CN203658266U - Raman spectrum enhancement device and Raman spectrum enhancement system based on extra-resonant cavity technology - Google Patents
Raman spectrum enhancement device and Raman spectrum enhancement system based on extra-resonant cavity technology Download PDFInfo
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- CN203658266U CN203658266U CN201320677152.6U CN201320677152U CN203658266U CN 203658266 U CN203658266 U CN 203658266U CN 201320677152 U CN201320677152 U CN 201320677152U CN 203658266 U CN203658266 U CN 203658266U
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Abstract
The utility model discloses a raman spectrum enhancement device and a raman spectrum enhancement system based on an extra-resonant cavity technology. The device comprises a laser device, a laser transmission optical fiber, an excitation crystal, a transmittance and reflection mirror, a frequency doubling crystal and a resonant cavity, wherein the laser device is used for supplying a laser source to raman detection and is connected with the excitation crystal through the laser transmission optical fiber; the excitation crystal generates laser with a specific wavelength; after being subjected to film plating, the transmittance and reflection mirror only permits light with a specific frequency to pass through and totally reflects light with other wavelengths; the frequency doubling crystal is used for changing the frequency of the laser; the resonant cavity is used for ensuring that the laser subjected to frequency change can realize total reflection. According to the device and the system, the shortcomings that a spectrum is not complete and inaccurate due to the weak raman effect during detection on low-component substances through an online raman spectrum can be overcome; online complicated multi-component substances can be effectively analyzed and detected by a raman spectrometer.
Description
Technical field
The utility model belongs to field of photoelectric technology, relates to a kind of Raman spectrum intensifier, relates in particular to a kind of Raman spectrum intensifier based on chamber exterior resonant cavity technology; Meanwhile, the utility model also relates to a kind of enhancing of the Raman spectrum based on chamber exterior resonant cavity technology system.The enhancing of Raman spectrum effect when the utility model is used for Raman spectrometer real time on-line monitoring gas, liquid or gas-liquid mixed material component, thus realize online Raman spectrum in the time detecting lower component materials, carry out accurately qualitative and quantitative analysis.
Background technology
When Raman scattering refers to light by medium, cause that because incident light and molecular motion interact light frequency changes, nineteen twenty-eight is found by India physicist Chandrasekhar La Laman.Raman spectrum analysis technology is a kind of contactless spectral analysis technique taking Raman scattering effect as basis, and it can carry out qualitative and quantitative analysis to the composition and structure of material.Raman spectroscopy measurement speed is fast, and application Raman spectrum analysis can accomplish that original position measures in real time, is conducive to the real time on-line monitoring of process control.From nineteen twenty-eight to 1940 year, Raman spectrum is the focus in research always, but due to Ramam effect too a little less than, people cannot detect the weak Raman scattering signal of research, in the time measuring, require sample volume enough large, colourless, without dust, without fluorescence etc.These shortcomings have restricted further research and the practical application of Raman spectrum to a great extent, and therefore, along with progress and the commercialization of the infrared spectrum technology forties, the status of Raman spectrum has been subject to great weakening.Because Raman diffused light is too faint, scientist is difficult to Raman scattering to be committed to practice in decades.Occur after laser from nineteen sixty, because laser has that monochromaticity is good, the advantage such as feature, especially spectral radiance density is high, lasing light emitter volume is little, lightweight, easy automation mechanized operation such as concentration of energy, output power be large, so the excitation source for Raman spectrometer by laser very soon, thereby make Raman spectrum obtain new starting point.Adopt laser as monochromatic source, sample molecule is energized into a certain virtual stake, excited molecule transits to a vibrational energy level different from ground state subsequently, and now, the frequency of scattered radiation will be different from incident frequency.The energy of vibration of this frequency change and ground state and final state is differential quite.This " inelastic scattering " light is just referred to as Raman scattering.The advantage of Raman spectrum is the quick of it, accurately, does not conventionally destroy sample (solid, semisolid, liquid or gas) when measurement, and sample preparation does not simply even need sample preparation.
Present Raman spectrum detects and can carry out directly carrying out direct FEEDBACK CONTROL for the specific targets of product completely.In actual Raman spectra qualitative quantitative test, the Obtaining Accurate of Raman From Spectral Signal is the key in whole Raman spectrum analysis flow process, only has signal accurately and reliably at the scene, just can talk about its qualitative, quantitative precision.Field monitoring is in the time of material low concentration, trace, its Ramam effect is not strong, Raman signal is fainter relatively, thereby causes the accuracy in the time carrying out online raman monitoring to reduce, and exactly these micro-material composition content are the materials that need most detection in online detection.
In view of this, how solving low concentration, micro substance detects this Raman spectrum and monitor the bottleneck problem of applying in process industry, is the thorny problem of at present online Raman spectrometer application, is also the problem that must solve.The utility model device is exactly based on resonator cavity total reflection principle, and the outer frequency doubling technology of binding cavity, strengthens Ramam effect, and high-quality Raman signal is provided, and Raman is detected more accurate for low concentration material, by producing far-reaching influence the future of process industry.
Utility model content
Technical problem to be solved in the utility model is: a kind of Raman spectrum intensifier based on chamber exterior resonant cavity technology is provided, high-quality Raman signal can be provided, Raman spectrum is detected more accurate for low concentration material, by producing far-reaching influence the future of process industry.
Meanwhile, the utility model provides a kind of Raman spectrum based on chamber exterior resonant cavity technology to strengthen system, and high-quality Raman signal can be provided, and Raman spectrum is detected more accurate for low concentration material, by producing far-reaching influence the future of process industry.
For solving the problems of the technologies described above, the utility model adopts following technical scheme:
Based on a Raman spectrum intensifier for chamber exterior resonant cavity technology, for the enhancing of liquid, gas and gas-liquid mixed material Raman signal in the time carrying out online Raman spectrum detection;
Described device comprises laser instrument, laser transmission fiber, excites crystal, saturating anti-mirror, frequency-doubling crystal and resonator cavity;
Described laser instrument provides LASER Light Source for Raman detection, and laser instrument is connected and excited crystal by laser transmission fiber, excites crystal to produce the laser of specific wavelength;
Described anti-mirror, through coating film treatment, only allows characteristic frequency light to pass through, the light of other wavelength of total reflection; Frequency-doubling crystal is used for changing sharp light frequency; Described resonator cavity can be realized total reflection for the laser that ensures to change after frequency.
As a kind of preferred version of the present utility model, described device comprises two saturating anti-mirrors, is arranged at respectively the both sides of frequency-doubling crystal; Saturating anti-mirror, frequency-doubling crystal are arranged in resonator cavity.
As a kind of preferred version of the present utility model, described resonator cavity comprises the catoptron that two sides is parallel to each other, between two catoptrons, places operation material, and two total reflective mirrors that form this resonator cavity are anti-mirror.
As a kind of preferred version of the present utility model, the completely reflecting mirror in described anti-mirror, frequency-doubling crystal and resonator cavity is integrated on a plated film crystal, and this plated film crystal transmissive is crossed the laser of characteristic frequency.
Raman spectrum based on chamber exterior resonant cavity technology strengthens a system, and described system comprises: above-mentioned Raman spectrum intensifier, Raman detector, the second optical fiber, Raman spectrometer;
Described Raman detector is set in the resonator cavity of described Raman spectrum intensifier, and Raman signal carries out spectral analysis by the second fiber optic conduction to Raman spectrometer.
The beneficial effects of the utility model are: the Raman spectrum intensifier based on chamber exterior resonant cavity technology the utility model proposes, system and method, realize real time on-line monitoring gas, the enhancing of raman spectral signal when liquid or gas-liquid mixed material component, by the wavelength shift of the specific wavelength laser to laser instrument transmitting, and use Fabry-Perot resonator cavity to make laser carry out multiple total reflection, reach the enhancing of laser and the object of enlarge active surface, overcome online Raman spectrum in the time detecting lower component materials, the incomplete inaccurate impact of the spectrogram causing a little less than Ramam effect, ensure that Raman spectrometer obtains effective analyzing and testing to online complicated multi-component material.
Brief description of the drawings
Fig. 1 is the principle schematic that the utility model Raman spectrum strengthens system.
Fig. 2 is the intra resonant cavity structural representation of the utility model device.
Embodiment
Describe preferred embodiment of the present utility model in detail below in conjunction with accompanying drawing.
Embodiment mono-
The utility model has disclosed a kind of Raman spectrum intensifier and system based on chamber exterior resonant cavity technology, the enhancing of raman spectral signal when the utility model device can be applicable to Raman spectrometer real time on-line monitoring gas, liquid or gas-liquid mixed material component, thereby realize online Raman spectrum in the time detecting lower component materials, can carry out qualitative and quantitative analysis accurately.Due to spectrum on line Test Field more complicated, severe, it is preferable states that online Raman spectrum detects by the scope of fiber optic conduction in 150m, so means for correcting of the present utility model is placed in analyzer house with online Raman detector agent set, simultaneously the structural volume of the utility model device less, use more convenient.
Below in conjunction with preferred embodiment, to the embodiment providing according to the utility model, feature and effect thereof, after detailed description, for object simply clearly, below appropriate omission the description of known technology in order to avoid those unnecessary details affect the description to the technical program.
Refer to Fig. 1, in the present embodiment, choose wavelength and be the laser of 808nm as laser instrument 1, for follow-up Raman detection provides excitation source, laser frequency and strengthen part and comprise: laser conduction optical fiber 2, excite produce 1064nm wavelength laser excite crystal 3, the saturating anti-mirror 6,7 that allows characteristic frequency laser to pass through, change the frequency-doubling crystal 4 of laser frequency, and ensure to change laser after frequency and can realize the Fabry-Perot resonator cavity 5 of total reflection; Fabry-Perot resonator cavity has been full of material to be detected in 5 chambeies, is provided with Raman detector 8 in cavity, and Raman signal conducts to Raman spectrometer 10 by optical fiber 9 and carries out spectral analysis.
As Fig. 2, Fig. 2 has disclosed the inner structure schematic diagram of above-mentioned resonator cavity, the saturating anti-mirror 6,7 that the permission characteristic frequency laser of selecting in the utility model passes through, change the frequency-doubling crystal 4 of laser frequency, and ensure to change laser after frequency and can realize the Fabry-Perot resonator cavity 5 of total reflection, in actual applications, can be integrated on a plated film crystal 11, plated film crystal 11 is characterised in that can be transmitted through the laser of characteristic frequency, change ad hoc laser frequency by frequency doubling technology, and the laser of characteristic frequency after total reflection frequency multiplication.
For the change of specific laser frequency, the laser of the 808nm that laser instrument 1 is launched, conducts by optical fiber 2, arrives and excites crystal 3 to produce the laser of 1064nm, then by the saturating anti-mirror 6 that only allows specific wavelength 1064nm to pass through, so the optical maser wavelength entering before frequency-doubling crystal 4 is 1064nm.Specific wavelength is that the laser of 1064nm passes through will change its original wavelength after frequency-doubling crystal 4, and the change of wavelength is the selected of frequency-doubling crystal, selects twice frequency-doubling crystal, and the half that the laser of 1064nm is converted into original wavelength is 532nm.
For specific laser enhancing, the laser after change frequency, in Fabry-Perot resonator cavity 5, carries out total reflection, and concussion strengthens repeatedly.Because we are provided with frequency-doubling crystal 4 in the time that laser enters Fabry-Perot resonator cavity, the laser that carries out total reflection in chamber can not lose through saturating anti-mirror above.The laser that carries out multiple total reflection enhancing in chamber repeatedly direct irradiation on material to be measured to be detected, produce Raman light, and carry out Raman signal collection by the Ramam effect detecting device 8 being placed in chamber, obtain the material Raman detection signal after strengthening, reach Raman spectrum imaging system by optical fiber 9, finally obtain the detection material Raman spectrogram after strengthening.
More than introduce Raman spectrum intensifier and the system of the utility model based on chamber exterior resonant cavity technology, the utility model is in disclosing said apparatus and system, also disclose a kind of Enhancement Method of above-mentioned Raman spectrum intensifier, described method comprises: the Ear Mucosa Treated by He Ne Laser Irradiation of laser instrument transmitting is excited to crystal, produce the laser of specific wavelength, arrive the saturating anti-mirror that only allows characteristic frequency light to pass through, filter out the parasitic light that may occur in all laser production processes; The saturating anti-mirror of choosing is identical with the wavelength that excites crystal to excite, and like this, enters after frequency-doubling crystal, and laser frequency becomes the change of multiple.Laser after change frequency, in resonator cavity, carries out total reflection and strengthens laser effect; Owing to being provided with frequency-doubling crystal in the time that laser enters resonator cavity, the laser that carries out total reflection in resonator cavity can not lose through saturating anti-mirror above again.The light frequency difference of carrying out total reflection enhancing in the laser resonant cavity of laser instrument transmitting, the laser that carries out multiple total reflection enhancing in chamber repeatedly direct irradiation on material to be measured to be detected, now carry out Raman signal collection, obtain the material Raman detection spectrogram after strengthening.
In sum, the Raman spectrum intensifier based on chamber exterior resonant cavity technology the utility model proposes, system and method, realize real time on-line monitoring gas, the enhancing of raman spectral signal when liquid or gas-liquid mixed material component, by the wavelength shift of the specific wavelength laser to laser instrument transmitting, and use Fabry-Perot resonator cavity to make laser carry out multiple total reflection, reach the enhancing of laser and the object of enlarge active surface, overcome online Raman spectrum in the time detecting lower component materials, the incomplete inaccurate impact of the spectrogram causing a little less than Ramam effect, ensure that Raman spectrometer obtains effective analyzing and testing to online complicated multi-component material.
Here description of the present utility model and application is illustrative, not wants scope of the present utility model to limit in the above-described embodiments.Here the distortion of disclosed embodiment and change is possible, and for those those of ordinary skill in the art, the various parts of the replacement of embodiment and equivalence are known.Those skilled in the art are noted that in the situation that not departing from spirit of the present utility model or essential characteristic, and the utility model can be with other form, structure, layout, ratio, and realize with other assembly, material and parts.In the situation that not departing from the utility model scope and spirit, can carry out other distortion and change to disclosed embodiment here.
Claims (5)
1. the Raman spectrum intensifier based on chamber exterior resonant cavity technology, for the enhancing of liquid, gas and gas-liquid mixed material Raman signal in the time carrying out online Raman spectrum detection; It is characterized in that:
Described device comprises laser instrument, laser transmission fiber, excites crystal, saturating anti-mirror, frequency-doubling crystal and resonator cavity;
Described laser instrument provides LASER Light Source for Raman detection, and laser instrument is connected and excited crystal by laser transmission fiber, excites crystal to produce the laser of specific wavelength;
Described anti-mirror, through coating film treatment, only allows characteristic frequency light to pass through, the light of other wavelength of total reflection; Frequency-doubling crystal is used for changing sharp light frequency; Described resonator cavity can be realized total reflection for the laser that ensures to change after frequency.
2. the Raman spectrum intensifier based on chamber exterior resonant cavity technology according to claim 1, is characterized in that:
Described device comprises two saturating anti-mirrors, is arranged at respectively the both sides of frequency-doubling crystal; Saturating anti-mirror, frequency-doubling crystal are arranged in resonator cavity.
3. the Raman spectrum intensifier based on chamber exterior resonant cavity technology according to claim 1, is characterized in that:
Described resonator cavity comprises the catoptron that two sides is parallel to each other, between two catoptrons, places operation material, and two total reflective mirrors that form this resonator cavity are anti-mirror.
4. the Raman spectrum intensifier based on chamber exterior resonant cavity technology according to claim 1, is characterized in that:
Completely reflecting mirror in described anti-mirror, frequency-doubling crystal and resonator cavity is integrated on a plated film crystal, and this plated film crystal transmissive is crossed the laser of characteristic frequency.
5. the Raman spectrum based on chamber exterior resonant cavity technology strengthens a system, it is characterized in that, described system comprises: Raman spectrum intensifier, Raman detector, the second optical fiber, Raman spectrometer that one of claim 1 to 4 is described;
Described Raman detector is set in the resonator cavity of described Raman spectrum intensifier, and Raman signal carries out spectral analysis by the second fiber optic conduction to Raman spectrometer.
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| CN201320677152.6U CN203658266U (en) | 2013-10-29 | 2013-10-29 | Raman spectrum enhancement device and Raman spectrum enhancement system based on extra-resonant cavity technology |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104568897A (en) * | 2013-10-29 | 2015-04-29 | 苏州拉曼检测技术有限公司 | Raman spectrum enhancement device, raman spectrum enhancement system and raman spectrum enhancement method based on external resonant cavity technology |
| CN114384059A (en) * | 2022-01-10 | 2022-04-22 | 北京华泰诺安技术有限公司 | Gas detection device and method |
-
2013
- 2013-10-29 CN CN201320677152.6U patent/CN203658266U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104568897A (en) * | 2013-10-29 | 2015-04-29 | 苏州拉曼检测技术有限公司 | Raman spectrum enhancement device, raman spectrum enhancement system and raman spectrum enhancement method based on external resonant cavity technology |
| CN104568897B (en) * | 2013-10-29 | 2017-12-12 | 中国计量大学 | Raman spectrum intensifier, system and method based on chamber exterior resonant cavity technology |
| CN114384059A (en) * | 2022-01-10 | 2022-04-22 | 北京华泰诺安技术有限公司 | Gas detection device and method |
| CN114384059B (en) * | 2022-01-10 | 2023-10-13 | 北京华泰诺安技术有限公司 | Gas detection device and method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140618 Termination date: 20151029 |
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| EXPY | Termination of patent right or utility model |