CAJ | 학술논문

为了提高解调精度，时间一致性和稳定性及降低仪器成本。利用非扫描式相关解调原理，设计了光纤法珀解调系统并进行了实验研究。建立光纤法珀解调系统的光学模型，进行了光学特性分析和参数优化；设计了光学系统和硬件解调系统。同时由于系统中存在大量背景光谱噪声、线性光分布不均匀及光纤端面的反射，导致不能准确检测出相关信号的极大值，为此提出了一种信号修正算法，能有效滤除噪声，提高了仪器的解调精度。实验结果表明：测量范围为10-40μm ，分辨率为8nm ，稳定性达到了7nm。该仪器能实现对传感器腔长的实时测量，且测量精度高、稳定性和一致性好。
위료제고해조정도，시간일치성화은정성급강저의기성본。이용비소묘식상관해조원리，설계료광섬법박해조계통병진행료실험연구。건립광섬법박해조계통적광학모형，진행료광학특성분석화삼수우화；설계료광학계통화경건해조계통。동시유우계통중존재대량배경광보조성、선성광분포불균균급광섬단면적반사，도치불능준학검측출상관신호적겁대치，위차제출료일충신호수정산법，능유효려제조성，제고료의기적해조정도。실험결과표명：측량범위위10-40μm ，분변솔위8nm ，은정성체도료7nm。해의기능실현대전감기강장적실시측량，차측량정도고、은정성화일치성호。
To achieve high accuracy, stability, time consistency and lower the production cost. This paper designs a fiber optic Fabry-Perot demodulated system based on non-scanning correction demodulated theory and experiments are carried out. Correspond-ed optical model is set up and optical characteristics analysis and parameters optimization are completed, optical system and embed-ded demodulated system are designed. Due to the background spectrum noise, uneven distribution of linear light, reflection on the op-tical fiber end, the system cannot detect the maximum correction signal. This paper proposes a signal correction algorithm which can filter out noise, has improved the demodulated accuracy. the experimental results indicates that the demodulated system can realize re-al time measurement of the sensor cavity ,the measure range of the demodulation system is 10-40 μm, resolution is 8 nm, a stability of 7 nm.