Ultramicro sampling reflection-type fiber Raman microprobe and manufacturing method thereof
A Raman probe and reflective technology, applied in the field of fiber optic Raman probes, can solve the problems of inconvenient adjustment of the optical path and poor flexibility of use, and achieve the effects of accurate measurement, enhanced efficiency, and reduced damage and impact
Active Publication Date: 2017-05-10
GUILIN UNIV OF ELECTRONIC TECH
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Problems solved by technology
However, the traditional optical tweezers are realized based on a relatively large microscope system, so the adjustment of the optical path is inconvenient and the flexibility of use is poor.
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[0039] The present invention will be further described below with examples in conjunction with the accompanying drawings.
[0040] The ultra-micro-sampling reflective optical fiber Raman probe of the present invention adopts such as Figure 2a The coaxial dual-channel fiber 1 shown, Figure 2b Indicates the distribution of the refractive index n of the fiber with the radius. This type of optical fiber is composed of a ring core 1-1, a coaxially distributed intermediate core 1-2 and a cladding.
[0041] The ultra-micro-sampling reflective optical fiber Raman probe of the present invention forms a rotationally symmetrical frustum of a cone (or arc-shaped frustum structure) 1-3, and then coat a layer of reflective film 1-7 on the side of its truncated cone structure, and then etch a groove 1-4 at the middle core of the fiber end of the coaxial dual-channel optical fiber, It is used to contain substances such as trace liquids or cells to be tested 4.
[0042] The form of the r...
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The invention provides an ultramicro sampling reflection-type fiber Raman microprobe and a manufacturing method thereof. The Raman microprobe comprises coaxial two-channel optical fiber, a rotationally symmetrical reflection optical structure is formed on the end surface of the coaxial two-channel optical fiber through fine grinding, the ground structure is plated with a reflecting film, and a groove where micronanoscale substance is placed is sculptured in the end surface of the coaxial two-channel optical fiber; an annular core of the coaxial two-channel optical fiber is used for the transmission of exciting light, a middle core of the coaxial two-channel optical fiber is used for the collection of Raman scattered light, the rotationally symmetrical reflection optical structure plated with the reflecting film reflects and gathers the exciting light transmitted through the annular core and gathers the light on the substance to be detected placed in the groove, and the generated Raman scattered light is collected by the middle core and transmitted to a spectrograph to be subjected to analysis. According to the ultramicro sampling reflection-type fiber Raman microprobe and the manufacturing method thereof, through an optical fiber end cone body processing technology, the efficiency of interaction of light and trace material is greatly improved, and effective stimulating and acquisition of Raman spectrum of minute particles of microorganisms, living single cells and the like are achieved.
Description
technical field [0001] The invention relates to an optical fiber Raman probe. The invention also relates to a method for making an optical fiber Raman probe. Specifically, it is an ultra-micro-sampling reflective fiber Raman probe and a manufacturing method thereof. Background technique [0002] Raman spectroscopy is a technology that generates Raman scattering spectra to reflect the internal structure and molecular vibration information of substances through the interaction of light and substances. It is widely used in biomedicine, environmental testing, food safety and other fields. The design and manufacture of Raman probes is one of the key technologies in the development of Raman spectroscopy. [0003] In order to accurately realize the accuracy of ultra-micro-sampling Raman spectroscopy and raise the research of Raman spectroscopy to the molecular level of trace substances, two technical problems must be solved: [0004] (1) Since there are very few trace substance...
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IPC IPC(8): G01N21/65
Inventor 苑立波杨世泰
Owner GUILIN UNIV OF ELECTRONIC TECH