14 February 2005 Research and design of a large-phase shift-fringe-count interferometric fiber-optic accelerometer
Author Affiliations +
Proceedings Volume 5634, Advanced Sensor Systems and Applications II; (2005); doi: 10.1117/12.573743
Event: Photonics Asia, 2004, Beijing, China
Abstract
A novel scheme of a fringe count interferometric accelerometer is proposed. In view of practicability, the sensor must be made up of only fiber. Two 3dB directional couplers and singlemode fibers are used in this scheme to compose an imbalance Mach-Zehnder interferometer. Phase modulation is achieved by modulating LD frequency to scan the interference fringes. With special technique, only one PIN is needed to count and identify the moving direction of the interference fringes. The signal can be transmitted more than several kilometers in a pair of fibers. The two arms of the interferometer work at push-pull mode, which is favorable for temperature compensation. The resolution is significantly improved by fringe sub-division. A real-time dynamic vibration signal can be measured without distortion by this system.
© (2005) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jia Nian Cao, Ya Bin Zhang, Wei Xin Wang, Tao Hai, "Research and design of a large-phase shift-fringe-count interferometric fiber-optic accelerometer", Proc. SPIE 5634, Advanced Sensor Systems and Applications II, (14 February 2005); doi: 10.1117/12.573743; https://doi.org/10.1117/12.573743
PROCEEDINGS
8 PAGES


SHARE
KEYWORDS
Phase modulation

Interferometry

Sensors

Fiber optics sensors

Fiber optics

Interferometers

Modulation

Back to Top