FIBER OPTIC APPARATUS FOR OXYGEN SENSING

摘要

The present specification relates to an optical fiber oxygen sensing device which includes a header unit forming interferential waves based on a principle of an optical fiber fabry-perot interferometer to lights emitted by a light source; and an optical spectrum analyzer which determines the existence of oxygen base on the existence of a change in a spectrum cycle of the interference waves. The header unit includes a sensing material of which a variable refraction rate is changed by being joined with oxygen. The spectrum cycle of the interferential waves is changed according to the variable refraction rate of the sensing material. The oxygen sensing device includes an optical fiber providing a moving passage or an optical waveguide of lights emitted by the light source by suing the total reflection of the lights, a polymer which function as two films of the optical fabry-perot interferometer by being spread on a tip end of the optical fiber or the optical wave guide; the sensing material which forms the interferential waves based on the principle of the optical fiber fabry-perot interferometer in respect to the lights emitted by the light source and incident via the optical fiber. The variable refractive rate of the sensing material is changed, and the spectrum cycle of the interferential waves are changed by the change in the variable refraction rate of the sensing material.