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Energy feedback-based all-fiber confocal Raman spectroscopy measurement method

An energy feedback and spectral measurement technology, applied in the field of spectral testing, can solve problems such as difficulty in improving confocal Raman spectral detection technology, and achieve the effects of improving positioning accuracy and lateral resolution, improving signal-to-noise ratio and sensitivity, and improving quality

Inactive Publication Date: 2018-09-28
SHANGHAI IDEAOPTICS CORP LTD
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Problems solved by technology

[0004] The purpose of the present invention is to provide an all-fiber high-resolution Raman spectroscopy measurement method and device with an energy feedback adjustment device to overcome the problem that the existing confocal Raman spectroscopy detection technology is difficult to improve

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  • Energy feedback-based all-fiber confocal Raman spectroscopy measurement method
  • Energy feedback-based all-fiber confocal Raman spectroscopy measurement method

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Embodiment Construction

[0028] The present invention will be further explained by way of examples below, but the present invention is not limited to the scope of the described examples. In the following examples, the experimental methods without specific conditions are selected according to conventional methods and conditions, or according to the product specification.

[0029] Such as figure 1 As shown, the optical signal emitted by the laser (1) is coupled into the optical path in the form of a single-mode fiber (2), and the laser is collimated by the collimator (4) through the fiber end face on the fiber adapter (3). The end face of the optical fiber on the optical fiber adapter (3) functions as a confocal pinhole.

[0030] The collimated laser enters the energy feedback adjustment device (5) to adjust the stability of the excitation light source. Stability and precise control of the excitation light source passes through the beam splitter (6) and the objective lens (7) to focus on the sample to be te...

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Abstract

The invention discloses an energy feedback-based all-fiber confocal Raman spectroscopy measurement method. An apparatus for realizing the method comprises a laser, four single-mode fibers, four fiberadapters, a collimator, an energy feedback adjustment device, two beam splitters, an objective lens, a measured sample, a Raman filter group, a Raman imaging lens, a Raman detector, two differential imaging lenses and two differential point detectors. The apparatus realizes the introduction of laser and the extraction of a Raman detection signal by the single-mode fibers, and accurately improves the longitudinal resolution of confocal Raman detection by replacing a traditional confocal pinhole with a fiber end face. The specifically designed laser energy adjustment feedback device is used to precisely design and adjust the stability of an excitation light source to make the fluctuation of the excitation light source and the detection Raman signal controlled within a certain range, so the signal-noise ratio and the sensitivity of long-time spectral acquisition and Raman imaging are greatly improved.

Description

Technical field [0001] The invention relates to the field of spectrum testing, in particular to an all-fiber confocal Raman spectrum measurement method based on energy feedback. Background technique [0002] In Raman spectroscopy, the difference in frequency between scattered light and incident light is called Raman shift. The study of Raman shift can obtain information on the vibration and rotation of chemical bonds in molecules, as well as the vibration information of the crystal lattice, which is an important Spectroscopic measurement technology for studying the microstructure of matter. The Raman spectroscopy measurement system is an advantageous tool for realizing the research of microscopic matter by Raman scattering technology. The existing high-performance Raman spectroscopy measurement system is mainly a confocal Raman spectroscopy measurement device, which is a technology that combines space imaging technology with Raman spectroscopy analysis technology. The different...

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Application Information

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IPC IPC(8): G01N21/65
CPCG01N21/65
Inventor 洪少欣李政红
Owner SHANGHAI IDEAOPTICS CORP LTD
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