CN101171538A - Method and device for determining the position of a core in an optical fiber - Google Patents
Method and device for determining the position of a core in an optical fiber Download PDFInfo
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- CN101171538A CN101171538A CNA2006800152718A CN200680015271A CN101171538A CN 101171538 A CN101171538 A CN 101171538A CN A2006800152718 A CNA2006800152718 A CN A2006800152718A CN 200680015271 A CN200680015271 A CN 200680015271A CN 101171538 A CN101171538 A CN 101171538A
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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
- G02B6/2555—Alignment or adjustment devices for aligning prior to splicing
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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
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating means
- G02B6/3801—Permanent connections, i.e. wherein fibres are kept aligned by mechanical means
- G02B6/3803—Adjustment or alignment devices for alignment prior to splicing
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating means
- G02B6/3807—Dismountable connectors, i.e. comprising plugs
- G02B6/3833—Details of mounting fibres in ferrules; Assembly methods; Manufacture
- G02B6/3834—Means for centering or aligning the light guide within the ferrule
- G02B6/3843—Means for centering or aligning the light guide within the ferrule with auxiliary facilities for movably aligning or adjusting the fibre within its ferrule, e.g. measuring position or eccentricity
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optical Couplings Of Light Guides (AREA)
- Mechanical Coupling Of Light Guides (AREA)
Abstract
Disclosed is a core (11) of an optical fiber (10a) for guiding a light mode. Said fiber core (11) is disposed between a light source (20a) and at least one lens (30a) of an optical system. The beams emitted by the light source hit the fiber cladding (14) perpendicular to the longitudinal axis of the optical fiber. The light beams are diffracted inside the fiber cladding by means of stress applying structures (12a, 12b) and the fiber core (11) and are projected onto an image plane (BE1) with the aid of the lens (30a). Said lens (30a) is arranged such that an object plane (OE1) lies between the light source (20a) and the center (Z) of the optical fiber. The position of the fiber core (11) can be determined using a characteristic intensity distribution of the radiation received on the image plane (BE1) by a CCD camera (40a). Especially the position of the core of a polarization-maintaining PANDA-type or bow tie-type optical fiber can be determined by moving the object plane (OE1) to a position located between the center (Z) of the optical fiber and the light source (20a).
Description
The present invention relates to determine the method for the position of fibre core in the optical fiber, and relate to a kind of equipment, can determine the position of fibre core in the optical fiber by this equipment.
Optical cable comprises at least one optical fiber that transmits luminous power.Optical fiber is positioned at the inside of waveguide core (core pipe), and wherein waveguide core is positioned at the core district of optical cable.Stiffening device (strength member) distributes around optical fiber tube usually, and protected seam surrounds.
Accompanying drawing 1A shows optical fiber 10.Optical fiber has the first axis of symmetry S1, and the first axis of symmetry S1 extends along its length at Z place, the center of optical fiber.The second axis of symmetry S2 and the 3rd axis of symmetry S3 pass the cross-sectional area of optical fiber.The second axis of symmetry S2 vertically extends, and the ground that compares, the 3rd axis of symmetry S3 along continuous straight runs extends.Whole 3 axis of symmetry are vertical mutually and crossing at Z place, the center of optical fiber.
Accompanying drawing 1B and 1C illustrate the cross-sectional view of two polarization-maintaining fibers.These two optical fiber have the fibre core 11 that is used to transmit a kind of optical mode.Surround the fibre cladding 14 same light that transmit of fibre core, still have low refraction coefficient.Thereby fibre cladding produces total internal reflection, and therefore guides the optical radiation in the fibre core.
Accompanying drawing 1B shows the polarization-maintaining fiber of so-called PANDA type.With respect to axis of symmetry S2 and S3, on fibre core 11 and below arranged that symmetrically two stress with circle cross-section produce structure (stress applying portion) 12a and 12b.Accompanying drawing 1C illustrates the xsect of the optical fiber that passes so-called Bow Tie type.Bow Tie optical fiber have equally on fibre core 11 and below two stress produce structure 13a and 13b, and arrange them symmetrically with respect to axis of symmetry S2 and S3.Produce structure with stress in the optical fiber of PANDA type and compare, the cross-sectional area that the stress in the Bow Tie optical fiber produces structure is the form of the part of circle.
When producing and lay the cable of optical fiber, the circuit of two cables must be connected to each other usually.In this case, an optical fiber in first optical cable is connected to an optical fiber in second optical cable.The target of connection procedure is that the cross-sectional surface with two cable and damper ends is connected to each other makes that the optical loss that is occurred when light is low as far as possible when an optical fiber is delivered to another optical fiber.A kind of main optical loss reason is the emission light lateral excursion between the fibre core of two optical fiber by the abutment between two optical fiber.The result, when connecting the xsect of two PANDA type optical fiber or two Bow Tie type optical fiber, maybe when connecting PANDA type optical fiber, after engaging process is finished, two fibre cores of optical fiber relative to each other must be aimed at without any skew ground as far as possible to Bow Tie type optical fiber.
Fibre core in two optical fiber that will connect for accurate aligning, it is not enough only the optical fiber edge of two optical fiber relative to each other being aimed at.As the result of manufacturing tolerance, fibre core needn't be positioned at the center of optical fiber.Transmitting nonpolarized light with fundamental transverse mode (fundamental transverse mode) and do not having under the situation of horizontal single-mode fiber that any stress produces structure, with respect to the optical fiber overall diameter, the concentricity of fibre core has the tolerance of 0.1 to 1 μ m magnitude.For the polarization-maintaining fiber of PANDA or Bow Tie type, with respect to the overall diameter of optical fiber, the tolerance of the concentricity of fibre core is compared with horizontal single-mode fiber in the magnitude of 1 μ m, and the polarization-maintaining fiber of PANDA or Bow Tie type comprises stress in addition and produces structure.If two optical fiber only utilize the external fiber edge of optical fiber to aim at and then engage, then can determine: after engaging process, the lateral excursion between two fibre cores of the optical fiber end that connect is 2 μ m nearly.Power loss is less than 0.02dB when two fibre cores of optical fiber are connected to each other without any skew ground, and still when light passed the abutment, any skew between the fibre core caused the extra power loss up to 0.15dB.Therefore, when engaging two optical fiber, expectation be: when before the actual engagement process, relative to each other aiming at the fibre core that will connect, after engaging process, do not have lateral excursion, or skew is as far as possible little at junction point.
Fig. 2 show connect two optical fiber 10 and 10 ' device 100.Device two optical cables 15 of 100 usefulness and 15 ' present.Optical fiber 10 extends along the inside of optical cable 15.Optical fiber 10 ' along optical cable 15 ' inside extend.In order to engage two optical fiber in the optical cable, the insulation of peeling off protective seam, any stiffening device and waveguide core comes out optical fiber.Aim at mutually for the corresponding fibre core that makes two optical fiber, optical fiber 10 is fixed on the fixator 50, and optical fiber 10 ' be fixed on fixator 50 ' on.Fixator can move relative to each other, makes that the fibre core in the inside of two optical fiber can be aligned with each other, makes after connection procedure, and they are connected to each other and without any skew.For instance, use junction apparatus 6 to connect two optical fiber.Except engaging process, can use bonding binding procedure or mechanical fixation that two optical fiber are connected to each other.
In order to aim at two optical fiber, be necessary to understand as far as possible exactly the position of two fibre cores in the inside of optical fibre.Become known for the whole bag of tricks of the position of fibre core in the positioning optical waveguides.In document JP 55-96433, the position of the fibre core of optical fiber is determined according to X ray.In document US 4,690,493 and document GB2, among 110,412 A, use ultraviolet light irradiation optical fiber, and determine the position of fibre core according to the light of being launched.Yet, under the situation of institute's describing method, must use for twice additional source of light to shine optical fiber.
Document US 4,660,972 have proposed a kind of method that is used to from the directional light irradiates light waveguide of two orthogonal directionss.The light beam of refraction and diffraction is detected by optical system in optical fiber, and is applied.The locus of fibre core and/or waveguide can be determined according to the stack from the radiation of the diffraction of two orthogonal directionss and refraction.Yet the use of this method depends on the use of complicated optical system.
According to document US 4,067,651, a kind of method of interferometry is used to determine the degree of eccentricity of fibre core.Shine optical fiber with laser beam.Then, birefringence and diffraction image are analyzed, so that determine the difference of the concentricity of fibre core and fibre cladding.Yet this method needs birefringence/diffraction image to carry out complex analyses.
In document US 4,561, the method for the fibre core of two optical fiber of another kind of aligning has been described in 719.In this method, light is fed in the fibre core of first optical fiber, and the light of the fibre core that injects second optical fiber is detected.Yet, in this method, must provide the equipment that injects light into first optical fiber and export light from second optical fiber.
Document JP 59-219707, JP 60-46509 and JP 60-85350 relate to a kind of method of locating fibre core in the single-mode fiber.In this case, use and the rectangular directional light irradiation of fiber lengths axle optical fiber.The light of diffraction and refraction is fed to the optical system of the intensity distributions of the power density that produces radiation in optical fiber.Intensity distributions (intensity profile) has minimum value and maximal value, can determine the position of fibre core according to its position in intensity distributions.Yet, especially, can not make in this way at the polarization-maintaining fiber of PANDA type, because producing structure, stress in intensity distributions, produces other minimum value and maximal value.
According to document US 4,825,092, by the following method, two optical fiber are relative to each other aimed at:, then locate the position of fibre core according to the profile in diffraction that is write down and the refraction image at first to shine two optical fiber with the rectangular light of fiber length.Because stress generation structure makes the important soft edge in the fibre core, so this method can not directly apply to the polarization-maintaining fiber of PANDA and Bow Tie type.
Document US 4,882,497 and EP 0256539 relate to a kind of method of degree of eccentricity of the fibre core that can determine optical fiber.For this reason, use from shining optical fiber with the rectangular light source of fiber lengths axle.Can determine the degree of eccentricity of fibre core according to the intensity distributions of the radiation of diffraction that writes down later at optical fiber and refraction image.In this case, especially will consider what is called " lens effect ", this effect is owing to fibre core takes place with the different refraction coefficient of fibre cladding.Yet, because stress produces structure, when checking " PANDA " optical fiber and " Bow Tie " optical fiber, this " lens effect " also can occur, and these effects especially depend on the orientation with these structures of the directional correlation of incident beam.
The modern comfort of carrying out welding (fusion) or engaging process utilizes two kinds of methods, so that the fibre core of two optical fiber that will connect is aimed at.A kind of method is that light is fed in the fibre core of first optical fiber, and the light in the fibre core that is fed to second optical fiber is detected.Yet,,, or be used under the situation that does not have big relatively complexity, connecting polarization-maintaining fiber so this method can not be used for the welding junction apparatus because optical fiber must rotate in the welding junction apparatus during the engaging process.As a result, optical system must with the rotation of optical fiber coupling so that light is fed to first optical fiber and the light that is injected into second optical fiber is detected.
In the second approach, use from the rayed optical fiber of rectangular two different directions of the length direction of optical fiber.The position of fibre core or the degree of eccentricity of fibre core can determine according to the intensity distributions of radiation, wherein radiation when light passes optical fiber along two orthogonal direction diffraction.In this case, object plane (object plane) scioptics system goes up imaging in image planes (image plane), and the intensity distributions of radiation on the image planes is assessed.In this case, object plane is usually located between the center and lens combination of optical fiber.Especially under the situation of single-mode fiber, the profile at external fiber edge and the profile of fibre core can distribute according to the characteristic of the intensity distributions of the power density of radiation on the image planes and determine with high accuracy.Yet, compare with single-mode fiber, owing to be subjected to the characteristic of the structure control of fibre core to be distributed in the interference that is subjected to the stress in the fibre cladding to produce structure in the intensity distributions of the radiation that is received, so the fibre core of the polarization-maintaining fiber of PANDA and Bow Tie type only can be determined deficiently.
Therefore, the purpose of this invention is to provide a kind of method, can determine the position of the fibre core in the optical fiber (the especially polarization-maintaining fiber of PANDA or Bow Tie type) by this method as far as possible exactly.Another object of the present invention provides a kind of equipment, can determine the position of the fibre core in the optical fiber (the especially polarization-maintaining fiber of PANDA or Bow Tie type) as far as possible exactly by this equipment.
Purpose about the method for the position of determining the fibre core in the optical fiber realizes in the following manner: for the optical fiber with the fibre core that is used to transmit a kind of optical mode is provided, described optical fiber has first axis of symmetry and the second and the 3rd axis of symmetry, the center extension that first axis of symmetry passes optical fiber along the length direction of optical fiber, the second and the 3rd axis of symmetry extends along the center that is horizontally through optical fiber of optical fiber separately.First, second and the 3rd axis of symmetry are each other in the right angle.In addition, a kind of optical system can be provided, this optical system can have light source, on the image planes at least one lens of object plane imaging be used to detect the equipment of the intensity distributions of the radiation that on image planes, receives, wherein object plane extends in the approximate mode that is parallel to the second and the 3rd axis of symmetry.Lens are arranged at light source and are used to detect between the equipment of the intensity distributions of the radiation that receives on the image planes.Optical fiber is arranged between light source and the lens.Then light source is activated, so that launch light beam on the direction of optical fiber.According to the present invention, lens are moved, make the object plane of lens between the second and/or the 3rd axis of symmetry of light source and optical fiber.Therefore, object plane is between the practical center and light source of optical fiber.Then detect the intensity distributions of the radiation that receives on image planes, wherein on the light path of light source, optical fiber produces a plurality of minimum value and the maximal value of the intensity distributions of the radiation that is received.Then, according to minimum value in the intensity distributions of the radiation that is received and peaked position, can on the direction of the second and/or the 3rd axis of symmetry, determine the position of the fibre core of optical fiber.
Especially, the position based on the fibre core in the optical fiber of feasible definite PANDA of method of the present invention or Bow Tie type becomes possibility.Such optical fiber have on fibre core and below first and second stress produce structure.Under the situation of the optical fiber of PANDA type, first and second stress produce structure and all have circle cross-section.Under the situation of the optical fiber of Bow Tie type, the xsect that first and second stress produce structure is the form of round part.
In the intensity distributions that is write down of the radiation that receives on image planes, fibre core produces first minimum value, and they are between first and second maximal values.Thereby locate according to the position and the first and second peaked positions of first minimum value position of fibre core.When adjusting lens and make object plane between the center of optical fiber and light source, stress produces structure and does not disturb in the intensity distributions of the radiation that is received this distribution as the characteristic of fibre core.
The method according to this invention makes the position of determining the fibre core of directions X and Y direction on the direction of the second and the 3rd axis of symmetry exactly become possibility.According to an embodiment of this method, optical system has the form that is assembled into the feasible system that can rotate about first axis of symmetry of optical fiber for this reason.Optical system is rotated on first direction, and first and second axis of symmetry that make light beam from light source be aligned to optical fiber meet at right angles approx.Then, mobile lens makes the object plane of lens between the light source and second axis of symmetry.When optical system in this way on time, according to minimum value in the intensity distributions of the radiation that on image planes, is received and peaked position, can determine the position of fibre core on the second axis of symmetry direction of optical fiber.
Then, rotate optical system on second direction, the first and the 3rd axis of symmetry that makes light beam from light source be aligned to optical fiber meets at right angles approx.Then, mobile lens makes the object plane of lens between light source and the 3rd axis of symmetry.Thereby, optical system be positioned at the rectangular direction of first direction on.This position can be used as the basis of the position of fibre core on the 3rd axis of symmetry direction of determining optical fiber according to the minimum value in the intensity distributions of the radiation that received and peaked position on image planes.
Another possibility mode of determining the position of the fibre core in the optical fiber comprises: according to the present invention, rotate optical fiber rather than optical system about first axis of symmetry, make it to arrange on two orthogonal directions with respect to optical system.For this reason, at first rotate optical fiber between light source and lens on first direction, first and second axis of symmetry that make light beam from light source be aligned to optical fiber meet at right angles approx.Then, mobile lens makes the object plane of lens between the light source and second axis of symmetry.In this position,, can on the direction of second axis of symmetry, determine the position of the fibre core of optical fiber according to minimum value in the intensity distributions of the radiation that on image planes, receives and peaked position.
Then rotate optical fiber between light source and lens on second direction, the first and the 3rd axis of symmetry that makes light beam from light source be aligned to optical fiber meets at right angles approx.Then, mobile lens makes the object plane of lens between light source and the 3rd axis of symmetry.Then, in this position,, can on the direction of the 3rd axis of symmetry, determine the position of the fibre core of optical fiber according to minimum value in the intensity distributions of the radiation that on image planes, receives and peaked position.
Determine that fibre core another possibility mode in the position of two mutually perpendicular directions in the optical fiber provide first and second optical systems.Two optical systems respectively have light source, on the image planes at least one lens of object plane imaging and the equipment that is used to detect the intensity distributions of the radiation that on image planes, receives, wherein object plane extends to be similar to the mode that is parallel to the second or the 3rd axis of symmetry.Lens are arranged at light source and are used to detect between the equipment of intensity distributions of the radiation that is received.Aim at first optical system, first and second axis of symmetry that make light beam from the light source of first optical system be aligned to optical fiber meet at right angles approx.Aim at second optical system, the first and the 3rd axis of symmetry that makes light beam from the light source of second optical system be aligned to optical fiber meets at right angles approx.Move the lens in first optical system, make the object plane of these lens between second axis of symmetry of light source and optical fiber.Then, according to minimum value in the intensity distributions of the radiation that on image planes, receives and peaked position, can on the direction of second axis of symmetry, determine the position of the fibre core of optical fiber.Then, move the lens of second optical system, make the object plane of these lens between the 3rd axis of symmetry of the light source of second optical system and optical fiber.Then, according to minimum value in the intensity distributions of the radiation that on image planes, receives and peaked position, can on the direction of the 3rd axis of symmetry, determine the position of the fibre core of optical fiber.
Second fixator that a kind of extension of method of position that is used for determining the fibre core of optical fiber is to use first fixator that is used for fixing first optical fiber and use to be used for fixing second optical fiber.First optical fiber is aligned in first fixator, and the ground that compares, second optical fiber is aligned in second fixator.Two optical fiber is aligned in first and second fixators according to the position of the corresponding fibre core of first and second optical fiber of determining respectively, make first and second optical fiber corresponding fibre core without any skew ground relatively, or have and specify Offsets.
In case two fibre cores are aimed in this way relative to each other, then can carry out engaging process so that connect first and second optical fiber.
The equipment of the position that is used for definite optical fiber fibre core is described hereinafter.Equipment according to the present invention has fixator, be used for fixing optical fiber with the fibre core that transmits a kind of optical mode, wherein this optical fiber has first axis of symmetry, first axis of symmetry passes the center extension of optical fiber along the length direction of optical fiber, and have the second and the 3rd axis of symmetry, the second and the 3rd axis of symmetry extends along the center that is horizontally through optical fiber of optical fiber separately.First, second and the 3rd axis of symmetry are each other in the right angle.In addition, provide at least one optical system, this optical system has: at least one lens of object plane imaging, wherein object plane extends in the mode that is parallel to the second or the 3rd axis of symmetry approx on image planes; Be used for producing the light source of light path in the lens direction; And the equipment that is used to detect the intensity distributions of the radiation that on image planes, receives.Lens are arranged to make that it can be at light source and be used to detect between the equipment of intensity distributions of the radiation that is received and move.The fixator that is used for fixing optical fiber can move, and the feasible optical fiber that is fixed in the fixator is moved to the light path of light source.Lens can move, and make object plane between the second and/or the 3rd axis of symmetry and light source of optical fiber, and therefore between the center and light source of optical fiber.
Another embodiment according to the equipment of the position that is used for determining fibre core, optical system is installed, make it to rotate about first axis of symmetry of optical fiber, make it possible to relative optical fiber align optical system, make to be met at right angles with second axis of symmetry by being aligned to alternatively or to meet at right angles with the 3rd axis of symmetry of optical fiber from the light beam of light source.
Another option according to the embodiment of the equipment of the position that is used for determining fibre core of the present invention provides the fixator that is used for fixing optical fiber, and this fixator is the form that is installed into the fixator that can rotate about first axis of symmetry of optical fiber.This permission is aimed at optical fiber with respect to optical system, makes light beam from light source be aligned to alternatively with second axis of symmetry and meets at right angles, or meet at right angles with the 3rd axis of symmetry of optical fiber.
Another improvement of equipment of position that is used for determining the fibre core of optical fiber provides the use to first optical system, first optical system has: at least one lens of object plane imaging, wherein object plane is with every extension of second axis of symmetry that is parallel to optical fiber approx on image planes; On the direction of the lens of first optical system, produce the light source of light path; Equipment with the intensity distributions that is used to detect the radiation that on image planes, receives.Light source in first optical system and being used for detects the lens of arranging between the equipment of first optical system of intensity distributions of the radiation that is received in first optical system.In addition, provide second optical system.This comprises: at least one lens of object plane imaging, wherein object plane extends in the mode of the 3rd axis of symmetry that is parallel to optical fiber approx on image planes; Be used to detect the light source of the light path on the direction of the lens of second optical system; Equipment with the intensity distributions that is used to detect the radiation that on image planes, receives.Light source in second optical system and being used for detects the lens of arranging between the equipment of second optical system of intensity distributions of the radiation that is received in second optical system.Being fixed on optical fiber in the fixator can be moved on the light path between the respective lens of the respective sources of first and second optical systems and first and second optical systems.With respect to optical fiber align first optical system, making meets at right angles approx from the light beam of the light source of first optical system and second axis of symmetry is mapped to optical fiber.With respect to optical fiber align second optical system, making meets at right angles approx from the light beam of the light source of second optical system and the 3rd axis of symmetry is mapped to optical fiber.
Can find in the dependent claims according to other embodiment of the method for the position of the fibre core that is used for determining optical fiber of the present invention and according to other embodiment of the equipment of the position of the fibre core that is used for determining optical fiber of the present invention.
To explain in greater detail with reference to the attached drawings that hereinafter the present invention, accompanying drawing illustrate exemplary embodiment of the present invention, and wherein:
Accompanying drawing 1A illustrates the optical fiber of length direction,
Accompanying drawing 1B illustrates the xsect by the optical fiber of so-called PANDA type,
Accompanying drawing 1C illustrates the xsect by the optical fiber of Bow Tie type,
Fig. 2 illustrates the equipment that is used to connect two optical fiber,
Fig. 3 illustrates the equipment according to the position of the fibre core that is used for determining optical fiber of the present invention,
Fig. 4 A, 4B illustrate the embodiment of the equipment of the intensity distributions that is used to detect radiation,
Fig. 5 illustrates by the light path according to the equipment of the position of the fibre core that is used for determining optical fiber of the present invention,
Accompanying drawing 6A illustrates and the meet at right angles intensity distributions of the radiation that is received that is mapped to optical fiber of second axis of symmetry,
Accompanying drawing 6B illustrates and the meet at right angles intensity distributions of the radiation that is received that is mapped to optical fiber of the 3rd axis of symmetry,
Fig. 7 A is illustrated in object plane between the center of optical fiber and lens the time and the meet at right angles intensity distributions of the radiation that is received that is mapped to PANDA type optical fiber of second axis of symmetry,
Fig. 7 B is illustrated in object plane according to the present invention between the center of optical fiber and light source the time and the meet at right angles intensity distributions of the radiation that is received that is mapped to PANDA type optical fiber of second axis of symmetry,
Fig. 8 A is illustrated in object plane between the center of optical fiber and lens the time and the meet at right angles intensity distributions of the radiation that is mapped to PANDA type optical fiber of the 3rd axis of symmetry,
Fig. 8 B is illustrated in object plane according to the present invention between the center of optical fiber and light source the time and the meet at right angles intensity distributions of the radiation that is mapped to PANDA type optical fiber of the 3rd axis of symmetry,
Accompanying drawing 9A-11C illustrates by means of the simulation calculation of ray tracing method to the intensity distributions of the radiation that is received that is mapped to " PANDA " type optical fiber,
The equipment that Figure 12 illustrates the position of the corresponding fibre core that is used for determining two optical fiber according to one embodiment of present invention connects the equipment of the fibre core of two optical fiber,
Accompanying drawing 13A-13B illustrates the aligning that two optical fiber is carried out according to the present invention is based on the respective center of optical fiber and the skew between the corresponding fibre core,
Figure 14 illustrates the aligning of the fibre core of optical fiber with respect to laser instrument.
Fig. 3 illustrates the equipment of position of the fibre core of the optical fiber that is used for determining the PANDA type.Except being used to transmit the fibre core 11 of optical mode, the optical fiber of PANDA type also has stress and produces structure 12a and 12b.The equipment that is used for the position of definite fibre core 11 has two optical systems, and described two optical systems are aligned to each other in the right angle.
First optical system comprises light source 20a, and light source 20a is along direction RS2 emitting parallel light, and the axis of symmetry S1 on the length direction of direction RS2 and optical fiber meets at right angles, and S2 meets at right angles with axis of symmetry, and is parallel to the axis of symmetry S3 of optical fiber.According to the present invention, adjust the lens 30a in first optical system, make object plane OE1 between the center or axis of symmetry S2 and light source 20a of optical fiber.After passing the inner structure of optical fiber, light beam is incident upon on the image planes BE1 by lens 30a.The equipment 40a of the intensity distributions of the radiation that is used to write down on the image planes and is received is positioned at the image planes BE1 of lens 30a.
Second optical system comprises light source 20b, lens 30b and is used to write down the equipment 40b of the intensity distributions of the radiation that is received on the image planes BE2.Second optical system is along direction RS3 emission light beam, and direction RS3 and axis of symmetry S1 meet at right angles, and are parallel to axis of symmetry S2, and meets at right angles with the axis of symmetry S3 of optical fiber.After passing the inner structure of optical fiber, light beam is incident upon on the image planes BE2 by lens 30b.According to the present invention, adjust lens 30b, make object plane OE2 between the center or axis of symmetry S3 and light source 20b of optical fiber.The equipment 40b of intensity distributions that is used to detect the power density of radiation is positioned at image planes BE2.
The equipment 40a and the 40b that are used to detect the intensity distributions of the radiation that is received can be the forms of CCD camera.Fig. 4 A and 4B illustrate may the implementing of CCD camera of the intensity distributions of the power density that is used to write down the radiation on the image planes.In a simple embodiment, CCD camera 40a or 40b have single-row 41 of CCD unit C.Among graphic another embodiment, the CCD camera has the cell array of being made up of the row and column of CCD unit C in Fig. 4 B.Because being parallel to axis of symmetry S2 by the intensity distributions of camera 40a record assesses, assess and be parallel to axis of symmetry S3 by the intensity distributions that CCD camera 40b writes down, so, next average along the axis of symmetry S1 of the length direction of optical fiber by the radiated power level that each the CCD unit in delegation or the row is write down.Also can use camera rather than CCD camera with analog form (analogously) work.
Fig. 5 illustrates with respect to the optical fiber 10a of PANDA type and aims at light path from the light beam of the light source 20a of first optical system.From light source 20a emission, with the rectangular directional light of axis of symmetry S2 of the optical fiber structure by inside of optical fibre along different directions diffraction and refraction.Lens 30a forms object plane OE1 on image planes BE1.According to the present invention, mobile lens 30a makes object plane OE1 between the center or axis of symmetry S2 of light source 20a and optical fiber in this case.
Accompanying drawing 6A illustrates 0 to 255 grey value profile by the CCD element of camera 40a record.Grey value profile corresponding to the intensity distributions of the radiation that is received is represented as along the pixel in the camera row of axis of symmetry S2 direction.In order to improve diagram, the position of pixel 0 to 200 is shown along the direction of the camera row of CCD camera 40a among Fig. 5.From the light beam of light source 20a in the camera row pixel 0 and the some place of pixel 200 be mapped to image planes, and do not pass optical fiber.What produce minimum value MIN 2 and minimum value MIN 3 in the intensity distributions of the radiation that optical fiber edge R1 and R2 receive at pixel 25 and 190 places falls distribution suddenly.These 2 bare minimums in the intensity distributions are represented the perimeter of optical fiber.Passing after stress produces structure, pixel 90 on image planes and 140 places produce maximal value MAX3 and MAX4, and maximal value MAX3 and MAX4 represent that the optical fiber internal stress produces the position of structure 12a and 12b.Produce minimum value MIN 1 and two maximal value MAX1 and MAX2 among the middle section D11 of the grey value profile of fibre core 11 between location of pixels 100 and 130 of optical fiber.Therefore, can according to shown in accompanying drawing 6A, be mapped to the grey value profile of radiation of image planes BE1 or intensity distributions and determine optical fiber and its inner structure position along axis of symmetry S2.
Accompanying drawing 6B illustrates the intensity distributions of the radiation that is mapped to image planes BE2.In this case, two global minimum MIN2 ' and MIN3 ' that the perimeter of expression optical fiber also occurs.Position by maximal value MAX3 ' and MAX4 ' expression stress generation structure.The fibre core of optical fiber produces maximal value MAX1 ' and MAX2 ' in the middle section D11 of grey value profile, between be minimum value MIN 1 '.According to shown in accompanying drawing 6B, be mapped to the grey value profile or the intensity distributions of the radiation of image planes BE2, can determine optical fiber and its structural detail especially its fibre core along the position of axis of symmetry S3.
Therefore can use the grey value profile that is write down to adjust the lens of optical system and the optical fiber between the light source, especially the optical fiber of PANDA or Bow Tie type, make optical fiber or fibre core the camera of camera 40a/ camera 40b capable/the specified pixel zone of camera row between.In corresponding manner, also can between lens and light source, adjust two optical fiber, make its fibre core relatively, or have the skew of qualification, so that carry out follow-up engaging process without any skew ground.
In order to carry out engaging process, must be in vertical direction along axis of symmetry S2 and in the horizontal direction upper edge axis of symmetry S3 aim at two optical fiber.For this reason, must on two mutually perpendicular directions, write down two grey value profile.A kind of selection provides two optical systems, and is graphic as Fig. 4 institute, and it is arranged by rectangular mode each other.Another selection provides single optical system, and this optical system is installed into and can rotates about the axis of symmetry of the length direction of optical fiber.In addition, can adjust the optical system that to fix, and as an alternative, can rotate optical fiber about the length axle (being axis of symmetry S1) of optical fiber.For this reason, for instance, as shown in Figure 2, fiber arrangement in fixator 50, is assembled into it can rotate.This feasible length axle about optical fiber rotates optical fiber becomes possibility.
Fig. 7 A illustrates the distribution of the gray-scale value of the radiation that is mapped to the image planes BE1 among Fig. 3 when object plane is between the center of optical fiber or the lens in axis of symmetry S2 and the optical system.Shine optical fiber with the light beam that is parallel to axis of symmetry S3 in this case.Accompanying drawing 7B illustrates when adjusting lens 30a and makes according to the present invention the distribution of when aiming at object plane OE1 between center or axis of symmetry S2 and the light source 20a gray-scale value on the image planes BE1.Be arranged to from the radiation of light source 20a and be parallel to axis of symmetry S3 and meet at right angles with axis of symmetry S2.Compare with the zone of fibre core among Fig. 7 A, the grey value profile shown in the accompanying drawing 7B has two maximal values and a minimum value in the zone of fibre core.Therefore, use the grey value profile shown in the accompanying drawing 7B to come the fibre core of positioning optical waveguides to be better than using the distribution of the gray-scale value shown in Fig. 7 A to be located greatly.
Show the distribution of gray-scale value that is mapped to the radiation of image planes BE1 when optical fiber with the inclination angles of+/-10 degree when rotating with respect to axis of symmetry S2 by the distribution shown in dotted line among Fig. 7 A and the 7B/imaginary point line.Therefore, the curve distribution of dotted line/imaginary point line shows the distribution of the gray-scale value of the radiation that is mapped to image planes BE1 when not arranging stress generation structure symmetrically with respect to axis of symmetry S2.Opposite with Fig. 7 A, the distribution of the gray-scale value among the accompanying drawing 7B only is subjected to the influence that stress produces the position of structure slightly.
Accompanying drawing 8A shows when object plane OE2 rotates between the center of lens and optical fiber or axis of symmetry S3 and be parallel to axis of symmetry S2 and launch light beam with axis of symmetry S3 with meeting at right angles, is mapped to the distribution of the gray-scale value of the radiation of image planes BE2 among Fig. 3.Accompanying drawing 8B shows as object plane OE2 and between the center of light source and optical fiber or axis of symmetry S3 and when being parallel to axis of symmetry S2 and launching light beam with axis of symmetry S3 with meeting at right angles, is mapped to the distribution of the gray-scale value of the radiation of image planes BE2 among Fig. 3 according to the present invention.In this case, the distribution that also is shown clearly in the gray-scale value that uses accompanying drawing 8B determines that the fibre core of optical fiber is better than using the grey value profile among Fig. 8 A.In accompanying drawing 8A, fibre core 11 only produces a maximal value, and the ground that compares produces two maximal values in accompanying drawing 8B.
Show the distribution of gray-scale value that is mapped to the radiation of image planes BE2 when optical fiber with+/-10 ° inclination angle when rotating with respect to axis of symmetry S2 by the distribution shown in the dotted line among accompanying drawing 8A and the 8B/imaginary point line.The distribution of dotted line/imaginary point line be shown clearly in stress produce structure almost to the distribution of the grey value profile in the core region of optical fiber without any influence.
Accompanying drawing 9A to 9E show when adjust lens make object plane between lens and light source the each point place and when being parallel to axis of symmetry S3 and launching light beam with meeting at right angles, based on the distribution of the gray-scale value of the radiation on the image planes that calculate of use ray trace program with axis of symmetry S2.In Fig. 9 A and 9B, object plane is between the center and lens of optical fiber.Accompanying drawing 9C shows the distribution of the gray-scale value of the radiation that is mapped to image planes when object plane is positioned at the center of optical fiber.Accompanying drawing 9D and 9E show the distribution that is mapped to the radiation of image planes when object plane is between the center of optical fiber and light source.To relatively being shown clearly in of accompanying drawing produce among maximal value that maximal value that structure causes and zone by fibre core cause and Fig. 9 A and the 9B by stress among accompanying drawing 9D and the 9E and compare and can distinguish more significantly.Thereby when object plane was between the center of optical fiber and light source, the slight variation that stress produces the position of structure had more unconspicuous influence to the position of the fibre core of optical fiber.
Accompanying drawing 10A shows when object plane is disposed between the center of optical fiber and the lens and be parallel to axis of symmetry S3 and launch light beam with axis of symmetry S2 with meeting at right angles to 10C, the distribution of the radiation that is mapped to image planes that emulation obtains according to ray trace.Accompanying drawing 10A show when optical fiber relatively and the turn left grey value profile of the radiation on the image planes 10 ° time of axis of symmetry S2.Accompanying drawing 10B shows when optical fiber does not rotate with respect to axis of symmetry S2 and S3 and the grey value profile on the image planes when arranging stress generation structure symmetrically with respect to axis of symmetry S2 and S3.Accompanying drawing 10C show when optical fiber with respect to the turn right distribution of gray-scale value of the radiation that is mapped to image planes 10 ° time of axis of symmetry S2.Situation shown in accompanying drawing 10A and the 10C is equivalent to not arrange symmetrically that with respect to axis of symmetry S2 stress produces structure.
Accompanying drawing 11A shows when adjusting lens to 11C and makes object plane between the center of optical fiber and light source and when being parallel to axis of symmetry S3 and launch light beam with axis of symmetry S2 with meeting at right angles, uses ray trace to calculate the distribution of the gray-scale value on the next definite image planes.Accompanying drawing 11A shows when the optical fiber grey value profile on the image planes 10 ° time that turns left with respect to axis of symmetry S2.Accompanying drawing 11B shows when optical fiber does not rotate with respect to axis of symmetry S2 and S3 and the grey value profile on the image planes when arranging stress generation structure symmetrically with respect to axis of symmetry S2 and S3.Accompanying drawing 11C show when optical fiber with respect to the turn right distribution of gray-scale value of the radiation that is mapped to image planes 10 ° time of axis of symmetry S2.Graphic situation is equivalent to not arrange symmetrically that with respect to axis of symmetry S2 stress produces structure among accompanying drawing 11A and the 11C.
10A compares to 10C with accompanying drawing, and accompanying drawing 11A does not indicate when optical fiber to 11C and rotates with respect to axis of symmetry S2+any variation of grey value profile/-10 ° the time in the zone of the fibre core of optical fiber.Again, this has been shown clearly in when object plane is disposed between the center of optical fiber and the light source, and the asymmetric arrangement slightly that stress produces structure has more unconspicuous influence to the grey value profile of the radiation that is mapped to image planes.
Figure 12 show be used to connect optical fiber 10 and optical fiber 10 ' device 100.These two optical fiber be fixed on fixator 50 and fixator 50 ' in.According to the present invention,, provide first optical system that comprises light source 20, lens 30 and CCD camera 40 in order to adjust fibre core 11.According to the present invention, for adjust fibre core 11 ', provide comprise light source 20 ', lens 30 ' and CCD camera 40 ' second optical system.In this case, can adjust lens 30 and 30 ', make object plane in the respective center and the zone between the respective sources in the optical system of optical fiber.In case, then can suitably aim at two optical fiber at follow-up connection procedure according to having determined the position of corresponding fibre core by CCD the camera 40 and 40 ' grey value profile of record.
Accompanying drawing 13A and 13B show two cross-sectional views of optical fiber.In accompanying drawing 13A, fibre core 11 has been moved side-play amount O1 with respect to the center Z of optical fiber.Compare, in accompanying drawing 13B, fibre core 11 ' be positioned at exactly optical fiber 10 ' center Z ' locate.Therefore, center Z ' and fibre core 11 ' the position between side-play amount O2 be approximately zero.According to the distribution of the gray-scale value of the radiation that is mapped to image planes, the maximal value MAX1 shown in 6A and the 6B, MAX1 ' and MAX2, MAX2 ' and minimum value MIN 1, MIN1 ' determine the side-play amount O1 between center Z and the fibre core 11 with reference to the accompanying drawings.The position of center Z can determine according to optical fiber edge R1 and R2, and optical fiber edge R1 and R2 are created in minimum value MIN 2, MIN2 ' and MIN3, the MIN3 ' in the distribution of the gray-scale value on the image planes.Also can determine side-play amount O1 according to the position of fibre core 11 and center Z.
By identical mode, the position of center Z ' can be determined according to the known location of optical fiber edge R1 ' and R2 '.Fibre core 11 ' the position can be according to determining from two maximal value MAX1, MAX1 ' of the distribution of the gray-scale value on the image planes and MAX2, MAX2 ' and minimum value MIN 1, MIN1 '.This makes it possible to aim at two optical fiber according to the position at the optical fiber edge of determining respectively and the difference of O1 and O2 at follow-up connection procedure.
Figure 14 shows and uses another selection of the present invention.Make laser instrument L directly to be injected into laser emission in the fibre core 11 by mobile fixator 50,, aim at optical fiber according to the position of the fibre core 11 of the optical fiber of can high precision determining 10.By identical mode, also can use other light source or other optical unit (for example optical modulator) to aim at optical fiber 10 or fibre core 11.
Reference numerals list
The 10a polarization keeps optical fiber (PANDA type)
The 10b polarization keeps optical fiber (Bow Tie type)
11 fibre cores
The stress of 12a, 12b optical fiber (PANDA type) produces structure
The stress of 13a, 13b optical fiber (Bow Tie type) produces structure
14 fibre claddings
20 light sources
30 lens systems
40 cameras
41 CCD cameras row
42 CCD cell arrays
50 fixators
60 junction apparatus
100 connect the equipment of two optical fiber
The BE image planes
C CCD unit
The zone of D11 fibre core
The L laser instrument
The MAX maximal value
The MIN minimum value
The OE object plane
The S axis of symmetry
The center of Z optical fiber
Claims (19)
1. the method for the position of a fibre core that is used for determining optical fiber comprises the following steps:
-at least one optical fiber (10a) is provided, this at least one optical fiber (10a) has the fibre core (11) that is used to transmit at least a optical mode, have first axis of symmetry (S1) and the second and the 3rd axis of symmetry (S2, S3), this first axis of symmetry (S1) extends along the center (Z) that the length direction of optical fiber passes optical fiber, and (S2 S3) extends along the center that is horizontally through optical fiber (Z) of optical fiber the described second and the 3rd axis of symmetry separately, wherein said first, second and the 3rd axis of symmetry are each other in extending squarely
-at least one optical system is provided, this at least one optical system has: light source (20a, 20b); Image planes (BE1, BE2) go up to object plane (OE1, OE2) at least one lens of imaging (30a, 30b), (OE1 OE2) approximately is parallel to the described second and the 3rd axis of symmetry (S2 S3) extends wherein said object plane; And be used for detecting at image planes (BE1, the equipment of the intensity distributions of the radiation that is received BE2) (40a, 40b), wherein said lens (30a, 30b) be arranged at described light source (20a, 20b) and be used for detecting at image planes (BE1, the equipment (40a of the intensity distributions of the radiation that is received on BE2), 40b)
-described optical fiber (10a) is arranged between described light source (20a) and the described lens (30a),
-activate described light source (20a, 20b) so that on the direction of described optical fiber (10a), launch light beam,
-arrange described lens (30a, 30b), make described lens object plane (OE1, OE2) be positioned at described light source (20a, 20b) with the second and/or the 3rd axis of symmetry of described optical fiber (S2, S3) between,
-detect image planes (BE1, the intensity distributions of the radiation that is received on BE2), wherein said optical fiber be created in described light source (20a, a plurality of minimum value and maximal value in the intensity distributions of the radiation that is received in light path 20b),
-according to minimum value in the intensity distributions of the radiation that is received and peaked position, the fibre core (11) of determining described optical fiber is in the described second and/or the 3rd axis of symmetry (S2, the position on direction S3).
2. the method for claim 1 comprises the following steps:
-detect at image planes (BE1, the intensity distributions of the radiation that is received BE2), first minimum value (MIN1) in the intensity distributions of the radiation that wherein said fibre core (11) generation is received, wherein said minimum value (MIN1) is positioned at the first and second maximal value (MAX1, MAX2) between
-according to the position and the described first and second maximal values (MAX1 of described first minimum value (MIN1) in the intensity distributions of the radiation that is received, MAX2) position, the fibre core (11) of determining described optical fiber is in the described second and/or the 3rd axis of symmetry (S2, S3) position on the direction.
3. method as claimed in claim 2 comprises the following steps:
-provide optical fiber (10a), this optical fiber comprise at least one first and second stress produce structure (12a, 12b),
-detect at image planes (BE1, the intensity distributions of the radiation that is received BE2), wherein said first stress produces in the intensity distributions that structure (12a) produces the radiation that is received except the 3rd maximal value (MAX3) first maximal value (MAX1) on first optical fiber edge (R1) direction of described optical fiber, and produces except the 4th maximal value (MAX4) second maximal value (MAX2) on second optical fiber edge (R2) direction of described optical fiber.
4. method as claimed in claim 3 comprises the following steps:
Optical fiber (10a) is provided, and wherein said first and second stress produce structure, and (12a 12b) has round xsect separately.
5. method as claimed in claim 3 comprises the following steps:
Optical fiber (10b) is provided, and wherein said first and second stress produce structure, and (13a 13b) has the xsect of the form of round part separately.
6. as each described method in the claim 1 to 5, comprise the following steps:
-described optical system is provided, as being installed into the system that can rotate about first axis of symmetry (S1) of described optical fiber (10a),
-go up to rotate described optical system at first direction (RS2), make light beam from described light source (20a) be aligned to first and second axis of symmetry of described optical fiber (S1 S2) meets at right angles approx,
-arrange described lens (30a), make the object plane (OE1) of described lens be positioned between described light source (20a) and described second axis of symmetry (S2),
-according to minimum value and peaked position in the intensity distributions of the radiation that on image planes (BE1), is received, determine the position of fibre core (11) on described second axis of symmetry (S2) direction of described optical fiber,
-go up to rotate described optical system in second direction (RS3), make light beam from described light source (20a) be aligned to the first and the 3rd axis of symmetry of described optical fiber (S1 S3) meets at right angles approx,
-arrange described lens (30a), make the object plane (OE2) of described lens be positioned between described light source (20a) and the 3rd axis of symmetry (S3),
-according to minimum value and peaked position in the intensity distributions of the radiation that on image planes (BE2), is received, determine the position of fibre core (11) on the 3rd axis of symmetry (S3) direction of described optical fiber.
7. as each described method in the claim 1 to 5, comprise the following steps:
-between described light source (20a) and described lens (30a), go up to rotate described optical fiber (10a) at first direction (RS2), make light beam from described light source (20a) be aligned to first and second axis of symmetry of described optical fiber (S1 S2) meets at right angles approx,
-arrange described lens (30a), make the object plane (OE1) of described lens be positioned between described light source (20a) and described second axis of symmetry (S2),
-according to minimum value and peaked position in the intensity distributions of the radiation that on image planes (BE1), is received, determine the position of fibre core (11) on described second axis of symmetry (S2) direction of described optical fiber,
-between described light source (20a) and described lens (30a), on second direction, rotate described optical fiber (10a), make light beam from described light source (20a) be aligned to the first and the 3rd axis of symmetry of described optical fiber (S1 S3) meets at right angles approx,
-arrange described lens (30a), make the object plane (OE2) of described lens be positioned between described light source (20a) and described the 3rd axis of symmetry (S3),
-according to minimum value and peaked position in the intensity distributions of the radiation that on image planes (BE2), is received, determine the position of fibre core (11) on described the 3rd axis of symmetry (S3) direction of described optical fiber.
8. as each described method in the claim 1 to 5, comprise the following steps:
-first and second optical systems are provided, described first and second optical systems have separately: light source (20a, 20b); Image planes (BE1, BE2) go up to object plane (OE1, OE2) at least one lens of imaging (30a, 30b), (OE1 OE2) approximately is parallel to the described second and the 3rd axis of symmetry (S2 S3) extends wherein said object plane; And be used for detecting at described image planes (BE1, the equipment of the intensity distributions of the radiation that is received BE2) (40a, 40b), wherein said lens (30a, 30b) be arranged at described light source (20a, 20b) and be used to detect the equipment (40a of the intensity distributions of the radiation that is received, 40b), wherein said first optical system is aligned, feasible light beam from the light source (20a) in described first optical system is aligned to the first and second axis of symmetry (S1 with described optical fiber, S2) meet at right angles approx, and wherein said second optical system is designed such that the light beam from the light source (20b) in described second optical system is aligned to the first and the 3rd axis of symmetry (S1 with described optical fiber, S3) meet at right angles approx
-arrange the lens (30a) in described first optical system, make the object plane (OE1) of these lens (30a) be positioned between second axis of symmetry (S2) of described light source (20a) and described optical fiber,
-according to minimum value and peaked position in the intensity distributions of the radiation that on image planes (BE1), is received, determine the position of fibre core on described second axis of symmetry (S2) direction of described optical fiber,
-arrange the lens (30b) of described second optical system, make object plane (OE2) in these lens (30b) be arranged between the 3rd axis of symmetry (S3) of the light source (20b) of described second optical system and described optical fiber,
-according to minimum value and peaked position in the intensity distributions of the radiation that on image planes (BE2), is received, determine the position of fibre core (11) on described the 3rd axis of symmetry (S3) direction of described optical fiber.
9. as each described method in the claim 1 to 8, comprise the following steps:
Aim at the fibre core (11) of described optical fiber (10a) with respect to laser instrument (L), make to be injected in the fibre core (11) of described optical fiber from the radiation of this laser instrument.
10. as each described method in the claim 1 to 8, comprise the following steps:
-first fixator is provided, so that fix first optical fiber (10), and provide second fixator (50 '), so that fix second optical fiber (10 '),
-according to the corresponding fibre core (11 of described first and second optical fiber of determining respectively, 11 ') the position, in described first fixator (50), aim at described first optical fiber (10), and in described second fixator (50 '), aim at described second optical fiber (10 '), make described first and second optical fiber corresponding fibre core without any skew ground relatively, or have and specify Offsets.
11. method as claimed in claim 10 comprises the following steps:
-according to being arranged in described optical fiber at the minimum value that intensity distributions produced of the radiation that is received and the minimum value of peaked fringe region (MIN2, MIN2 ', MIN3, MIN3 ') the optical fiber edge (R1 of described first and second optical fiber (10,10 ') is determined in outermost position, R2, R1 ', R2 ') relevant position
-with respect to the corresponding optical fiber edge of described first and second optical fiber, determine the respective center (Z, Z ') of described first and second optical fiber (10,10 '),
-determine according to the optical fiber edge of described first optical fiber (R1, R2) first difference (O1) between the determined position of the fibre core (11) of determined center (Z) and described first optical fiber,
-determine according to second difference (O2) between the determined position of the fibre core (11 ') of optical fiber edge of described second optical fiber (R1 ', R2 ') determined center (Z ') and described second optical fiber,
-according to the position and the determined respective center (Z at the optical fiber edge of determining respectively at two optical fiber, Z ') with corresponding fibre core (11,11 ') between the described first and second difference (O1, O2), in described first fixator (50), aim at described first optical fiber (10), and in described second fixator (50 '), aim at described second optical fiber (10 '), and make corresponding fibre core relative exactly, or relative with the skew that limits.
12., comprise the following steps: as each described method in claim 10 or 11
Carry out engaging process, so that after aiming at described first and second optical fiber, connect described first and second optical fiber (10,10 ').
13. an equipment that is used for the position of definite optical fiber fibre core,
-this equipment has fixator (50); This fixator (50) is used for fixedly having the optical cable (10) of the fibre core (11) that transmits a kind of optical mode; Wherein optical fiber has first symmetry axis (S1) and the second and the 3rd symmetry axis (S2; S3); Described first symmetry axis (S1) extends along the center (Z) that the length direction of optical fiber passes optical fiber; The described second and the 3rd symmetry axis (S2; S3) extend along the center that is horizontally through optical fiber (Z) of optical fiber separately; Wherein said first, second, and third symmetry axis extends each other in ground, right angle
-this equipment has at least one optical system, this optical system have image planes (BE1, BE2) go up to object plane (OE1, OE2) at least one lens of imaging (30a, 30b), wherein object plane is parallel to the described second and the 3rd axis of symmetry approx and extends; This optical system have lens (30a, produce on direction 30b) light path light source (20a, 20b); And this optical system have be used for detecting image planes (BE1, the equipment of the intensity distributions of the radiation that is received on BE2) (40a, 40b),
-wherein, described lens (30a, 30b be arranged to can described light source (20a, 20b) and be used to detect the intensity distributions of the radiation that is received equipment (40a moves between 40b),
-in this case, can move described fixator (50) so that fixed fiber makes to be fixed on the light path that the optical fiber in the described fixator enters described light source,
-wherein, described lens (30a 30b) can move, make object plane (OE1, OE2) be positioned at described optical fiber the second and/or the 3rd axis of symmetry (S2, S3) with described light source (20a, 20b) between.
14. equipment as claimed in claim 13,
-wherein said optical system is installed into and can rotates about first axis of symmetry (S1) of described optical fiber (10a), make it possible to aim at described optical system, make to be aligned to alternatively that second axis of symmetry (S2) with optical fiber meets at right angles or to meet at right angles with the 3rd axis of symmetry (S3) of optical fiber from the light beam of described light source (20) with respect to optical fiber.
15. equipment as claimed in claim 13,
-described the fixator (50) that wherein is used for fixing optical fiber is installed into and can rotates about first axis of symmetry (S1) of optical fiber, make it possible to adjust optical fiber, make that the light beam of initiating from described light source is aligned to alternatively second axis of symmetry (S2) with optical fiber meets at right angles or meet at right angles with the 3rd axis of symmetry (S3) of optical fiber with respect to described optical system.
16. equipment as claimed in claim 13,
-having first optical system, this first optical system comprises: upward at least one lens (30a) of object plane (OE1) imaging, wherein this object plane is parallel to second axis of symmetry (S2) extension of described optical fiber approx in image planes (BE1); Produce the light source (20a) of light path on the direction of the lens (30a) in described first optical system; With the equipment (40a) of the intensity distributions that is used for detecting the radiation on image planes (BE1), received,
Lens (30a) in-wherein said first optical system are disposed between the equipment (40a) of the intensity distributions that is used to detect the radiation that is received in light source (20a) in described first optical system and described first optical system,
-having second optical system, this second optical system comprises: upward at least one lens (30b) of object plane (OE2) imaging, wherein this object plane is parallel to the 3rd axis of symmetry (S3) extension of described optical fiber approx in image planes (BE2); Produce the light source (20b) of light path on the direction of the lens (30b) in described second optical system; With the equipment (40b) of the intensity distributions that is used for detecting the radiation on image planes (BE2), received,
Lens (30b) in-wherein said second optical system are disposed between the equipment (40b) of the intensity distributions that is used to detect the radiation that is received in the light source (20b) of described second optical system and described second optical system,
-wherein be fixed on optical fiber (10a) in the described fixator (50) can move to the respective sources of described first and second optical systems and the respective lens of described first and second optical systems (30a, 30b) in the light path between,
-wherein said first optical system is aligned with respect to described optical fiber (10a), and feasible light beam and described second axis of symmetry (S2) from the light source (20a) in described first optical system is mapped to described optical fiber (10a) with meeting at right angles approx,
-wherein said second optical system is aligned with respect to described optical fiber (10a), and feasible light beam and described the 3rd axis of symmetry (S3) from the light source (20b) in described second optical system is mapped to described optical fiber (10a) with meeting at right angles approx.
17. as each described equipment in the claim 13 to 16,
The equipment that wherein is used to detect the intensity distributions of the radiation that is received is the form of CCD camera (40a, 40b) with CCD unit (C) single-row (41), or has the form of the CCD camera of the CCD cell array (42) of arranging by row and column.
18. as each described equipment in the claim 13 to 16,
(40a 40b) is the form of analogue camera system wherein to be used to detect the equipment of intensity distributions of the radiation that is received.
19. as each described equipment in the claim 13 to 18,
Wherein (20a, light beam 20b) produces with following wavelength: for this wavelength, (10a is transparent 10b) to optical fiber from described light source.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102005020622A DE102005020622A1 (en) | 2005-05-03 | 2005-05-03 | Method and device for determining the position of a fiber core in an optical fiber |
| DE102005020622.0 | 2005-05-03 |
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| Publication Number | Publication Date |
|---|---|
| CN101171538A true CN101171538A (en) | 2008-04-30 |
| CN100578272C CN100578272C (en) | 2010-01-06 |
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| CN200680015271A Expired - Fee Related CN100578272C (en) | 2005-05-03 | 2006-05-03 | Method for determining the position of a core in an optical fiber |
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| Country | Link |
|---|---|
| CN (1) | CN100578272C (en) |
| DE (1) | DE102005020622A1 (en) |
| WO (1) | WO2006116990A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014134803A1 (en) * | 2013-03-06 | 2014-09-12 | Luo Chunhui | Method and device for detecting fibre position and welding machine having same |
| CN108152010A (en) * | 2012-11-09 | 2018-06-12 | 南安市耀森智能设备有限公司 | A kind of assemble method of fixing device |
| CN109154696A (en) * | 2016-06-29 | 2019-01-04 | 华为技术有限公司 | A kind of multi-core optical fiber |
| CN114945541A (en) * | 2020-01-30 | 2022-08-26 | 住友电气工业株式会社 | Cladding state detection method, cladding state detection device, and optical fiber manufacturing method |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202009002355U1 (en) | 2009-02-20 | 2009-04-23 | CCS Technology, Inc., Wilmington | Housing for receiving a splice and splicing device |
| DE102018114741B4 (en) | 2018-06-19 | 2022-06-30 | AIXEMTEC GmbH | Apparatus and method for aligning polarization-maintaining optical fibers |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59219707A (en) * | 1983-05-27 | 1984-12-11 | Fujikura Ltd | Method for aligning core of single mode optical fiber |
| AU585728B2 (en) * | 1986-08-15 | 1989-06-22 | Sumitomo Electric Industries, Ltd. | Method and apparatus of measuring outer diameter and structure of optical fiber |
| US5013345A (en) * | 1987-12-04 | 1991-05-07 | Fujikura Ltd. | Method of fusion-splicing polarization maintaining optical fibers |
| JP2001305372A (en) * | 2000-04-20 | 2001-10-31 | Mitsubishi Electric Corp | Optical fiber core measuring device, fusion splicer, focal position setting method for splicer, and optical fiber identifying method |
| SE523329C2 (en) * | 2000-06-20 | 2004-04-13 | Ericsson Telefon Ab L M | Determination of optical fiber type |
| JP3744812B2 (en) * | 2001-04-26 | 2006-02-15 | 住友電気工業株式会社 | Fusion splicing method of constant polarization optical fiber |
| SE523806C2 (en) * | 2002-02-26 | 2004-05-18 | Ericsson Telefon Ab L M | Method and apparatus for aligning the polarization shafts of fiber ends in two optical polarization preserving fibers with each other |
| US7194182B2 (en) * | 2002-11-25 | 2007-03-20 | Intel Corporation | Methods and apparatuses using a fiber-flexure induction soldering station |
-
2005
- 2005-05-03 DE DE102005020622A patent/DE102005020622A1/en not_active Ceased
-
2006
- 2006-05-03 WO PCT/DE2006/000767 patent/WO2006116990A1/en active Application Filing
- 2006-05-03 CN CN200680015271A patent/CN100578272C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108152010A (en) * | 2012-11-09 | 2018-06-12 | 南安市耀森智能设备有限公司 | A kind of assemble method of fixing device |
| CN108152010B (en) * | 2012-11-09 | 2019-11-12 | 泰山石膏（宣城）有限公司 | A kind of assemble method of fixed device |
| WO2014134803A1 (en) * | 2013-03-06 | 2014-09-12 | Luo Chunhui | Method and device for detecting fibre position and welding machine having same |
| CN109154696A (en) * | 2016-06-29 | 2019-01-04 | 华为技术有限公司 | A kind of multi-core optical fiber |
| CN114945541A (en) * | 2020-01-30 | 2022-08-26 | 住友电气工业株式会社 | Cladding state detection method, cladding state detection device, and optical fiber manufacturing method |
| CN114945541B (en) * | 2020-01-30 | 2024-02-13 | 住友电气工业株式会社 | Cladding state detection method, cladding state detection device, and optical fiber manufacturing method |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102005020622A1 (en) | 2006-11-16 |
| CN100578272C (en) | 2010-01-06 |
| WO2006116990A1 (en) | 2006-11-09 |
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