CN115437059A - Spout ring optic fibre and optical cable - Google Patents
Spout ring optic fibre and optical cable Download PDFInfo
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- CN115437059A CN115437059A CN202211028180.5A CN202211028180A CN115437059A CN 115437059 A CN115437059 A CN 115437059A CN 202211028180 A CN202211028180 A CN 202211028180A CN 115437059 A CN115437059 A CN 115437059A
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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
- G02B6/02—Optical fibres with cladding with or without a coating
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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
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/02042—Multicore 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
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
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Abstract
The application relates to a spray ring optical fiber and an optical cable, wherein the spray ring optical fiber is a single-mode optical fiber and comprises a natural-color optical fiber and an ink-jet mark arranged on the outer wall of the natural-color optical fiber; the ink jet mark comprises a plurality of ink dots which are periodically distributed at intervals along the axial direction of the natural color optical fiber; the ink dot period Lambda of the ink dots is not less than 350 mu m or not less than 650 mu m. The ink dot period Lambda of the ink dots is controlled to be less than or equal to 350 micrometers or more than or equal to 650 micrometers, so that the additional attenuation loss caused by the existence of the ink jet marks can be reduced, the grating effect of the jet ring optical fiber can be reduced and even avoided as much as possible, and the transmission performance in the transmission wavelength range can be guaranteed.
Description
Technical Field
The application relates to the technical field of optical fibers, in particular to a spray ring optical fiber and an optical cable.
Background
The fiber grating is a passive filtering optical device formed by the axial periodic modulation of the refractive index of the fiber core. The manufacture of fiber grating is generally carried out by ultraviolet writing method and mechanical stress method. The most applied method is an ultraviolet writing method, which utilizes the photosensitivity of silica (the refractive index generated by the fiber core is permanently changed by external incident photons) of the fiber core material to form a spatial phase grating in the fiber core, so that the fiber has the filtering characteristic. The mechanical stress method is that outside the optical fiber, the optical fiber is stressed radially inwards by various mechanical external forces, so as to induce grating effect and form the optical fiber grating.
In some related technologies, a fiber grating and a method for manufacturing the same are disclosed, wherein hard inlays are uniformly spaced in an axial direction between a fiber coating and a colored coating, and the fiber core of the fiber grating is subjected to periodic internal stress through the hard inlays, so that the fiber core density is periodically changed, and a grating effect is generated, thereby forming the fiber grating.
In the optical communication cable industry, a technology called optical fiber ring spraying is widely used, and by using the ring spraying technology, a color ring is formed on an optical fiber, so that different optical fibers in the same sleeve unit can be identified and distinguished, especially under the condition that the number of optical fibers contained in the same sleeve unit is large, such as 24 cores, 36 cores or even 48 cores contained in the same sleeve.
However, when the color ring is attached to the optical fiber, because the color ring has a certain thickness, the color ring may be similar to the above-mentioned hard inlay, and may cause the fiber core to be subjected to a radial inward periodic stress, thereby causing a periodic change in the density of the fiber core, and further generating a grating effect, and the grating effect may cause the phenomenon of increased attenuation of the optical fiber, which affects the transmission performance of the optical fiber itself.
Disclosure of Invention
The embodiment of the application provides a spray ring optical fiber and an optical cable, which can reduce or even avoid the occurrence of grating effect of the spray ring optical fiber as much as possible, and ensure the transmission performance in a transmission wavelength range.
In a first aspect, a spray ring optical fiber is provided, wherein the spray ring optical fiber is a single-mode optical fiber and comprises a natural-color optical fiber and an ink-jet mark arranged on the outer wall of the natural-color optical fiber;
the ink jet mark comprises a plurality of ink dots which are periodically distributed at intervals along the axial direction of the natural-color optical fiber;
the dot period Lambda of the dots is not less than 350 μm or not less than 650 μm.
In some embodiments, the dot period Λ is 300 μm or 700 μm.
In some embodiments, the distance between two adjacent ink-jet marks is L 1 The value range is 35-500 mm.
In some embodiments, the number of ink dots contained in the inkjet label is 5 to 20.
In some embodiments, the single mode fiber has a transmission wavelength in the range of 1200nm to 1650nm.
In some embodiments, the ink dot period Λ is the sum of the length of an ink dot along the axis of the natural-color optical fiber and the distance between two adjacent ink dots.
In some embodiments, the dot period Λ is calculated using the following equation:
Λ＝(D 1 -d 1 )/[N(m 1 -1)]+(D 2 -d 2 )/[N(m 2 -1)]+...+(D i -d i )
/[N(m i -1)]+...+(D N -d N )/[N(m N -1)]
wherein N is the number of the ink-jet marks on the section of the spray ring optical fiber, and N is more than or equal to 2;
D i for the length of the ith ink jet mark along the axial direction of the unbleached optical fiber, i =1, · N;
d i for the ith one of the ink jet marksThe length of any one ink dot along the axial direction of the natural-color optical fiber;
m i and identifying the number of ink dots contained in the ith ink jet.
In some embodiments, the ring-spraying optical fiber further comprises a coloring coating layer, the coloring coating layer covers the outer wall of the natural-color optical fiber, and the inkjet mark is located between the natural-color optical fiber and the coloring coating layer;
and/or the natural color optical fiber comprises a fiber core, a cladding and an optical fiber coating layer which are sequentially arranged from inside to outside along the warp direction;
and/or the ink jet marks are single rings or at least two single rings which are distributed at intervals along the axial direction of the natural color optical fiber;
and/or the ink jet mark is provided with an opening in the shape of a cross section perpendicular to the axial direction of the natural-color optical fiber.
In a second aspect, a spray ring optical fiber is provided, which comprises a natural color optical fiber and an ink jet mark arranged on the outer wall of the natural color optical fiber;
the ink jet mark comprises a plurality of ink dots which are periodically distributed at intervals along the axial direction of the natural-color optical fiber;
the dot period Λ of the dots is configured to: and the additional attenuation loss caused by the existence of the ink jet mark in the transmission wavelength range of the spray ring optical fiber is not higher than a preset value.
In a third aspect, there is provided an optical cable comprising a blown-ring optical fiber as described in any of the above.
The technical scheme who provides this application brings beneficial effect includes:
the embodiment of the application provides a spray ring optical fiber and an optical cable, and the additional attenuation loss caused by the existence of ink jet marks can be reduced by controlling the ink dot period Lambda of ink dots to be less than or equal to 350 micrometers or to be greater than or equal to 650 micrometers, so that the grating effect of the spray ring optical fiber can be reduced or even avoided as much as possible, and the transmission performance in a transmission wavelength range is guaranteed.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic diagram illustrating the attenuation generation of a blown ring fiber according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram illustrating a manufacturing process of a blown-ring optical fiber according to an embodiment of the present disclosure;
FIG. 3 is a schematic cross-sectional view of a blown-ring optical fiber provided in an embodiment of the present application;
FIG. 4 is an enlarged view of an inkjet mark in a ring-ejecting optical fiber provided in an embodiment of the present application;
fig. 5 is a schematic view (single ring) of a ring-spraying optical fiber provided in an embodiment of the present application;
FIG. 6 is a schematic view (double rings) of a blown ring optical fiber provided in an embodiment of the present application;
FIG. 7 is an additional attenuation spectrum of a blown-ring fiber with a dot period of 250 μm provided in an embodiment of the present application;
FIG. 8 is an additional attenuation spectrum of a blown-ring fiber with a dot period of 350 μm provided by an embodiment of the present application;
FIG. 9 is an additional attenuation spectrum of a blown-ring fiber with a dot period of 450 μm provided in an embodiment of the present application;
FIG. 10 is an additional attenuation spectrum of a blown-ring fiber with a dot period of 550 μm provided in an embodiment of the present application;
FIG. 11 is an additional attenuation spectrum of a blown-ring fiber with a dot period of 650 μm provided by an embodiment of the present application.
In the figure: 1. a natural color optical fiber; 10. a core; 11. a cladding layer; 12. an optical fiber coating layer; 2. ink jet marking; 20. ink dots; 3. a colored coating layer; 4. a pay-off unit; 5. code spraying equipment; 6. coating a mould with coloring ink; 7. a coloring ink curing furnace; 8. and a wire take-up unit.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the process of researching the optical fiber with the blown ring, the applicant inadvertently tests the attenuation spectrums of the optical fiber with the natural color and the optical fiber with the blown ring, and finds that the attenuation of certain wave bands is increased in the transmission wavelength range of the optical fiber in the additional attenuation spectrums of the optical fiber with the blown ring.
The applicant has turned through a large number of documents and books to find the attenuation phenomenon of the optical fiber with the spray ring, and has not found the phenomenon mentioned in the field and the industry, and has not explained the phenomenon and how to avoid the attenuation phenomenon.
The applicant then made more intensive studies on the above phenomena, and combined with the principle of fiber grating, the reason for the above attenuation is clarified, and specifically, as shown in fig. 1, the ink dots 20 located below the colored coating layer 3 have a certain thickness, and the ink dots 20 are periodically distributed at intervals, so that the fiber core of the optical fiber is subjected to radially inward non-uniform periodic stress, and further, the refractive index of the fiber core of the optical fiber is changed, thereby causing the grating effect, and affecting the transmission attenuation of the ring-spraying optical fiber.
After finding the cause of the attenuation increase, the applicant has aimed the study on how to reduce or even avoid the effect of such attenuation increase on the transmission performance of the optical fiber.
Because the spraying rings on the spraying ring optical fibers are used for identifying and distinguishing different optical fibers in the same sleeve unit, in order to avoid attenuation increase caused by the spraying rings, the simplest scheme is that the spraying rings are not directly used, and the other mode is used for identifying and distinguishing, however, the scheme still cannot fundamentally solve the problems, namely how to identify and distinguish different optical fibers in the same sleeve unit by using the spraying rings, and meanwhile, the influence on the transmission performance of the spraying ring optical fibers caused by the attenuation increase caused by the spraying rings can also be reduced or even avoided.
After a great deal of research, the applicant finds that in the ring-spraying optical fiber technology, in the process parameters related to the spraying ring, such as the ink dot period, the number of ink dots in a single ring, the number of rings, the spacing and the like, the applicant finds that the ink dot period has an influence on whether the grating effect can occur in the range of the transmission waveband of the ring-spraying optical fiber.
That is, the influence of attenuation increase caused by the spray ring on the transmission performance of the spray ring optical fiber can be reduced or even avoided by controlling the ink dot period.
In view of this, referring to fig. 2, fig. 3, fig. 4, fig. 5 and fig. 6, the present application provides a ring-spraying optical fiber, which is a single-mode optical fiber and includes a natural-color optical fiber 1 and an inkjet mark 2 disposed on an outer wall of the natural-color optical fiber 1; the natural-color optical fiber 1 generally comprises a fiber core 10, a cladding 11 and an optical fiber coating layer 12 which are sequentially arranged from inside to outside along the warp direction; a coloring coating layer 3 is also coated on the outer side of the optical fiber coating layer 12, so that the ink jet mark 2 is positioned between the natural-color optical fiber 1 and the coloring coating layer 3; as can be seen from fig. 3, the ink-jet marking 2 has an opening in the cross section perpendicular to the axial direction of the natural-color optical fiber 1, that is, the ink-jet marking 2 is changed into an arc shape like an open ring by the coating of the colored coating layer 3, and of course, the ink-jet marking 2 can also be coated into a closed ring, and since the ink-jet marking 2 only has a marking function, when ink is jetted, as shown in fig. 2, the ink is sprayed on one side, so the ink is usually an open ring as shown in fig. 3.
The ink jet mark 2 comprises a plurality of ink dots 20 periodically distributed at intervals along the axial direction of the natural-color optical fiber 1, and the ink dots 20 are generally in an approximately elliptical shape spread on a circumferential curved surface of the optical fiber and have a certain thickness; the color of the coating is black or a color which is in sharp contrast with the colored coating layer 3 and the optical fiber coating layer 12 and can be seen by naked eyes on the surface of the optical fiber; and the dot period Lambda of the dots 20 is not less than 350 mu m or not less than 650 mu m.
As shown in fig. 2, the optical fiber 1 of the original color is paid out by a pay-off unit 4 on the coloring equipment, sequentially passes through a code spraying equipment 5, a coloring ink coating mold 6 and a coloring ink curing furnace 7, and finally is taken up on a special tray by a take-up unit 8 on the coloring equipment to form the ring-sprayed optical fiber.
The ink-jet mark 2 in the ring-spraying optical fiber is mainly formed by a code-spraying device 5. The code spraying device 5 is to dissolve the ultrafine carbon black particles in an organic solvent, disperse the carbon black particles into charged droplets with micron-sized diameters by using a crystal oscillator element, and finally control the falling trajectory of the carbon black droplets by a deflection plate with an electric field so that the carbon black droplets fall on the surface of the natural-color optical fiber 1 at certain intervals along the axial direction of the optical fiber.
In actual production, the ink jet printing equipment 5 is linked with coloring equipment, and the falling interval of carbon black droplets and the linear speed of optical fiber coloring production are matched, so that the morphological characteristics of the ink dots 20 and the ink jet marks 2 in the jet ring optical fiber can be controlled.
Therefore, the falling interval of the ink dots 20 and the linear speed of the optical fiber coloring production can be controlled, and the ink dot period Λ of the ink dots 20 is further controlled, so that the additional attenuation loss caused by the existence of the ink jet marks is reduced, the grating effect of the jet ring optical fiber is finally reduced and even avoided as much as possible, and the transmission performance in the transmission wavelength range is guaranteed.
Referring to fig. 5, the ink-jet label 2 may be a single ring, and referring to fig. 6, the ink-jet label 2 may also be a multi-ring, that is, at least two single rings are spaced along the axial direction of the natural-color optical fiber 1.
The optical fiber with other ring number can be analogized with reference to fig. 5, 6 and so on.
The morphological and structural features of a single inkjet mark in a blown ring fiber are shown in fig. 4. One ink jet mark 2 in the large dotted line box is composed of 8 single ink dots 20, and the length of one ink dot 20 in the small dotted line box along the axis direction of the natural-color optical fiber 1 and the distance between two adjacent ink dots 20 jointly form one ink dot period Λ.
According to the long-period fiber grating theory, there is a first formula as follows:
λ n ＝(n core (01) -n clad (n) )*Λ 0
wherein λ is n Is the wavelength of the light wave that is coupled from the fundamental mode to the n-order cladding mode, i.e. the wavelength that is affected by the grating effect; n is core (01) And n clad (n) Refractive indices, Λ, of the fundamental core mode and the n-order cladding mode, respectively 0 Is the grating period.
When the dot period Λ is used instead of the grating period Λ in the first equation above 0 And the theoretical value of the transmission wavelength influenced by different ink dot periods can be calculated by the first formula by combining the refractive indexes of the fiber core and the cladding of the optical fiber.
Through further experiments, the applicant analyzes the influence of different ink dot periods on the 1200 nm-1650 nm wavelength attenuation spectrum of the common single-mode optical fiber. It is found that when the ink dot period is less than or equal to 300 μm or more than or equal to 700 μm, the attenuation of the wavelength from 1200nm to 1650nm cannot be obviously influenced, and when the ink dot period is between 300 μm and 700 μm, the attenuation of some wave bands within the range from 1200nm to 1650nm is increased, and the specifically influenced wave bands are directly related to the ink dot period, namely, the transmission performance of the optical fiber is negatively influenced.
In actual manufacturing, the accuracy of the code spraying device 5 for controlling the falling of the small carbon black liquid drops is limited, and the measured value of the ink dot period Λ fluctuates within a certain range, so the L is adopted 2 And L 3 The dot period Λ is calculated with a certain error, and in order to reduce the error as much as possible, an average dot period is used as the dot period in the calculation, that is, an average value of a plurality of dot periods is taken.
The specific method comprises the following steps: firstly, stripping the optical cable from any position of the optical cable to expose any section of optical fiber, taking a section of spray ring optical fiber containing a plurality of continuous ink-jet marks 2, and cleaning the surface of the spray ring optical fiber. Then, the first ink jet mark 2 is placed under a high-precision optical microscope, and the length d of the ink jet mark and the number m of ink dots are measured; and so on, measuring all the ink jet mark lengths d and the ink dot numbers m. And finally, calculating the dot period Lambda by adopting a second formula as follows:
Λ＝(D 1 -d 1 )/[N(m 1 -1)]+(D 2 -d 2 )/[N(m 2 -1)]+...+(D i -d i )
/[N(m i -1)]+...+(D N -d N )/[N(m N -1)]
wherein N is the number of the ink-jet marks 2 on the selected section of the ring-spraying optical fiber, and N is more than or equal to 2;
d i for the length of the ith inkjet mark 2 along the axial direction of the unbleached optical fiber 1, i =1,. Ang., N;
d i the length of any ink point 20 in the ith ink jet mark 2 along the axial direction of the natural-color optical fiber 1;
m i the number of ink dots 20 included in the ith ink jet marker 2.
Calculating the critical ink point period of the conventional single-mode fiber with the grating effect in the transmission window range of 1200nm to 1650nm according to the first formula requires knowing the difference between the refractive indexes of the core fundamental mode and the n-order cladding mode, but considering that the difference is difficult to obtain for fibers produced by different manufacturers and different processes and that the difference has a certain difference under different wavelengths, the applicant uses a typical value of 0.48% of the refractive index difference between the g.652d single-mode fiber and the cladding in related documents (design and manufacture of optical fiber cables (fourth edition), cheng han press, press of university of zhejiang 2020.6, P167, fig. 1-5, refractive index broken surface diagram of full-wave fiber) to roughly calculate the fiber core and to guide the setting of the critical value of the average ink point period in the experiment.
According to calculation, the theoretical dot period for the grating effect at 1200nm is 250 μm, and the theoretical dot period for the grating effect at 1650nm is 344 μm. Thus, a conventional g.652d fiber was designed for the spray ring experiment according to the following parameters:
then, sampling and testing 1# to 5# ring spraying optical fiber samples and natural color optical fiber samples before ring sprayingThe attenuation spectra were subtracted from each other to obtain additional attenuation loss due to the presence of the inkjet mark, and further to obtain additional attenuation spectra of the 1# -5 # optical fiber, as shown in fig. 7-11 (numerical value of ordinate × 10) -2 ) It can be seen that:
when the average ink dot period is 250 mu m, no obvious additional loss exists in the wavelength range of 1200-1650 nm;
when the average ink dot period is 350 mu m, an obvious additional loss peak is generated at the 1260nm wavelength;
when the average ink dot period is 450 mu m, an obvious additional loss peak is generated at the wavelength of 1440 nm;
when the average ink dot period is 550 μm, an obvious additional loss peak is generated at the wavelength of 1590 nm;
when the average ink dot period is 650 mu m, no obvious additional loss exists in the wavelength range of 1200-1650 nm;
it can be seen that under the above experimental conditions, the critical average dot periods at which the raster effect occurs are around 350 μm and 650 μm. The preferred dot period thresholds are 300 μm and 700 μm, considering experimental accuracy and differences in refractive index differences between the core and cladding of the primary fiber produced by different manufacturers and processes, and the threshold should be extrapolated appropriately to cover the case of the mainstream single mode fiber.
In actual manufacturing, the distance L between two adjacent ink-jet marks 2 1 Can be adjusted as required, but is generally controlled within 35-500 mm. When the distance L is 1 When the thickness is less than 35mm, the ink jet marks 2 are too dense in the axial direction of the optical fiber, and even if the grating effect does not occur, the ink dots 20 positioned under the coloring coating layer 3 can also induce dense optical fiber microbending, so that the transmission loss of the long wavelength window (close to 1650 nm) of the optical fiber is increased; distance L 1 If the thickness exceeds 500mm, the splicing operation during the cable construction may be affected. This is because the length of the optical fiber to be spliced is generally 0.5 to 1m when the optical cable is constructed, and if the pitch L is set 1 Exceeding 500mm means that the ink jet markings 2 are more sparse on the surface of the fiber and it may be difficult to identify the blown ring fiber when splicing.
In actual manufacture, the number of dots 20 can be adjusted as desired, but is generally controlled to be in the range of 5 to 20. When the number of the ink dots 20 in a single ink jet mark 2 is less than 5, the identifiability of the ink jet mark 2 on the ring-spraying optical fiber is affected by the too short length of the ink jet mark 2, so that the number of the ink dots 20 is generally more than 5; when the number of the ink dots 20 is 10 to 15, the ink jet mark 2 can have better identifiability; when the number of ink dots 20 in a single inkjet label 2 exceeds 20, the number of ink dots 20 in the axial direction of the optical fiber may be too dense, and the ink dots 20 located under the colored coating layer 3 may induce dense optical fiber microbending, thereby increasing the transmission loss of the long wavelength window (near 1650nm side) of the optical fiber.
The application also provides a spray ring optical fiber which comprises a natural color optical fiber 1 and an ink jet mark 2 arranged on the outer wall of the natural color optical fiber 1; the ink jet mark 2 comprises a plurality of ink dots 20 periodically distributed at intervals along the axial direction of the natural-color optical fiber 1; the dot period Λ of the dot 20 is configured to: the additional attenuation loss caused by the existence of the ink jet mark in the transmission wavelength range of the jet ring optical fiber is not higher than a preset value. Therefore, the optical fiber grating effect of the spray ring optical fiber can be reduced or even avoided as much as possible, and the transmission performance in the transmission wavelength range is guaranteed
As an example, in this embodiment, the optical ring-spraying fiber may be a single-mode fiber, where the ink dot period Λ ≦ 350 μm or ≧ 650 μm, and the transmission wavelength range of the single-mode fiber is 1200nm to 1650nm, and for the predetermined value, the transmission performance requirement of the fiber may be set according to the actual requirement, in order to determine whether there is an obvious additional attenuation loss caused by the presence of the ink jet mark to meet the transmission performance requirement, as illustrated in fig. 7 to 11, for example, as shown in fig. 7 to 11, the predetermined value is set to 0.2dB/km, and if the additional attenuation loss caused by the presence of the ink jet mark does not exceed 0.2dB/km in the whole transmission wavelength range, it is determined that there is no obvious additional loss, otherwise, there is an obvious additional loss.
As an example, in this embodiment, the optical fiber may also be other kinds of optical fibers, such as a multimode optical fiber, and at this time, the ink dot period Λ may be obtained by repeating the principle of obtaining the ink dot period of the single-mode optical fiber, and the calculation is performed according to the manner of obtaining the ink dot period of the single-mode optical fiber, which is not described in detail herein.
The application also provides an optical cable which comprises the ring spraying optical fiber provided by the embodiment.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.
It is noted that, in this application, relational terms such as "first" and "second," and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
The previous description is only an example of the present application, and is provided to enable any person skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The ring spraying optical fiber is characterized in that the ring spraying optical fiber is a single-mode optical fiber and comprises a natural-color optical fiber (1) and an ink-jet mark (2) arranged on the outer wall of the natural-color optical fiber (1);
the ink jet mark (2) comprises a plurality of ink dots (20) which are periodically distributed at intervals along the axial direction of the natural-color optical fiber (1);
the dot period Lambda of the dots (20) is not less than 350 mu m or not less than 650 mu m.
2. The optical blown ring fiber of claim 1, wherein:
the ink dot period Lambda is less than or equal to 300 mu m or more than or equal to 700 mu m.
3. The optical blown ring fiber of claim 1, wherein:
the distance L between two adjacent ink-jet marks (2) 1 The value range is 35-500 mm.
4. The optical blown ring fiber of claim 1, wherein:
the number of the ink dots (20) contained in the ink jet mark (2) is 5-20.
5. The optical blown ring fiber of claim 1, wherein:
the transmission wavelength range of the single-mode optical fiber is 1200 nm-1650 nm.
6. The optical blown ring fiber of claim 1, wherein:
the ink dot period lambda is the length of the ink dots (20) along the axial direction of the natural-color optical fiber (1) and the sum of the distance between the ink dots (20) and the adjacent ink dots.
7. The optical fiber of claim 1, wherein the ink dot period Λ is calculated using the following formula:
Λ＝(D 1 -d 1 )/[N(m 1 -1)]+(D 2 -d 2 )/[N(m 2 -1)]+...+(D i -d i )/[N(m i -1)]+...+(D N -d N )/[N(m N -1)]
wherein N is the number of the ink-jet marks (2) on the section of the spray ring optical fiber, and N is more than or equal to 2;
D i the length of the ith inkjet mark (2) along the axial direction of the unbleached optical fiber (1) is i =1, · N;
d i the length of any ink dot (20) in the ith ink-jet mark (2) along the axial direction of the natural-color optical fiber (1);
m i the number of ink dots (20) contained in the ith ink jet mark (2) is shown.
8. The optical blown ring fiber of claim 1, wherein:
the ring-spraying optical fiber further comprises a coloring coating layer (3), the coloring coating layer (3) covers the outer wall of the natural-color optical fiber (1), and the ink-jet mark (2) is located between the natural-color optical fiber (1) and the coloring coating layer (3);
and/or the natural-color optical fiber (1) comprises a fiber core (10), a cladding (11) and an optical fiber coating layer (12) which are sequentially arranged from inside to outside along the warp direction;
and/or the ink-jet mark (2) is a single ring or comprises at least two single rings which are distributed at intervals along the axial direction of the natural-color optical fiber (1);
and/or the ink-jet mark (2) is provided with an opening in the shape of a cross section perpendicular to the axial direction of the natural-color optical fiber (1).
9. The optical fiber with the spraying ring is characterized by comprising a natural-color optical fiber (1) and an ink-jet mark (2) arranged on the outer wall of the natural-color optical fiber (1);
the ink jet mark (2) comprises a plurality of ink dots (20) which are periodically distributed at intervals along the axial direction of the natural-color optical fiber (1);
the dot period Λ of the dot (20) is configured to: and the additional attenuation loss caused by the existence of the ink jet mark (2) in the transmission wavelength range of the spray ring optical fiber is not higher than a preset value.
10. An optical cable, characterized by: comprising a blown ring optical fiber according to any one of claims 1 to 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211028180.5A CN115437059A (en) | 2022-08-25 | 2022-08-25 | Spout ring optic fibre and optical cable |
| PCT/CN2022/127615 WO2024040737A1 (en) | 2022-08-25 | 2022-10-26 | Ring-sprayed optical fiber, and optical cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211028180.5A CN115437059A (en) | 2022-08-25 | 2022-08-25 | Spout ring optic fibre and optical cable |
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| CN115437059A true CN115437059A (en) | 2022-12-06 |
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| CN202211028180.5A Pending CN115437059A (en) | 2022-08-25 | 2022-08-25 | Spout ring optic fibre and optical cable |
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| CN (1) | CN115437059A (en) |
| WO (1) | WO2024040737A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19628154A1 (en) * | 1996-07-12 | 1998-01-15 | Kwo Kabel Gmbh | Multiple optical fibres with respective colour markings for optical cable |
| US7072554B2 (en) * | 2002-08-09 | 2006-07-04 | Fujikura Ltd. | Optical fiber and optical fiber cable using the same |
| JP2011191689A (en) * | 2010-03-16 | 2011-09-29 | Sumitomo Electric Ind Ltd | Coated optical fiber and method of producing the same |
| CN202735535U (en) * | 2012-06-20 | 2013-02-13 | 南京烽火藤仓光通信有限公司 | Colourful optical fiber with identification |
| JPWO2020045372A1 (en) * | 2018-08-27 | 2021-08-26 | 住友電気工業株式会社 | Manufacturing method of optical fiber core wire with identification mark and optical fiber core wire with identification mark |
| CN110908033B (en) * | 2019-12-06 | 2021-04-27 | 江苏亨通光电股份有限公司 | Interval colored optical fiber, preparation method thereof and optical cable |
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- 2022-10-26 WO PCT/CN2022/127615 patent/WO2024040737A1/en unknown
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