A rapid demodulation method for optical carrier based microwave interferometer

Zhen Chen; Gerald Hefferman; Tao Wei

doi:10.1117/12.2223851

12 May 2016 A rapid demodulation method for optical carrier based microwave interferometer

Zhen Chen, Gerald Hefferman, Tao Wei

Proceedings Volume 9852, Fiber Optic Sensors and Applications XIII; 98520U (2016) https://doi.org/10.1117/12.2223851
Event: SPIE Commercial + Scientific Sensing and Imaging, 2016, Baltimore, MD, United States

Abstract

This paper presents a rapid signal processing approach for OCMI system, which could significantly reduce the complexity of computations while maintaining decent performances. A direct phase demodulator can be pre-calibrated and applied to extract the absolute phase change to target reflectors at different locations, where the strain change can be found distributedly. Theoretical framework was conducted and to demo the concept, a strain test was performed with ultra-weak reflectors (-70 dB) under the OCMI system. The proposed method was applied to extract the distributed stain change along the fiber under test. Compared with the previous proposed method, no FIR filters and Fourier transform are involved. This algorithm holds the potential suitable for dynamic OCMI distributed sensing system.

Citation Download Citation

Zhen Chen, Gerald Hefferman, and Tao Wei "A rapid demodulation method for optical carrier based microwave interferometer", Proc. SPIE 9852, Fiber Optic Sensors and Applications XIII, 98520U (12 May 2016); https://doi.org/10.1117/12.2223851

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available