CAJ | 학술논문

利用液体折射率与表面等离子共振技术( SPR)，研究了光纤传感器在液体中透射光功率的变化，提出了一种液体折射率光纤传感器。该传感器采用3 dB耦合器进行分光，利用输出波长范围为1530~1580 nm的ASE作为光源，以熔融拉锥光纤作为传感单元。利用该光纤传感器，对NaCl溶液浓度与透射光功率之间关系的进行了实验研究。研究结果表明传感器外部介质折射率越高，光的传输损耗越大。而且在锥区外部镀膜，能够有效地提高传感器的灵敏度。
이용액체절사솔여표면등리자공진기술( SPR)，연구료광섬전감기재액체중투사광공솔적변화，제출료일충액체절사솔광섬전감기。해전감기채용3 dB우합기진행분광，이용수출파장범위위1530~1580 nm적ASE작위광원，이용융랍추광섬작위전감단원。이용해광섬전감기，대NaCl용액농도여투사광공솔지간관계적진행료실험연구。연구결과표명전감기외부개질절사솔월고，광적전수손모월대。이차재추구외부도막，능구유효지제고전감기적령민도。
The change of transmission optical power of optical fiber sensor in the liquid was studied and the liquid refractive index optical fiber sensor was proposed. The sensor used a 3 dB coupler to divide light. The wavelength of the light source ASE ranged from 1 530 nm to 1 580 nm.The fused taper fiber was used as sensing unit.The relationship between the light power of the transmission spectrum and the NaCl solution concentration was analyzed by using the optical fiber sensor.The results show that the higher the refractive index of the sensor external medium is,the bigger the transmission loss is. And coating on the outside of the cone can effectively improve the sensitivity of the sensor.