Abstract
A novel polarization maintaining fiber (PMF) loop is proposed and used for an
interferometric fiber optic gyroscope (FOG). By splicing a conventional PMF loop
with two pigtailed polarization beam splitters, polarized light can be guided to
propagate along the slow and fast axes of the PMF in sequence to double its
effective optical length in the loop. In particular, the resultant optical length in
the combined loop is partially self-compensated for some external disturbances, such
as transverse strain. Primary experiments on the FOG using the proposed loop
demonstrate that the average static bias deviation between -40 and +60 oC is less
than 0.050 deg./h, and the average bias variation under conventional random
vibration test is less than 0.10 deg./h.
© 2011 Chinese Optics Letters
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