CN106556590A - A kind of Raman spectrum detection system of based single crystal sapphire fiber and sapphire fiber probe manufacture method - Google Patents
A kind of Raman spectrum detection system of based single crystal sapphire fiber and sapphire fiber probe manufacture method Download PDFInfo
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- CN106556590A CN106556590A CN201710032626.4A CN201710032626A CN106556590A CN 106556590 A CN106556590 A CN 106556590A CN 201710032626 A CN201710032626 A CN 201710032626A CN 106556590 A CN106556590 A CN 106556590A
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- 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
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Abstract
The invention discloses a kind of Raman spectrum detection system of based single crystal sapphire fiber and sapphire fiber probe manufacture method, including laser emitting module, the semi-transparent semi-reflecting first long pass filter, the second coupler, sapphire fiber probe, and spectrometer detection and analysis module；The laser emitting module is used for the exciting light for launching single wavelength, and the exciting light of the single wavelength is imported into sapphire fiber probe, module analysis are tested and analyzed by spectrometer Jing after sapphire fiber is popped one's head in and collects the Raman scattering signal light of detected sample and detects Raman spectrum；The sapphire fiber probe manufacture method is that monocrystalline sapphire optical fiber is immersed citric acid three sodium solution and AgNO under laser action3Growth in the mixed solution of solution obtains one layer of silver nano-grain film with Raman surface enhancement effect.This invention simplifies the fibre bundle filtering schemes taken as the high background noise of Raman probe material for suppression silica fibre, it is ensured that the signal to noise ratio of Raman spectrum detection.
Description
Technical field
The present invention relates to a kind of Raman spectrum detection system of probe type, more particularly to a kind of based single crystal sapphire fiber
Raman spectrum detection system and sapphire fiber probe manufacture method.
Background technology
Raman spectrum is that a kind of molecular spectrum based on Raman scattering principle refers to trace authentication method, when light and molecule phase interaction
With and when scattering, the Raman scattering that a few photons occur in inelastic scattering is simultaneously transferred to molecule portion of energy, makes scattered light
Frequency is subjected to displacement, and displacement carries molecular information.As molecular structure is different, then displacement is different, corresponding Raman collection of illustrative plates
Also it is different, can be with the presence of chemical substance in detection sample and relative amount according to resulting Raman collection of illustrative plates.Raman light
Spectral technology is the molecular structure characterization technology set up based on Raman spectrum, and which is used as a kind of quick, lossless, safe
Detection technique, with quick correct, favorable reproducibility, simple sample pretreatment, compact portable, it is widely applicable the features such as, by
It is widely used in material analysis, drug ingredient to characterize and analysis, cell detection, food and drink detection, environmental science analysis, the administration of justice
The fields such as identification, art work identification.
Because there is stronger Raman spectrum ambient noise in silica fibre, using big core diameter silica fibre as Raman light
Probe (Jason T.Motz, Martin Hunter etc., the Optical fiber probe for of spectrum detecting system
43 (3) 542-554 of biomedical Raman spectroscopy.2004, Applied Optics) design in, can not keep away
Exempt from need by excitation fiber with collect optical fiber separate, and using various optical filters to Raman spectrum ambient noise filter, to low
The Raman signal of wave number cannot be detected, and increased the complexity of the difficulty and probe designs of light path alignment.
It is verified in being reported as the probe type Raman spectrum detection for exciting and collecting optical fiber using single optical fiber：It is empty
Core waveguide can effectively suppress Raman background noise in real core silica fibre, but too high loss causes sample Raman to believe
Number collecting efficiency is extremely low, is not suitable for practical application (Yuichi Komachi, Hidetoshi SatoRaman etc., Raman
probe using a single hollow waveguide.2005,Optics Letters 30(21)2942-2944).And
Sapphire fiber has extremely narrow Raman spectral peaks due to the structure of its monocrystal, and sapphire fiber is applied to monocrystalline sapphire
Raman fiber optic probe will substantially reduce it is existing popped one's head in based on silica fibre it is multiple to offset background spectrum noise and caused system
Miscellaneous degree.
Patent CN105784002A discloses a kind of temperature, pressure measurement apparatus detected based on Raman spectrum and test side
Method, can realize large-scale temperature survey and measurement result reliability is high.The measurement apparatus are using sapphire fiber as list
Brilliant sapphire Raman fiber optic probe, and Raman active thin-film material SiC-Au-SiC is plated in fibre-optical probe end face, by detection
In Raman active material, thermally sensitive anti-Stokes spectrum varies with temperature the temperature survey realized to hot environment.Should
Invention only detects a Raman spectrum of active material SiC-Au-SiC, from the present invention for analyzing different sample Raman spectrums examining
Survey testing sample components uses, apparatus structure different.The invention detects Raman anti-Stokes spectrum, present invention detection Raman this
Lentor spectrum, the principle of device are also differed.
The content of the invention
Problem to be solved by this invention is：A kind of Raman spectrum detecting device popped one's head in based on sapphire fiber is provided,
During probe can be realized, simple optical fiber is while as excitation fiber and collection optical fiber, solve amorphous silica fibre in 300cm-1Arrive
800cm-1The Raman spectrum ambient noise of lower wave number scope be to recognize, separate that the interference that the raman spectral signal of sample brings is asked
Topic, it is possible to provide high-quality raman spectral signal, significantly reduce the system complexity of device and improve fibre-optical probe reliability and
Stability.
The present invention also proposes that a kind of argent nanoparticle deposition sapphire fiber surface acquisition Ramam effect that passes through strengthens
Method, prepare silver nanometer particle film method be photic nanoparticle deposition facture.
In order to solve upper technical problem the technical solution used in the present invention it is：
A kind of Raman spectrum detection system of based single crystal sapphire fiber, including it is laser emitting module, semi-transparent semi-reflecting
First long pass filter, the second coupler, sapphire fiber probe, and spectrometer detection and analysis module；
The laser emitting module is used to launching the exciting light of single wavelength, and by the exciting light of the transmitting single wavelength
It is coupled into the first long pass filter；
The first long pass filter is for above-mentioned single wavelength exciting light is reflected, and is coupled into by the second coupler
Sapphire fiber is popped one's head in；
The sapphire fiber probe includes monocrystalline sapphire optical fiber and is coated with the monocrystalline sapphire optical fiber connector
Silver nano-grain film, sapphire fiber to pop one's head in and reflect back the exciting light of single wavelength for receiving the first long pass filter,
Wherein, the exciting light of the single wavelength incides monocrystalline sapphire optical fiber connector and excites through silver nano-grain film to be detected
Sample produces Raman scattering signal light；
Spectrometer detection and analysis module located at the backward of the first long pass filter, spectrometer detection and analysis module and the
The second long pass filter is provided between one long pass filter, the cutoff wavelength of the second long pass filter is sent out by laser emitting module
The wavelength of the exciting light penetrated, spectrometer detection and analysis module is used to receiving Raman scattering signal light to be carried out process and obtains Raman
Spectrum；
The Raman scattering signal light that the detected sample is produced passes through the silver nano-grain film again, and blue by monocrystalline
Jewel optical fiber returns to the second coupler, through the logical filter of the second length after the second coupler is derived through the first long pass filter
Mating plate is filtered, and filters off the exciting light of the single wavelength launched described in laser emitting module, is then introduced into spectrometer detection and analysis mould
Block detects the spectral signal of the Raman scattering signal light.
Preferably, laser emitting module includes laser instrument, for transmitting the first optical patchcord of exciting light, the first coupling
Device, and the narrow band pass filter that centre wavelength is above-mentioned single wavelength；Distinguish connecting laser in the first optical patchcord two ends
With the first coupler, laser instrument transmitting exciting light by the first optical patchcord transmission, be then coupled into by the first coupler
Narrow band pass filter, obtains the exciting light of single-frequency after filtration.
Preferably, the spectrometer detection and analysis module includes high sensitivity spectrometer, the second optical patchcord and the 3rd
Coupler, the second optical patchcord two ends are connected with high sensitivity spectrometer and the 3rd coupler respectively, described logical through the second length
Raman scattering signal light after optical filter is filtered is coupled into the second optical patchcord by the 3rd coupler, is then transferred to highly sensitive
Degree spectrometer detection.
A kind of sapphire fiber probe manufacture method for above-mentioned Raman spectrum detection system proposed by the present invention, it is described
Sapphire fiber probe test side is that argent nanoparticle deposition monocrystalline sapphire fiber end face is formed with Raman light stave
Face strengthens the silver nano-grain film of benefit, and the probe manufacture method is mainly included the following steps that：
The preparation of step one, the solution of nanoparticle deposition containing argent, prepares the Yin Na deposited by silver nanometer particle film
Rice grain comes from AgNO3Solution, before deposition by citric acid three sodium solution and AgNO3Solution mixing system is into growth solution, juxtaposition
It is standby in dark room conditions；
Step 2, monocrystalline sapphire optical fiber surface cleaning, monocrystalline sapphire optical fiber one end used is soaked in concentrated sulfuric acid solution
Stain, then cleans in acetone, ethanol, deionized water, standby after monocrystalline sapphire fiber end face impurity to remove；
Step 3, deposition, monocrystalline sapphire optical fiber one end is immersed in above-mentioned growth solution, then by above-mentioned sapphire light
The laser of the fine employing single wavelength of popping one's head in imports monocrystalline sapphire optical fiber, in the growth solution prepared under laser action
Silver nano-grain starts in monocrystalline sapphire fiber end face apposition growth, forms silver nano-grain film；
Step 4, cleaning-drying, the monocrystalline sapphire optical fiber that surface modification is crossed clean many to remove in deionized water
Remaining silver ion, and be dried with nitrogen, you can obtain sapphire fiber probe.
Preferably, citric acid three sodium solution and AgNO in the step one3The concentration range of solution be 0.1-10 ×
10-3M/L, citric acid three sodium solution and AgNO3The ratio 0.4 of solution molar concentration:1-2:1.
Preferably, in the step 3, the time that monocrystalline sapphire optical fiber is grown in growth solution is 20-40 point
Clock.
The invention has the beneficial effects as follows：
The advantage of the present invention is, as Raman spectrum detection probe, to increase effectively and excite using single real core fibre material
The coupling efficiency of light and collection light；Avoid the complicated filter by suppressing to take based on the ambient noise of quartzy reality core fibre probe
Wave structure；The present invention combines metal nanoparticle surface Enhancement Method, the spectral detection sensitivity for greatly improving；Sapphire light
Fine probe heat endurance is good, chemical inertness is good, can apply in high temperature, high pressure, highly corrosive and inflammable and explosive environment；Separately
The outer present invention optimizes system source selection for biochemical samples, can be on the premise of excitation photon energy is ensured effectively
Avoid fluorescence excitation spectrum.
Description of the drawings
Fig. 1 is the Raman spectrum detection system principle schematic that the present invention is popped one's head in based on sapphire fiber.
Fig. 2 is the Raman spectrogram of sapphire fiber probe of the present invention.
Fig. 3 is the Raman spectrogram popped one's head in based on quartzy multimode fibre.
Fig. 4 is the Raman spectrogram of the silicon chip of silica fibre and sapphire fiber probe detection.
1- laser instruments, the first optical patchcords of 2-, the first couplers of 3-, 4- narrow band pass filters, the length of 5- first is logical to filter
Piece, the second couplers of 6-, 7- sapphire fibers probe, the second long pass filters of 8-, the 3rd couplers of 9-, the second optical fiber of 10- are jumped
Line, 11- high sensitivity spectrometers.
Specific embodiment
Describe the preferred embodiments of the present invention below in conjunction with the accompanying drawings in detail.
The device composition of the present invention includes LASER Light Source, coupler, optical filter, beam splitter, sapphire fiber probe and height
Sensitivity spectrum instrument.
Laser instrument of the LASER Light Source for narrow linewidth in the present invention, wavelength can select 532nm, 785nm, 1064nm etc., by
It is directly proportional to the quadruplicate inverse of laser emitting module wavelength in Raman scattering intensities, is to obtain stronger Raman spectrum letter
Number, it is the laser instrument of 532nm as light source that the Raman detection based on fibre-optical probe can adopt wavelength, but stronger photon energy
Amount causes the strong fluorescence phenomenon of some samples simultaneously, such as most biological samples, so the present embodiment selects wavelength for 785nm's
Exciting Raman scattering, the wavelength exciting light compares 1064nm light sources higher photon energy to light source, but can't picture
532nm laser has extremely strong fluorescence excitation effect in biological sample.
Strengthen adopting for Raman spectrum system by the way of fiber coupling is combined with free space optical coupling in the present invention
Collection efficiency, wherein exciting light conduction, sapphire fiber probe are connected with high sensitivity spectrometer and are connected using optical fiber, only narrow
The free-space light propagation mode of high-transmission rate is adopted in terms of with bandpass filter, long pass filter filtration, in optical fiber and freedom
Using the accurate collimating element based on optical fiber original paper for encapsulating in terms of space optical coupling.
In the present embodiment, sapphire fiber used is popped one's head in as high-purity monocrystalline sapphire fiber core and air cladding layer, leaded light
From visible ray to 3000nm, 125 μm of fibre diameter is grown window using LHPG (Laser heated pedestal growth)
Method, fusing point be higher than 2000 degrees Celsius, can steady operation in 1200～1300 degrees Celsius of environment, with high laser damage threshold, and
Resistance to chemical attack.
Refer to Fig. 1, a kind of Raman spectrum detection system of based single crystal sapphire fiber, including laser emitting module,
Semi-transparent semi-reflecting the first long pass filter 5, the second coupler 6, sapphire fiber probe 7, and spectrometer detection and analysis module；
Laser emitting module includes laser instrument 1, for transmitting the first optical patchcord 2 of exciting light, for optical fiber and space
The first coupler of optical coupling 3, and the narrow band pass filter 4 that centre wavelength is 785nm；Wavelength is chosen in the present embodiment is
LASER Light Source of the laser instrument 1 of 785nm as spectral detection, 2 two ends of the first optical patchcord difference connecting laser 1 and the first coupling
Clutch 3, the exciting light of the transmitting of laser instrument 1 are transmitted by the first optical patchcord 2, are then coupled into arrowband by the first coupler 3
Bandpass filter 4, obtains the exciting light of single-frequency after filtration.First optical patchcord 2 is multimode large core fiber wire jumper；
First coupler 3 is optical fiber collimator；
For the first long pass filter 5 of the semi-transparent semi-reflecting 785nm of light splitting, its major function is reflected excitation light and will draw
Long wavelength's stokes light of graceful scattering is filtered, for optical fiber and the second coupler 6 of space optical coupling, and as light
The sapphire fiber probe 7 of spectrum detection probe.Spectrometer detection and analysis module includes：Cutoff wavelength is logical for second length of 785nm
Optical filter 8, for filtering the exciting light of 785nm, for optical fiber and the 3rd coupler 9 of space optical coupling, passes for scattered light
The second optical patchcord 10 led, and spectrum analysis high sensitivity spectrometer 11.
First coupler 3, the second coupler 6 and the 3rd coupler 9 are optical fiber collimator in the present embodiment,
Optional other optical couplers.Second optical patchcord 10 is also multimode large core fiber wire jumper.
Narrow linewidth laser of the laser emitting module employed in the present invention for 785nm, the exciting light of the wavelength ensure
While higher photon energy, the fluorescence excitation effect of biological sample can be suppressed.The exciting light passes through sapphire fiber
Probe 7 and detected sample interaction, the 785nm exciting lights of reflection, collected detected sample and sapphire fiber
Pop one's head in 7 backgrounds Stokes Raman back-scattering light commonly through the first long pass filter 5, the exciting light of 785nm is filtered,
Wavelength passes through the 3rd after the second long pass filter 8 of high-isolation more than the Stokes Raman back-scattering light of 785nm
Coupler 9 focuses on incident second optical patchcord 10.The signal detected by high sensitivity spectrometer 11 is that sapphire fiber is popped one's head in 7
Bottom and the superimposed Raman signal of detected sample, by record sapphire fiber pop one's head in 7 Backgrounds and with sample signal phase
Subtract, it is possible to obtain the Raman spectrum of flashlight.
By strengthening the raman spectrum strength for exciting, the sapphire fiber pops one's head in 7 test sides for metal silver nano-grain
Depositing monocrystalline sapphire fiber end face forms the silver nano-grain film with Raman spectrum surface enhanced benefit, probe manufacturer
Method is mainly included the following steps that：
The preparation of step one, the solution of nanoparticle deposition containing argent, prepares the Yin Na deposited by silver nanometer particle film
Rice grain comes from AgNO3Solution, before deposition by citric acid three sodium solution and AgNO3Solution mixing system is into growth solution, juxtaposition
It is standby in dark room conditions；
Step 2, monocrystalline sapphire optical fiber surface cleaning, monocrystalline sapphire optical fiber one end used is soaked in concentrated sulfuric acid solution
Stain, then cleans in acetone, ethanol, deionized water, standby after monocrystalline sapphire fiber end face impurity to remove；
Step 3, deposition, monocrystalline sapphire optical fiber one end is immersed in above-mentioned growth solution, then by above-mentioned 785nm
Laser imports monocrystalline sapphire optical fiber, and the silver nano-grain in the growth solution prepared under laser action starts blue precious in monocrystalline
Stone fiber end face apposition growth, forms silver nano-grain film；
Step 4, cleaning-drying, the monocrystalline sapphire optical fiber that surface modification is crossed clean many to remove in deionized water
Remaining silver ion, and be dried with nitrogen, you can obtain sapphire fiber probe 7.
Wherein, citric acid three sodium solution and AgNO in described step one3The optimum concentration range of solution is 0.1-10
×10-3M/L, 1 × 10-3M/L is optium concentration；Citric acid three sodium solution and AgNO3The ratio 0.4 of solution molar concentration:1-2:1,
Optimal citric acid three sodium solution and AgNO3The ratio of solution molar concentration is 1:1.It should be pointed out that afore mentioned concentration limits and
Concentration ratio is not to be only limited to listed numerical value, by growth time in the intensity and growth solution of laser in change step 3
The silver nano-grain film with Raman spectrum surface enhanced benefit can be obtained in monocrystalline sapphire fiber end face.
In the step 3, the time that monocrystalline sapphire optical fiber is grown in growth solution be generally 20-40 minutes, this when
Between can be adjusted according to growth solution concentration and proportioning and laser intensity.
The SiC-Au-SiC that the silver nano-grain deposition adopted by the present embodiment is different from patent CN105784002A is active
Material surface is deposited.The Silver Nanoparticles that the present embodiment is adopted can inspire free electron vibration in the case where incident light is excited,
And surface plasmon resonance, Raman signal can amplify several orders of magnitude by the effect.In patent CN105784002A
SiC-Au-SiC active materials deposition purpose is that SiC being capable of high temperature resistant, it is adaptable to the invention use environment, and should by collecting
The spectrum of material realizes temperature demodulation.
Sapphire fiber that high sensitivity spectrometer 11 is collected pop one's head in 7 Background Raman spectrums as shown in Fig. 2 by
In probe used for monocrystal, high-purity sapphire material, spectrum is only presented sapphire material in 417cm-1、568cm-1、
721cm-1Three narrower discrete characteristic peaks in wave number, spectrum have relatively low background noise in other wave numbers.It is identical enter
Under the premise of penetrating excitation light power, using quartzy multimode fibre (62.5/125) as probe scheme in, the background of fibre-optical probe
Background is as shown in figure 3, as silica fibre material is AMAT structure, be less than 1000cm in wave number-1Lower wave number scope
Higher and continuous background noise is presented inside.
Fig. 4 disclose monocrystalline sapphire optical fiber and quartzy multimode fibre as during Raman spectrum detection probe to silicon chip sample
The spectral detection of product.Equal-wattage exciting light is incident and under conditions of identical time of integration, sapphire fiber shows
520cm-1Silicon raman characteristic peak, and silica fibre due in the range of the lower wave number higher ambient noise have it is relatively low
Raman signal to noise ratio, it is impossible to detect the Raman signal in the wave-number range.
It is pointed out that above-described embodiment uses the laser instrument 1 of 785nm, the light source that wavelength is 785nm is selected
The reason for exciting Raman scattering is that in 660nm-830nm wave-length coverages, exciting light compares 1064nm light sources higher photon energy
Amount, but can't have extremely strong fluorescence excitation effect in biological sample as 532nm laser.But the present invention is not limited only to adopt
Laser instrument 1 of the wavelength for 785nm, and other from ultraviolet light near infrared light (typical wavelength range is 200nm-1100nm)
Laser instrument 1 can be applicable to the present invention, realize the purpose of the present invention.
The sapphire fiber probe 7 that the present invention is implemented can be applicable to the semiquantitative inspections such as material tests, sample composition analysis
Survey, during use only need to by made by the sapphire fiber in the present invention sapphire fiber probe 7 immerse testing sample liquid in or
Solid sample surface to be detected is placed in, module collection sample raman spectral signal is tested and analyzed by spectrometer to be detected to analyze
The composition of sample, for high temperature, high pressure, highly corrosive and inflammable and explosive detection environment, present invention achieves exceedingly odious ring
Long-range, real-time online sample composition analysis in border, with larger using value.
In sum, the Raman spectrum detection system and sapphire fiber of based single crystal sapphire fiber proposed by the present invention
Sensor sensitivity Enhancement Method realizes simple optical fiber probe real-time detection sample raman spectral signal, especially in lower wave number model
The detection of interior raman characteristic peak is enclosed, is simplified to suppress what silica fibre was taken as the high background noise of Raman probe material
Fibre bundle filtering schemes, it is ensured that the signal to noise ratio of Raman spectrum detection.
Claims (7)
1. a kind of Raman spectrum detection system of based single crystal sapphire fiber, it is characterised in that：Including laser emitting module, partly
Saturating half the first anti-long pass filter, the second coupler, sapphire fiber probe, and spectrometer detection and analysis module；
The laser emitting module is used to launching the exciting light of single wavelength, and the transmitting single wavelength is excited optical coupling
Enter the first long pass filter；
The first long pass filter is for above-mentioned single wavelength exciting light is reflected, and is coupled into blue treasured by the second coupler
Stone fibre-optical probe；
The silver that the sapphire fiber probe includes monocrystalline sapphire optical fiber and is coated with the monocrystalline sapphire optical fiber connector
Nano-particular film, sapphire fiber are popped one's head in and the exciting light of single wavelength are reflected back for receiving the first long pass filter, wherein,
The exciting light of the single wavelength incides monocrystalline sapphire optical fiber connector and excites detected sample through silver nano-grain film
Produce Raman scattering signal light；
The spectrometer detection and analysis module is located at the backward of the first long pass filter, spectrometer detection and analysis module and the first length
It is provided with the second long pass filter between pass filter, what the cutoff wavelength of the second long pass filter was launched by laser emitting module
The wavelength of exciting light, spectrometer detection and analysis module is used to receiving Raman scattering signal light to be carried out process and obtains Raman light
Spectrum；
The Raman scattering signal light that the detected sample is produced passes through the silver nano-grain film again, and passes through monocrystalline sapphire
Optical fiber returns to the second coupler, through the second long pass filter after the second coupler is derived through the first long pass filter
Filter, filter off the exciting light of the single wavelength of the laser emitting module transmitting, be then introduced into spectrometer detection and analysis module inspection
Survey the spectral signal of the Raman scattering signal light.
2. as claimed in claim 1 a kind of Raman spectrum detection system, it is characterised in that：Laser emitting module includes laser instrument,
For transmitting the first optical patchcord of exciting light, the first coupler, and the narrow-band bandpass that centre wavelength is above-mentioned single wavelength
Optical filter；Connecting laser and the first coupler are distinguished in first optical patchcord two ends, and the exciting light of laser instrument transmitting passes through first
Optical patchcord is transmitted, and is then coupled into narrow band pass filter by the first coupler, exciting for single-frequency is obtained after filtration
Light.
3. as claimed in claim 1 a kind of Raman spectrum detection system, it is characterised in that：The spectrometer tests and analyzes module bag
Include high sensitivity spectrometer, the second optical patchcord and the 3rd coupler, the second optical patchcord two ends respectively with high sensitivity spectrum
Instrument and the 3rd coupler are connected, and the Raman scattering signal light after the second long pass filter is filtered passes through the 3rd coupler
The second optical patchcord is coupled into, the detection of high sensitivity spectrometer is then transferred to.
4. a kind of sapphire fiber for Raman spectrum detection system described in claim 1 is popped one's head in, it is characterised in that：Including
Monocrystalline sapphire optical fiber, the monocrystalline sapphire optical fiber connector are coated with silver nano-grain film.
5. a kind of sapphire fiber probe manufacture method for Raman spectrum detection system described in claim 1, its feature exist
In：The sapphire fiber probe test side is that argent nanoparticle deposition monocrystalline sapphire fiber end face is formed with Raman
Optical spectrum surface strengthens the silver nano-grain film of benefit, and the probe manufacture method is mainly included the following steps that：
The preparation of step one, the solution of nanoparticle deposition containing argent, prepares the silver nanoparticle deposited by silver nanometer particle film
Grain comes from AgNO3Solution, before deposition by citric acid three sodium solution and AgNO3Solution mixing system is placed in dark into growth solution
It is standby in room environmental；
Step 2, monocrystalline sapphire optical fiber surface cleaning, monocrystalline sapphire optical fiber one end used are impregnated in concentrated sulfuric acid solution, so
Clean in acetone, ethanol, deionized water afterwards, it is standby after monocrystalline sapphire fiber end face impurity to remove；
Step 3, deposition, one end that monocrystalline sapphire fiber end face was cleaned are immersed in above-mentioned growth solution, then will be above-mentioned
Sapphire fiber probe imports monocrystalline sapphire optical fiber, the life prepared under laser action using the exciting light of the single wavelength
Silver nano-grain in long solution starts in monocrystalline sapphire fiber end face apposition growth, forms silver nano-grain film；
Step 4, cleaning-drying, the monocrystalline sapphire optical fiber that surface modification is crossed clean unnecessary to remove in deionized water
Silver ion, and be dried with nitrogen, you can obtain sapphire fiber probe.
6. as claimed in claim 5 a kind of sapphire fiber is popped one's head in manufacture method, it is characterised in that：Citric acid in the step one
Three sodium solutions and AgNO3The concentration range of solution is 0.1-10 × 10-3M/L, citric acid three sodium solution and AgNO3Solution mole
The ratio 0.4 of concentration:1-2:1.
7. as claimed in claim 6 a kind of sapphire fiber is popped one's head in manufacture method, it is characterised in that：In the step 3, monocrystalline
The time that sapphire fiber is grown in growth solution is 20-40 minutes.
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| CN107024466A (en) * | 2017-04-20 | 2017-08-08 | 金华职业技术学院 | A kind of optic probe with self-reference optical fiber |
| CN107841732A (en) * | 2017-11-23 | 2018-03-27 | 武汉理工大学 | A kind of silver-plated fiber Raman probe and preparation method thereof |
| CN108169206A (en) * | 2017-12-27 | 2018-06-15 | 合肥知常光电科技有限公司 | A kind of micro detecting device and detection method |
| CN112730374A (en) * | 2020-12-03 | 2021-04-30 | 北京信息科技大学 | Optical fiber Raman probe for detecting low-concentration components in-vivo blood |
| CN114755213A (en) * | 2021-12-28 | 2022-07-15 | 大连世佩达光谱智能检测科技有限公司 | Monochromatic transmission light intensity calibration nondestructive testing method and equipment for sensitivity of SERS Raman chip |
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| CN107024466A (en) * | 2017-04-20 | 2017-08-08 | 金华职业技术学院 | A kind of optic probe with self-reference optical fiber |
| CN107841732A (en) * | 2017-11-23 | 2018-03-27 | 武汉理工大学 | A kind of silver-plated fiber Raman probe and preparation method thereof |
| CN107841732B (en) * | 2017-11-23 | 2022-06-03 | 武汉理工大学 | Silver-plated optical fiber Raman probe and preparation method thereof |
| CN108169206A (en) * | 2017-12-27 | 2018-06-15 | 合肥知常光电科技有限公司 | A kind of micro detecting device and detection method |
| CN112730374A (en) * | 2020-12-03 | 2021-04-30 | 北京信息科技大学 | Optical fiber Raman probe for detecting low-concentration components in-vivo blood |
| CN114755213A (en) * | 2021-12-28 | 2022-07-15 | 大连世佩达光谱智能检测科技有限公司 | Monochromatic transmission light intensity calibration nondestructive testing method and equipment for sensitivity of SERS Raman chip |
| CN114755213B (en) * | 2021-12-28 | 2024-06-04 | 大连世佩达光谱智能检测科技有限公司 | Monochromatic transmission light intensity calibration nondestructive testing method and equipment for SERS Raman chip sensitivity |
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