Abstract
We analyze the beating of coherently copropagating modes in a few-mode optical fiber using two
complementary techniques, which involve respectively stretching the sample under examination and sweeping the
wavelength for different polarizations of the incoming light. We show that analyzing the spectral composition of the
intensity fluctuations allows for a direct measurement of the difference between the mode propagation constants and
between their group delays, and we observe the lifting of the mode degeneracy, most possibly induced by residual
anisotropies and birefringence. The outlined methodology can be used for the modal characterization of few-mode fibers
employed in sensing and in spatially-multiplexed communications.
© 2013 IEEE
PDF Article
More Like This
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription