CN106680260B - A kind of portable coherent antistockes Raman spectroscopy instrument - Google Patents
A kind of portable coherent antistockes Raman spectroscopy instrument Download PDFInfo
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- CN106680260B CN106680260B CN201510749716.6A CN201510749716A CN106680260B CN 106680260 B CN106680260 B CN 106680260B CN 201510749716 A CN201510749716 A CN 201510749716A CN 106680260 B CN106680260 B CN 106680260B
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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
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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
- G01N2021/653—Coherent methods [CARS]
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Abstract
A kind of portable coherent antistockes Raman spectroscopy instrument, it is related with the detection characterization of Raman active medium, the present invention is using coherent antistockes Raman spectroscopy technology, using a laser with fixed wavelength and Hollow-Core Photonic Crystal Fibers as light source, tunable laser can be replaced, has achieved the purpose that effectively reduce equipment instrument.The present invention includes solid state laser, Hollow-Core Photonic Crystal Fibers, two-phase color mirror, condenser lens, detector and data acquisition process unit.Solid state laser emits and Hollow-Core Photonic Crystal Fibers are sequentially placed along optical axis, filled with Raman active medium in Hollow-Core Photonic Crystal Fibers, the laser of solid state laser transmitting is converted into Stokes Raman light in Hollow-Core Photonic Crystal Fibers inside points, remaining laser is with Stokes Raman light after two-phase color mirror, it is focused on measured target by condenser lens again, after the rear light line focus lens focus to Anti-Stokes signal that measured target generates under two-beam photograph, it is reflected into again by two-phase color mirror on the detector of transmitting optical axis side, target components information is obtained by the acquisition process to detectable signal.
Description
Technical field
The present invention is a kind of portable coherent antistockes Raman spectroscopy instrument, is had with the detection characterization of Raman active medium
It closes, the present invention is using coherent antistockes Raman spectroscopy technology, using a laser with fixed wavelength and hollow photon
Crystal optical fibre realizes the anti stokes raman spectrum for obtaining sample to be tested, with conventional detection stokes light as light source
Raman spectrum is compared, and equipment instrument can be reduced, and reduces the interference of fluorescence or phosphorescence.
Background technology
An important branch of the Raman spectroscopy as spectral technique, in scientific research, industrial production, environmental monitoring and
The fields such as science and techniques of defence have played great function.Currently employed Raman spectroscopy mostly uses the side of detection stokes light
Formula, the interference such as generally existing phosphorescence, and also it is less efficient due to spontaneous Raman scattering, generally require longer product
Stokes optical signal is collected between timesharing, this there is very big difficulty when detecting low component species so that low component
Or the Raman signal of the poor species of Raman active the case where being submerged.For the Raman light for obtaining in the certain spectral region of sample
Spectrum, current Raman spectrometer generally use monochromator and mode associated with ICCD or single point detector, this also greatly improved
Cost and equipment complexity.For the above problem present in Raman spectroscopy, the present invention proposes a solid state laser
It is combined with a Hollow-Core Photonic Crystal Fibers and generates pump light and stokes light, resonant excitation sample anti-stockes line
Method, detect the coherent anti-stokes Raman spectroscopy of sample, can avoid fluorescence or phosphorescence interference, effectively improve signal-to-noise ratio,
The use of Hollow-Core Photonic Crystal Fibers can replace the tunable laser such as dye laser or OPO, live in conjunction with Raman appropriate
Property medium generate need stokes light, equipment instrument can be substantially reduced, realize the miniaturization of detection instrument, be suitble to it is various
The Raman detection and characterization of medium.
Invention content
The shortcomings that present invention for normal Raman spectroscopy instrument includes coherent antistockes Raman spectroscopy instrument, using hollow light
Photonic crystal fiber is aided with Raman active medium appropriate and rational structure design, can generate this of appropriate spectral region
Lentor light can replace tunable laser, achieve the purpose that effectively reduce equipment instrument.
Particular content of the present invention includes：Solid state laser (1), Hollow-Core Photonic Crystal Fibers (2), two-phase color mirror (3) focus
Lens (4), detector (5) and data acquisition process unit (6)；It is characterized in that：Its set-up mode is one of the following two kinds；
First way, the laser that solid state laser is sent out enter hollow light from the incidence end with Hollow-Core Photonic Crystal Fibers
Photonic crystal fiber, Hollow-Core Photonic Crystal Fibers are interior filled with Raman active medium, and the laser of solid state laser transmitting is in hollow photon
Crystal optical fibre inside points are converted into Stokes Raman light, and remaining laser is with Stokes Raman light jointly by hollow photon crystal
The exit end output of optical fiber focuses on after two-phase color mirror, then by condenser lens on measured target, and measured target shines in two-beam
It after the backward Anti-Stokes signal light line focus lens focus of lower generation, then is reflected on detector by two-phase color mirror, is detected
The signal of device output is acquired and is handled by data acquisition and procession unit through data line again；
Or the second way, the laser that solid state laser is sent out enter sky from the incidence end with Hollow-Core Photonic Crystal Fibers
Heart photonic crystal fiber, Hollow-Core Photonic Crystal Fibers are interior filled with Raman active medium, and the laser of solid state laser transmitting is hollow
Photonic crystal fiber inside points are converted into Stokes Raman light, and remaining laser is with Stokes Raman light jointly by hollow photon
The exit end output of crystal optical fibre is focused on by condenser lens on measured target, the forward direction that measured target generates under two-beam photograph
Anti-Stokes signal light is incident on after two-phase color mirror filters on detector, and the signal of detector output is again through data line
It is acquired and is handled by data acquisition and procession unit；The measured target that the second way is surveyed is transparent sample.
The solid state laser used in the present invention can be optical fiber laser, semiconductor laser or YAG laser, or
Person can also be the laser of other any type small volumes.
Used Hollow-Core Photonic Crystal Fibers, which must pass through, to be rationally designed, and is reasonably selected the internal Raman active being filled with and be situated between
Matter so that the Stokes Raman light spectrum that Hollow-Core Photonic Crystal Fibers generate can cover the Stokes Raman of measured target
Light spectrum；The Raman active medium filled in Hollow-Core Photonic Crystal Fibers can be CH4, oxygen, nitrobenzene etc.；Or using appropriate
Material does fibre core, can generate the solid photonic crystal fiber of same or like Stokes optical wavelength, can also replace the sky
Heart photonic crystal fiber.
The light that more than optical wavelength that the dichroscope of use emits solid state laser (contains) is high thoroughly, for the wavelength with
Under light it is high anti-.
The condenser lens of use uses tightly focused mode (such as NA>0.1 or f<20mm), or micro- microscope group is used, it can be with
Improve signal light yield and collection efficiency.
One or more filters can also be increased between two-phase color mirror and detector, play the effect for filtering out stray light
Fruit can improve the signal-to-noise ratio of the present invention.Data acquisition and procession unit is computer or microcontroller.
Description of the drawings
Fig. 1 is the basic block diagram of the present invention, wherein：1- solid state lasers, 2- Hollow-Core Photonic Crystal Fibers, 3- two-phase colors
Mirror, 4- condenser lenses, 5- detectors, 6- data acquisition process units.
Fig. 2 is another form of the present invention, wherein：1- solid state lasers, 2- Hollow-Core Photonic Crystal Fibers, 3- two-phase colors
Mirror, 4- condenser lenses, 5- detectors, 6- data acquisition process units.
Specific implementation mode
For detailed description of the present invention specific work process and application method this is illustrated in conjunction with practical situations
The specific implementation mode of invention.
Embodiment 1 tests the methane content in mixed gas.
To detect coherent anti-Stokes Raman (CARS) spectrum of methane, adoptable solid state laser includes that YAG swashs
Light device, YLF laser etc. use gain media for the optical fiber laser of YAG in the present embodiment, Output of laser wavelength is about 1.06
Micron, pulsewidth are several nanoseconds, and corresponding Hollow-Core Photonic Crystal Fibers are designed using band gap type, inside fill there are one atmospheric pressure
Pure CH4For gas as raman gain medium, it is micro- that 1.06 mum lasers in Hollow-Core Photonic Crystal Fibers inside points are converted into about 1.54
The stokes light of rice, pulsewidth is suitable with optical-fiber laser, and the light exported from Hollow-Core Photonic Crystal Fibers includes just 1.06 microns
With the laser of 1.54 microns of two wavelength, the two-phase color mirror 3 used in the present embodiment leads to (longpass) two-phase color mirror for long wave,
Cutoff wavelength is 1 micron, and the typical transmitance in 1.05 microns to 1.6 microns sections is more than 99%, at 700 nanometers to 1 micron wave
The reflectivity of section is 99% or more, and condenser lens 4 is using the microlens of numerical aperture NA=1.1, the use of detector 5
The APD210 snowslide silicon photoelectric diodes of Thorlabs companies, data acquisition process unit 6 are homemade Signal acquiring and processing
Component integrates.The laser of optical fiber laser transmitting is after Hollow-Core Photonic Crystal Fibers, and a part is in hollow photon crystal light
Fine 2 inside points are converted into Stokes Raman light, remaining laser and Stokes Raman light jointly after two-phase color mirror 3, then by
Condenser lens 4 focuses in tested mixed gas pond, methane generated under the collective effect of two beam exciting lights after to it is relevant anti-this
Lentor optical signal, backward anti-Stokes light are converged by condenser lens 4 again, measured target two-beam photograph under generate it is rear to
It after Anti-Stokes signal light line focus lens 4 focus, then is reflected on detector 5 by two-phase color mirror 3, detector 5 and two-phase
Band pass filter or short-pass filter plate or dispersion element etc. can be increased in light path between Look mirror, to filter out Stokes
The interference of light and pump light can also filter out the interference of fluorescence, wherein the combination using notch filter and dispersion element can be more
Play more preferably effect relatively, the electric signal of detector output through data line by data acquisition and procession unit, will be electric
Signal is handled and is shown, you can obtains the concentration information of methane.Since the optical fiber laser that gain media is YAG can be done
To higher repetition rate (MHz), therefore portable stimlated Raman spectrum instrument according to the present invention may be implemented to target gas
The quick detection of body.
Embodiment 2 tests the content of the ethylene in mixed gas.
To detect coherent anti-Stokes Raman (CARS) spectrum of ethylene, use gain media for YAG in the present embodiment
Compact solid state laser, and carry frequency multiplication part, Output of laser wavelength is about 532 nanometers, pulsewidth be several nanoseconds, repeat
Frequency is 1KHz, and corresponding Hollow-Core Photonic Crystal Fibers are designed using band gap type, and the pure C there are one atmospheric pressure is filled in inside2H6Gas
As raman gain medium, 532nm meters of laser are converted into about 630 nanometers of Stokes in Hollow-Core Photonic Crystal Fibers inside points
Light, pulsewidth is suitable with Solid State Laser, and the light exported from Hollow-Core Photonic Crystal Fibers includes just about 532 nanometers and about 630 microns
The laser of two wavelength, the two-phase color mirror 3 used in the present embodiment lead to (longpass) two-phase color mirror for long wave, and cutoff wavelength is
530 nanometers, the typical transmitance in 530 nanometers to 650 nanometers sections is more than 99%, in 400 nanometers of reflections to 500 nano wavebands
Rate is 99% or more, and condenser lens 4 is using the microlens of numerical aperture NA=1.1, and detector 5 is using Thorlabs companies
APD210 snowslide silicon photoelectric diodes, data acquisition process unit 6 are that homemade Signal acquiring and processing component integrates.Gu
After Hollow-Core Photonic Crystal Fibers, a part is converted into the laser of body laser transmitting in 2 inside points of Hollow-Core Photonic Crystal Fibers
Stokes Raman light, remaining laser focus on after two-phase color mirror 3, then by condenser lens 4 jointly with Stokes Raman light
In tested mixed gas pond, ethylene generated under the collective effect of two beam exciting lights after to coherent optical signal, after
It is converged again by condenser lens 4 to anti-Stokes light, measured target generates rear to Anti-Stokes signal under two-beam photograph
It after light line focus lens 4 focus, then is reflected on detector 5 by two-phase color mirror 3, the light path between detector 5 and two-phase color mirror
On can increase band pass filter or short-pass filter plate or dispersion element etc., to filter out the dry of stokes light and pump light
It disturbs, the interference of fluorescence can also be filtered out, wherein can more be played relatively more preferably using the combination of notch filter and dispersion element
Effect, detector output electric signal through data line by data acquisition and procession unit, electric signal is handled simultaneously
Display, you can obtain the concentration information of ethylene.
Claims (8)
1. a kind of portable coherent antistockes Raman spectroscopy instrument, including：Solid state laser（1）, Hollow-Core Photonic Crystal Fibers
（2）, dichroscope（3）, condenser lens（4）, detector（5）With data acquisition process unit（6）；It is characterized in that：It is arranged
Mode is one of the following two kinds；
First way, the laser that solid state laser is sent out enter hollow photon crystal from the incidence end of Hollow-Core Photonic Crystal Fibers
Optical fiber, Hollow-Core Photonic Crystal Fibers are interior filled with Raman active medium, and the laser of solid state laser transmitting is in hollow photon crystal light
Fine inside points are converted into Stokes Raman light, and remaining laser is with Stokes Raman light jointly by Hollow-Core Photonic Crystal Fibers
Exit end output focuses on after dichroscope, then by condenser lens on measured target, and measured target generates under two-beam photograph
Backward Anti-Stokes signal light line focus lens focus after, then be reflected on detector by dichroscope, detector output
Signal acquired and handled by data acquisition and procession unit through data line again；
Or the second way, the laser that solid state laser is sent out enter hollow photon from the incidence end of Hollow-Core Photonic Crystal Fibers
Crystal optical fibre, Hollow-Core Photonic Crystal Fibers are interior filled with Raman active medium, and the laser of solid state laser transmitting is in hollow photon crystalline substance
Body inside of optical fibre point is converted into Stokes Raman light, and remaining laser is with Stokes Raman light jointly by hollow photon crystal light
Fine exit end output is focused on by condenser lens on measured target, this anti-support of the forward direction that measured target generates under two-beam photograph
Gram this signal light is incident on after dichroscope filters on detector, and the signal of detector output is again through data line by data
Acquisition is acquired and is handled with processing unit；
The Hollow-Core Photonic Crystal Fibers of use, which must pass through, to be rationally designed, and reasonably selects the internal Raman active medium being filled with, and is made
The Stokes Raman light light of measured target can be covered by obtaining the Stokes Raman light spectrum that Hollow-Core Photonic Crystal Fibers generate
Spectrum；
The Raman active medium filled in Hollow-Core Photonic Crystal Fibers is one or two or more kinds of in CH4, oxygen, nitrobenzene.
2. portable coherent antistockes Raman spectroscopy instrument according to claim 1, it is characterized in that：The solid of use swashs
Light device is optical fiber laser, semiconductor laser or YAG laser.
3. portable coherent antistockes Raman spectroscopy instrument according to claim 1, it is characterized in that：Or using appropriate
Material does fibre core, generates the solid photonic crystal fiber of same or like Stokes optical wavelength, to replace the hollow photon
Crystal optical fibre.
4. portable coherent antistockes Raman spectroscopy instrument according to claim 1, it is characterized in that：The dichroic of use
The light more than optical wavelength that mirror emits solid state laser is high thoroughly, high anti-for wavelength light below.
5. portable coherent antistockes Raman spectroscopy instrument according to claim 1, it is characterized in that：The focusing of use is saturating
Mirror uses tightly focused mode, or uses micro- microscope group, improves signal light yield and collection efficiency.
6. portable coherent antistockes Raman spectroscopy instrument according to claim 1, it is characterized in that：In dichroscope and
Also increase one or more filters between detector, play the effect for filtering out stray light, improves signal-to-noise ratio.
7. portable coherent antistockes Raman spectroscopy instrument according to claim 1, it is characterized in that：Second way institute
The measured target of survey is transparent sample.
8. portable coherent antistockes Raman spectroscopy instrument according to claim 1, it is characterized in that：Data acquire and place
It is computer or microcontroller to manage unit.
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110018149A (en) * | 2019-02-21 | 2019-07-16 | 中智科仪（北京）科技有限公司 | A kind of long-range Raman analyser based on the low recurrent frequency pulse laser device of 532nm |
| CN112097953B (en) * | 2020-09-21 | 2022-03-01 | 上海交通大学 | High-frequency two-color coherent anti-Stokes Raman spectrum temperature measuring device and method |
| CN112748100B (en) * | 2020-12-23 | 2022-03-01 | 华中科技大学 | System and method for analyzing spectral components of methane in MOCVD (metal organic chemical vapor deposition) based on femtosecond CARS (coherent anti-coherent emitter-emitter) |
| CN114088688B (en) * | 2022-01-17 | 2022-06-17 | 武汉光谷航天三江激光产业技术研究院有限公司 | Automatic collimation backward CARS detection system and method of all-fiber structure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103219638A (en) * | 2013-03-18 | 2013-07-24 | 深圳大学 | Super-continuum spectrum light source and coherent anti Stokes Raman scattering imaging system |
| CN103280693A (en) * | 2013-05-27 | 2013-09-04 | 深圳市盛世领航光电有限公司 | Gas RGB (Red Green Blue) laser and method for generating RGB three-color laser light |
| CN104713866A (en) * | 2013-12-15 | 2015-06-17 | 中国科学院大连化学物理研究所 | Device for broadband CARS detection of 1 delta oxygen and use method thereof |
| CN104834149A (en) * | 2015-04-15 | 2015-08-12 | 天津大学 | Single-fiber-type CARS excitation source device and realization method based on two-stage non-linear tuning |
-
2015
- 2015-11-05 CN CN201510749716.6A patent/CN106680260B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103219638A (en) * | 2013-03-18 | 2013-07-24 | 深圳大学 | Super-continuum spectrum light source and coherent anti Stokes Raman scattering imaging system |
| CN103280693A (en) * | 2013-05-27 | 2013-09-04 | 深圳市盛世领航光电有限公司 | Gas RGB (Red Green Blue) laser and method for generating RGB three-color laser light |
| CN104713866A (en) * | 2013-12-15 | 2015-06-17 | 中国科学院大连化学物理研究所 | Device for broadband CARS detection of 1 delta oxygen and use method thereof |
| CN104834149A (en) * | 2015-04-15 | 2015-08-12 | 天津大学 | Single-fiber-type CARS excitation source device and realization method based on two-stage non-linear tuning |
Non-Patent Citations (2)
| Title |
|---|
| Coherent supercontinuum generation in photonic crystal fiber with all-normal group velocity dispersion;Hooper L E et al.;《Optics express》;20110301;第19卷(第6期);正文第4页第1-2段，附图2 * |
| 基于超连续光谱激发的时间分辨相干反斯托克斯拉曼散射方法与实验研究;于凌尧等;《物理学报》;20100831;第59卷(第8期);第5406-5411页 * |
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