Fiber-optic interferometric sensor arrays with freedom from source phase-induced noise.
We propose arrays of all-passive remote sensors with freedom from both source phase-induced intensity noise and cross talk between sensors. These arrays employ high-duty-cycle time-domain addressing, utilize laser diodes, and have downlead insensitivity. A synthetic heterodyne demodulation technique is used to prevent environmentally induced signal fading. An experimental all-fiber implementation of a single remote sensor yielded a measured sensitivity of below 40 microrad/ radicalHz at signal frequencies above 600 Hz.
Brooks
J L
JL
Tur
M
M
Kim
B Y
BY
Fesler
K A
KA
Shaw
H J
HJ