Abstract

An intensity modulated fiber-optic position sensor, based on a fiber-to-bundle coupling and a readout system using a CMOS image camera together with fast routines for position extraction and calibration, is presented and analyzed. The proposed system eliminates alignment issues otherwise associated with coupling-based fiber-optic sensors, still keeping the sensing point free from detector electronics. In this study the robustness of the system is characterized through simulations of the system performance, and the outcome is compared with experimental results. It is shown that knowledge of the shape of the coupled power distribution is the single most important factor for high performance of the system. Further it is experimentally shown that the position extraction error can be improved down to the theoretical limit by employing a modulation function model well fitted to the real coupled power distribution.

© 2013 Optical Society of America

Image restoration in fiber-coupled imagers using space-variant impulse response characterization

Nojan Motamedi, Vitaliy Lomakin, and Joseph E. Ford
Appl. Opt. 56(14) 4003-4011 (2017)

Using a validated transmission model for the optimization of bundled fiber optic displacement sensors

Erik A. Moro, Michael D. Todd, and Anthony D. Puckett
Appl. Opt. 50(35) 6526-6535 (2011)

Quantitative analysis and temperature-induced variations of moiré pattern in fiber-coupled imaging sensors

Salman Karbasi, Ashkan Arianpour, Nojan Motamedi, William M. Mellette, and Joseph E. Ford
Appl. Opt. 54(17) 5444-5452 (2015)

Image processing for cameras with fiber bundle image relay

Stephen J. Olivas, Ashkan Arianpour, Igor Stamenov, Rick Morrison, Ron A. Stack, Adam R. Johnson, Ilya P. Agurok, and Joseph E. Ford
Appl. Opt. 54(5) 1124-1137 (2015)

Measurement of the phase shift between intensity and frequency modulations within DFB-LD and its influences on PGC demodulation in a fiber-optic sensor system

Kai Wang, Min Zhang, Fajie Duan, Shangran Xie, and Yanbiao Liao
Appl. Opt. 52(29) 7194-7199 (2013)