Technique for referencing of fiber-optic intensity-modulated sensors by use of counterpropagating signals.
We present a new all-optical fiber-referencing scheme for intensity-modulated sensors. It consists of a closed loop traversed by sensing and reference optical signals in opposite directions. With the proposed scheme the noise induced by power fluctuations of the optical source and mechanical perturbations can be greatly reduced. We experimentally demonstrate the efficiency of the scheme and discuss its use in a sensor array.
Sánchez-Pérez
Celia
C
Centro de Ciencias Aplicadas y Desarrollo Tecnológico, Universidad Nacional Autónoma de México, Ciudad Universitaria, Mexico City 04510, Mexico. celias@aleph.cinstrum.unam.mx
García-Valenzuela
Augusto
A
Sandoval-Romero
G Eduardo
GE
Villatoro
Joel
J
Hernández-Cordero
Juan
J