A method for calculating the coupling coefficient in step-index multimode optical fibers is verified for glass fibers by comparison to published data and to an analytical solution for the steady-state mode distribution. The coefficient that the method calculates is used to determine the state of mode coupling along the fiber, including the coupling length for achieving the equilibrium mode distribution when measurement of fiber characteristics (such as linear attenuation or bandwidth) becomes meaningful.
© 2009 Optical Society of America
Fiber Optics and Optical Communications
Original Manuscript: July 2, 2009
Manuscript Accepted: July 15, 2009
Published: July 28, 2009
Svetislav Savović and Alexandar Djordjevich, "Calculation of the coupling coefficient in step index glass optical fibers," Appl. Opt. 48, 4496-4500 (2009)