Abstract

An improved peak-to-peak method is developed for interrogating the absolute cavity length of fiber optic extrinsic Fabry–Perot interferometric (EFPI) sensors with high resolution. A fiber Fabry–Perot tunable filter (FFP-TF) is used to scan the optical spectrum of an EFPI, and the problems caused by the nonlinear performance and poor repeatability of the FFP-TF are removed by using a wavelength calibration technique. A linear fitting is used to calculate the wavelength spacing between two adjacent apexes in the optical spectrum, and the cavity length can be retrieved using this wavelength spacing. The experimental results show that the measuring resolution is improved from 25 to 1μm, and a linear output is also obtained.

© 2008 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Wavenumber scanning-based Fourier transform white-light interferometry

Zhen Wang and Yi Jiang
Appl. Opt. 51(22) 5512-5516 (2012)

High-resolution and large dynamic range fiber extrinsic Fabry–Perot sensing by multi-extrema-tracing technique

Jiawei Mei, Xiaosheng Xiao, and Changxi Yang
Appl. Opt. 54(12) 3677-3681 (2015)

Characterization of FBG sensor interrogation based on a FDML wavelength swept laser

Eun Joo Jung, Chang-Seok Kim, Myung Yung Jeong, Moon Ki Kim, Min Yong Jeon, Woonggyu Jung, and Zhongping Chen
Opt. Express 16(21) 16552-16560 (2008)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (11)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (6)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription