Abstract

A fiber-optic displacement sensor with temporally separated signal and reference channels is proposed. The sensing technique used is based on determining the relative amplitude of the signal and reference pulses that together form a double pulse. The relative amplitude of the pulses in the double pulse is a function of the displacement. A setup to generate the double pulse with individual pulses of 5-ns duration and 10-ns delay is described. A novel signal processing technique, used to determine the relative amplitude of such pulses in the double pulse by analyzing different portions of the signal spectrum, is explained. Experimental data are also provided.

© 1988 Optical Society of America

Fiber-optic rotary displacement sensor with wavelength encoding

W. B. Spillman and Peter L. Fuhr
Appl. Opt. 27(15) 3081-3084 (1988)

Fiber-optic-based absolute displacement sensors at 1500 nm by means of a variant of channeled spectrum signal recovery

Christophe Boulet, Mark Hathaway, and David A. Jackson
Opt. Lett. 29(14) 1602-1604 (2004)

Optical fiber Fabry-Perot sensors

Shiao-Min Tseng and Chin-Lin Chen
Appl. Opt. 27(3) 547-551 (1988)

Axial and angular displacement fiber-optic sensor

Daniel Sagrario and Patricia Mead
Appl. Opt. 37(28) 6748-6754 (1998)

Technique for referencing of fiber-optic intensity-modulated sensors by use of counterpropagating signals

Celia Sánchez-Pérez, Augusto García-Valenzuela, G. Eduardo Sandoval-Romero, Joel Villatoro, and Juan Hernández-Cordero
Opt. Lett. 29(13) 1467-1469 (2004)