A distributed acoustic sensor (DAS) based on two-mode fiber is demonstrated. By using φ-OTDR, the backscattered light from higher order mode can be used to quantify vibrations. By combining the result obtained from different mode, 2.52dB improvement in noise floor is achieved. The results confirm that few-mode fiber can be used for DAS applications.

© 2019 The Author(s)

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