Method and device for detecting nanostructured staying quality poison material

A technology of toxic substances and nanostructures, applied in Raman scattering, material excitation analysis, etc., can solve the problems of not giving full play to the advantages of optical fiber technology, and achieve the effect of high measurement accuracy

Inactive Publication Date: 2008-10-08
ANHUI INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

However, this fiber optic application is preliminary and does not take advantage of fiber optic technology

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  • Method and device for detecting nanostructured staying quality poison material

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Embodiment Construction

[0011] see figure 1 .

[0012] The laser is used as an excitation light source for toxic substances to couple the laser light into the optical fiber. The laser enters the first circulator from port 1 of the first circulator, and is output from port 2. After being transmitted through the optical fiber, the laser is irradiated on the nano-substrate with toxic substances , due to the surface-enhanced Raman scattering effect to generate Raman signal light, the Raman signal light with a frequency shift relative to the frequency of the excitation light source is collected by the optical fiber and then input from port 2 of the first circulator, output from port 3, and then enters through the optical fiber The port 1 of the second circulator reaches the tunable fiber Bragg grating from the port 2 of the second circulator, and the signal light is made by adjusting the reflection center wavelength of the tunable fiber Bragg grating (the bandwidth of the tunable fiber Bragg grating is ge...

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Abstract

The invention discloses a detection method and a device for persistance toxic substance in a nanometer structure, laser is coupled into optical fiber by an optical maser which is as excitation light source of the toxic substance, and then the optical master enters into the first circulator, the laser is exported from the first circulator and is shone down nano-substrate adhered to the toxic substance, a frequency excursion Raman signal relative to frequency of the laser light source is returned to the first circulator because of that Raman scattering effect is strengthened in the surface and Raman signal light is generated, then signal light which is arrived to the second circulator and pass through a tunable fiber Bragg grating is returned into the second circulator, and is exported into a light detector from a detecting interface, light intensity of the signal light is measured by the light detector, then the toxic substance which is to be detected is decerned. In the invention, the tunable fiber Bragg grating is adjusted, if the light signal is detected by the light detector, then the frequency of the light signal is obtained by adjusting the state of an adjustment device of the tunable fiber Bragg grating, therefore, the toxic substance which is to be detected can be detected. The invention has advantages of high detection accuracy and easy operation.

Description

technical field [0001] The invention relates to a nanostructure persistent toxic substance (PTS) detection method and device. Background technique [0002] When trace amounts of persistent toxic substances (PTS) exist in the environment, specific sensitive structures will strongly adsorb and enrich them, leading to significant changes in the intrinsic properties of materials. For example, nanostructured materials based on silver particles, when adsorbing organic molecules, on the one hand, the localized surface plasmon resonance (LSPR) of silver nanoparticles produces an electric field enhancement effect, which significantly enhances the local field of the sensitive unit. , so that the Raman scattering signal is enhanced, on the other hand, the chemical environment (electron resonance and charge transfer resonance effect) of the adsorbed organic molecules also makes the Raman signal significantly enhanced, resulting in surface-enhanced Raman scattering (Surface-enhanced Rama...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/65
Inventor 毛庆和廖艳林
Owner ANHUI INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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