In recent years, distributed optical fiber temperature measurement system has been widely used in industrial safety field. In this paper, the principle of distributed optical fiber temperature measurement system is introduced and the system performance is tested. The design and development of self-calibration system without real-time temperature compensation is carried out. The measurement accuracy of the system is improved. The distributed optical fiber temperature measurement system with low power consumption and high performance has been applied in the goaf and cable temperature field of coal mine, which provides a favorable detection method for the safety detection of coal mine underground.
Surface Enhanced Raman Scattering (SERS) is typically observed with the substrate in a liquid medium and it has been proposed as a promising technique for detecting low levels of pollutants in liquids. The design and fabrication of an optical fibre SERS sensor based on Au nanoparticles (Au-NPs), which is self-assembly immobilized onto the end surface of an optical fibre is described. Two toxic materials, Rhodamine 6G (R6G) and crystal violet were analysed using this optical fibre SERS sensor combined with portable Raman spectrometer. Our proposed fabrication and analytical method offers a rapid, cheap and disposable trace detection capability for toxic materials in the field.
Surface enhanced Raman spectroscopy (SERS) is a fast, convenient and highly sensitive detection technique, and preparing the good effect and repeatable substrate is the key to realize the trace amount and quantitative detection in the field of food safety detection. In this paper, a surface enhanced Raman substrate based on submicrometer silver particles structure was prepared by chemical deposition method, and characterized its structure and optical properties.