CN106124478A - The fiber Raman of tapered fiber and microspheres lens strengthens probe and manufacture method - Google Patents
The fiber Raman of tapered fiber and microspheres lens strengthens probe and manufacture method Download PDFInfo
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- CN106124478A CN106124478A CN201610688469.8A CN201610688469A CN106124478A CN 106124478 A CN106124478 A CN 106124478A CN 201610688469 A CN201610688469 A CN 201610688469A CN 106124478 A CN106124478 A CN 106124478A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/65—Raman scattering
- G01N21/658—Raman scattering enhancement Raman, e.g. surface plasmons
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Abstract
The fiber Raman that the invention discloses a kind of tapered fiber and microspheres lens strengthens probe and manufacture method, draws the optical fiber of cone including one end, the orange of micro-meter scale, and connects the most advanced and sophisticated glue with ball of tapered fiber.One-wavelength laser is coupled into optical fiber from one end of optical fiber, arrives optical fiber and draws one end of cone, and draws the ball lens of cone end to converge to sample surfaces by being fixed on.Detection light can be focused into elongated light beam by this probe, and focusing width of light beam is sub-wavelength dimensions, length about wavelength 3 times.As Raman microprobe, elongated focusing light beam can excite more molecules detected, the width of sub-wavelength can improve the spatial resolution of detection, simultaneously because use tapered fiber to be coupled in microsphere, refocusing is to sample, reduce the irradiation area of exciting light, only focus and have the exciting light of enhancing, be conducive to improving spatial resolution and the signal to noise ratio of Raman detection.
Description
Technical field
The present invention relates to a kind of fiber Raman probe based on tapered fiber and microsphere lens, further relate to its processing and fabricating side
Method, belongs to Raman spectrum analysis technical field.
Background technology
Generally utilize Raman spectroscopy can identify material composition very easily, but for a lot of changes
Learn material and directly cannot detect signal by Raman spectrum, need, by Raman enhancement techniques, to improve Raman signal signal to noise ratio,
Thus detect material to be checked.Strengthen Raman scattering to be strengthened by surface substrate, it is also possible to by using probe structure to increase
By force, surface substrate enhancement effect refers in some metal good conductor surfaces or colloidal sol of special preparation, in excitation area, by
Enhancing in sample surfaces or the electromagnetic field of near surface causes the Raman scattering signal of binding molecule to scatter (NRS) than normal Raman
The phenomenon that signal is greatly enhanced.Probe strengthens generally has needle point Raman to strengthen, uses metal needle point, utilizes local surface etc. from sharp
The local electric field that unit is formed strengthens, and increases Raman signal.
Surface-enhanced Raman and the enhancing of needle point Raman all overcome the shortcoming that Raman spectrum sensitivity is low, it is possible to obtain conventional
The structural information that Raman spectrum is difficult to obtain, is widely used in study of surfaces, absorption interface apparent condition research, biological size
The interface orientation of molecule and configuration, conformation research, structural analysis etc., can effectively the analysis of compounds gas absorption quantity at interface,
The change of ADSORPTION STATE, interface information etc..Making can strengthen the substrate always people of Raman signal to a greater extent and make great efforts to chase after
The target asked.
The SERS mechanism that academic circles at present is generally admitted mainly has physics to strengthen mechanism and Chemical enhancement mechanism two class.
One is Electromagnetic enhancement (Electromagnetic enhancement, EM) mechanism: surface plasma body resonant vibration
The local Electromagnetic enhancement that (Surface plasmon resonance, SPR) causes is considered as topmost contribution, surface
Plasma is the oscillation effect that the free electron in metal occurs collectivity under optical electric field.Due to 3 kinds of IB of Cu, Ag and Au
The d electronics of race's metal is compared bigger with the energy gap of s electronics with transition metal so that they are not susceptible to band-to-band transition.If it is right
These 3 kinds of metal systems select suitable excitation wavelength, just can avoid being converted by light absorbing energy because there is band-to-band transition
For heat etc., thus trend towards realizing efficient SPR scattering process.
Another kind is chemical interaction, mainly shows as during Raman electron density deformation difficulty or ease journey under optical electric field
Degree.When molecular chemisorption is in substrate surface, surface, adatom and other co-adsorption species etc. all may be with molecules
Having certain chemical action, these factors have directly impact, the i.e. change to system polarizability to the electron density distribution of molecule
Change and affect its Raman intensity.
Prior art strengthens local electricity frequently with metallic particles and periodically metal or semiconductor structure as substrate
Field intensity, thus strengthen SERS signal, but the SERS of this technology enhancing spatial uniformity is low, thus acquisition that can not be stable
The Raman signal of high spatial resolution；And the pinpoint enhanced Raman signal used at present, it is based primarily upon metallic, due near field
Effect, its investigation depth is little, for biological tissue, it is difficult to detect the Raman signal of interior molecules.
Summary of the invention
Technical problem: it is an object of the invention to overcome deficiency of the prior art, propose a kind of based on tapered fiber and
The fiber Raman of microspheres lens strengthens probe and manufacture method, solves the Raman spectrum test space in prior art and differentiates
The problem that rate is low and investigation depth is shallow.
Technical scheme: the fiber Ramans based on tapered fiber and microspheres lens of the present invention strengthen probe and include one section
Tapered fiber, the orange of micro-meter scale, the optical fiber as tapered fiber is single mode or multimode Optic transmission fiber, draws cone length 100 μ
M-1000 μm, cone is suitable, for 2-5 μm with the orange diameter of micro-meter scale.
Wherein:
The orange material of micro-meter scale is SiO2Or TiO2。
The orange of described tapered fiber and micro-meter scale be connected by epoxide-resin glue or ultra-violet curing glue.
The fiber Ramans based on tapered fiber and microspheres lens of the present invention strengthen the manufacture method of probe include with
Lower step:
Step one. taking one section of optical fiber, one end removal coat is after it cleans, dries up, with flame or heating ceramic ring
Add the optical fiber end after thermal cleaning, draw and attenuate, cutting；
Step 2, disperses the orange of micro-meter scale on a planar base, moves tapered fiber with D translation device,
The orange of alignment micro-meter scale, with another root optical fiber probe point glue, sticks in orange and the tapered fiber of micro-meter scale
Together, ultra-violet curing several minutes.
One-wavelength laser is coupled into optical fiber from one end of optical fiber, arrives optical fiber and draws one end of cone, and draws cone by being fixed on
Most advanced and sophisticated ball lens converge to sample surfaces.Detection light can be focused into elongated light beam by this probe, focuses on width of light beam
For sub-wavelength dimensions, length about wavelength 3 times.
Beneficial effect: compared with prior art, the invention have the advantage that
1) a kind of based on tapered fiber and microspheres lens the fiber Ramans of the present invention strengthen probe, by by monochrome
Laser is coupled into optical fiber from one end of optical fiber, arrives optical fiber and draws one end of cone, and saturating by being fixed on the ball drawing cone end
Mirror converges to sample surfaces.Detection light can be focused into elongated light beam by this probe, and focusing width of light beam is sub-wavelength dimensions,
Length about wavelength 3 times.This probe can improve spatial resolution and the investigation depth of Raman detection.
2) present invention probe use optical fiber draw cone posterior synechiae microsphere method prepare, the microsphere prepared with draw cone light
Fibre is tightly combined, good mechanical property, difficult drop-off, and the size of microsphere is controlled simultaneously, it is adaptable to different excitation wavelengths, has good
Good repeatability, arrives good Effect on Detecting；Structural parameters and the material of optical fiber select the most flexibly, therefore this
The bright suitability is strong.
Accompanying drawing explanation
Fig. 1 is the structural representation of probe of the present invention；
Fig. 2 is the schematic flow sheet of the manufacture method of invention probe of the present invention；
Figure has: tapered fiber 1, ultra-violet curing glue 2, the orange 3 of micro-meter scale, ordinary optic fibre 4.
Detailed description of the invention
The invention will be further described below in conjunction with the accompanying drawings.Following example are only used for clearly illustrating the present invention
Technical scheme, and can not limit the scope of the invention with this.
As it is shown in figure 1, a kind of based on tapered fiber and microspheres lens the fiber Ramans of the present invention strengthen probe, bag
Include one section of one end and draw the optical fiber 1 of cone, the orange 3 of micro-meter scale, and connect the most advanced and sophisticated ultra-violet curing with ball of tapered fiber
Glue 2.Optical fiber is the Optic transmission fibers such as single mode, multimode, draws cone length 100 μm-1000 μm, cone and ball diameter suitable, about 3-5
μm, glue uses epoxide-resin glue or other ultra-violet curing glue.Ball material is SiO2Or TiO2Deng, its a diameter of 2 μm-5 μ
m。
A kind of based on tapered fiber and microspheres lens the fiber Ramans of the present invention strengthen the manufacture method bag of probe
Include following steps:
Step one, takes one section of ordinary optic fibre 4, and one end removal coat is after it cleans, dries up, with flame or heating pottery
Porcelain ring adds the optical fiber end after thermal cleaning, draws and attenuates, and cutting obtains tapered fiber 1；
Step 2, disperses on a planar base by the orange 3 of micro-meter scale, moves the light drawing cone with D translation device
Fibre, is directed at microsphere, with another root optical fiber probe point ultra-violet curing glue 2, microsphere and optical fiber is sticked together, ultra-violet curing number
Minute；
Embodiment one
Describe that to prepare the step of annular chamber SERS substrate as follows in conjunction with specific embodiments in detail:
A) taking a single-mode fiber (9/125 μm), coat is removed in one end, uses acetone (purity 99.7%), ethanol (pure respectively
Degree 99.9%), deionized water (resistivity 18.2M Ω) ultrasonic (40W) clean 10 minutes, then blow with nitrogen (purity 99.7%)
Dry；
B) the optical fiber two ends clip after processing is fixed, and heats with oxyhydrogen flame, stretching optical fiber simultaneously；
C) draw the tip of cone with cutter cutting optical fibre, make diameter about 2 μm of section；
D) configuration SiO2The colloid micro ball solution 2ml, wherein SiO of microsphere2A diameter of 2 μm of microsphere, diameter deviation rate 5%,
Concentration of volume percent is 0.005%, and solvent is deionized water；
E) by the SiO of d) middle configuration2Solution is spun on flat glass；
F) step e) midplane glass is placed on the sample stage of 3-dimensional probe platform；
G) optical fiber drawing cone is fixed on three-dimensional probe platform, mobile platform, makes tip and the micro-sphere contacts of probe, use
A small amount of ultraviolet photoresist is stained with by another root probe, and some glue is to drawing cone probe and microsphere junction, and ultra-violet curing 5min；
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For Yuan, on the premise of without departing from the technology of the present invention principle, it is also possible to make some improvement and modification, these improve and modification
Also should be regarded as protection scope of the present invention.
Claims (4)
1. fiber Ramans based on tapered fiber and microspheres lens strengthen probe, it is characterised in that this fiber Raman
Strengthen probe and include the orange (3) of one section of tapered fiber (1), micro-meter scale, as the optical fiber of tapered fiber (1) be single mode or
Multimode Optic transmission fiber, draws cone length 100 μm-1000 μm, and cone is suitable, for 2-5 μm with orange (3) diameter of micro-meter scale.
The fiber Raman of tapered fiber the most according to claim 1 and microspheres lens strengthens probe, it is characterised in that
Orange (3) material of micro-meter scale is SiO2Or TiO2。
Fiber Ramans based on tapered fiber and microspheres lens the most according to claim 1 and 2 strengthen probe, and it is special
Levy be described tapered fiber (1) and micro-meter scale orange (3) be connected by epoxide-resin glue or ultra-violet curing
Glue (2).
4. the making of fiber Ramans based on a tapered fiber and microspheres lens as claimed in claim 1 enhancing probe
Method, is characterized in that, the method comprises the following steps:
Step one. taking one section of optical fiber, one end removal coat, after it cleans, dries up, heats with flame or heating ceramic ring
Optical fiber end after cleaning, draws and attenuates, cutting；
Step 2, disperses the orange (3) of micro-meter scale on a planar base, moves tapered fiber with D translation device,
The orange (3) of alignment micro-meter scale, with another root optical fiber probe point glue, by orange (3) and the tapered fiber of micro-meter scale
It is sticked together, ultra-violet curing several minutes.
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107024734A (en) * | 2017-05-10 | 2017-08-08 | 北京航空航天大学 | A kind of sub-wavelength spot light bored based on micro-nano fiber and preparation method thereof |
| CN108152267A (en) * | 2018-01-31 | 2018-06-12 | 西北工业大学 | A kind of method of efficient excitation metallized optical fibre Surface enhanced Raman scattering |
| CN108426869A (en) * | 2018-03-14 | 2018-08-21 | 中国计量大学 | A kind of step needle point-active substrate structure for enhancing Raman signal |
| CN109738667A (en) * | 2019-01-25 | 2019-05-10 | 东北大学 | A kind of acceleration detecting and method based on micro-optical fiber composite structure |
| CN110108693A (en) * | 2019-04-26 | 2019-08-09 | 安徽建筑大学 | Preparation method of colloid-sealed Ag nano-particle spherical efficient uniform SERS substrate |
| CN110568224A (en) * | 2018-06-05 | 2019-12-13 | 中国科学院长春应用化学研究所 | Composite near-field optical probe capable of simultaneously realizing high optical signal flux and high resolution and preparation method thereof |
| CN112432939A (en) * | 2020-11-26 | 2021-03-02 | 上海化工院检测有限公司 | Optical fiber Raman probe device with drilling function and using method |
| CN113064329A (en) * | 2021-03-25 | 2021-07-02 | 上海大学 | Pen photoetching system based on optical fiber end superlens and preparation method |
| CN114965422A (en) * | 2022-05-05 | 2022-08-30 | 北京工业大学 | Preparation method of cascade microsphere lens enhanced Raman probe |
| CN115046981A (en) * | 2022-05-27 | 2022-09-13 | 燕山大学 | Tongue-shaped optical fiber probe based on surface enhanced Raman scattering and preparation method thereof |
| CN115718205A (en) * | 2022-11-24 | 2023-02-28 | 南开大学 | Method for realizing molecular junction conductivity measurement by using coated tapered optical fiber |
| WO2023080846A3 (en) * | 2021-11-05 | 2023-08-03 | National University Of Singapore | A probe for measuring spectra, and a system and method thereof |
| US20230341330A1 (en) * | 2020-01-29 | 2023-10-26 | King's College London | Raman Spectroscopy Method and System |
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| CN104614360A (en) * | 2015-01-16 | 2015-05-13 | 中国科学院合肥物质科学研究院 | Method for assembling precious metal nanocrystalline on surface of conical fiber |
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| WO2003012504A2 (en) * | 2001-07-27 | 2003-02-13 | Universite De Technologie De Troyes | Improvements to optical fibres provided with a lens by photopolymerization and related novel optical components |
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|---|---|---|---|---|
| CN107024734B (en) * | 2017-05-10 | 2020-01-07 | 北京航空航天大学 | Sub-wavelength point light source based on micro-nano fiber cone and preparation method thereof |
| CN107024734A (en) * | 2017-05-10 | 2017-08-08 | 北京航空航天大学 | A kind of sub-wavelength spot light bored based on micro-nano fiber and preparation method thereof |
| CN108152267A (en) * | 2018-01-31 | 2018-06-12 | 西北工业大学 | A kind of method of efficient excitation metallized optical fibre Surface enhanced Raman scattering |
| CN108426869A (en) * | 2018-03-14 | 2018-08-21 | 中国计量大学 | A kind of step needle point-active substrate structure for enhancing Raman signal |
| CN108426869B (en) * | 2018-03-14 | 2021-04-09 | 中国计量大学 | Stepped needle tip-active substrate structure for enhancing Raman signal |
| CN110568224A (en) * | 2018-06-05 | 2019-12-13 | 中国科学院长春应用化学研究所 | Composite near-field optical probe capable of simultaneously realizing high optical signal flux and high resolution and preparation method thereof |
| CN109738667A (en) * | 2019-01-25 | 2019-05-10 | 东北大学 | A kind of acceleration detecting and method based on micro-optical fiber composite structure |
| CN109738667B (en) * | 2019-01-25 | 2021-05-28 | 东北大学 | Acceleration detection device and method based on micro-optical fiber composite structure |
| CN110108693A (en) * | 2019-04-26 | 2019-08-09 | 安徽建筑大学 | Preparation method of colloid-sealed Ag nano-particle spherical efficient uniform SERS substrate |
| CN110108693B (en) * | 2019-04-26 | 2021-07-13 | 安徽建筑大学 | Preparation method of colloid-sealed Ag nano-particle spherical efficient uniform SERS substrate |
| US20230341330A1 (en) * | 2020-01-29 | 2023-10-26 | King's College London | Raman Spectroscopy Method and System |
| CN112432939A (en) * | 2020-11-26 | 2021-03-02 | 上海化工院检测有限公司 | Optical fiber Raman probe device with drilling function and using method |
| CN113064329A (en) * | 2021-03-25 | 2021-07-02 | 上海大学 | Pen photoetching system based on optical fiber end superlens and preparation method |
| CN113064329B (en) * | 2021-03-25 | 2022-04-26 | 上海大学 | Pen photoetching system based on optical fiber end superlens and preparation method |
| WO2023080846A3 (en) * | 2021-11-05 | 2023-08-03 | National University Of Singapore | A probe for measuring spectra, and a system and method thereof |
| CN114965422A (en) * | 2022-05-05 | 2022-08-30 | 北京工业大学 | Preparation method of cascade microsphere lens enhanced Raman probe |
| CN114965422B (en) * | 2022-05-05 | 2024-05-28 | 北京工业大学 | Preparation method of cascade microsphere lens enhanced Raman probe |
| CN115046981A (en) * | 2022-05-27 | 2022-09-13 | 燕山大学 | Tongue-shaped optical fiber probe based on surface enhanced Raman scattering and preparation method thereof |
| WO2023226474A1 (en) * | 2022-05-27 | 2023-11-30 | 燕山大学 | Tongue-shaped optical fiber probe based on surface enhanced raman scattering, and preparation method therefor |
| CN115718205A (en) * | 2022-11-24 | 2023-02-28 | 南开大学 | Method for realizing molecular junction conductivity measurement by using coated tapered optical fiber |
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Application publication date: 20161116 |