CAJ | 학술논문

光纤法布里-珀罗可调滤波器（FFP-TF）是组成光纤布拉格光栅（FBG）传感器解调系统的核心器件之一，其稳定性对解调精度的提高至关重要，而温度漂移是影响其稳定性的关键因素之一。针对实际应用中遇到的FFP-TF温漂问题，分析了温漂产生的原因和滤波器在给定驱动电压下中心波长随温度的变化关系，提出了一种温度控制与参考光栅相结合的复合温漂抑制方法，实验分析了相应温控装置的性能并将其成功用于FBG压力传感器的信号解调系统中。结果表明，基于该温漂抑制方法的FFP-TF解调方案，可广泛应用于FBG传感器系统中。
광섬법포리-박라가조려파기（FFP-TF）시조성광섬포랍격광책（FBG）전감기해조계통적핵심기건지일，기은정성대해조정도적제고지관중요，이온도표이시영향기은정성적관건인소지일。침대실제응용중우도적FFP-TF온표문제，분석료온표산생적원인화려파기재급정구동전압하중심파장수온도적변화관계，제출료일충온도공제여삼고광책상결합적복합온표억제방법，실험분석료상응온공장치적성능병장기성공용우FBG압력전감기적신호해조계통중。결과표명，기우해온표억제방법적FFP-TF해조방안，가엄범응용우FBG전감기계통중。
The fiber Fabry-Perot tunable filter ( FFP-TF) is the core of a fiber Bragg grating ( FBG) interrogation system, whose stability is a key factor for improving the interrogation accuracy but is affected by temperature drift . We analyze the causes of the temperature drift and the variation of the central wavelength of the tunable filter under a given driving voltage with temperature and then propose a compound temperature drift inhibition method that com -bines temperature control with a reference FBG .We carried out experiments on the performance of the temperature control device and apply our compound temperature drift inhibition method to the signal interrogation system of an FBG pressure sensor.The experimental results, given in Figs.8 and 9, and their analysis show preliminarily that the interrogation accuracy of the FBG pressure sensor is better than 0.5%F.S, thus enhancing the accuracy of the FBG interrogation system greatly .Therefore , the FFP-TF demodulation scheme based on the compound temperature drift inhibition method can be applied to a FBG pressure sensor .