摘要
传感器采用全保偏光纤系统消除偏振态的影响,采用光频调制相位载波(PGC)解调信号处理技术消除干涉仪初始相位差变化带来的影响,同时实现探测单元的全光化,适于远距离的探测和传输。实验测得在5～200Hz频段内,传感器灵敏度达到350rad/g,与理论分析基本一致;最小可测相位为10-5rad,最小可测加速度为2.8×10-7m/s2。
The experimental result of interferometric polarization-maintaining fiber optic accelerometer was represented. Because of polarization-maintaining structure, the system gets rid of instability of polarization. A phase generated carrier (PGC) scheme was used to demodulate the interferometer output to reduce the optical phase shift. The sensor has the character of all optical, which is convenient to be applied to the long distance detection and transport. The acceleration sensitivity reaches 350 rad/g in frequency band of 5-200 Hz. The results of experiment agree well with the theoretical analysis. Minimum measurable phase is 10-5 rad and the minimum measurable acceleration reaches 2.8×10-7 m/s2.
出处
《光电子．激光》
EI
CAS
CSCD
北大核心
2004年第6期675-678,共4页
Journal of Optoelectronics·Laser
