By using the power flow equation, we have examined the state of mode coupling in strained and unstrained step-index glass optical fibers. Strained fibers show stronger mode coupling than their unstrained counterparts of the same type. As a result, the coupling length where equilibrium mode distribution is achieved and the length of fiber required for achieving the steady-state mode distribution are shorter for strained than for unstrained fibers.
© 2010 Optical Society of America
Fiber Optics and Optical Communications
Original Manuscript: April 26, 2010
Revised Manuscript: August 9, 2010
Manuscript Accepted: August 13, 2010
Published: September 14, 2010
Alexandar Djordjevich, Svetislav Savović, Peter W. Tse, Branko Drljača, and Ana Simović, "Mode coupling in strained and unstrained step-index glass optical fibers," Appl. Opt. 49, 5076-5080 (2010)