Using the power-flow equation, we have examined the state of mode coupling in strained and unstrained step-index plastic optical fibers. The strained fibers show much stronger mode coupling than unstrained fibers of the same types. As a result, the coupling lengths where equilibrium mode distribution is achieved and the lengths of fiber required for achieving a steady-state mode distribution for strained fibers are much shorter than the corresponding lengths for unstrained fibers.
© 2006 Optical Society of America
Original Manuscript: March 30, 2006
Manuscript Accepted: April 28, 2006
Svetislav Savović and Alexandar Djordjevich, "Mode coupling in strained and unstrained step-index plastic optical fibers," Appl. Opt. 45, 6775-6780 (2006)