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微波治癌是当今世界各国医学界的新动向,并已在实验室取得可喜的成效。微波是一门具有五十年历史并已相当成熟的学科,用它来辐照治癌的关键是精确地监控加热对象的温度。传统的手段无法胜任,光纤温度计的目的就在于此。 本课题研制的是强度型光纤温度检测系统。它利用GaAs半绝缘材料作感温元件,用石英光纤作传输光路,以相应的光强来表示温度。 本文进一步探讨二个问题:一是从电磁场理论出发,在光纤,GaAs一维模型基础上对GaAs材料的电导率S以及片厚进行理论分析,并给出有关公式和数据;二是对系统的光、电路总体进行了研究,以期解决光纤连接器、光纤微弯等引入误差,并还考虑了探头LED、PD等主要部件的互换性,力求达到实用的目的。
Cancer treatment by microwave is a new trend in the medical circles of all countries in the world today and has achieved gratifying results in the laboratory. Microwave is a 50-year-old and well-established discipline. The key to irradiating cancer with it is to precisely monitor the temperature of the heated object. The traditional means can not be qualified, the purpose of fiber optic thermometer lies in this. The subject developed is the intensity of optical fiber temperature detection system. It uses GaAs semi-insulating material for temperature sensing components, with quartz fiber transmission optical path to the corresponding intensity to represent the temperature. This article further explores two issues: First, starting from the electromagnetic field theory, based on optical fiber, GaAs one-dimensional model of the conductivity of GaAs material S and the thickness of the theoretical analysis, and gives the relevant formulas and data; the second is the system Light and circuit are studied in order to solve the introduction error of optical fiber connector, microbending of optical fiber, etc., and the interchangeability of main components such as LED and PD of the probe are also taken into consideration so as to achieve the practical purpose.