An in-fiber Bragg grating (FBG) dynamic strain sensing system based on a fiber ring laser configuration and the eigenvector spectrum analysis method, is proposed and demonstrated. An ultrahigh dynamic strain resolution of 3.4×10–6 nε /Hz1/2 is achieved due to both the use of the advanced spectrum analysis method and the high optical signal to noise ratio (SNR) (~65dB) of the sensing signal. This is the highest dynamic strain resolution achieved so far for a FBG-only sensor, to the best of our knowledge.

© 2007 Optical Society of America

PDF Article


You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
Login to access OSA Member Subscription