CN113149426A - Manufacturing method of decoherence optical fiber - Google Patents
Manufacturing method of decoherence optical fiber Download PDFInfo
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- CN113149426A CN113149426A CN202110421514.4A CN202110421514A CN113149426A CN 113149426 A CN113149426 A CN 113149426A CN 202110421514 A CN202110421514 A CN 202110421514A CN 113149426 A CN113149426 A CN 113149426A
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- optical fiber
- core
- decoherence
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- twisting
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/10—Non-chemical treatment
- C03B37/14—Re-forming fibres or filaments, i.e. changing their shape
- C03B37/15—Re-forming fibres or filaments, i.e. changing their shape with heat application, e.g. for making optical fibres
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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
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/2804—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers
- G02B6/2821—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers using lateral coupling between contiguous fibres to split or combine optical signals
- G02B6/2835—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers using lateral coupling between contiguous fibres to split or combine optical signals formed or shaped by thermal treatment, e.g. couplers
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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
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/2804—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers
- G02B6/2856—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers formed or shaped by thermal heating means, e.g. splitting, branching and/or combining elements
Abstract
The invention relates to the technical field of optical fibers, in particular to a manufacturing method of a decoherence optical fiber. The invention discloses a manufacturing method of a decoherence optical fiber, which comprises the following steps: s1, taking a conventional optical fiber, wherein the fiber core of the conventional optical fiber is of a cylindrical structure; and S2, randomly twisting the conventional optical fiber along the axial direction by taking a certain length as a unit, wherein the twisting is performed by taking the core shaft of the fiber core as a rotation axis. The optical fiber structure manufactured by the invention can disturb the coherence of transmitted light, realizes the output of wide-spectrum flat light, meets the requirements of an optical fiber gyroscope and the like on a broadband light source, and has the advantages of simple manufacturing process, easy realization and low cost.
Description
Technical Field
The invention belongs to the technical field of optical fibers, and particularly relates to a manufacturing method of a decoherence optical fiber.
Background
The broad spectrum flat light refers to a light beam with light intensity uniformly distributed in a section of broad spectrum in the laser transmission direction, and is widely applied to the fine processing fields of optical fiber gyroscopes, optical fiber sensing systems, optical fiber passive device tests, wavelength division multiplexing device tests, EDFA tests and the like due to uniform energy distribution. The wide-spectrum flat light has the characteristics of wide spectrum, stable power and uniform energy distribution, can meet the requirements of the light source of the optical fiber gyroscope, and is the main light source of the gyroscope.
At present, flat-top light sources used in the fiber-optic gyroscope mainly have two types: a spontaneous amplified radiation source (ASE) and a superluminescent light emitting diode light Source (SLD). The ASE light source is the main stream, can work in the whole C + L wave band, can reach 1530nm-1605nm, and has excellent wide spectrum characteristics. In addition, since the internal coherence of the ASE light source is weaker than that of the SLD, the spectral distribution is closer to a rectangle (whereas the distribution of the SLD is more gaussian), and the effect of applying the ASE light source to the fiber-optic gyroscope is better. Finally, the ASE light source can easily realize larger output power through an external control circuit, and has wider application range and stronger practicability.
Meanwhile, the operating spectrum of the ASE light source is wide, and the spectral flatness of the full bandwidth of the ASE light source is not ideal. The flatness is mainly limited by the coherence degree in the light emitting process of the light source, the coherence degree between photons is reduced, and the flatness of an output light field or the stability of light intensity can be correspondingly improved.
Experiments show that when laser is transmitted in the optical fiber, the coherence of the laser can be greatly eliminated by correspondingly processing the optical fiber, so that the flatness of the spectrum is improved. The existing treatment mode of the optical fiber changes the working environment of the optical fiber in an infiltration mode so as to eliminate coherence, but the mode has complex process and is not easy to realize, does not meet the requirements of the optical fiber gyroscope equipment on a light source, and is not applied.
Disclosure of Invention
The present invention is directed to a method for manufacturing an optical fiber for resolving the above-mentioned problems.
In order to achieve the purpose, the invention adopts the technical scheme that: a method for manufacturing a decoherence optical fiber comprises the following steps:
s1, taking a conventional optical fiber, wherein the fiber core of the conventional optical fiber is of a cylindrical structure;
and S2, randomly twisting the conventional optical fiber along the axial direction by taking a certain length as a unit, wherein the twisting is performed by taking the core shaft of the fiber core as a rotation axis.
Further, in step S2, before the random twisting, the portion to be twisted is heated to make the core reach a soft point.
Further, in step S2, the random twisting includes random twisting direction and random twisting angle.
Further, in step S2, the length of the unit cell is 1 cm, and the twist angle is 10-60 degrees.
Further, the fiber core is made of a glass material or a plastic material.
Further, the method includes step S3, taking a support wire, and spirally winding the optical fiber processed in step S2 on the support wire, wherein the pitches in the winding direction are randomly distributed.
Further, the support wire is an elastic cord.
Further, the diameter of the supporting wire is 2-10 mm.
Further, the thread pitch is 2-15 mm.
Further, the method includes step S4, fixing the optical fiber to the supporting wire by using a fixing member.
The invention has the beneficial technical effects that:
the optical fiber structure manufactured by the invention can well disturb the coherence of transmitted light to realize the output of wide-spectrum flat light, meets the requirements of an optical fiber gyroscope and the like on a wide-band light source, and has the advantages of simple manufacturing process, easy realization and low cost.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a flow chart of a method of an embodiment of the present invention;
FIG. 2 is a schematic illustration of a core structure prior to random twisting in accordance with an embodiment of the present invention;
FIG. 3 is a schematic diagram of the core structure processed in step S2 according to an embodiment of the present invention;
FIG. 4 is a block diagram of a resulting optical fiber structure made in accordance with an embodiment of the present invention;
FIG. 5 is a diagram showing the polarization state of polarized light of a laser pointer passing through a conventional optical fiber;
fig. 6a and 6b are polarization state diagrams of polarized light of a laser pointer at different moments of time through the optical fiber structure manufactured by the present invention.
Detailed Description
To further illustrate the various embodiments, the invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. Those skilled in the art will appreciate still other possible embodiments and advantages of the present invention with reference to these figures. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.
The invention will now be further described with reference to the accompanying drawings and detailed description.
As shown in fig. 1, a method for manufacturing a decoherence optical fiber includes the following steps:
s1, taking a conventional optical fiber, wherein the core of the conventional optical fiber is in a cylindrical structure.
The conventional optical fiber referred to herein is a conventional optical fiber in the market, and includes an outer cladding and a cylindrical core 11 (as shown in fig. 2) wrapped in the outer cladding, where the core 11 may be a glass core, a plastic core, or the like, and meanwhile, the core 11 may be a single-mode core or a multimode core.
S2, randomly twisting the conventional optical fiber in units of a certain length along the axial direction, the twisting being performed with the core axis of the core 11 as the rotation axis.
The random twist is that the twist of each unit is different and does not form a periodic structure, for example, the first unit is twisted by 40 degrees clockwise, the second unit is twisted by 45 degrees clockwise, the third unit is twisted by 30 degrees clockwise, and the fourth unit is twisted by 40 degrees … degrees counterclockwise, so that irregular twist is performed. By random torsion, different and irregular (random) stress surfaces are generated on the axial surface of the fiber core, the coherence of transmitted light is disturbed, and the output of the wide-spectrum flat light is realized.
Further, in this embodiment, before the random twisting, the portion to be twisted is heated, so that the fiber core 11 reaches a soft point, which facilitates the twisting deformation and prevents the fiber core 11 from being broken. The heating can be achieved by various heating devices, such as an electric heater.
Specifically, in this embodiment, a portion of the optical fiber to be twisted is heated to make the fiber core 11 reach a soft point, and then the bayonet is used to clamp two ends of the portion to be twisted, and then one of the buckles rotates to drive the fiber core 11 to twist.
Preferably, in this embodiment, the random twist includes random twist direction and random twist angle, so that the interference cancellation is better, but not limited thereto.
Preferably, in this embodiment, the length of the unit is 1 cm, but the unit is not limited thereto, and the twist angle of the core 11 along the axial direction of the core per 1 cm length is 10-60 degrees, which not only ensures the effect of changing the coherence, but also does not break the core 11 and affect the light permeability.
Fig. 2 shows the core 11' structure after the processing of step S2.
Further, in this embodiment, a step S3 is further included, in which one supporting wire 2 is taken, and the optical fiber 1 processed in the step S2 is spirally wound on the supporting wire 2, and the pitches in the winding direction are randomly distributed, as shown in fig. 3.
The random distribution of the screw pitches means that the screw pitches are different in size along the winding direction and do not have periodicity, namely, are irregularly distributed. And further, different stress surfaces are generated by randomly bending the axial surface of the fiber core, so that the coherence of transmitted light is more thoroughly disturbed, and the output of wide-spectrum flat light is realized.
Preferably, in this embodiment, the supporting wire 2 is cylindrical, which is easy to implement, and the curvature of the optical fiber 1 after being spirally wound is relatively gentle, so that the optical fiber core 11' is not broken, and the light transmittance is not affected. But is not limited thereto, and in some embodiments, the support wire 2 may also be prismatic, or the like.
Preferably, in this embodiment, the supporting wire 2 is soft, and can achieve a certain bending, so as to be convenient for use, but not limited thereto, and in some embodiments, the supporting wire 2 may also be a hard supporting wire.
In this embodiment, the supporting wire 2 is an elastic cord, which has good toughness and low cost, but not limited thereto, and in other embodiments, the supporting wire 2 may also be made of other materials such as plastic and metal.
Preferably, in this embodiment, the diameter of the support wire 2 is 2-10mm, which not only ensures the polarization effect, but also does not affect the light transmittance, and does not break the core 11' of the optical fiber 1.
Preferably, in this embodiment, the pitch is 2-15mm, which not only ensures that the polarization effect is well performed, but also does not affect the light transmittance.
Further, in this embodiment, the method further includes step S4, fixing the optical fiber 1 on the supporting wire 2 by using a fixing member, so as to prevent the optical fiber 1 from moving and deforming.
In this embodiment, the optical fiber 1 is fixed on the supporting wire 2 by using epoxy resin, which is easy to implement and low in cost, but not limited thereto, and in other embodiments, an elastic sleeve or a heat-shrinkable tube may be used for wrapping and fixing.
After the fixing, two ends 12 and 13 of the optical fiber 1 are reserved as optical fiber interfaces, so that the optical fiber connector is convenient and flexible to disassemble.
And (3) experimental verification:
the laser pen is used as a light source, and the polarization property is tested by outputting through a common optical fiber and the optical fiber structure manufactured by the invention. Because the laser pen is linearly polarized light, after being transmitted by a common optical fiber, the polarization direction deflects by a certain angle, but is still linearly polarized light, as shown in fig. 5; after the optical fiber structure manufactured by the invention outputs, the polarization direction is completely random, the polarization state is also changed, and the line polarization (as shown in figure 6a) and the elliptical polarization (as shown in figure 6b) are output randomly. The optical fiber structure manufactured by the invention can well disturb the coherence of transmitted light to realize the output of wide-spectrum flat light, meets the requirements of an optical fiber gyroscope and the like on a wide-band light source, and has the advantages of simple manufacturing process, easy realization and low cost.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A method for manufacturing a decoherence optical fiber is characterized by comprising the following steps:
s1, taking a conventional optical fiber, wherein the fiber core of the conventional optical fiber is of a cylindrical structure;
and S2, randomly twisting the conventional optical fiber along the axial direction by taking a certain length as a unit, wherein the twisting is performed by taking the core shaft of the fiber core as a rotation axis.
2. The method of making a decoherence optical fiber according to claim 1, wherein: in step S2, before the random twisting, the portion to be twisted is heated to make the core reach a soft point.
3. The method of making a decoherence optical fiber according to claim 1, wherein: in step S2, the random twist includes random twist direction and random twist angle.
4. The method of making a decoherence optical fiber according to claim 1, wherein: in step S2, the length of the unit is 1 cm, and the twist angle is 10-60 degrees.
5. The method of making a decoherence optical fiber according to claim 1, wherein: the fiber core is made of glass materials or plastic materials.
6. The method of fabricating a decoherence optical fiber according to any one of claims 1 to 5, wherein: and a step S3 of taking a support wire, and spirally winding the optical fiber processed in the step S2 on the support wire, wherein the pitches in the winding direction are randomly distributed.
7. The method of claim 6, wherein: the supporting wire is an elastic rope.
8. The method of claim 6, wherein: the diameter of the supporting wire is 2-10 mm.
9. The method of claim 6, wherein: the thread pitch is 2-15 mm.
10. The method of claim 6, wherein: the method further includes a step S4 of fixing the optical fiber to the support wire by using a fixing member.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110421514.4A CN113149426A (en) | 2021-04-20 | 2021-04-20 | Manufacturing method of decoherence optical fiber |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110421514.4A CN113149426A (en) | 2021-04-20 | 2021-04-20 | Manufacturing method of decoherence optical fiber |
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| CN113149426A true CN113149426A (en) | 2021-07-23 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1700079A (en) * | 2004-05-20 | 2005-11-23 | 北京大学 | Distributed Raman amplifier |
| CN101881853A (en) * | 2009-05-06 | 2010-11-10 | 北京中视中科光电技术有限公司 | Optical fiber used for eliminating laser coherence |
| CN103364956A (en) * | 2012-03-29 | 2013-10-23 | 山东浪潮华光光电子股份有限公司 | Method for uniformization and speckle elimination of optical fiber output laser and device thereof |
| CN103969739A (en) * | 2013-01-28 | 2014-08-06 | 无锡万润光子技术有限公司 | Vortex optical fiber on basis of linear refractive index distribution and preparation method thereof |
| JP2017517918A (en) * | 2014-04-04 | 2017-06-29 | ネックスジェン・パートナーズ・アイピー・リミテッド・ライアビリティ・カンパニーＮｘＧｅｎ Ｐａｒｔｎｅｒｓ ＩＰ， ＬＬＣ | System and method for communication using orbital angular momentum with multilayer overlay modulation |
| CN112068240A (en) * | 2020-09-07 | 2020-12-11 | 桂林电子科技大学 | Long-period chirped fiber grating and preparation method thereof |
-
2021
- 2021-04-20 CN CN202110421514.4A patent/CN113149426A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1700079A (en) * | 2004-05-20 | 2005-11-23 | 北京大学 | Distributed Raman amplifier |
| CN101881853A (en) * | 2009-05-06 | 2010-11-10 | 北京中视中科光电技术有限公司 | Optical fiber used for eliminating laser coherence |
| CN103364956A (en) * | 2012-03-29 | 2013-10-23 | 山东浪潮华光光电子股份有限公司 | Method for uniformization and speckle elimination of optical fiber output laser and device thereof |
| CN103969739A (en) * | 2013-01-28 | 2014-08-06 | 无锡万润光子技术有限公司 | Vortex optical fiber on basis of linear refractive index distribution and preparation method thereof |
| JP2017517918A (en) * | 2014-04-04 | 2017-06-29 | ネックスジェン・パートナーズ・アイピー・リミテッド・ライアビリティ・カンパニーＮｘＧｅｎ Ｐａｒｔｎｅｒｓ ＩＰ， ＬＬＣ | System and method for communication using orbital angular momentum with multilayer overlay modulation |
| CN112068240A (en) * | 2020-09-07 | 2020-12-11 | 桂林电子科技大学 | Long-period chirped fiber grating and preparation method thereof |
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