CN102737713B - Based on the two-dimentional integrated form optical fiber on-line memory of linear array multi-core fiber - Google Patents
Based on the two-dimentional integrated form optical fiber on-line memory of linear array multi-core fiber Download PDFInfo
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- CN102737713B CN102737713B CN201210235572.9A CN201210235572A CN102737713B CN 102737713 B CN102737713 B CN 102737713B CN 201210235572 A CN201210235572 A CN 201210235572A CN 102737713 B CN102737713 B CN 102737713B
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Abstract
The present invention is to provide a kind of two-dimentional integrated form optical fiber on-line memory based on linear array multi-core fiber.Connect one section of array multi-core side polishing fibre (2) by single-mode fiber (7) to form, utilize optics micro-processing technology to form metal gradient optical grating construction (4) on exposed multiple fibre cores (3) surface.Principle of the present invention is based on rainbow local effect, namely the effect of dispersion of gradient grating is utilized by the phasmon resonance local of different wave length in different locus, the light of different-waveband throws the different two-dimensional spatial location of plane by being parked in optical fiber side, can realize the light signal online two-dimensional storage of visible ray to infrared band.This device volume is little, and structure is simple, and integrated level is high, is easy to realize all-fiber integrated, in optical fiber on-line storage field, have important application.
Description
Technical field
What the present invention relates to is a kind of optical fiber on-line memory, particularly a kind of two-dimentional integrated form optical fiber on-line memory based on linear array multi-core fiber, is mainly used in the wave filter in optical storage and communication.
Background technology
Surface plasma excimer (Surface Plasmon Polaritons, SPPs) to be interacted a kind of coherence resonance formed by external electromagnetic field and metal surface free electron, has huge local field enhancement effect.It can overcome diffraction limit, produces the optical phenomena of many novelties, as negative refraction, ultrahigh resolution imaging, transmission enhancing etc.The phenomenon of these complexity likely imply that new principle, new theory, new technology.When changing metallic surface structures, the character, dispersion relation, excitation mode, coupling effect etc. of surface plasma excimer all will produce great change.By the interphase interaction of SPPs and light field, the active manipulation that light is propagated can be realized.The photonic device utilizing surface plasma excimer to develop has obvious advantage in miniaturization.SPPs is Development of Novel photonic device, wideband communication system, surface plasma photon chip, small photon circuit, modulator and switch, data storage, microscope, new type light source, solar cell, novel photon sensor etc. provide possibility.At present, one of research direction with the fastest developing speed in optics and photonics is become based on the subwavelength optics of SPPs.The optical device of metal surface plasma body receives increasing concern.
Optical fiber surface plasmon sensor (see U.S. Patent No. 5,647,030 and No.5,327,225) also has a lot of report.Utilize metal grating to realize coupling excitating surface plasmon and also have report, but be all for unimodal wavelength-modulated device, be transmission or reflective devices, do not there is memory function.Rainbow capture effect conventional waveguide substrate utilizing the surface plasma of metal micro-nano optical grating construction produce has obtained experimental verification (Applied Physics Letters at visible light wave range, 2011,98,251103), this effect will be significant in optical storage of future generation.But current structure is difficult to carry out interconnected with existing optical communication system, and majority is one dimension constraint, rainbow local effect is applied in optical fibre device and have not been reported.
Summary of the invention
The object of the present invention is to provide and a kind ofly can realize the two-dimentional integrated form optical fiber on-line memory based on linear array multi-core fiber of visible ray to the online two-dimensional storage of light signal of infrared band.
The object of the present invention is achieved like this:
Two-dimentional integrated form optical fiber on-line memory based on linear array multi-core fiber connects one section of array multi-core side polishing fibre 2 by single-mode fiber 7 and forms, and utilizes optics micro-processing technology to form metal gradient optical grating construction 4 on exposed multiple fibre cores 3 surface.
Described graded metal optical grating construction 4 is the graded metal optical grating constructions directly making projection at the long and slender wicking surface of side polishing; Or flush type metal grating structure, namely first utilize photoetching technique to carve the microflute of gradient optical grating construction at the long and slender wicking surface of side polishing, then deposit metal in microflute.
Described graded metal optical grating construction refers to that the grid width t of metal grating periods lambda and metal grating unit 5 is definite values, and the grid height h of metal grating unit 5 is graded.
Metal material is gold, silver, aluminium etc.
Metal grating 4 periods lambda scope 200-700 nanometer, the grid height h of metal grating unit 5 is 5-1000 nanometer, and the grid width t of metal grating unit 5 is 10-300 nanometer.
Array multi-core fiber is realized by fused biconical taper in the less side of array multi-core fiber graded metal grating height h and single-mode fiber with being coupled of single-mode fiber.
Metal gradient optical grating construction on each fibre core of array multi-core side polishing fibre 2 has identical gradient.
The gradient of the metal gradient optical grating construction on each fibre core of array multi-core side polishing fibre 2 is different.
Each fiber core distance of described array multi-core fiber d value is comparatively large, ensures between each fibre core without crosstalk; The size of each fibre core can be identical, also can be different; The refractive index of each fibre core can be identical, also can be different.
The principle of the two-dimentional integrated form optical fiber on-line memory based on rainbow local effect of all-fiber of the present invention is different from traditional optical memory, it is based on rainbow local effect, namely gradient grating is utilized by the phasmon resonance local of different wave length in different locus, the light of different-waveband will be parked in different two-dimensional spatial location, can realize the light signal online two-dimensional storage of visible ray to infrared band.
Compared with prior art, advantage of the present invention is:
1, this memory size is little, and structure is simple, is easy to realize all-fiber integrated, carries out interconnected with existing fiber technology, in optical fiber on-line storage field, have important application;
2, this storer can realize the light signal on-line storage of visible ray to infrared band;
3, can to realize two-dimentional on-line storage integrated for this storer.
Accompanying drawing explanation
Fig. 1 (a) is the optical-fiber two-dimensional on-line memory structural representation of graded metal grating raised structures;
Fig. 1 (b) is the optical-fiber two-dimensional on-line memory side throwing figure of metal grating raised structures;
Fig. 1 (c) is metal grating cell schematics;
Fig. 1 (d) is the optical-fiber two-dimensional on-line memory vertical view of metal grating raised structures;
Fig. 1 (e) is that multi-core fiber xsect is thrown in side;
Fig. 1 (f) is single-mode fiber and the schematic diagram that is coupled of multi-core fiber;
Fig. 2 (a) is the array multi-core fiber xsect that each fibre core has same size;
Fig. 2 (b) is the array multi-core fiber xsect of each core size mechanical periodicity;
Fig. 2 (c) is the array multi-core fiber xsect of the linear change of each core size;
Fig. 3 (a) is the vertical view that metal gradient optical grating construction on each fibre core has different gradient;
Fig. 3 (b) is the side throwing figure of the metal gradient grating on fibre core 4-1;
Fig. 3 (c) is the side throwing figure of the metal gradient grating on fibre core 4-2;
Fig. 4 is metal grating flush type two dimension on-line memory side throwing figure.
Embodiment
Below in conjunction with accompanying drawing citing, the present invention is described in more detail:
Embodiment 1:
Based on linear array multi-core fiber two-dimentional integrated form optical fiber on-line memory structure as shown in Figure 1, connect one section of array 7 core fibre 1 by single-mode fiber 7 to form, wherein array 7 core fibre 1 is processed to side polishing fibre 2, namely fibre cladding 5 and fibre core are all by jettisoning half, are exposed to extraneous multiple fibre cores 3 and utilize optics micro-processing technology to form the metal gradient optical grating construction 4 of projection on surface.7 fibre cores 3 have identical refractive index and identical size, core diameter 4000 nanometer, and the graded metal grating on 7 fibre core surfaces is all identical, and the grid width t of its periods lambda and metal grating unit 5 is definite value, are respectively 340 nanometers and 110 nanometers.In grid height 5-785 nanometer totally 40 cycles of metal grating unit 5, grid high gradient is 20 nanometers.Array multi-core fiber 1 and the coupling of single-mode fiber 7 make each fibre core power identical in the less side of array multi-core fiber graded metal grating height h and single-mode fiber by fused biconical taper.Multi wave length illuminating source injects from single-mode fiber one end, the light of different wave length by by local in different locus, the shorter light of wavelength is parked in the less side of metal grating height h, wavelength X
1and λ
2be parked in fiber axis respectively to diverse location, realize two-dimentional on-line storage.
Embodiment 2:
Based on linear array multi-core fiber two-dimentional integrated form optical fiber on-line memory structure as shown in figs. 1 and 4, connect one section of array 5 core fibre 1 by single-mode fiber 7 to form, wherein array 5 core fibre 1 is processed to side polishing fibre 2, namely fibre cladding 5 and fibre core are all by jettisoning half, are exposed to extraneous multiple fibre cores 3 and utilize optics micro-processing technology to form flush type metal gradient optical grating construction 4 on surface.5 fibre cores have identical refractive index but different sizes, and core diameter is from 3000-4000 nanometer, and the graded metal grating on 5 fibre core surfaces is all identical, and the grid width t of its periods lambda and metal grating unit 5 is definite value, is respectively 340 nanometers and 110 nanometers.In grid height 5-785 nanometer totally 40 cycles of metal grating unit 5, grid high gradient is 20 nanometers.Array multi-core fiber 1 and the coupling of single-mode fiber 7 make each fibre core power identical in the less side of array multi-core fiber graded metal grating height h and single-mode fiber by fused biconical taper.Multi wave length illuminating source injects from single-mode fiber one end, and because each core size is different, its corresponding effective refractive index can be different, the light of different wave length by by local at different two-dimensional spatial location, wavelength X
1and λ
2be parked in the diverse location that face thrown by optical fiber respectively, realize real two-dimentional on-line storage.
Embodiment 3:
Based on linear array multi-core fiber two-dimentional integrated form optical fiber on-line memory structure as shown in figs. 1 and 3, connect one section of array 5 core fibre 1 by single-mode fiber 7 to form, wherein array 5 core fibre 1 is processed to side polishing fibre 2, namely fibre cladding 5 and fibre core are all by jettisoning half, are exposed to extraneous multiple fibre cores 3 and utilize optics micro-processing technology to form flush type metal gradient optical grating construction 4 on surface.5 fibre cores have identical refractive index and identical size, and core diameter is 4000 nanometers, and its periods lambda of graded metal grating on 5 fibre core surfaces and the grid width t of metal grating unit 5 are definite value, are respectively 340 nanometers and 110 nanometers.But metal grating grid high gradient is different.Array multi-core fiber 1 and the coupling of single-mode fiber 7 make each fibre core power identical in the less side of array multi-core fiber graded metal grating height h and single-mode fiber by fused biconical taper.Multi wave length illuminating source injects from single-mode fiber one end, and because of each fibre core surface grating 4-1,4-2,4-3,4-4,4-5 grid high gradient is different, and the dispersion of each fibre core metal grating is also different, the light of different wave length by by local at different two-dimensional spatial location, wavelength X
1, λ
2, λ
3and λ
4be parked in the diverse location that face thrown by optical fiber respectively, realize real two-dimentional on-line storage.
Claims (5)
1. the two-dimentional integrated form optical fiber on-line memory based on linear array multi-core fiber, it is characterized in that: connect one section of circular array multicore side polishing fibre (2) by circular single-mode fiber (7) and form, utilize optics micro-processing technology to form graded metal optical grating construction (4) on exposed multiple fibre cores (3) surface; Described graded metal optical grating construction (4) is the graded metal optical grating construction directly making projection at the long and slender wicking surface of side polishing; Or flush type graded metal optical grating construction, namely first utilize photoetching technique to carve the microflute of gradient optical grating construction at the long and slender wicking surface of side polishing, then deposit metal in microflute; Described graded metal optical grating construction refers to that the grid width t of metal grating periods lambda and metal grating unit (5) is definite value, and the grid height h of metal grating unit (5) is graded.
2. the two-dimentional integrated form optical fiber on-line memory based on linear array multi-core fiber according to claim 1, it is characterized in that: graded metal optical grating construction (4) periods lambda scope 200-700 nanometer, the grid height h of metal grating unit (5) is 5-1000 nanometer, and the grid width t of metal grating unit (5) is 10-300 nanometer.
3. the two-dimentional integrated form optical fiber on-line memory based on linear array multi-core fiber according to claim 2, is characterized in that: the polishing of array multi-core side is fine is realized by fused biconical taper in the less side of the grid height h of the metal grating unit of array multi-core side polishing fibre and single-mode fiber with being coupled of single-mode fiber.
4. the two-dimentional integrated form optical fiber on-line memory based on linear array multi-core fiber according to claim 3, is characterized in that: the graded metal optical grating construction on each fibre core of array multi-core side polishing fibre (2) has identical gradient.
5. the two-dimentional integrated form optical fiber on-line memory based on linear array multi-core fiber according to claim 3, is characterized in that: the gradient of the graded metal optical grating construction on each fibre core of array multi-core side polishing fibre (2) is different.
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| CN102842744B (en) * | 2012-09-21 | 2015-06-17 | 东南大学 | Adjustable and controllable rainbow local area network controller |
| CN104157934B (en) * | 2014-07-21 | 2016-05-04 | 南京航空航天大学 | A kind of ultra broadband artificial surface plasma wave filter |
| CN107315223B (en) * | 2017-07-14 | 2019-11-15 | 上海交通大学 | Collect the optical interconnection device of Polarization filter and interlayer equalization coupler |
| CN111048133B (en) * | 2019-11-12 | 2021-10-22 | 武汉大学 | Optical storage device and method based on metal super-surface structure |
| CN114142921B (en) * | 2021-12-09 | 2023-02-28 | 中山水木光华电子信息科技有限公司 | All-optical storage system and method based on different central wavelength optical fiber codes |
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| CN201382778Y (en) * | 2009-04-22 | 2010-01-13 | 东南大学 | Measuring transducer used for simultaneously measuring strain and temperature of fiber grating |
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| CN201382778Y (en) * | 2009-04-22 | 2010-01-13 | 东南大学 | Measuring transducer used for simultaneously measuring strain and temperature of fiber grating |
Non-Patent Citations (2)
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| 基于金属纳米结构的光波传输与远场超分辨成像;陈林;《中国优秀博士学位论文全文库》;20101015;第43-60页 * |
| 平行阵列芯光纤的超模耦合特性;朱晓亮 等;《中国激光》;20110731;第38卷(第7期);第1-5页 * |
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