CN103246008A - Multicore Airy optical fiber based on arrays - Google Patents
Multicore Airy optical fiber based on arrays Download PDFInfo
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- CN103246008A CN103246008A CN2012100311853A CN201210031185A CN103246008A CN 103246008 A CN103246008 A CN 103246008A CN 2012100311853 A CN2012100311853 A CN 2012100311853A CN 201210031185 A CN201210031185 A CN 201210031185A CN 103246008 A CN103246008 A CN 103246008A
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Abstract
The invention provides a multicore Airy optical fiber based on arrays, which comprises a coating layer, a covering layer and a group or multigroup of array cores, wherein spatial arrangement of each group of array cores of the optical fiber satisfies or approximately satisfies an Airy function; the Airy optical fiber in a certain length always exists, when a Gauss beam is input to one end of the optical fiber, through optical coupling between fiber cores, luminous intensity distribution of an outgoing light beam of each group of array cores at the other end of the optical fiber satisfies or approximately satisfies that of an Airy light beam. According to the multicore Airy optical fiber based on the arrays, the outgoing light beam of the optical fiber end inherits or partially inherits three major characteristics of the Airy beams, and namely, the light beam has capacities of horizontal acceleration, no diffraction and self-cure; and the multicore Airy optical fiber wholly has the characteristics of small structure, flexible operation, stable system, strong anti-interference capacity and the like, and can be used for light beam generation, particle control, sensing application and the like.
Description
(1) technical field
The present invention relates to a kind of optical fiber, preferably be applied to use the light beam of optical fiber to generate, particulate is controlled, Application in Sensing etc.
(2) background technology
Light wave remains the constant diffraction light-free bundle that is considered in communication process, the most typical example of no diffracted wave is bessel beam.1979, (Am.J.Phys., 1979,47 (3): 246～267) under the background that quantum is learned, release the solution that schrodinger equation has the Airy ripple bag of no diffraction in theory, this ripple bag had the characteristic of freely accelerating to M.V.Berry etc.(Opt.lett. such as Georgios A.Siviloglou in 2007,2007,32 (8): 979～981) at first studied the acceleration Airy light beam of finite energy, and first observed is to experimental result (the Frontiers in Optics of Airy laser beam, OSA, 2007.PDP_B3), experimental verification the Airy laser beam have unusual characteristics, can keep the no diffraction (Phys.Rev.Lett. of long distance, 1987,58 (15): 1499～1510 and J.Opt.Soc.Am.A, 1987,4 (4): 651～654) propagate, and have the characteristic of freely accelerating.
In a word, the Airy laser beam has following 3 very tempting big characteristics: freely accelerate (or laterally accelerating) in communication process, be similar to the trajectory of bullet motion under the gravity effect; The no diffraction of approximate maintenance in communication process; In communication process, have self-healing characteristic (Opt.Commun., 1998,151 (4-6): 207～211 and Opt.Commun., 1998,151 (4-6): 207～211).These unique characteristics that the Airy laser beam has, potentiality therefore have a wide range of applications.(Science, 2009,324 (5924): 229～232) use the femtosecond pulse of two-dimentional Airy laser beam to cause nonlinear plasma filament in the air such as Pavel Polynkindeng.(Nature Photonics, 2008,2 (11): 675～678) utilize the Airy laser beam to be radiated in the alternately particulate samples chamber of micron dimension, realized between partial zones, accurately shifting or the cleaning optical particulate such as J.Baumgartl.
A plurality of fiber cores that multi-core fiber typically refers to one group of axially parallel place the optical fiber that forms among the common fibre cladding.Can form multiple multi-core fiber by different drawing methods.United States Patent (USP) (MulticoreGlass Optical Fiber and Methods of Manufacturing such Fibers, United States Patent, Patent Number6,154,594,2000) method for making of cross sectional shape for the multi-core fiber of circular, oval and other shape proposed; United States Patent (USP) (Method for Producing Parallel Arrays of Fibers, United States Patent, Patent Number7,209,616B2,2007) adopt special-purpose wire drawing closing quotation locating device, draw out crystal optical fibre (perhaps capillary type optical fiber or porous optical fiber or microstructure multi-core fiber array); European patent (Method of Producing Multi core Fibers, European PatentSpecification, Patent Number0,151,804B1) a plurality of single-core fiber prefabricated rods are directly pulled out dull and stereotyped multi-core fiber or star-like multi-core fiber according to the arrangement of certain space angle.
Although the research of Airy light beam and using does not more and more widely relate to utilizing array multi-core fiber to bring out to penetrate and generates an Airy light beam.
(3) summary of the invention
The object of the present invention is to provide a kind of array multi-core Airy optical fiber that can generate the Airy light beam in optical fiber end.
The object of the present invention is achieved like this:
In experiment, finite energy Airy laser beam can adopt Gaussian beam to pass through the modulation of cube phase place, realizes through fourier lense again.Therefore, after Gauss light goes into to inject one section Airy optical fiber (spatial arrangement of fiber cores satisfy or approximate be satisfied with the Airy function), optically-coupled between the fibre core can realize the phase place modulation, by changing the length of Airy optical fiber, can make the intensity of optical fiber end output light field and phase place all satisfies or the approximate light distribution of being satisfied with the Airy light beam, like this, just Airy light beam or accurate Airy light beam have been obtained in the Airy optical fiber end.
Two dimension Airy laser beam (as shown in Figure 1) transmit as shown in Figure 2 in the space, and from figure, the 3 big characteristics that have of Airy light beam as can be seen: (1) freely accelerates (or horizontal acceleration), is similar to the trajectory that the bullet under the gravity effect moves; (2) the no diffraction of approximate maintenance in transmission course; (3) self-healing feature, after a certain principal maximum of Airy laser beam decayed to minimal value, " self-healing " formed a maximum value gradually at once.Equally, no matter be one dimension Airy optical fiber (as Fig. 3,4 and 5) or the outgoing light field of two-dimentional Airy optical fiber (as Fig. 6,7 and 8), they have all inherited the part characteristic of Airy light beam, but, because the restriction of Airy fiber core quantity makes the light beam of Airy optical fiber end outgoing only have a limited number of principal maximums, therefore among the figure, self-healing feature has been subjected to inhibition, and freely accelerates and do not have diffraction characteristic also to be slackened.
Compared with prior art, advantage of the present invention is:
1, three big characteristics of Airy light beam are inherited or herided partially to the light beam of Airy optical fiber exit end outgoing, compares with the light field of general single-mode fiber exit end outgoing, and its no diffraction transmission range is wanted big several times even higher.
2, traditional Airy light beam realizes that by geometrical light-path then these light paths ' integrated ' together, structure is small for Airy optical fiber, system stability, and antijamming capability is strong.
3, because Airy optical fiber space pliability is fabulous, therefore can be chosen in output Airy light beam on the position of any appropriate and the direction, be convenient to particulate control with sensing on application.
(4) description of drawings
Fig. 1 is two-dimentional Airy light beam synoptic diagram;
Fig. 2 is the transmission synoptic diagram of two-dimentional Airy light beam in the space;
Fig. 3 is one dimension Airy optical fiber three-dimensional section view synoptic diagram;
Fig. 4 is the cross sectional representation of one dimension Airy optical fiber;
Fig. 5 is the transmission synoptic diagram of one dimension Airy optical fiber end outgoing light field in the space;
Fig. 6 is two-dimentional Airy optical fiber three-dimensional section view synoptic diagram;
Fig. 7 is the cross sectional representation of two-dimentional Airy optical fiber;
Fig. 8 is the transmission synoptic diagram of two-dimentional Airy optical fiber end outgoing light field in the space;
Fig. 9 is the Airy cross section of optic fibre synoptic diagram of the non-crossing arrangement of many group one dimension fibre core arrays;
Figure 10 is that the two-dimentional fibre core array of many groups intersects or the Airy cross section of optic fibre synoptic diagram of non-crossing arrangement;
Figure 11 is that the relation that changes with transmission range between accurate Airy light beam light intensity, general single mode fiber outgoing Gaussian beam light intensity and the Airy light beam light intensity of the outgoing of Airy optical fiber end contrasts synoptic diagram;
Figure 12 is that fibre core is the transmission of Airy optical fiber end outgoing light field in the space of cruciform array distribution;
Figure 13 is the one dimension Airy optical fiber synoptic diagram of band light source tail optical fiber;
Figure 14 aims at synoptic diagram with the multi-core fiber of the Airy optical fiber of the non-crossing arrangement of many groups one dimension fibre core array coupling and the welding of optical fiber pigtail;
Figure 15 is the Airy optical fiber synoptic diagram of the non-crossing arrangement of many groups one dimension fibre core array of band light source input structure;
Figure 16 is the two-dimentional Airy optical fiber synoptic diagram of band light source tail optical fiber;
Figure 17 is the Airy optical fiber synoptic diagram of the non-crossing arrangement of many groups of two-dimentional fibre core arrays of band light source input structure;
(5) embodiment
For example the present invention is done description in more detail below in conjunction with accompanying drawing:
In conjunction with Fig. 3-Fig. 5, first kind of embodiment of the present invention has the one dimension Airy optical fiber (comprising coating 1, covering 2 and fibre core array 3) that one group of one-dimensional linear array fibre core is arranged.End input Gauss light 4 to one section one dimension Airy optical fiber, optically-coupled by fibre core array 3, when intensity and the phase place of the outgoing light field 5 of the other end of this section one dimension Airy optical fiber just satisfies (or approximate satisfy) one dimension Airy function, the light field of one dimension Airy optical fiber outgoing will be equal to (or approximate being equal to) Airy light beam, it will inherit three big characteristics of (or heriding partially) Airy light beam, keep no diffraction to continue the transmission certain distance, and have the characteristic of freely accelerating.
In conjunction with Fig. 6-Fig. 8, second kind of embodiment of the present invention has the two-dimentional Airy optical fiber (comprising coating 1, covering 2 and fibre core array 3) that two groups of one-dimensional linear array fibre cores that intersect vertically are mutually arranged.Be different from one dimension Airy optical fiber, the no diffraction transmission range of two-dimentional Airy optical fiber end outgoing light field is farther.
The fibre core of first kind of embodiment is arranged and can be expanded to crossing or non-crossing the arranging of many group one-dimensional array fibre cores, as Fig. 9.Equally, the fibre core of second kind of embodiment is arranged and also can be expanded to crossing or non-crossing the arranging of many group two-dimensional array fibre cores, as Figure 10.Than the one dimension of single group or the two-dimensional array fibre core Airy optical fiber of arranging, many group one dimensions or the two-dimensional array fibre core Airy optical fiber of arranging can change the parameter (refractive index, core diameter and core are in the spacing of core) of every group of fibre core as required, there are certain light intensity difference or phase differential with the Airy light beam of realizing every group of fibre core outgoing, make the application of Airy optical fiber more extensive.
Airy fiber core arrangement mode is very huge to its no diffraction transmission range influence.Figure 11 represents that the fibre of the Airy optical fiber 9 of general single mode fiber 6, one dimension Airy optical fiber 7, two-dimentional Airy optical fiber 8, fibre core crossing distribution brings out the normalization light intensity of the transmission light field of penetrating light field and Airy light beam 10 with the variation relation of transmission range (Z).As can be seen from the figure, the no diffraction transmission range of the accurate Airy light beam of general one dimension or the outgoing of two-dimentional Airy optical fiber end is far longer than Gaussian beam (general single mode fiber brings out irradiating light beam can think Gaussian beam), and the no diffraction transmission range of the Airy optical fiber of some special constructions (as the Airy optical fiber 9 of the fibre core crossing distribution among the figure) outgoing beam even will be much larger than the Airy light beam, but because structural symmetry, this structure has lost the characteristic (as Figure 12) of free acceleration.
Embodiment 1:
1, light source coupling: get one section one dimension Airy optical fiber, the optical fiber coating of an end is dispeled, cut, aim at, weld with the single-mode fiber 11 of band light source tail optical fiber then, as shown in figure 13;
2, packaging protection: the quartz ampoule of internal diameter overgauge optical fiber or one dimension Airy optical fiber is transferred to figure solder joint 12 places, then at quartz ampoule two ends CO
2Laser instrument heating welded seal perhaps solidifies with epoxy encapsulation, carries out the secondary coating then and finishes Global Macros;
3, the Airy light beam generates: the other end (as the light beam exit end) optical fiber coating of one dimension Airy optical fiber is dispeled, cut, input laser 13, the light field 5 of observation one dimension Airy optical fiber exit end, if not satisfying Airy distributes, then continue cutting or grind optical fiber end, till the similarity maximum of outgoing light field 5 and Airy light beam.
Embodiment 2:
1, light source coupling: get one section fibre core multi-core fiber 14 corresponding with the Airy optical fiber of the non-crossing arrangement of many group one-dimensional array fibre cores, as shown in figure 14, the optical fiber coating of one end is dispeled, cut, aim at, weld with the single-mode fiber 11 of band light source tail optical fiber then, 15 places are heated to soft state at solder joint shown in Figure 14, draw awl then, and carry out optical power monitoring, till the luminous power that is coupled to multi-core fiber reaches maximum;
2, packaging protection 1: internal diameter is transferred to 16 places, cone coupled zone shown in Figure 15 greater than the quartz ampoule of multi-core fiber or single-mode fiber, then at quartz ampoule two ends CO
2Laser instrument heating welded seal perhaps solidifies with epoxy encapsulation;
3, be of coupled connections: multi-core fiber other end coat is dispeled, cut, get the Airy optical fiber of the non-crossing arrangement of group one-dimensional array fibre core more than a section simultaneously, the optical fiber coating of an end is dispeled, cut, then they are aimed at, weld, as shown in figure 15;
4, packaging protection 2: internal diameter is transferred to figure solder joint 17 places greater than the quartz ampoule of multi-core fiber or Airy optical fiber, then at quartz ampoule two ends CO
2Laser instrument heating welded seal perhaps solidifies with epoxy encapsulation, carries out the secondary coating then and finishes Global Macros;
5, the Airy light beam generates: input laser 13, the light field 5 of observation Airy optical fiber exit end distributes as if not satisfying Airy, then continues cutting or grinds optical fiber end, till the similarity maximum of outgoing light field 5 and Airy light beam.
Embodiment 3:
One dimension Airy optical fiber among embodiment 1 and the embodiment 2 can be replaced by two-dimentional Airy optical fiber, as Figure 16 and Figure 17.
Claims (6)
1. the Airy optical fiber based on array multi-core is made of coating, covering, one or more groups array core, it is characterized in that: the spatial arrangement of described each group pattern core of Airy optical fiber satisfies or approximately satisfies the Airy function, and the Airy optical fiber that always has a certain length, when to optical fiber one end input Gaussian beam, by the optically-coupled between the fibre core, the light distribution of the outgoing beam of each group pattern core of the optical fiber other end is all satisfied or the approximate light distribution of being satisfied with the Airy light beam.
2. a kind of Airy optical fiber based on array multi-core according to claim 1, it is characterized in that: the length value of the Airy optical fiber of described a certain length depends on the core diameter of the index distribution of optical fiber, each fibre core and the spacing between the fibre core.
3. a kind of Airy optical fiber based on array multi-core according to claim 1, it is characterized in that: the geometry distribution characteristics of described one group of fiber cores is: two or more solid fibre core one-dimensional linear array distribution.
4. according to any one described Airy optical fiber based on array multi-core of claim 1-3, it is characterized in that: the geometry distribution characteristics of described many group patterns core is: two groups or more one-dimensional linear array fibre core intersects or non-crossing arrangement.
5. according to any one described a kind of Airy optical fiber based on array multi-core of claim 1-4, it is characterized in that: the shape of described fiber cores is: circular, oval and other is polygonal a kind of.
6. according to any one described a kind of Airy optical fiber based on array multi-core of claim 1-5, it is characterized in that: the feature of the transmission mode of described fiber cores is: single mode or multimode.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109709708A (en) * | 2019-03-11 | 2019-05-03 | 西北工业大学 | A kind of liquid crystal Dammam cube phase-plate, preparation method and generation system |
| CN112363320A (en) * | 2020-09-27 | 2021-02-12 | 四川长虹电器股份有限公司 | Optical fiber vortex optical beam generator and preparation method thereof |
| CN113900175A (en) * | 2021-10-12 | 2022-01-07 | 桂林电子科技大学 | Single-mode and few-mode hybrid integrated multi-core optical fiber channel splitter and preparation method thereof |
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| WO2011124671A1 (en) * | 2010-04-08 | 2011-10-13 | Trumpf Laser Und Systemtechnik Gmbh | Method and arrangement for generating a laser beam having a differing beam profile characteristic by means of a multi-clad fibre |
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| CN1967302A (en) * | 2006-11-17 | 2007-05-23 | 哈尔滨工程大学 | Single fiber and multi-core fiber coupler and fused biconic taper coupling method thereof |
| WO2011124671A1 (en) * | 2010-04-08 | 2011-10-13 | Trumpf Laser Und Systemtechnik Gmbh | Method and arrangement for generating a laser beam having a differing beam profile characteristic by means of a multi-clad fibre |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109709708A (en) * | 2019-03-11 | 2019-05-03 | 西北工业大学 | A kind of liquid crystal Dammam cube phase-plate, preparation method and generation system |
| CN109709708B (en) * | 2019-03-11 | 2021-05-25 | 西北工业大学 | Liquid crystal Dammann cubic phase plate, preparation method and generation system |
| CN112363320A (en) * | 2020-09-27 | 2021-02-12 | 四川长虹电器股份有限公司 | Optical fiber vortex optical beam generator and preparation method thereof |
| CN112363320B (en) * | 2020-09-27 | 2022-02-01 | 四川长虹电器股份有限公司 | Optical fiber vortex optical beam generator and preparation method thereof |
| CN113900175A (en) * | 2021-10-12 | 2022-01-07 | 桂林电子科技大学 | Single-mode and few-mode hybrid integrated multi-core optical fiber channel splitter and preparation method thereof |
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Application publication date: 20130814 |