CN107024466A - A kind of optic probe with self-reference optical fiber - Google Patents
A kind of optic probe with self-reference optical fiber Download PDFInfo
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- CN107024466A CN107024466A CN201710309985.XA CN201710309985A CN107024466A CN 107024466 A CN107024466 A CN 107024466A CN 201710309985 A CN201710309985 A CN 201710309985A CN 107024466 A CN107024466 A CN 107024466A
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- lens
- fiber
- sapphire fiber
- raman
- sapphire
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- 239000000523 sample Substances 0.000 title claims abstract description 69
- 239000013307 optical fiber Substances 0.000 title claims abstract description 34
- 229910052594 sapphire Inorganic materials 0.000 claims abstract description 67
- 239000010980 sapphire Substances 0.000 claims abstract description 67
- 239000000835 fiber Substances 0.000 claims abstract description 58
- 238000001069 Raman spectroscopy Methods 0.000 claims abstract description 43
- 230000003287 optical effect Effects 0.000 claims abstract description 35
- 230000005284 excitation Effects 0.000 claims abstract description 19
- 230000000694 effects Effects 0.000 claims abstract description 10
- 230000005540 biological transmission Effects 0.000 claims abstract description 8
- 238000004093 laser heating Methods 0.000 claims abstract description 5
- 238000002474 experimental method Methods 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 210000005239 tubule Anatomy 0.000 claims description 3
- 230000013011 mating Effects 0.000 claims description 2
- 238000009738 saturating Methods 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 3
- 230000011664 signaling Effects 0.000 abstract 1
- -1 spectrometer Substances 0.000 abstract 1
- 238000001237 Raman spectrum Methods 0.000 description 8
- 230000008859 change Effects 0.000 description 6
- 239000010432 diamond Substances 0.000 description 5
- 229910003460 diamond Inorganic materials 0.000 description 5
- 230000005670 electromagnetic radiation Effects 0.000 description 5
- 238000007430 reference method Methods 0.000 description 3
- 241001062009 Indigofera Species 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000012472 biological sample Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000010437 gem Substances 0.000 description 1
- 229910001751 gemstone Inorganic materials 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000004611 spectroscopical analysis Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- 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
-
- 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
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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- Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
The present invention relates to optical signalling detection field, a kind of optic probe with self-reference optical fiber, including power supply, laser diode, lens I, input optical fibre, sonde body, input lens, optical filter, dichroic filters, lens II, sapphire fiber, Raman optical filter, lens III, output optical fibre, spectrometer, sapphire fiber upper end can connect or separate with sonde body, sapphire fiber lower end can be close to sample surfaces, probe sapphire fiber lower end when working in contact mode can be contacted with sample, play sapphire fiber capacity of heat transmission, reduce the Laser heating effect of sample；The Raman light emitted when excitation laser irradiates from sample and sapphire fiber and excitation laser backpropagation, and collimated by lens II, excitation laser by Raman optical filter to filter reflection or scatter, and focused on by lens III in output optical fibre, into the spectrometer, so that the Raman light sent by sapphire fiber into spectrometer is enhanced, the light collection time is shortened.
Description
Technical field
The present invention relates to technical field of optical signal detection, particularly a kind of sapphire fiber can be very close to sample table
Face, a kind of optic probe with self-reference optical fiber for the light collection time that can shorten in experiment.
Background technology
In all spectroscopy technologies, the quantitative measurment to the intensity of the light detected needs one with reference to intensity,
Because the intensity of the signal detected depends on power, the sample that a series of factor such as incides the excitation laser beam on sample
The geometric configuration of illumination, the coupling of the transmitting from sample to spectrometer, detection efficient of spectrometer etc., but these are generally all not easy really
It is fixed.Current topmost difficulty is optical fiber optical measuring system, because signal often changes, even due to optical fiber
Caused by input and output side movement.
When illumination is mapped in something, its scattered light is gathered using spectrometer, find in scattered light except with incident optical frequency
Outside rate identical spectral line, also sub-fraction intensity is extremely weak, frequency shift (increasing or decreasing) spectral line, and this phenomenon is referred to as drawing
Graceful effect, this experimental method is referred to as Raman spectrum.Raman spectrum reflects molecular vibration and rotation information, is the research structure of matter
And the Main Means of analysis test.Above-mentioned light especially causes pass with reference to the problem of intensity in Raman spectrum relevant device
Note.Used in order to overcome above-mentioned difficulties, in some experiments and determine an interior calibration method for sample, i.e., in the same of measurement testing sample
When measure another standard sample；This standard is included in the device instrument of measurement in some experiments, referred to as external standard, it is this
Method is self-reference method, and the advantage of self-reference method is to can apply to various samples.
Have three using the prior art of self-reference method, one is, one layer of diamond film is deposited on fibre-optical probe end, diamond
The Raman light of film is used as standard, but polycrystal film reduce the excitation laser for inciding sample energy and with from sample
The coupling of the Raman light of probe is transmitted back to, optical fiber is used to couple the exciting light from laser to sample and the drawing from sample to spectrometer
Graceful light.Two are, are embedded into a glass needle point for being located at fibre-optical probe end using a small diamond monocrystalline, still, because
Diamond grains need to deviate main optical path to avoid transition from scattering, and the ratio of the Raman signal sent from diamond and sample is still with being
Unite light path change and change.Three are, are used as self-reference using a sapphire window, that is, use sapphire Raman signal intensity
As with reference to intensity, excitation laser beam forms two focuses, and first intraoral positioned at a sapphire window, and second is located at sample
Interior, still, the Raman light come out from sapphire is weaker than the Raman light come out from sample a lot, and this is accomplished by using very long collection
Time, even if so, it is still desirable to which more data processing methods can just obtain preferable data resolution.
Another limitation in Raman spectrum is the Laser heating effect of sample, i.e. the energy of excitation laser makes sample temperature
Rise, this can cause the degraded of some biological samples, and some prior arts reduce sample heating effect using rotary sample, but
It is that will reduce the spatial resolution of experimental data；Above-mentioned 3rd is played the sapphire window position that self-reference is acted in the prior art
In in probe, with sample farther out, therefore the sapphire window detected in spectrometer send Raman light as reference signal with from
Sample sends Raman light to be measured and compared, and intensity is weak many, it is necessary to which enough acquisition times can just obtain the reference of sufficient intensity
A kind of signal, optic probe with self-reference optical fiber can solve problem.
The content of the invention
In order to solve the above problems, the present invention seeks to：Change in the prior art sapphire window be located at probe within without
It can be contacted with sample, it is impossible to play the reality of its capacity of heat transmission, so as to solve above mentioned problem.
The technical solution adopted in the present invention is：
A kind of optic probe with self-reference optical fiber mainly includes power supply, laser diode, lens I, input light
Fibre, sonde body, input lens, optical filter, dichroic filters, lens II, sapphire fiber, Raman optical filter, lens III,
Output optical fibre, spectrometer, the sonde body, input lens, optical filter, dichroic filters, lens II, sapphire fiber, Raman
Optical filter, lens III composition probes, the laser diode are connected with power supply, and the laser diode excitation laser beam passes through
The lens I, input optical fibre enter after probe, are collimated first by the input lens, then by the optical filter, then by institute
Dichroic filters are stated to be inclined to the lens II and focus on the sapphire fiber, it is the input lens, optical filter, double-colored
It is located to optical filtering, lens II, Raman optical filter, lens III in the sonde body, the sapphire fiber direction is along c-
0.5 millimeter of axle, diameter, 8 centimetres of length and its as an external standard, i.e., the sapphire fiber obtained in the spectrometer
Raman light as contrast signal, play self-reference effect.The c- axles are upright crystal axis.
Stainless steel tubule is cased with the outside of the sapphire fiber and its upper end has a joints of optical fibre so that be described
Sapphire fiber can be connected or separated with the lower section of the sonde body, and during experiment, the sapphire fiber lower end can be close
Sample surfaces and very near with sample position, particularly when the probe is working in contact mode, the sapphire fiber
Lower end can be contacted with sample, play the sapphire fiber capacity of heat transmission, reduce the Laser heating effect of sample；Exciting
The Raman light emitted when laser irradiates from sample and the sapphire fiber and excitation laser backpropagation, and by institute
Lens II collimations are stated, then by the Raman optical filter to filter the excitation laser of reflection or scattering, and by the lens III
Focus in the output optical fibre, and enter the spectrometer so that enter being sent by the sapphire fiber for the spectrometer
Raman light is enhanced, and shortens the light collection time in experiment, i.e., the sapphire light of reference signal is used as in Raman spectrum
Fine signal enhancing.
The sapphire fiber has three peaks in Raman spectrum, when at least one in these three peaks not with sample
When Raman signal is overlapping, the self-reference characteristic of probe is easiest to implement.
Due to having solid between the power for the excitation laser for entering the sapphire fiber and being come out from the sapphire fiber
Fixed relation, and the signal that goes out of electromagnetic radiation has before the spectrometer is entered with the Raman signal in the sapphire fiber
Same light path, therefore, the intensity for the signal that the intensity of the Raman signal of the sapphire fiber can go out as electromagnetic radiation
A reliable reference；In other words, the Raman light meeting by the sapphire fiber and electromagnetic radiation detected
Change at the same scale, how to change but regardless of the transmission coefficient between laser power or input optical fibre and output optical fibre.
The beneficial effects of the invention are as follows：
The present invention include a sapphire fiber, using sapphire material capacity of heat transmission it is good the characteristics of, make its visit
Position and sample in head closely, and can work under contact mode and noncontact neighbour's pattern；Sapphire fiber one
End and sample position very close to so that the Raman light that sapphire fiber is sent is enhanced, therefore the indigo plant detected in spectrometer is precious
The intensity for the Raman light as reference signal that stone window is sent is stronger.
Brief description of the drawings
Further illustrated with reference to the figure of the present invention：
Fig. 1 is schematic diagram of the present invention.
In figure, 1. power supplys, 2. laser diodes, 3. lens I, 4. input optical fibres, 5. sonde bodies, 6. input lens, 7. filters
Mating plate, 8. dichroic filters, 9. lens II, 10. sapphire fibers, 11. Raman optical filters, 12. lens III, 13. output lights
Fibre, 14. spectrometers.
Embodiment
If Fig. 1 is schematic diagram of the present invention, mainly include power supply 1, laser diode 2, lens I 3, input optical fibre 4, probe
Body 5, input lens 6, optical filter 7, dichroic filters 8, lens II 9, sapphire fiber 10, Raman optical filter 11, lens
III12, output optical fibre 13, spectrometer 14, the sonde body 5, input lens 6, optical filter 7, dichroic filters 8, lens II9,
Sapphire fiber 10, Raman optical filter 11, lens III12 composition probes, the laser diode 2 is connected with power supply 1, described to swash
The excitation laser beam of optical diode 2 is entered after probe by the lens I 3, input optical fibre 4, accurate by the input lens 6 first
Directly, then by the optical filter 7, then it is inclined to by the dichroic filters 8 to the lens II 9 and focuses on the indigo plant
Jewel optical fiber 10, the input lens 6, optical filter 7, dichroic filters 8, lens II 9, Raman optical filter 11, lens
III12 is located in the sonde body 5, the direction of sapphire fiber 10 along 0.5 millimeter of c- axles, diameter, 8 centimetres of length and
It is as an external standard, i.e., the Raman light of the sapphire fiber 10 obtained in the spectrometer 14 rises as contrast signal
To self-reference effect.The c- axles are upright crystal axis.
The outside of sapphire fiber 10 is cased with stainless steel tubule and its upper end has a joints of optical fibre so that institute
Stating sapphire fiber 10 can connect or separate with the lower section of the sonde body 5, during experiment, the lower end energy of sapphire fiber 10
It is enough close to sample surfaces and very near with sample position, it is described blue precious particularly when the probe is working in contact mode
The lower end of stone optical fiber 10 can be contacted with sample, play the capacity of heat transmission of sapphire fiber 10, the laser heating of reduction sample
Effect；When excitation laser irradiates, the Raman light and excitation laser emitted from sample and the sapphire fiber 10 is anti-
Collimated to propagation, and by the lens II 9, exciting for then reflecting or scatter to filter by the Raman optical filter 11 is sharp
Light, and focused on by the lens III12 in the output optical fibre 13, and enter the spectrometer 14 so that enter the spectrometer
14 Raman light sent by the sapphire fiber 10 is enhanced, and shortens the light collection time in experiment, i.e. Raman spectrum
The signal enhancing of the middle sapphire fiber 10 as reference signal.
The sapphire fiber 10 has three peaks in Raman spectrum, when at least one in these three peaks is no and sample
Raman signal it is overlapping when, the self-reference characteristic of probe is easiest to implement.
Due between the power for the excitation laser for entering the sapphire fiber 10 and being come out from the sapphire fiber 10
Have a fixed relation, and the signal that goes out of electromagnetic radiation before the spectrometer 14 is entered with the drawing in the sapphire fiber 10
Graceful signal has same light path, therefore, what the intensity of the Raman signal of the sapphire fiber 10 can go out as electromagnetic radiation
The reliable reference of one of the intensity of signal；In other words, that detects is sent out by the sapphire fiber 10 and sample
The Raman light penetrated can change at the same scale, but regardless of the transmission system between laser power or input optical fibre and output optical fibre
How number changes.
Claims (1)
1. a kind of optic probe with self-reference optical fiber, mainly including power supply (1), laser diode (2), lens I (3), defeated
Enter optical fiber (4), sonde body (5), input lens (6), optical filter (7), dichroic filters (8), lens II (9), sapphire light
Fine (10), Raman optical filter (11), lens III (12), output optical fibre (13), spectrometer (14), the sonde body (5), input are saturating
Mirror (6), optical filter (7), dichroic filters (8), lens II (9), sapphire fiber (10), Raman optical filter (11), lens
III (12) composition probes, the laser diode (2) is connected with power supply (1), and laser diode (2) excitation laser beam is led to
Cross the lens I (3), input optical fibre (4) to enter after probe, collimated first by the input lens (6), then pass through the filter
Mating plate (7), then be inclined to by the dichroic filters (8) to the lens II (9) and focus on the sapphire fiber (10),
The input lens (6), optical filter (7), dichroic filters (8), lens II (9), Raman optical filter (11), lens III
(12) be located in the sonde body (5), sapphire fiber (10) direction along 0.5 millimeter of c- axles, diameter, 8 centimetres of length,
And it is as an external standard, i.e., the Raman light of the sapphire fiber (10) obtained in the spectrometer (14) is as with reference to letter
Number, self-reference effect is played,
It is characterized in that：Stainless steel tubule is cased with the outside of the sapphire fiber (10) and its upper end has a joints of optical fibre,
It can connect or separate with the lower section of the sonde body (5), during experiment, sapphire fiber (10) lower end can be close
Sample surfaces, when the probe is working in contact mode, sapphire fiber (10) lower end can be contacted with sample, hair
The sapphire fiber (10) capacity of heat transmission is waved, the Laser heating effect of sample is reduced；When excitation laser irradiates, from sample
And the Raman light that emits of the sapphire fiber (10) and excitation laser backpropagation, and it is accurate by the lens II (9)
Directly, then by the Raman optical filter (11) to filter the excitation laser of reflection or scattering, and it is poly- by the lens III (12)
Jiao is arrived in the output optical fibre (13), and enters the spectrometer (14) so that into the spectrometer (14) by the sapphire
The Raman light that optical fiber (10) is sent is enhanced, and shortens the light collection time in experiment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710309985.XA CN107024466A (en) | 2017-04-20 | 2017-04-20 | A kind of optic probe with self-reference optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710309985.XA CN107024466A (en) | 2017-04-20 | 2017-04-20 | A kind of optic probe with self-reference optical fiber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107024466A true CN107024466A (en) | 2017-08-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710309985.XA Withdrawn CN107024466A (en) | 2017-04-20 | 2017-04-20 | A kind of optic probe with self-reference optical fiber |
Country Status (1)
| Country | Link |
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| CN (1) | CN107024466A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110031444A (en) * | 2019-04-22 | 2019-07-19 | 金华职业技术学院 | A kind of method for measuring Raman spectrum under cryogenic conditions |
| CN111328373A (en) * | 2017-11-07 | 2020-06-23 | 株式会社岛津制作所 | Infrared spectrophotometer accessory |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140268129A1 (en) * | 2012-05-03 | 2014-09-18 | Nicholas Djeu | Self-referencing fiber-optic raman probe |
| CN106291841A (en) * | 2016-11-01 | 2017-01-04 | 天津恒瑜晶体材料股份有限公司 | Sapphire nut non-welded-connecting type sapphire fiber output end cap |
| CN106556590A (en) * | 2017-01-16 | 2017-04-05 | 长飞光纤光缆股份有限公司 | A kind of Raman spectrum detection system of based single crystal sapphire fiber and sapphire fiber probe manufacture method |
-
2017
- 2017-04-20 CN CN201710309985.XA patent/CN107024466A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140268129A1 (en) * | 2012-05-03 | 2014-09-18 | Nicholas Djeu | Self-referencing fiber-optic raman probe |
| CN106291841A (en) * | 2016-11-01 | 2017-01-04 | 天津恒瑜晶体材料股份有限公司 | Sapphire nut non-welded-connecting type sapphire fiber output end cap |
| CN106556590A (en) * | 2017-01-16 | 2017-04-05 | 长飞光纤光缆股份有限公司 | A kind of Raman spectrum detection system of based single crystal sapphire fiber and sapphire fiber probe manufacture method |
Non-Patent Citations (1)
| Title |
|---|
| 叶林华: "传感与传能用蓝宝石单晶光纤的生长与光学特性", 红外与毫米波学报, no. 03 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111328373A (en) * | 2017-11-07 | 2020-06-23 | 株式会社岛津制作所 | Infrared spectrophotometer accessory |
| CN110031444A (en) * | 2019-04-22 | 2019-07-19 | 金华职业技术学院 | A kind of method for measuring Raman spectrum under cryogenic conditions |
| CN110031444B (en) * | 2019-04-22 | 2023-08-15 | 金华职业技术学院 | Raman spectrum measuring method under low temperature condition |
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Application publication date: 20170808 |