CN105044075B - A kind of Raman spectrometer mini optical fibre detection probe - Google Patents
A kind of Raman spectrometer mini optical fibre detection probe Download PDFInfo
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- CN105044075B CN105044075B CN201510353851.9A CN201510353851A CN105044075B CN 105044075 B CN105044075 B CN 105044075B CN 201510353851 A CN201510353851 A CN 201510353851A CN 105044075 B CN105044075 B CN 105044075B
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Abstract
The invention discloses a kind of Raman spectrometer mini optical fibre detection probe, including optical fiber circulator, the fibre-optical probe component with focusing on and filtering, bragg grating, optical cable, the input interface and output interface of Raman spectrometer；The output interface connection optical fiber circulator of the Raman spectrometer, the optical fiber circulator connects fibre-optical probe component by optical cable, the bragg grating is connected between the input interface of Raman spectrometer and optical fiber circulator, laser transmits to sample surfaces, scattering light from output interface, optical fiber circulator, fibre-optical probe component transmitted successively by fibre-optical probe component, optical fiber circulator, bragg grating to the input interface of Raman spectrometer successively.The present invention is simple in construction, easy to use, and exciting light and collection light all walk same optic fibre light path, and collection efficiency is high, simple in construction, and the probe detection of miniature probe formula can be achieved.
Description
Technical field
The present invention relates to a kind of probe of laser Raman spectrometer, more particularly to a kind of miniature light of Raman spectrometer
Fine detection probe.
Background technology
As scientific research and general marketplace are to the not broken height of live, quick, the accurate detection demand of material molecular structure
Rise, the Raman spectrometer of portability is constantly favored by each research institution.The continuous miniaturization of instrument correspondingly also requires to draw
The miniaturization of graceful detection probe.For current Raman detection probe although also with optical fiber output, the front end of probe is still use
Free space light path.Raman probe excites as the collimation of light beam, scatters light collection, faint Raman diffused light filtering extraction,
The function of spuious light shield, determines the complexity of the Raman detection probe light path of space optical path, and the compactedness of structure is also significantly
It is restricted.Which results in the Raman probe of current commercialization can be only applied to sample surfaces detection, and can not be applied to more
Narrow space, for example, archaeology or medically inside the field such as in situ detection, diagnosis.Therefore design one kind is needed generally to answer
Use various occasions and can efficiently collect the micro Raman detection probe of Raman optical signal.
The content of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of Raman spectrometer to be detected with mini optical fibre
Probe, all -fiber light path can improve Raman scattering signal collection and energy coupling efficiency.
The present invention is achieved by the following technical solutions, and the present invention includes optical fiber circulator, with what is focused on and filter
Fibre-optical probe component, bragg grating, optical cable, the input interface and output interface of Raman spectrometer；The Raman spectrum
The output interface connection optical fiber circulator of instrument, the optical fiber circulator connect fibre-optical probe component, described Prague by optical cable
Fiber grating is connected between the input interface of Raman spectrometer and optical fiber circulator, and laser is successively from output interface, fiber optic loop
Shape device, fibre-optical probe component are transmitted to sample surfaces, and scattering light is successively by fibre-optical probe component, optical fiber circulator, Prague light
Fine grating is transmitted to the input interface of Raman spectrometer.
The optical fiber circulator is one-way transmission optical device, the optical fiber circulator include first port, second port and
3rd port, the first port unilaterally connected second port, the port of second port unilaterally connected the 3rd, the Raman spectrometer
Output interface, first port, second port and optical cable be sequentially connected transmission optical signal, the optical cable, second port, the 3rd end
Mouth and bragg grating are sequentially connected transmission optical signal.
Optical fiber circulator can realize that single fiber bi-directional transmits, and the optical signal of first port input is only defeated in second port
Go out, the optical signal of second port input only exports in the 3rd port, can so make to use a light in fibre-optical probe component
Fibre transmitting-receiving optical signal, improve the collection efficiency of probe.
The fibre-optical probe component includes optical fiber, lock pin, lens, sleeve pipe, the end insertion lock pin of the optical fiber and fixation
It is connected in lock pin, the lens are self-focusing or self-focus lenses, and the lens and lock pin are separately fixed in sleeve pipe, described
One end end of lens is directed at fixation with fiber end face, the other end end of lens be provided be used to filtering out anti-Stokes spectrum and
The logical filter coating of long pass filter or plating length of veiling glare.
Fibre-optical probe component is that exciting light and the scattering light being collected into are focused by self-focusing or self-focus lenses
Or collimation, self-focusing or self-focus lenses end face can directly be directed at fixation with fiber end face, can so avoid space optical path
Intercouple caused light loss between optical fiber, greatly improves collection efficiency, while the diameter of self-focusing or self-focus lenses
General very small, only 0.9~1.8mm, it is ensured that the structure of probe assembly is closely.
Second port of the exciting light through optical fiber circulator is inputted into lens, is got to after over-focusing or collimation on sample.Dissipate
Penetrate light and be input to bragg grating through lens again coupled into optical fibres and by the 3rd port of optical fiber circulator.
The optical fiber, lock pin, lens, sleeve pipe outer cladding are packaged with sheath.Fibre-optical probe component can further be protected.
The lock pin is glass lock pin or ceramic insertion core, the cladding outer diameter phase of the internal diameter of the lock pin and the optical fiber
Match somebody with somebody, the external diameter of the lock pin and the internal diameter of described sleeve pipe match, and the optical fiber inserts lock pin after removing coat and uses epoxy
Glue or ultraviolet light adhesive curing.
One of preferred embodiment as the present invention, is solidified between the lens and lock pin by ultraviolet light gluing knot.Lens
The light that optical fiber comes out can be focused on certain point, it is directional light that light can also be collimated output, with specific reference to the spy of sample
Property selects.
As one of preferred embodiment of the present invention, described sleeve pipe is glass bushing or stainless steel sleeve pipe, described sleeve pipe, lock pin
It is integrated with lens by epoxy glue or ultraviolet light adhesive curing.
As one of preferred embodiment of the present invention, the connecting end surface of the lock pin and lens fills after being ground to 8 ° of angles respectively
Match somebody with somebody.The influence of interface reflection can be reduced.
The centre wavelength of the bragg grating is equal to the wavelength of laser on Raman spectrometer.
Bragg grating is that the incident light field pattern that is concerned with is write into fibre core by the method for ultraviolet photoetching, in fibre core
Interior produce changes along the refractive index periodic of fibre core axial direction, and it is one arrowband (transmission or reflection) of formation in fibre core that it, which is acted on,
Wave filter or speculum.When light beam passes through fiber grating, reflection will be produced by meeting the wavelength of fiber grating Bragg condition,
Remaining wavelength continues to transmit through fiber grating, and grating fibers have that wavelength selectivity is good, added losses are small, device is miniature
Change, coupling is good, the advantages that being combined together with optical cable or other optical fibre devices.The scattering light arrived through fibre-optical probe collect components
In Rayleigh scattering light filtered by bragg grating after be suppressed, only stay Raman diffused light to pass through.
One of preferred embodiment as the present invention, the input interface and output interface of the Raman spectrometer are SMA
905 interfaces.
The present invention has advantages below compared with prior art：The present invention is simple in construction, easy to use, exciting light and collection light
Same optic fibre light path all is walked, collection efficiency is high, simple in construction, and the probe detection of miniature probe formula can be achieved.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the structural representation of fibre-optical probe component.
Embodiment
Embodiments of the invention are elaborated below, the present embodiment is carried out lower premised on technical solution of the present invention
Implement, give detailed embodiment and specific operating process, but protection scope of the present invention is not limited to following implementation
Example.
As shown in figure 1, the present embodiment includes optical fiber circulator 1, the fibre-optical probe component 2 with focusing on and filtering, Bradley
Lattice fiber grating 3, optical cable 4, the input interface 52 and output interface 51 of Raman spectrometer；The output interface of the Raman spectrometer
51 connection optical fiber circulators 1, the optical fiber circulator 1 connect fibre-optical probe component 2, the bragg fiber light by optical cable 4
Grid 3 are connected between the input interface 52 of Raman spectrometer and optical fiber circulator 1, and laser is successively from output interface 51, fiber optic loop
Shape device 1, fibre-optical probe component 2 are transmitted to sample surfaces, and scattering light is successively by fibre-optical probe component 2, optical fiber circulator 1, Bradley
Lattice fiber grating 3 is transmitted to the input interface 52 of Raman spectrometer.Input interface 52 and output interface 51 are that SMA 905 connects
Mouthful.
Optical fiber circulator 1 is one-way transmission optical device, and the optical fiber circulator 1 includes first port 11, second port 12
With the 3rd port 13, the unilaterally connected second port 12 of first port 11, the port 13 of 12 unilaterally connected of second port the 3rd, institute
Output interface 51, first port 11, second port 12 and the optical cable 4 for stating Raman spectrometer are sequentially connected transmission optical signal, described
Optical cable 4, second port 12, the 3rd port 13 and bragg grating 3 are sequentially connected transmission optical signal.
As shown in Fig. 2 fibre-optical probe component 2 includes optical fiber 21, lock pin 22, lens 23, sleeve pipe 24, the end of optical fiber 21 is inserted
Enter lock pin 22 and be fixedly connected in lock pin 22, the lens 23 are GRIN Lens 23, and the lens 23 divide with lock pin 22
It is not fixed in sleeve pipe 24, one end end of the lens 23 is directed at fixation, the other end end of lens 23 with the end face of optical fiber 21
Provided with the long pass filter 25 for filtering out anti-Stokes spectrum and veiling glare, logical filter can be grown in other embodiment with plating
Film.
Optical fiber 21, lock pin 22, lens 23, the outer cladding of sleeve pipe 24 are packaged with sheath 26.One can be entered to fibre-optical probe component 2
Step protection.
The lock pin 22 of the present embodiment is glass lock pin 22, and other embodiment can be with Ceramics lock pin 22, the lock pin 22
The cladding outer diameter of internal diameter and the optical fiber 21 match, the external diameter and the internal diameter of described sleeve pipe 24 of the lock pin 22 match,
The optical fiber 21, which removes, inserts lock pin 22 after coat and with epoxy glue 27 or ultraviolet light adhesive curing.
Solidified between lens 23 and lock pin 22 by ultraviolet light gluing knot.The light that lens 23 can come out optical fiber 21 focuses on
Onto certain point, it is directional light that light can also be collimated output, is selected with specific reference to the characteristic of sample, the present embodiment is selected certainly
Condenser lens 23, self-focus lenses 23 can be selected in other embodiment.
Sleeve pipe 24 is glass bushing 24, and other embodiment can be selected stainless steel sleeve pipe 24, described sleeve pipe 24, lock pin 22 and thoroughly
Mirror 23 is integrated by epoxy glue or ultraviolet light adhesive curing.
When fibre-optical probe component 2 assembles, optical fiber 21 inserts lock pin 22 after cutting end face first, at the horn mouth of lock pin 22
Ultraviolet optical cement or epoxy glue is added to fix, it is then that the end surface grinding of lock pin 22 is smooth, then by lock pin 22 and lens 23 respectively from both ends
Plug-in-sleeve 24 and with ultraviolet light adhesive curing, the end face long pass filter 25 of ultraviolet light glue of lens 23 finally will be above-mentioned
Component loads sheath 26 and is packaged protection.In the present embodiment, the end face of lock pin 22 and lens 23 can be ground into 8 ° of angle dresses
With fixation, it can so reduce the influence of interface reflection.
During assembling, input interface 52 and output interface 51 are connected respectively to input and the output optical fibre of Raman spectrometer
In flange.In the present embodiment, the specific path of light is：Laser reaches the first port 11 of optical fiber circulator 1 through output interface 51,
And exported from second port 12 via optical cable 4 to fibre-optical probe component 2.GRIN Lens 23 is by laser in fibre-optical probe component 2
Focus on testing sample, the scattering light excited will scatter anti-in light by the long pass filter piece on the end face of GRIN Lens 23
Stokes spectrum and veiling glare are re-coupled to after filtering out in optical fiber 21.The scattering light being collected into reaches fiber optic loop through optical cable 4
The second port 12 of shape device 1 inputs, and is exported from the 3rd port 13 of optical fiber circulator 1 to bragg grating 3, Prague
Fiber grating 3 can will be filtered out with excitation wavelength identical Rayleigh scattering light in incident light and exported enterprising to Raman spectrometer
Row spectral scan is differentiated.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should be included in the scope of the protection.
Claims (9)
1. a kind of Raman spectrometer mini optical fibre detection probe, it is characterised in that including optical fiber circulator, with focusing and filter
Fibre-optical probe component, bragg grating, optical cable, the input interface and output interface of Raman spectrometer of light；The Raman
The output interface connection optical fiber circulator of spectrometer, the optical fiber circulator connect fibre-optical probe component, the cloth by optical cable
Glug fiber grating is connected between the input interface of Raman spectrometer and optical fiber circulator, and laser is successively from output interface, light
Fine circulator, fibre-optical probe component are transmitted to sample surfaces, and scattering light is successively by fibre-optical probe component, optical fiber circulator, Bradley
Lattice fiber grating is transmitted to the input interface of Raman spectrometer；The fibre-optical probe component includes optical fiber, lock pin, lens, sleeve pipe,
The end insertion lock pin of the optical fiber is simultaneously fixedly connected in lock pin, and the lens are self-focusing or self-focus lenses, described
Mirror and lock pin are separately fixed in sleeve pipe, and one end end of the lens is directed at fixation, the other end end of lens with fiber end face
Portion is provided with the logical filter coating of long pass filter or the plating length for being used for filtering out anti-Stokes spectrum and veiling glare.
A kind of 2. Raman spectrometer mini optical fibre detection probe according to claim 1, it is characterised in that the optical fiber
Circulator is one-way transmission optical device, and the optical fiber circulator includes first port, second port and the 3rd port, described first
Port unilaterally connected second port, the port of second port unilaterally connected the 3rd, the output interface of the Raman spectrometer, first end
Mouth, second port and optical cable are sequentially connected transmission optical signal, the optical cable, second port, the 3rd port and bragg fiber light
Grid are sequentially connected transmission optical signal.
A kind of 3. Raman spectrometer mini optical fibre detection probe according to claim 1, it is characterised in that the light
Fibre, lock pin, lens, sleeve pipe outer cladding are packaged with sheath.
A kind of 4. Raman spectrometer mini optical fibre detection probe according to claim 1, it is characterised in that the lock pin
For glass lock pin or ceramic insertion core, the cladding outer diameter of the internal diameter of the lock pin and the optical fiber matches, the external diameter of the lock pin
Match with the internal diameter of described sleeve pipe, the optical fiber, which removes, inserts lock pin after coat and with epoxy glue or ultraviolet light adhesive curing.
A kind of 5. Raman spectrometer mini optical fibre detection probe according to claim 1, it is characterised in that the lens
Solidified between lock pin by ultraviolet light gluing knot.
A kind of 6. Raman spectrometer mini optical fibre detection probe according to claim 1, it is characterised in that described sleeve pipe
For glass bushing or stainless steel sleeve pipe, described sleeve pipe, lock pin and lens are integrated by epoxy glue or ultraviolet light adhesive curing.
A kind of 7. Raman spectrometer mini optical fibre detection probe according to claim 1, it is characterised in that the lock pin
Assembled after being ground to 8 ° of angles respectively with the connecting end surface of lens.
A kind of 8. Raman spectrometer mini optical fibre detection probe according to claim 1, it is characterised in that the Bradley
The centre wavelength of lattice fiber grating is equal to the wavelength of laser on Raman spectrometer, and the Rayleigh scattering in light path passes through Prague light
Fine grating filters.
A kind of 9. Raman spectrometer mini optical fibre detection probe according to claim 1, it is characterised in that the Raman
The input interface and output interface of spectrometer are the interfaces of SMA 905.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510353851.9A CN105044075B (en) | 2015-06-24 | 2015-06-24 | A kind of Raman spectrometer mini optical fibre detection probe |
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| CN201510353851.9A CN105044075B (en) | 2015-06-24 | 2015-06-24 | A kind of Raman spectrometer mini optical fibre detection probe |
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| CN105044075B true CN105044075B (en) | 2017-12-05 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106290300A (en) * | 2016-08-04 | 2017-01-04 | 同方威视技术股份有限公司 | Portable raman spectrometer |
| CN106323419A (en) * | 2016-09-30 | 2017-01-11 | 天津市誉航润铭科技发展有限公司 | Novel liquid level sensor |
| CN109507124A (en) * | 2018-12-01 | 2019-03-22 | 湖北理工学院 | A kind of plug-in type liquid molten steel composition device for fast detecting |
| CN109730640A (en) * | 2019-01-08 | 2019-05-10 | 北京信息科技大学 | Raman spectroscopy measurement probe based on fiber bragg grating |
| CN110006865A (en) * | 2019-04-10 | 2019-07-12 | 南京诺源医疗器械有限公司 | Hand-held laser fluorescence spectrum probe assembly |
| WO2021011470A1 (en) * | 2019-07-12 | 2021-01-21 | Massachusetts Institute Of Technology | Systems and methods for stochastically modulated raman spectroscopy |
| CN115420382B (en) * | 2022-08-16 | 2024-03-12 | 元珵科技(北京)有限公司 | Raman probe, working system and working method thereof |
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| CN203758916U (en) * | 2014-02-24 | 2014-08-06 | 南京派光信息技术有限公司 | Portable adjustable Raman probe |
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| CN101915742A (en) * | 2010-08-10 | 2010-12-15 | 北京路源光科技有限公司 | Raman technology based biodiesel on-line detector |
| CN102589700A (en) * | 2012-02-28 | 2012-07-18 | 武汉大学 | Optical fiber detecting probe head for portable raman spectrometer |
| CN103822910A (en) * | 2012-11-16 | 2014-05-28 | 福州高意通讯有限公司 | Raman probes for miniature Raman spectrometer |
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