测温用硫系玻璃红外光纤

Chalcogenide Glass IR Fiber for Temperature Measurement

硫系化合物玻璃是优良的红外光学材料。在七十年代国外已商品化,用硫系玻璃制成红外光导纤维也已有三十多年的历史,当时光纤的光损耗值较高(20dB/m),无法实用。近年来,随着石英光纤的飞速发展,其光损耗达到了理论计算值(0.2dB/km),但受熔石英材料红外本征吸收的影响,进一步降低光损耗已成为无法克服的问题。因此,红外光纤的研究和应用重新引起重视。

The excellent properties of chalcogenide glass IR fiber have been described, which has not only a wide range of transmission (0.6~16um), but also a large numerical aperture. The variation of thermal expansion coefficient and refractive index with temperature is also of high valne. The temperature sensor manufactured on the basis of the above mentionedproperties has a sensibility of . In the experiment the radiationtemperature-measurement was conducted in the range of 65~175℃, which could be further extended by modifying the composition of the fiber and by reducing the loss of light.