Applications Of Fiber Optic Coupler Sensors

David W. Gerdt

doi:10.1117/12.959986

19 January 1989 Applications Of Fiber Optic Coupler Sensors

David W. Gerdt

Proceedings Volume 0990, Chemical, Biochemical, and Environmental Applications of Fibers; (1989) https://doi.org/10.1117/12.959986
Event: O-E/Fiber LASE '88, 1988, Boston, MA, United States

Abstract

A new type of single mode fiber optic sensor is described which possesses broad application to various sensor configurations. The sensor uses a potted fused tapered biconical fusion coupler as a strain transducer element. Changing or imposing conditions of internal stress near the fusion joint cause the output fiber coupling ratio to change. The overall excess loss of the coupler remains constant, only a change in output coupling ratio is observed. This characteristic is highly desirable for feeding the inverting and noninverting inputs of an electronic differential amplifier through application of a photoconductive device. A variety of geometrical configurations allow a coupler sensor to be designed as a differential pressure sensor with a wide range of applications. The sensor exhibits no observable one-over-f noise from over 10K Hertz to the steady state. Pressure oscillations of extremely low amplitude and frequency allow applications to various geophysical and chemical sensors.

Citation Download Citation

David W. Gerdt "Applications Of Fiber Optic Coupler Sensors", Proc. SPIE 0990, Chemical, Biochemical, and Environmental Applications of Fibers, (19 January 1989); https://doi.org/10.1117/12.959986

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