Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Phase-shifted demodulation technique with additional modulation based on a 3 × 3 coupler and EFA for the interrogation of fiber-optic interferometric sensors

Not Accessible

Your library or personal account may give you access

Abstract

A phase-shifted demodulation technique with a ${3} \times 3$ coupler and ellipse fitting algorithm (EFA) for the interrogation of interferometric sensors is proposed. To reduce the error of the EFA as to measure small phase signals, additional phase modulation is introduced. The additional modulation provides a walk of the operating point along the Lissajous ellipse large enough to permit calculation of the ellipse parameters at every moment. Experimental result shows that this technique demonstrates high accuracy and stability for measuring small phase signals. The setting of this technology expands the application of the EFA in fiber-optic phase demodulation technology.

© 2021 Optical Society of America

Full Article  |  PDF Article
More Like This
High-stability PGC demodulation technique with an additional sinusoidal modulation based on an auxiliary reference interferometer and EFA

Shengquan Mu, Benli Yu, Lei Gui, Jinhui Shi, Dong Guang, Cheng Zuo, Wujun Zhang, Xiaonan Zhao, and Xuqiang Wu
Opt. Express 30(15) 26941-26954 (2022)

Remote Michelson interferometric phase sensor based on dual-core fiber transmission and linear phase demodulation

Yuanshuo Bai, Weilin Xie, Songhan Liu, Haijun Zhou, Yinxia Meng, Ling Zhang, Wei Wei, and Yi Dong
Opt. Lett. 46(23) 5782-5785 (2021)

Large-range phase-difference sensing technology for low-frequency strain interrogation

Jinhui Shi, Dong Guang, Shili Li, Xuqiang Wu, Cheng Zuo, Lei Gui, Wujun Zhang, Guosheng Zhang, Qiang Ge, Gang Zhang, Rui Wang, and Benli Yu
Opt. Lett. 46(22) 5643-5646 (2021)

Data Availability

Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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 Optica member, or as an authorized user of your institution.

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

Figures (4)

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

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

Equations (5)

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

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

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved