摘要：The influence of the circular
birefringence on the measurement performance was analyzed based on the
Polarization Properties of FBG in this paper. Due to the circular
birefringence, the linear relationship between the max of PDL and pressure has been broken down. To estimate the cross
sensitivity, a new parameter named relative peak of PDL (RPPDL) is proposed. Under different
circular birefringence, the same pressure sensitivity of
sensor has been achieved. The
theo- retical analysis and experiment
results prove that transverse strain sensor of FBG is insensitive to the
circular birefrin- gence by applying the RPPDL. This research can be provided to useful and practical application.
关键词：Circularly Birefringence; Polarization Propertied; FBG Weak Pressure Sensor; The Relative Peak of PDL (RPPDL)
