摘要
利用800 nm的飞秒激光在普通单模光纤上一次成型地制作一个微矩形槽作为法布里-珀罗(Fabry-Perot,F-P)于涉腔,然而,制作的F-P干涉腔端面粗糙、倾斜,使得该传感器只有～5 dB的对比度,为后续的信号处理带来了一定的困难,且在一定程度上降低了测量的准确性与可靠性。通过选择最佳的加工参数、改善加工环境和改进加工方法,制作出了平整度好、端面平行的F-P干涉腔,其对比度达到了～18 dB。此外,该F-P干涉传感器的全光纤结构使其能耐800℃的高温,为其在恶劣环境下工作提供了应用潜力。
A novel in-line Fabry-Perot interferometer is directly fabricated in a single mode fiber by the use of femtosecond lasers. The spectrum fringe of this interferometer has the visibility of --5 dB due to the rough and slopped cavity surfaces, making it more difficult for post signal processing and reducing the measurement accuracy and reliability. By choosing the optimal parameters, improving machining environments and methods, ideal Fabry- Perot cavities are fabricated, which are so smooth and parallel that the fringe visibility is as high as - 18 dB. In addition, with an accessible cavity and all-fiber structure, this sensor can work in high temperatures up to 800 , which is attractive for sensing applications in harsh environments.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2009年第6期1459-1462,共4页
Chinese Journal of Lasers
基金
国家自然科学重点基金(60537040)
重庆市自然科学基金(CSTC2008BB2165)
重庆大学骨干教师创新基金
重庆大学研究生创新基金资助课题
关键词
传感器
光纤光学
光纤传感器
飞秒激光加工
光纤F-P腔
sensors
fiber optics
optical fiber sensors
femtosecond laser processing
fiber Fabry-Perot cavity
