Optical fiber ultraviolet sensing device based on interference array and implementation method
A technology of a sensing device and a realization method, which are applied in the field of optical fiber ultraviolet sensing devices based on interference arrays, can solve the problems of low sensitivity, high cost, difficult fabrication and the like, and achieve the effect of improving sensitivity
Active Publication Date: 2021-03-02
HARBIN UNIV OF SCI & TECH
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[0004] Therefore, in view of the problems of low sensitivity, poor long-term operation stability, high cost, and difficult fabrication of traditional ultraviolet detectors and pure nanomaterials, a new method with high sensitivity, good stability, low cost, simple fabrication, and good flexibility is proposed. Optical fiber ultraviolet sensing device and implementation method of interference array
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[0029] The following embodiments will describe the specific implementation of an interference array-based optical fiber ultraviolet sensing device and implementation method proposed by the present invention with reference to the accompanying drawings.
[0030] Such as figure 1As shown, the present invention provides a structure diagram of an interference array-based optical fiber ultraviolet sensing device and its implementation method. To the sensing unit (3), the light beam performs multi-level mode coupling and interference in the sensing unit (3), forming an interference array. When the external ultraviolet light intensity irradiating the sensing unit (3) changes, the refraction of the sensitive material The rate will change, and the mode coupling will occur when the light is transmitted to different fiber fusion surfaces, resulting in multi-order mode light, and finally interference occurs, and the interference spectrum drifts when it is transmitted to the spectrometer th...
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Abstract
The invention provides an optical fiber ultraviolet sensing device based on an interference array and an implementation method. The optical fiber ultraviolet sensing device comprises an ASE light source (1), an optical fiber coupler (2), a sensing unit (3), ultraviolet light (4), a photoelectric converter (5) and a signal processing module (6). According to the invention, the sensing is carried out through an optical fiber, the light emitted by the ASE light source generates an interference spectrum in a sensing unit cone region by utilizing the relationship between the refractive index and the carrier concentration of the nano material and the micro-nano optical fiber evanescent field sensing principle, the change of the external ultraviolet light intensity is measured by detecting the interference spectrum, through the signal processing module, the digital output is achieved, and the purpose of displaying on a computer is achieved. According to the invention, the size of the sensingunit is reduced, the sensing sensitivity is increased, and the sensing device can stably operate for a long time. And meanwhile, the output on a host can be carried out, so that the real-time monitoring of the ultraviolet light intensity is realized.
Description
technical field [0001] The invention belongs to the field of optical fiber sensing, and in particular relates to an interference array-based optical fiber ultraviolet sensing device and a realization method. Background technique [0002] The wavelength range of ultraviolet light is 400nm ~ 10nm, it is a kind of electromagnetic wave with low energy from visible light to X-ray. According to different bands, it is divided into three regions, UVA, UVB and UVC. Ultraviolet light in different regions has different effects on human production and life. Based on the various characteristics of ultraviolet light at different wavelengths, ultraviolet light detection technology is widely used in various fields, such as chemical analysis, environmental analysis, biological analysis, light skin analysis, etc. UV communication, UV interference, UV manufacturing, etc. With the rapid development of science and technology, in order to meet the needs of people's life and production, ultravi...
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Login to View More IPC IPC(8): G01N21/33G01N21/41G01N21/45G01N21/01
CPCG01N21/01G01N21/33G01N21/4133G01N21/45G01N2021/458
Inventor 冯月陈姣姣沈涛刘驰恭艾娜王振家梁涵宋明歆姜金刚
Owner HARBIN UNIV OF SCI & TECH