Multipath interference (MPI) is caused by the beating between a signal and its weak replica. In a few mode fibers, a
replica of the signal propagates as a higher order mode. Since the optical path length of a higher order mode is different
from the fundamental mode, it leads to interference pattern at the output end of the fiber, which degrades the system
performance. In this paper, a simple method is proposed to reduce such kind of MPI effect by using a spatial filter in a
4F system. A higher order mode has higher spatial frequency components and therefore, choosing a low pass spatial
filter with a suitable cutoff frequency, some part of the unwanted higher order mode can be suppressed and then MPI can
be reduced. The idea is validated by simulation results.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.