CN102288546A - Polymer photonic crystal fiber surface plasma resonance testing method and sensor - Google Patents
Polymer photonic crystal fiber surface plasma resonance testing method and sensor Download PDFInfo
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- CN102288546A CN102288546A CN2011101900422A CN201110190042A CN102288546A CN 102288546 A CN102288546 A CN 102288546A CN 2011101900422 A CN2011101900422 A CN 2011101900422A CN 201110190042 A CN201110190042 A CN 201110190042A CN 102288546 A CN102288546 A CN 102288546A
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Abstract
The invention relates to the fields of fiber sensing, detection of biochemical substances and acquisition of dynamic biochemical reaction information, and aims to provide a polymer photonic crystal fiber surface plasma resonance biochemical substance sensor. According to the technical scheme adopted for fulfilling the aim, a polymer photonic crystal fiber surface plasma resonance testing method comprises the following steps of: outputting broadband light source emergent light to a single mold fiber through a fiber connector; partitioning the emergent light into two paths according to light power by using a coupler; making the emergent light pass through a substance to be tested; and receiving two paths of light signals by using a spectrometer or a light power meter for processing with a computer, wherein one path of photonic crystal fiber plated with a silver film and a tested sample sensitive film serves as a detection signal light path, and the other path of photonic crystal fiber which is not plated with any film is taken as a reference signal light path. The method and the sensor are mainly applied to detection of biochemical substances and acquisition of dynamic biochemical reaction information.
Description
Technical field
The present invention relates to Fibre Optical Sensor and material and detect, particularly the biochemical substances detection range specifically relates to polymer photon crystal fiber surface plasma resonance method of testing and sensor.
Background technology
In many key areas in daily productive life,, demand is widely arranged for the detection and the analysis of biochemical substances such as medicine, environment, biology, food or the like.Since the eighties in last century, low loss fiber came out, optical fiber sensing technology was in the forward position of sensor technology development always, and became two key areas of optical fiber technology with Fibre Optical Communication Technology.Compare with traditional sensor, Fibre Optical Sensor itself is not charged, have anti-electromagnetic interference (EMI), electrical isolation, corrosion-resistant, essential safety, many reference amounts measure (temperature, stress, vibration, displacement, rotation, electromagnetic field, chemistry amount and biomass etc.), highly sensitive, light weight, volume little, can embed characteristics such as (objects), form optical fiber sensing network (itself just forms network the Intrinsical distributed fiberoptic sensor) easily and can enter the Internet and wireless network.Optical fiber sensing technology has the important social demand in a plurality of fields such as national security, Important Project, biological medicines and has broad application prospects.
And be at present FA unmarked based on the biochemical sensitive method of surface plasma resonance, detection technique in real time has very important application in chemistry, biological, environment and medicine and other fields.
The isoionic device of optical excitation commonly used mainly adopts prism-coupled, waveguide-coupled, optical fiber coupling, methods such as grating coupling.Prism-coupled is the method that occurs the earliest, comprises Otto method and Kretschmann-Reather method.Through the development of decades, the product that practicability occurred is applied to biochemical substances and detects.Yet size is big, and the cost height has greatly limited the range of application of prism-coupled.Fast development along with optical fiber fabrication technology, the demand that the sensor miniaturization is integrated, promoted the research and development of optical fiber coupling plasma resonance sensor, the optical fiber plasma sensor of many compact conformations has obtained research, single mode, multimode optical fiber such as metal-plated membrane, polarization maintaining optical fibre, tapered fiber, and the Bragg grating or the like.Though using to sensing of optical fiber provides attracting platform, in order to make optical fiber contact with the close of test substance, conventional single mode fiber often needs to remove the part covering by method physics or chemistry, has reduced the reliability of device.And have only specific high-order mode just to satisfy phase matching in the multimode optical fiber, sensitivity and stability too rely on the light source condition.
Many in recent years workers have proposed the spr sensor based on photonic crystal fiber, and this sensor mechanism is to swash mode coupling and realize resonance with the leakage mould of fibre core with along the plasma in the fibre-optical microstructure.Photonic crystal fiber accomplishes easily that with its structural design flexibly guided modes effective refractive index and test substance refractive index equate, thereby can realize the coupling and the resonance of core mode and surface plasma mould easily at the wavelength place of needs.And do not need as conventional fiber, to erode covering or draw very thin awl, make sensor design not have the encapsulation problem.Domestic and international many scientists and scholar have proposed much the design proposal based on photonic crystal fiber (PCF) surface plasma resonance sensor, and have made a large amount of simulations and calculating, demonstrate the huge advantage and the application prospect of this novel sensor.Hassani et al. had proposed the design concept based on microstructured optical fibers spr sensor and optimization type microfluid in 2006, had the sensitivity of 10-4RIU.Hautakorpi et al. in 2008 propose and numerical analysis three hole photonic crystal fiber spr sensors, wherein golden film is deposited on the inwall in three holes.Numerical result shows can obtain very little fibre loss and the sensitivity of 10-4RIU.
Yet the metal film that no matter evenly plates tens nanometers in the aperture of micron dimension is filled various test substances, and all incomparable difficulty and complicated is though existing bibliographical information is crossed plated film and fill method.
Summary of the invention
For overcoming the deficiencies in the prior art, make full use of the high-sensitive advantage of photonic crystal fiber surface plasma resonance sensor, a kind of polymer photon crystal fiber surface plasma resonance biochemical substances sensor is provided, for achieving the above object, the technical solution used in the present invention is: polymer photon crystal fiber surface plasma resonance method of testing, comprise the following steps: the wide spectrum light source emergent light is outputed in the single-mode fiber through the joints of optical fibre, be divided into two-way through coupling mechanism by luminous power again, through test substance, wherein one tunnel photonic crystal fiber is coated with silverskin and sample sensitive membrane as the detectable signal light path, another road photonic crystal fiber does not have plated film as reference signal light path, and employing spectrometer or light power meter are transferred to Computer Processing after receiving two ways of optical signals.
Photonic crystal fiber is coated with silverskin and the sample sensitive membrane as the detectable signal light path is: plate the silverskin of 40 nano thickness in the photonic crystal fiber exterior side wall, plate the molecule of sample sensitivity responsive thin in the silverskin outside again.
Polymer photon crystal fiber surface plasma resonance testing sensor constitutes: the photonic crystal fiber exterior side wall is coated with silverskin, plates the molecule of sample sensitivity responsive thin again in the silverskin outside.
Photonic crystal fiber is the polymetylmethacrylate photonic crystal fiber, is coated with silver film thickness 40 nanometers.
The present invention can bring following effect:
The present invention is from practical standpoint, adopt polymer photon crystal fiber to realize surface plasma resonance biochemical substances sensing, metal film does not need to be plated in the small pore, only need be plated in the exterior lateral sides of optical fiber, test substance detects at the optical fiber outside surface, do not need to be filled in the aperture yet, be convenient to repeatedly duplicate detection use of sensor-based system, save many troubles.And higher reliability, stability and sensitivity are arranged, be an innovation greatly of plasma resonance sensor-based system, and huge practical value is arranged;
Sensor-based system is the design of full optical fiber optical optical road, and debugging is simple, and it is convenient to use, and is convenient to reuse, and is highly sensitive, good reliability.
Description of drawings
Fig. 1 is polymethylmethacrylate (PMMA) photonic crystal fiber drawing in side sectional elevation.Exterior lateral sides is coated with the silverskin of thickness 40 nanometers, and the silverskin outside is coated with the molecule of sample sensitivity responsive thin, and test substance is distributed in around the optical fiber.
Fig. 2 is an analog optical fiber mould field pattern.
Fig. 3 (a) is the relation curve of basic mode limitation loss and optical wavelength, and curve 1,2 represents that respectively the sample refractive index is 1.33,1.335 situation (Δ λ
The peak≈ 6nm); (b) be light intensity detection sensitivity curve, luminous intensity sensitivity unit: per unit refractive index light intensity rate of change.
Fig. 4 is this new structure polymer photon crystal fiber surface plasma resonance biochemical substances sensing system structural drawing.Wherein: 1, wide spectrum light source, 2, isolator, 3, the joints of optical fibre, 4, single-mode fiber, 5, three-dB coupler, 6, testing sample, 7, plated film polymer photon crystal fiber not, 8, the plated film polymer photon crystal fiber, 9, spectrometer.
Embodiment
To achieve these goals, design a kind of based on polymer photon crystal fiber surface plasma resonance biochemical substances sensor.Technical scheme is as follows: a kind of polymer photon crystal fiber surface plasma resonance biochemical substances sensor, described photonic crystal fiber is polymethylmethacrylate (PMMA) photonic crystal fiber, its exterior side wall is coated with the silverskin of 40 nano thickness, plates the molecule of sample sensitivity responsive thin again in the silverskin outside.The biomolecule that is coupled on the vane can be caught the biomolecule that can carry out idiosyncrasy with it.And the surface plasma resonance condition is very responsive for the variation of surrounding environment, reaches the detection biochemical substances, obtains dynamic biochemical reaction information so that take the purpose of control in real time by variation (employing wide spectrum light source) or the light intensity variation (employing monochromatic source) of surveying output spectrum.
The new structure polymer photon crystal fiber surface plasma resonance biochemical substances sensor that the present invention proposes, from practical standpoint, propose to adopt polymer photon crystal fiber to realize surface plasma resonance biochemical substances sensing, metal film does not need to be plated in the small pore, only need be plated in the exterior lateral sides of optical fiber, test substance detects at the optical fiber outside surface, does not also need to be filled in the aperture, be convenient to repeatedly duplicate detection use of sensor-based system, save many troubles.And higher reliability, stability and sensitivity are arranged, be an innovation greatly of surface plasma resonance sensor-based system, and huge practical value is arranged.
Below in conjunction with accompanying drawing this sensor-based system is described further.As shown in Figure 1, polymer photon crystal fiber is simple in structure, makes easily, and exterior lateral sides is coated with the silverskin of 40 nanometer thickness and approaches the molecule of sample sensitivity is responsive, and test substance is distributed in around the optical fiber.
This sensing system is whole to be the design of full optical fiber optical optical road, and debugging is simple, stable high, good reliability.The wide spectrum light source emergent light through the joints of optical fibre in single-mode fiber, but long-distance transmissions, luminous power divides equally two the tunnel in three-dB coupler, through test substance, wherein one tunnel photonic crystal fiber is coated with silverskin and sample sensitive membrane as the detectable signal light path, another road photonic crystal fiber does not have plated film as reference signal light path, and spectrometer is transferred to Computer Processing after receiving two ways of optical signals.
Claims (4)
1. polymer photon crystal fiber surface plasma resonance method of testing, it is characterized in that, comprise the following steps: the wide spectrum light source emergent light is outputed in the single-mode fiber through the joints of optical fibre, be divided into two-way through coupling mechanism by luminous power again, through test substance, wherein one tunnel photonic crystal fiber is coated with silverskin and sample sensitive membrane as the detectable signal light path, another road photonic crystal fiber does not have plated film as reference signal light path, and employing spectrometer or light power meter are transferred to Computer Processing after receiving two ways of optical signals.
2. the method for claim 1, it is characterized in that, photonic crystal fiber is coated with silverskin and the sample sensitive membrane as the detectable signal light path is: plate the silverskin of 40 nano thickness in the photonic crystal fiber exterior side wall, plate the molecule of sample sensitivity responsive thin in the silverskin outside again.
3. a polymer photon crystal fiber surface plasma resonance testing sensor is characterized in that, constitute: the photonic crystal fiber exterior side wall is coated with silverskin, plates the molecule of sample sensitivity responsive thin again in the silverskin outside.
4. sensor as claimed in claim 3 is characterized in that photonic crystal fiber is the polymetylmethacrylate photonic crystal fiber, is coated with silver film thickness 40 nanometers.
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| CN2011101900422A CN102288546A (en) | 2011-07-07 | 2011-07-07 | Polymer photonic crystal fiber surface plasma resonance testing method and sensor |
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| CN2011101900422A CN102288546A (en) | 2011-07-07 | 2011-07-07 | Polymer photonic crystal fiber surface plasma resonance testing method and sensor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103398982A (en) * | 2013-07-25 | 2013-11-20 | 天津大学 | Method and sensor for testing surface plasmon resonance of pohotonic crystal fibers |
| CN105371981A (en) * | 2015-11-23 | 2016-03-02 | 大连理工大学 | Inner wall-silver plated and liquid crystal-filled hollow optical fiber surface plasmon resonance temperature sensor |
| CN108535194A (en) * | 2018-03-22 | 2018-09-14 | 深圳大学 | A kind of opto-acoustic microscopic imaging system and method based on surface plasma resonance |
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| CN1712931A (en) * | 2005-07-01 | 2005-12-28 | 曾祥楷 | Interference SPR chemical and biological sensor and system with fibre-optical microstructure Michelson |
| US20060170925A1 (en) * | 2005-02-02 | 2006-08-03 | Chii-Wann Lin | Biomolecular sensor system utilizing a transverse propagation wave of surface plasmon Resonance (SPR) |
| US20080267555A1 (en) * | 2005-05-17 | 2008-10-30 | Raman Kashyap | Plasmon-Polariton Refractive-Index Fiber Bio-Sensor with Fiber Bragg Grating |
| US7483140B1 (en) * | 2004-12-10 | 2009-01-27 | University Of Central Florida Research Foundation, Inc. | Micro integrated planar optical waveguide type SPR sensor |
| CN101413891A (en) * | 2008-11-21 | 2009-04-22 | 浙江大学 | Optical fiber sensor of plasma resonance microstructure |
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2011
- 2011-07-07 CN CN2011101900422A patent/CN102288546A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7483140B1 (en) * | 2004-12-10 | 2009-01-27 | University Of Central Florida Research Foundation, Inc. | Micro integrated planar optical waveguide type SPR sensor |
| US20060170925A1 (en) * | 2005-02-02 | 2006-08-03 | Chii-Wann Lin | Biomolecular sensor system utilizing a transverse propagation wave of surface plasmon Resonance (SPR) |
| US20080267555A1 (en) * | 2005-05-17 | 2008-10-30 | Raman Kashyap | Plasmon-Polariton Refractive-Index Fiber Bio-Sensor with Fiber Bragg Grating |
| CN1712931A (en) * | 2005-07-01 | 2005-12-28 | 曾祥楷 | Interference SPR chemical and biological sensor and system with fibre-optical microstructure Michelson |
| CN101413891A (en) * | 2008-11-21 | 2009-04-22 | 浙江大学 | Optical fiber sensor of plasma resonance microstructure |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103398982A (en) * | 2013-07-25 | 2013-11-20 | 天津大学 | Method and sensor for testing surface plasmon resonance of pohotonic crystal fibers |
| CN105371981A (en) * | 2015-11-23 | 2016-03-02 | 大连理工大学 | Inner wall-silver plated and liquid crystal-filled hollow optical fiber surface plasmon resonance temperature sensor |
| CN108535194A (en) * | 2018-03-22 | 2018-09-14 | 深圳大学 | A kind of opto-acoustic microscopic imaging system and method based on surface plasma resonance |
| CN108535194B (en) * | 2018-03-22 | 2021-01-08 | 深圳大学 | Photoacoustic microscopic imaging system and method based on surface plasma resonance |
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