Novel fiber optic microbend pressure sensor

Naibin Ma

doi:10.1117/12.373000

9 December 1999 Novel fiber optic microbend pressure sensor

Naibin Ma

Proceedings Volume 3860, Fiber Optic Sensor Technology and Applications; (1999) https://doi.org/10.1117/12.373000
Event: Photonics East '99, 1999, Boston, MA, United States

Abstract

A novel fiber optic sensor employing microbend modulator and small-displacement diaphragm with hard center is presented in this paper. The sensor is made up of isolation diaphragm, silicon oil, sensing diaphragm, microbend modulator, sensing optical fiber, reference optical fiber, supporting platform, adjusting bolt, front cover and back cover etc. It can be used to measure the pressure of gas or liquid. When the pressure is applied to the isolation diaphragm, it passes on it to the sensing diaphragm through silicon oil. Then the hard center of the sensing diaphragm produces small displacement. Thus the light in the sensing optical fiber between the microbend modulator is attenuated. By detecting the output light power, the relationship of the input pressure and relative output light power is obtained. The basic structure is given and the sensing mechanism is discussed. Experiments have shown a satisfactory result. The sensitivity and measuring range of the sensor can be modified by altering the mechanical wavelength of the microbend modulator, ratio of the teeth number of the two deformer plates or by changing the parameters of the sensing diaphragm. The sensor has the function of zero adjustment and overload protection.

Citation Download Citation

Naibin Ma "Novel fiber optic microbend pressure sensor", Proc. SPIE 3860, Fiber Optic Sensor Technology and Applications, (9 December 1999); https://doi.org/10.1117/12.373000

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