Abstract
An inline time-division multiplexing fiber Fabry-Perot (TDM-FFP) sensor
system based on low-reflectivity fiber Bragg gratings (FBGs) is ideally suited
to many applications. The intrinsic multiple reflections crosstalk (MRC) phenomenon
in the inline TDM-FFP sensor system is a serious problem that limits the multiplexing
number of sensors, which hindrances its practical applications. In this paper,
a detailed analysis of the MRC in the inline TDM-FFP sensor system using phase
generated carrier (PGC) scheme is reported. The equations of the interference
intensity in the inline TDM-FFP sensor system with two sensors are deduced.
The characteristics of the MRC are theoretically analyzed according to the
equations and experimentally demonstrated. Finally, the instability of the
MRC induced by random phase relationships of the sensors is analyzed using
statistical method. The experimental results show that the crosstalk from
the first sensor to the second sensor is ranged from
$-$
36.48 to
$-$
67.64 dB and to the
third sensor is ranged from
$-$
16.02 to
$-$
60.64 dB.
© 2013 IEEE
PDF Article
More Like This
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription