CN104914507B - A kind of micro-nano fiber wave filter - Google Patents
A kind of micro-nano fiber wave filter Download PDFInfo
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- CN104914507B CN104914507B CN201510295510.0A CN201510295510A CN104914507B CN 104914507 B CN104914507 B CN 104914507B CN 201510295510 A CN201510295510 A CN 201510295510A CN 104914507 B CN104914507 B CN 104914507B
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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
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29304—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating
- G02B6/29316—Light guides comprising a diffractive element, e.g. grating in or on the light guide such that diffracted light is confined in the light guide
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Light Guides In General And Applications Therefor (AREA)
- Diffracting Gratings Or Hologram Optical Elements (AREA)
Abstract
The present invention is to provide a kind of micro-nano fiber wave filter.Including quartz capillary [1], micro-nano fiber [2], the first liquid [3], second liquid [4], encapsulating structure [5], micro-nano fiber [2], the first liquid [3] and second liquid [4] are encapsulated in quartz capillary [1], and the first liquid [3], second liquid [4] are filled in around micro-nano fiber [2] and be alternately arranged.The micro-nano fiber wave filter of the present invention, when the partial mode of micro-nano fiber meets the phase-matching condition with liquid level, it will be coupled into liquid level, remaining core mode continues to propagate, and realizes filter function.By changing the refractive index or thickness of liquid level, can control that Different lightwave in optical fiber grows by property, so as to realize the filter function of tunable wave length.Tuning range of the invention to wavelength is wider, method is easier, controllability is higher, is easily combined with micro flow chip, has broad application prospects.
Description
Technical field
The present invention relates to optical fiber filter, specifically a kind of micro-nano fiber wave filter.
Background technology
Optical fiber filter can carry out the device that pass through of selectivity as a kind of to optical signal, be mainly used in fiber optic communication,
Fibre Optical Sensor and optical information processing etc..Optical fiber filter is due to insertion loss is low, centre wavelength is tunable, structure is tight
Gather, high-frequency response, the features such as being easy to the system integration such as optic communication, Fibre Optical Sensor, obtain the favor of various regions researcher,
The optical fiber filter type developed at present mainly has：Optical fiber filter based on coupler, the optical fiber based on fiber grating
Wave filter, the optical fiber filter based on fibre optic interferometer, acousto-optic filter based on acousto-optic modulation mechanism etc..
Traditional grating writing method mainly has：Transverse side exposure method, phase masks and point-to-point writing method etc.,
L.K.Chin et al. is in its article An on-chip liquid tunable grating using multiphase
A kind of modulated long-period gratings based on multiphase drop are proposed in droplet microfluidics, can effectively, flexibly
Realize filter function.
The content of the invention
It is an object of the invention to provide a kind of structural parameters real-time, tunable, make micro-nano fiber simple, that cost is cheap
Wave filter.
The object of the present invention is achieved like this：Including quartz capillary 1, micro-nano fiber 2, the first liquid 3, second liquid
4th, encapsulating structure 5, micro-nano fiber 2, the first liquid 3 and second liquid 4 are encapsulated in quartz capillary 1, the first liquid 3,
Two liquid 4 are filled in around micro-nano fiber 2 and are alternately arranged.
The present invention can also include：
1st, the diameter of described micro-nano fiber 2 is less than 10 μm, draws cone to form by single-mode fiber.
2nd, the first liquid 3, the objectionable intermingling of second liquid 4, the first liquid 3 are different from the refractive index of second liquid 4.
The present invention looks for another way, and micro-nano fiber characteristic is combined with the filtering of different liquids layer, proposes a kind of different refractions
The liquid level of rate is filled in around micro-nano fiber, the micro-nano fiber grating filter structure being arranged alternately according to certain rules, when micro-
When the partial mode of nano fiber meets the phase-matching condition with liquid level, will be coupled into liquid level, remaining core mode after
Resume and broadcast, realize filter function.By changing the refractive index or thickness of liquid level, Different lightwave length in optical fiber can be controlled
By property, so as to realize the filter function of tunable wave length.Compared to traditional fiber grating filter, the present invention is to wavelength
Tuning range is wider, method is easier, controllability is higher, is easily combined with micro flow chip, has broad application prospects.
The advantage of the invention is that：
1st, micro-nano fiber wave filter of the invention, parameter can be matched by the refractive index to liquid level or thickness etc. and carried out
Change, realize multi-wavelength filter function.
2nd, fiber grating filter favorable repeatability of the invention, compensate for the not reproducible of conventional fiber grating filter
Property defect, change the refractive index or thickness of liquid level, be equivalent to adjust the parameter of grating, so as to realize that different filtering needs
Ask.
3rd, micro-nano fiber wave filter of the invention is easily combined with micro flow chip, and simple in construction, easily controllable, cost is cheap,
Have broad application prospects.
Brief description of the drawings
Fig. 1 micro-nano fiber Bragg grating filter schematic diagrames.
Fig. 2 long period micro-nano fiber grating filter schematic diagrames.
Embodiment
The present invention a kind of micro-nano fiber wave filter composition include quartz capillary 1, micro-nano fiber 2, the first liquid 3,
Second liquid 4, encapsulating structure 5.Micro-nano fiber 2, the first liquid 3, second liquid 4 are encapsulated in quartz capillary 1.First liquid
Body 3, second liquid 4 are filled in around micro-nano fiber 2, are alternately arranged.The internal diameter of quartz capillary 1, length need to be with liquid gratings
Match parameters.The diameter of micro-nano fiber 2 be less than 10 μm, by single-mode fiber draw taper into.First liquid 3, both second liquids 4
Objectionable intermingling, has different refractivity, and liquid layer thickness meets filtering condition according to certain rule periodic arrangement.
Illustrate below in conjunction with the accompanying drawings and the present invention is described in more detail.
With reference to Fig. 1, from the quartz capillary that internal diameter is 0.2mm, it is 0.5 μm, grating length to control the raster grid cycle
For 10mm, refractive index modulation depth 2*10-4, can obtain micro-nano fiber Bragg light of the reflection kernel wavelength in 1467nm or so
Grating filter, implementation steps are as follows：
1st, cone is drawn：Take the single-mode fiber of one section of about 1m length, in single-mode fiber center section, the coat 20-- of peeling optical fibre
30mm, alcohol and ether mixed liquor are dipped using non-woven fabrics, is wiped repeatedly optical fiber jacket, until cleaning, then by optical fiber two
End is fixed on fiber clamp, and the fiber area for removing coat is preheated with high temperature heat source, treats that optical fiber enters molten
After state, optical fiber is stretched with the fiber clamp of left and right ends, while high temperature heat source left and right centered on preheating zone comes and goes and moved
Dynamic, stretching forms micro-nano fiber 2.
2nd, under the microscope, micro-nano fiber 2 is penetrated into the quartz capillary 1 that length is 10mm.
3rd, micro syringe is controlled with Micropump, by the first liquid 3 that refractive index is 1.468, refractive index are 1.4682 the
Two liquid 4 alternately inject quartz capillary 1.
4th, with encapsulating structure 5, such as epoxy, by the sealing two ends of quartz capillary 1.
Embodiment 2
With reference to Fig. 2, from the quartz capillary that internal diameter is 0.2mm, to control screen periods be 480 μm, grating length is
24mm, refractive index modulation depth 2*10-4, can obtain corresponding to wave filter of the resonance wavelength in 1.44um or so.
1st, cone is drawn：Take the single-mode fiber of one section of about 1m length, in single-mode fiber center section, the coat 20-- of peeling optical fibre
30mm, alcohol and ether mixed liquor are dipped using non-woven fabrics, is wiped repeatedly optical fiber jacket, until cleaning, then by optical fiber two
End is fixed on fiber clamp, and the fiber area for removing coat is preheated with high temperature heat source, treats that optical fiber enters molten
After state, optical fiber is stretched with the fiber clamp of left and right ends, while high temperature heat source left and right centered on preheating zone comes and goes and moved
Dynamic, stretching forms micro-nano fiber 2.
2nd, under the microscope, micro-nano fiber 2 is penetrated into the quartz capillary 1 that length is 24mm.
3rd, micro syringe is controlled with Micropump, by the first liquid 3 that refractive index is 1.4817, refractive index are 1.4819 the
Two liquid 4 alternately inject quartz capillary 1.
4th, with encapsulating structure 5, such as epoxy, by the sealing two ends of quartz capillary 1.
Claims (1)
1. a kind of micro-nano fiber wave filter, including quartz capillary (1), micro-nano fiber (2), the first liquid (3), second liquid
(4), encapsulating structure (5), it is characterized in that：Micro-nano fiber (2), the first liquid (3) and second liquid (4) are encapsulated in quartzy capillary
Manage in (1), the first liquid (3), second liquid (4) are filled in around micro-nano fiber (2) and be alternately arranged；
The diameter of described micro-nano fiber (2) is less than 10 μm, draws cone to form by single-mode fiber；
First liquid (3), second liquid (4) objectionable intermingling, the first liquid (3) are different from the refractive index of second liquid (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510295510.0A CN104914507B (en) | 2015-06-02 | 2015-06-02 | A kind of micro-nano fiber wave filter |
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| CN201510295510.0A CN104914507B (en) | 2015-06-02 | 2015-06-02 | A kind of micro-nano fiber wave filter |
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| CN104914507A CN104914507A (en) | 2015-09-16 |
| CN104914507B true CN104914507B (en) | 2018-03-13 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106154405B (en) * | 2016-08-25 | 2019-09-03 | 上海交通大学 | A kind of implementation method of Novel Long Period Fibre Gratings |
| CN110426781B (en) * | 2019-08-05 | 2020-12-01 | 燕山大学 | Liquid cladding micro-nano fiber long-period grating with adjustable broadband |
| CN111157490B (en) * | 2020-01-08 | 2022-09-30 | 暨南大学 | Micro-nano optical fiber long-period grating refractive index sensor |
| CN112964361B (en) * | 2021-02-05 | 2022-12-02 | 上海新产业光电技术有限公司 | Tunable filter, spectrum detection device and spectrum information acquisition method |
| CN114607942B (en) * | 2022-04-21 | 2024-04-26 | 国仪量子技术(合肥)股份有限公司 | Liquid delivery control method and resonant cavity liquid delivery system |
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| CN102141602A (en) * | 2010-02-01 | 2011-08-03 | 陆樟献 | Magnetic field sensor and magnetic field tester |
| US20120231489A1 (en) * | 2011-03-11 | 2012-09-13 | Florida State University Research Foundation | Iridescent surfaces and apparatus for real time measurement of liquid and cellular adhesion |
| CN103076303A (en) * | 2012-12-03 | 2013-05-01 | 中国计量学院 | Stress long-period fiber grating liquid refraction index sensor based on side hole single-mode fiber |
| CN104316996B (en) * | 2014-11-03 | 2018-01-16 | 东南大学 | A kind of polymer integrated waveguide Bragg grating refractive index sensor |
| CN204679683U (en) * | 2015-06-02 | 2015-09-30 | 哈尔滨工程大学 | A kind of micro-nano fiber wave filter |
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