Repository hosted by TU Delft Library

Home · Contact · About · Disclaimer ·

Fiber interferometer combining sub-nm displacement resolution with miniaturized sensor head

Author: Cheng, L.K. · Hagen, R.A.J. · Schriek, L.N. · Toet, P.M. · Togt, O.E. van der
Publisher: SPIE
Source:Chung, Y.Jin, W.Lee, B.Canning, J.Nakamura, K.Yuan, L., 25th International Conference on Optical Fiber Sensor, 23-24 April 2017
Proceedings of SPIE
Identifier: 762575
Keywords: Electronics · Fiber optic · Interferometer · Fiber sensor · High Tech Systems & Materials · Industrial Innovation · Nano Technology · OPT - Optics · TS - Technical Sciences


The presented interferometer concept enables high-accuracy target displacement measurement in difficult accessible locations and the development of small fiber optic sensor to measure other physical parameters e.g. pressure, vibration, gravity force, etc.. Furthermore, this configuration is basically insensitive to disturbances to the lead fiber between the passive sensor head and the measurement system including the electro-optical parts and the detection interferometer. Two test setups are built and tested to demonstrate the feasibility of high-speed measurement up to 50 kHz, low system drift of ~0.5 nm over 500 s and a low displacement noise level down to 2.8 pm/√ Hz.