned with a tool bit of the precision cutter, and marking the relative position of the optical fiber and the clamp at the moment.
S204, the optical fiber is taken down from the clamp, a stripper is used for stripping the sleeve and the coating of the optical fiber, so that the optical fiber from the cutting point to the end point of the optical fiber is stripped into a bare fiber, the optical fiber is fixed in the clamp, and the relative position of the optical fiber and the clamp is restored according to the mark.
S205, fixing the clamp on the base, placing the bare fiber part in the bare fiber clamp on the side, opposite to the clamp, of the precision cutting knife, tensioning the bare fiber, fixing and cutting the bare fiber to obtain the cut optical fiber.
Preferably, the measuring the arm length difference between the cut optical fiber and the first arm optical fiber to obtain the arm length difference value includes:
s301, taking down the cut optical fiber and the clamp from the precision cutter together, wherein the clamp is not opened until a second arm optical fiber is obtained;
s302, aligning the cut optical fiber with another segment of optical fiber forming one arm of the interferometer by using an optical fiber fusion splicer;
s303, connecting the incident end of the aligned interferometer with a wide-spectrum light source in the first arm length difference measuring unit, and connecting the emergent end of the aligned interferometer with a spectrometer in the first arm length difference measuring unit;
s304, controlling the wide-spectrum light source to emit light;
s305, calculating the arm length difference at the moment according to the spectrum waveform displayed on the spectrometer to obtain the arm length difference value.
Preferably, the second cutting of the fusion spliced optical fiber according to the arm length difference to obtain a second arm optical fiber includes:
s401, calculating the length of the fusion spliced optical fiber to be cut according to the arm length difference;
s402, the clamp is replaced and fixed on the base again, and the moving distance of the base is controlled according to the length value of the fusion spliced optical fiber needing to be cut;
s403, cutting the fusion spliced optical fiber after the base is moved to obtain a second arm optical fiber
According to the above technical scheme, the present application provides an optical fiber interferometer manufacturing apparatus, including an optical fiber length measuring unit, an optical fiber cutting unit, a first arm length difference measuring unit, a first optical fiber fusion unit, and a second optical fiber fusion unit; the optical fiber length measuring unit is used for measuring the length of the optical fiber of the other arm; the optical fiber cutting unit is used for cutting the optical fiber of the other arm for the first time according to the measured length of the optical fiber of the other arm to obtain a cut optical fiber; the first arm length difference measuring unit is used for measuring the arm length difference between the cutting optical fiber and the first arm optical fiber to obtain an arm length difference value; the first optical fiber welding unit is used for welding a section of optical fiber with a length of the cut optical fiber to obtain a welded optical fiber; the optical fiber cutting unit is further used for cutting the fusion spliced optical fiber for the second time according to the arm length difference to obtain a second arm optical fiber, wherein the optical fiber cutting unit comprises a base and a clamp, the optical fiber is clamped in the clamp, the clamp is clamped on the base, and the clamping position of the clamp and the base is fixed; and the second optical fiber welding unit is used for welding the second arm optical fiber with the other section of optical fiber forming one arm of the interferometer to obtain the MZ interferometer.
Therefore, when the optical fiber interferometer is manufactured, the optical fiber is clamped in the clamp, the clamp is clamped on the base, and the optical fiber on the other arm is firstly cut for the first time according to the measured length of the optical fiber on the other arm to obtain the cut optical fiber. The cutting optical fiber and the clamp are taken down from the base together, the arm length difference between the arm formed by the cutting optical fiber and the first arm optical fiber is accurately measured through the first arm length difference measuring unit, the difference value between the length of the cutting optical fiber and the required optical fiber length is calculated, then the optical fiber with a section of length is welded on the cutting optical fiber to obtain the welded optical fiber, finally the clamp with the welded optical fiber is placed back on the base again, the clamping position of the clamp and the base is fixed, therefore, the distance of the base which needs to move can be accurately controlled for the second time, the welded optical fiber is cut for the second time after moving, and the second arm optical fiber is obtained. Because can set up the distance of cutting according to the measured result, the accurate cutting task can be accomplished to the secondary, therefore the optical fiber interferometer making devices of this application have the operation requirement low, the less characteristics of consuming time.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a block diagram of an apparatus for fabricating a fiber optic interferometer according to the present application;
FIG. 2 is a schematic structural diagram of an optical fiber cleaving unit of the present application;
FIG. 3 is a schematic structural view of a fixture of the present application;
fig. 4 is a block diagram of an optical fiber fusion splicing unit according to the present application.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, the present application is described in further detail with reference to the accompanying drawings and the detailed description.
In a first aspect of the present application, please refer to the block diagram of fig. 1, which provides an apparatus for fabricating a fiber interferometer. The optical fiber interferometer manufacturing device comprises an optical fiber length measuring unit 1, an optical fiber cutting unit 2, a first arm length difference measuring unit 3, a first optical fiber welding unit 4 and a second optical fiber welding unit 5; the optical fiber length measuring unit 1 is used for measuring the length of the optical fiber of the other arm; the optical fiber cutting unit 2 is used for cutting the optical fiber of the other arm for the first time according to the measured length of the optical fiber of the other arm to obtain a cut optical fiber; the first arm length difference measuring unit 3 is used for measuring the arm length difference between the cut optical fiber and the first arm optical fiber to obtain an arm length difference value; the first optical fiber welding unit 4 is used for welding a cut optical fiber with a length of optical fiber to obtain a welded optical fiber; the optical fiber cutting unit 2 is further configured to perform secondary cutting on the fusion spliced optical fiber according to the arm length difference to obtain a second arm optical fiber, where the optical fiber cutting unit 2 includes a base 21 and a clamp 22, the optical fiber is clamped in the clamp 22, the clamp 22 is clamped on the base 21, and a position where the clamp 22 is clamped with the base 21 is fixed; the second optical fiber fusion splicing unit 5 is used for fusion splicing the second arm optical fiber and the other section of optical fiber forming one arm of the interferometer to obtain the MZ interferometer.
Therefore, when the optical fiber interferometer manufacturing device of the application is used for manufacturing an optical fiber interferometer, the optical fiber is clamped in the clamp 22, the clamp 22 is clamped on the base 21, and the optical fiber on the other arm is firstly cut for the first time according to the length of the optical fiber on the other arm to be measured, so that the cut optical fiber is obtained. The cutting optical fiber and the clamp 22 are taken down from the base 21 together, the arm length difference between the arm formed by the cutting optical fiber and the first arm optical fiber is accurately measured through the first arm length difference measuring unit 3, the difference value between the length of the cutting optical fiber and the required optical fiber length is calculated, the cutting optical fiber is welded with a section of optical fiber to obtain a welded optical fiber, finally the clamp 22 clamping the welded optical fiber is placed back on the base 21 again, the clamping position of the clamp 22 and the base 21 is fixed, the distance of the base 21 needing to be moved can be accurately controlled for the second time, the welded optical fiber is cut for the second time after the clamp 22 and the base 21 are clamped together, and the second arm optical fiber is obtained. Because can set up the distance of cutting according to the measured result, the accurate cutting task can be accomplished to the secondary, therefore the optical fiber interferometer making devices of this application have the operation requirement low, the less characteristics of consuming time.
In a preferred embodiment of the present application, please refer to fig. 2 for a schematic structural diagram. Before the second arm optical fiber is welded, the optical fiber interferometer manufacturing device further comprises a second arm length difference measuring unit 6; the second arm length difference measuring unit 6 is used for measuring the arm length difference between the second arm optical fiber and the first arm optical fiber.
Because the optical fiber interferometer making devices of this application is when making optical fiber interferometer, because during first cutting, the uncertain optic fibre presss from both sides the position in anchor clamps 22, therefore, the length of cutting basically is unsatisfactory for the first time, thereby can learn optic fibre still need cut again how much through first arm length difference measuring unit 3 precision measurement, again because optic fibre fixes and does not take off on anchor clamps 22 and measure, consequently optic fibre is for the rigidity of anchor clamps 22, and anchor clamps 22 with the position of base 21 block is also fixed unchangeable, consequently, the precision cutting distance of optic fibre has been known, can be on the basis of the first time the accurate distance of moving base 21, thereby make the optic fibre of cutting for the second time be the second arm optic fibre promptly.
From the above cutting principle, if the second arm length difference measuring unit 6 measures that the optical fiber cut for the second time is not satisfactory, it indicates that the optical fiber interferometer manufacturing apparatus may have problems and needs to be overhauled and/or corrected. Therefore, the second arm length difference measuring unit 6 of the present application can be used to spot check whether the length of the second arm optical fiber meets the requirement, and therefore has the characteristics of simple structure and convenient use, and is also helpful for improving the shearing precision.
In a preferred embodiment of the present application, please refer to fig. 3 and fig. 4 for a schematic structural diagram. The optical fiber cutting unit 2 comprises a base 21 and a clamp 22; a fixing column 211 is arranged on the base 21; fixing through holes 221 with the same number as that of the fixing columns 211 are arranged on the clamp 22; the shape of the fixing through hole 221 is matched with the shape of the fixing column 211, so that the clamp 22 is placed on the base 21, and the relative position of the clamp 22 and the base 21 is unchanged.
Therefore, after the optical fiber is cut, the optical fiber is clamped in the clamp 22, the length of the cut optical fiber is measured, if the length of the optical fiber does not meet the requirement, the optical fiber is welded with a section of optical fiber, the clamp 22 is placed back on the base 21 again, and due to the structure of the fixing through hole 221 and the fixing column 211, the relative position of the clamp 22 relative to the base 21 is unchanged, so that a series of steps of re-measuring, adjusting and the like are saved when the optical fiber is cut again, the cutting distance can be set according to the measuring result, the cutting efficiency is improved, and the time consumption for manufacturing the optical fiber interferometer is reduced.
The number of the fixing columns 211 is at least two, a magnetic material is arranged in the base 21, and the clamp 22 is made of an iron material. Specifically, the jig 22 is prevented from being vertically moved relative to the base 21. If the clamp 22 shakes up and down, the optical fiber may tilt up and down, which may cause inaccurate cutting length and irregular cut end surface of the optical fiber. Therefore, base 21 makes for magnetic material, include be provided with the excitation module in the base 21, or be provided with the permanent magnet, anchor clamps 22 adopt the material that contains iron to make, guaranteed base 21 and firm row between the anchor clamps 22 can make the optic fibre length of cutting more accurate, saves the preparation time and reduces the operation requirement.
The fixed column 211 is provided with two at least, and thus the fixed column 211 is more firm to fix and is not easy to rotate. When the fixing post 211 is mounted, the fixing post 211 is inserted into the fixing through hole 221, so that the relative position of the clamp 22 with respect to the base 21 is unchanged. Therefore, the optical fiber interferometer manufacturing device has the characteristics of simple and reliable structure and convenience in use.
In a preferred embodiment of the present application, the arm length difference measuring unit 3 includes an optical fiber fusion splicer, a spectrometer, and a wide-spectrum light source; the fusion splicer is used for aligning the fusion splicing arm with another section of optical fiber forming one arm of the interferometer; the incidence end of the aligned interferometer is connected with the wide-spectrum light source, and the emergence end of the aligned interferometer is connected with the spectrometer.
Therefore, the spectrometer can accurately measure the arm length difference of the two arms of the interferometer, and the difference between the length of the fusion arm optical fiber and the threshold is calculated. Therefore, if the length of the optical fiber of the welding arm does not meet the requirement, the length of the optical fiber of the welding arm needs to be cut off or increased by a certain amount to meet the requirement, therefore, the base 21 is replaced after the optical fiber is cut and welded with a section of optical fiber, the distance of the base 21 moving leftwards or rightwards is controlled to be the difference, and the length of the cut optical fiber can be within the threshold range. Thereby further saving manufacturing time and reducing operating requirements.
When the unequal arm interferometer is manufactured, the first arm length difference measuring unit further comprises an adjusting interferometer; the standard interferometer is connected with the manufactured unequal arm interferometer, and the unequal arm interferometer for adjustable manufacturing is the equal arm interferometer. The equipment for measuring the equal-arm interferometer is common and simple and convenient to operate, so that if the equipment is used for manufacturing the unequal-arm interferometer, a standard interferometer can be connected in series on the manufactured interferometer, the unequal-arm interferometer and the standard interferometer are equal to the equal-arm interferometer, and the standard interferometer has known specification, so that the difference value between the length of the cut optical fiber and the actually required length can be obtained through measurement.
A second aspect of the present application provides a method for manufacturing an optical fiber interferometer, the method being performed by using any one of the above-mentioned optical fiber interferometer manufacturing apparatuses to obtain an MZ interferometer, the method including:
s1, measuring the length of the optical fiber of the other arm to obtain a cutting length value;
s2, according to the measured length value, the optical fiber of the other arm is cut for the first time to obtain a cut optical fiber;
s3, measuring the arm length difference between the cut optical fiber and the first arm optical fiber to obtain an arm length difference value;
s4, the cutting optical fiber is welded with a section of optical fiber to obtain a welded optical fiber, the welded optical fiber is cut for the second time according to the arm length difference to obtain a second arm optical fiber, and the second arm optical fiber and the other section of optical fiber forming one arm of the interferometer are welded to obtain the MZ interferometer.
In the method, a steel ruler with the specification of 1-5m can be used for measuring the length of the optical fiber, and the optical fiber can be cut according to the measured length by inputting the measurement result into the optical fiber interferometer manufacturing device. And after cutting, measuring the obtained cut optical fiber to obtain an arm length difference, cutting the fusion spliced optical fiber for the second time according to the arm length difference to obtain a second arm optical fiber, and finally performing fusion splicing to obtain an optical fiber interferometer finished product. Therefore, the method has the characteristics of simple steps and less time consumption for manufacturing.
In a preferred embodiment of the present application, the first cutting is performed according to the measured length value to obtain a cut optical fiber, including:
s201, according to the measured length value, firstly cutting redundant parts of the optical fiber on the other arm by using a common cutter to obtain a preprocessed optical fiber;
s202, calculating the length of the preprocessed optical fiber to be cut, enabling the length of the cut optical fiber to be larger than the length of the needed optical fiber by a certain margin, and marking the position of a cutting point on the optical fiber;
s203, starting a precision cutter in the optical fiber cutting unit, clamping the optical fiber in a clamp, adjusting the position of the clamp to enable the position of a cutting point to be approximately aligned with a tool bit of the precision cutter, and marking the relative position of the optical fiber and the clamp at the moment.
S204, the optical fiber is taken down from the clamp, a stripper is used for stripping the sleeve and the coating of the optical fiber, so that the optical fiber from the cutting point to the end point of the optical fiber is stripped into a bare fiber, the optical fiber is fixed in the clamp, and the relative position of the optical fiber and the clamp is restored according to the mark.
S205, fixing the clamp on the base, placing the bare fiber part in the bare fiber clamp on the side, opposite to the clamp, of the precision cutting knife, tensioning the bare fiber, fixing and cutting the bare fiber to obtain the cut optical fiber.
In the method, a common cutter is used firstly, and the optical fiber with a certain allowance is cut off to form an unnecessary part, wherein the allowance can be 3-5cm, which is more appropriate. And the precision cutting knife is used for precisely cutting the optical fiber interferometer, so that the cutting precision is ensured, the cutting times are reduced, the cutting efficiency is improved, and the time for manufacturing the optical fiber interferometer is reduced.
This application is a preferred scheme, measure the arm length difference of cutting optic fibre and first arm optic fibre, obtain the arm length difference value, include:
s301, taking down the cut optical fiber and the clamp from the precision cutter together, wherein the clamp is not opened until a second arm optical fiber is obtained;
s302, aligning the cut optical fiber with another segment of optical fiber forming one arm of the interferometer by using an optical fiber fusion splicer;
s303, connecting the incident end of the aligned interferometer with a wide-spectrum light source in the first arm length difference measuring unit, and connecting the emergent end of the aligned interferometer with a spectrometer in the first arm length difference measuring unit;
s304, controlling the wide-spectrum light source to emit light;
s305, calculating the arm length difference at the moment according to the spectrum waveform displayed on the spectrometer to obtain the arm length difference value.
Therefore, the spectrometer of the present application can accurately measure the arm length difference, so that the moving distance of the base 21 can be adjusted to meet the requirement of the length of the cut second arm optical fiber. The method of the present application can precisely control the distance that the base 21 moves, thereby achieving precise cutting, and can control the precision tolerance below 10 microns. Therefore, the method has the characteristics of high precision and low operation requirement.
According to arm length difference, carry out the cutting for the second time to the fusion spliced optic fibre, obtain second arm optic fibre, include:
s401, calculating the length of the fusion spliced optical fiber to be cut according to the arm length difference;
s402, the clamp is replaced and fixed on the base again, and the moving distance of the base is controlled according to the length value of the fusion spliced optical fiber needing to be cut;
s403, after the base is moved, cutting the fusion spliced optical fiber to obtain a second arm optical fiber.
Therefore, in the method, the precise cutting length can be known according to the measurement result, so that the moving distance of the base 21 can be precisely controlled, and the second arm optical fiber which meets the requirement can be rapidly obtained. Therefore, the method has the characteristics of simple steps, convenience in operation, high cutting accuracy, high manufacturing efficiency and the like.
The present application has been described in detail with reference to specific embodiments and illustrative examples, but the description is not intended to limit the application. Those skilled in the art will appreciate that various equivalent substitutions, modifications or improvements may be made to the presently disclosed embodiments and implementations thereof without departing from the spirit and scope of the present disclosure, and these fall within the scope of the present disclosure. The protection scope of this application is subject to the appended claims.
Claims (10)
1. An optical fiber interferometer manufacturing device is characterized by comprising an optical fiber length measuring unit (1), an optical fiber cutting unit (2), a first arm length difference measuring unit (3), a first optical fiber fusion splicing unit (4) and a second optical fiber fusion splicing unit (5);
the optical fiber length measuring unit (1) is used for measuring the length of the optical fiber of the other arm;
the optical fiber cutting unit (2) is used for cutting the optical fiber of the other arm for the first time according to the measured length of the optical fiber of the other arm to obtain a cut optical fiber;
the first arm length difference measuring unit (3) is used for measuring the arm length difference between the cut optical fiber and the first arm optical fiber to obtain an arm length difference value;
the first optical fiber welding unit (4) is used for welding a section of optical fiber with a cutting optical fiber to obtain a welded optical fiber;
the optical fiber cutting unit (2) is further used for cutting the fusion spliced optical fiber for the second time according to the arm length difference to obtain a second arm optical fiber, wherein the optical fiber cutting unit (2) comprises a base (21) and a clamp (22), the optical fiber is clamped in the clamp (22), the clamp (22) is clamped on the base (21), and the clamping position of the clamp (22) and the base (21) is fixed;
the second optical fiber welding unit (5) is used for welding the second arm optical fiber with the other section of optical fiber forming one arm of the interferometer to obtain the MZ interferometer.
2. The optical fiber interferometer manufacturing apparatus according to claim 1, further comprising a second arm length difference measuring unit (6) before fusion-splicing the second arm optical fiber;
the second arm length difference measuring unit (6) is used for measuring the arm length difference between the second arm optical fiber and the first arm optical fiber.
3. The optical fiber interferometer fabrication apparatus of claim 1 or 2,
a fixing column (211) is arranged on the base (21);
fixing through holes (221) with the same number as the fixing columns (211) are formed in the clamp (22);
the shape of the fixing through hole (221) is matched with that of the fixing column (211) and used for placing the clamp (22) on the base (21), and the relative position of the clamp (22) and the base (21) is unchanged.
4. The apparatus for manufacturing an optical fiber interferometer according to claim 3, wherein the number of the fixing posts (211) is at least two, the magnetic material is disposed in the base (21), and the clamp (22) is made of a ferrous material.
5. The optical fiber interferometer manufacturing apparatus according to claim 3, wherein the first arm length difference measuring unit (3) includes an optical fiber fusion splicer, a spectrometer, and a wide-spectrum light source when manufacturing the equal-arm interferometer;
the optical fiber fusion splicer is used for aligning the cut optical fiber with another section of optical fiber forming the interferometer;
and after alignment, the incident end of the interferometer is connected with the wide-spectrum light source, and the emergent end of the interferometer is connected with the spectrometer.
6. The optical fiber interferometer manufacturing apparatus according to claim 3, wherein the first arm length difference measuring unit (3) further includes a standard interferometer when manufacturing an unequal arm interferometer;
the standard interferometer is connected with the manufactured unequal arm interferometer, and the unequal arm interferometer for adjustable manufacturing is the equal arm interferometer.
7. A method for manufacturing a fiber optic interferometer, which is characterized in that the method adopts the fiber optic interferometer manufacturing apparatus of any one of claims 1-6 to manufacture a MZ interferometer, and the method comprises the following steps:
s1, measuring the length of the optical fiber of the other arm to obtain a cutting length value;
s2, according to the measured length value, the optical fiber of the other arm is cut for the first time to obtain a cut optical fiber;
s3, measuring the arm length difference between the cut optical fiber and the first arm optical fiber to obtain an arm length difference value;
s4, the cutting optical fiber is welded with a section of optical fiber to obtain a welded optical fiber, the welded optical fiber is cut for the second time according to the arm length difference to obtain a second arm optical fiber, and the second arm optical fiber and the other section of optical fiber forming one arm of the interferometer are welded to obtain the MZ interferometer.
8. The method for manufacturing the optical fiber interferometer according to claim 7, wherein the performing the first cutting according to the measured length value to obtain the cut optical fiber comprises:
s201, according to the measured length value, firstly cutting redundant parts of the optical fiber on the other arm by using a common cutter to obtain a preprocessed optical fiber;
s202, calculating the length of the preprocessed optical fiber to be cut, enabling the length of the cut optical fiber to be larger than the length of the needed optical fiber by a certain margin, and marking the position of a cutting point on the optical fiber;
s203, starting a precision cutter in the optical fiber cutting unit, clamping the optical fiber in a clamp, adjusting the position of the clamp to enable the position of a cutting point to be approximately aligned with a cutter head of the precision cutter, and marking the relative position of the optical fiber and the clamp at the moment;
s204, the optical fiber is taken down from the clamp, a wire stripper is used for stripping a sleeve and a coating of the optical fiber, the optical fiber from a cutting point to an optical fiber end point is stripped into a bare fiber, the optical fiber is fixed in the clamp, and the relative position of the optical fiber and the clamp is recovered according to the mark;
s205, fixing the clamp on the base, placing the bare fiber part in the bare fiber clamp on the side, opposite to the clamp, of the precision cutting knife, tensioning the bare fiber, fixing and cutting the bare fiber to obtain the cut optical fiber.
9. The method for manufacturing the optical fiber interferometer of claim 8, wherein the step of measuring the arm length difference between the cut optical fiber and the first arm optical fiber to obtain the arm length difference comprises:
s301, taking down the cut optical fiber and the clamp from the precision cutter together, wherein the clamp is not opened until a second arm optical fiber is obtained;
s302, aligning the cut optical fiber with another segment of optical fiber forming one arm of the interferometer by using an optical fiber fusion splicer;
s303, connecting the incident end of the aligned interferometer with a wide-spectrum light source in the first arm length difference measuring unit, and connecting the emergent end of the aligned interferometer with a spectrometer in the first arm length difference measuring unit;
s304, controlling the wide-spectrum light source to emit light;
s305, calculating the arm length difference at the moment according to the spectrum waveform displayed on the spectrometer to obtain the arm length difference value.
10. The method for manufacturing the optical fiber interferometer according to claim 9, wherein the second cutting of the fusion spliced optical fiber according to the arm length difference to obtain a second arm optical fiber comprises:
s401, calculating the length of the fusion spliced optical fiber to be cut according to the arm length difference;
s402, the clamp is replaced and fixed on the base again, and the moving distance of the base is controlled according to the length value of the fusion spliced optical fiber needing to be cut;
s403, after the base is moved, cutting the fusion spliced optical fiber to obtain a second arm optical fiber.
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|---|---|---|---|---|
| JP2004037809A (en) * | 2002-07-03 | 2004-02-05 | Shinko Electric Ind Co Ltd | Method for cutting optical fiber and working device for optical fiber |
| CN101573215A (en) * | 2006-10-26 | 2009-11-04 | 日新技术株式会社 | Optical fiber cleaver |
| CN101726796A (en) * | 2009-12-16 | 2010-06-09 | 电子科技大学 | Cutting device of high-precision optical fiber length and cutting method thereof |
| CN102980599A (en) * | 2012-11-15 | 2013-03-20 | 浙江大学 | Precise length matching method in optical fiber interference optical paths |
| CN209408609U (en) * | 2018-12-05 | 2019-09-20 | 北京中创为南京量子通信技术有限公司 | A kind of optical fiber cutter |
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|---|---|---|---|---|
| JP2004037809A (en) * | 2002-07-03 | 2004-02-05 | Shinko Electric Ind Co Ltd | Method for cutting optical fiber and working device for optical fiber |
| CN101573215A (en) * | 2006-10-26 | 2009-11-04 | 日新技术株式会社 | Optical fiber cleaver |
| CN101726796A (en) * | 2009-12-16 | 2010-06-09 | 电子科技大学 | Cutting device of high-precision optical fiber length and cutting method thereof |
| CN102980599A (en) * | 2012-11-15 | 2013-03-20 | 浙江大学 | Precise length matching method in optical fiber interference optical paths |
| CN209408609U (en) * | 2018-12-05 | 2019-09-20 | 北京中创为南京量子通信技术有限公司 | A kind of optical fiber cutter |
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