Application of low-coherence optical fiber Doppler anemometry to fluid-flow measurement: optical system considerations

William J. O. Boyle; Kenneth T. V. Grattan; Andrew W. Palmer; B. T. Meggitt

doi:10.1117/12.45978

1 August 1991 Application of low-coherence optical fiber Doppler anemometry to fluid-flow measurement: optical system considerations

William J. O. Boyle, Kenneth T. V. Grattan, Andrew W. Palmer, B. T. Meggitt

Author Affiliations +

Proceedings Volume 1511, Fiber Optic Sensors: Engineering and Applications; (1991) https://doi.org/10.1117/12.45978
Event: ECO4 (The Hague '91), 1991, The Hague, Netherlands

Abstract

A fiber optic Doppler anemometric (FODA) sensor using an optical delay cavity technique and having the advantage of detecting velocity rather than simple speed is outlined. In this sensor the delay in a sensor cavity formed from light back-reflected from a fiber tip (Fresnel reflection) and light back-reflected from particles flowing in a fluid is balanced by the optical delay when light from this sensor cavity passes through a reference cavity formed by a combination of the zero and first diffraction orders produced by a Bragg cell inserted into the optical arrangement. The performance of an experimental sensor based on this scheme is investigated, and velocity measurements using the Doppler shift data from moving objects are presented. The sensitivity of the scheme is discussed, with reference to the other techniques of fluid flow measurement.

Citation Download Citation

William J. O. Boyle, Kenneth T. V. Grattan, Andrew W. Palmer, and B. T. Meggitt "Application of low-coherence optical fiber Doppler anemometry to fluid-flow measurement: optical system considerations", Proc. SPIE 1511, Fiber Optic Sensors: Engineering and Applications, (1 August 1991); https://doi.org/10.1117/12.45978

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